1978 lines
67 KiB
C
Executable File
1978 lines
67 KiB
C
Executable File
/*************************************************************************
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* *
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* YAP Prolog *
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-2003 *
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* *
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**************************************************************************
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* *
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* File: %W% %G% *
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* Last rev: 22-1-03 *
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* mods: *
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* comments: Prolog's scanner *
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* *
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*************************************************************************/
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/*
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* Description:
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*
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* This module produces a list of tokens for use by the parser. The calling
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* program should supply a routine int nextch(charpos) int *charpos; which,
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* when called should produce the next char or -1 if none availlable. The
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* scanner will stop producing tokens when it either finds an end of file
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* (-1) or a token consisting of just '.' followed by a blank or control
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* char. Scanner errors will be signalled by the scanner exiting with a non-
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* zero ErrorMsg and ErrorPos. Note that, even in this case, the scanner
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* will try to find the end of the term. A function char
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* *AllocScannerMemory(nbytes) should be supplied for allocating (temporary)
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* space for strings and for the table of prolog variables occurring in the
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* term.
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*
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*/
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/**
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@defgroup Formal_Syntax Syntax of Terms
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@ingroup Syntax
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@{
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Prolog tokens are grouped into the following categories:
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+ Numbers
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Numbers can be further subdivided into integer and floating-point numbers.
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+ Integers
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Integer numbers
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are described by the following regular expression:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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<integer> := {<digit>+<single-quote>|0{xXo}}<alpha_numeric_char>+
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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where {...} stands for optionality, \a + optional repetition (one or
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more times), \a \\\<digit\\\> denotes one of the characters 0 ... 9, \a |
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denotes or, and \a \\\<single-quote\\\> denotes the character "'". The digits
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before the \a \\\<single-quote\\\> character, when present, form the number
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basis, that can go from 0, 1 and up to 36. Letters from `A` to
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`Z` are used when the basis is larger than 10.
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Note that if no basis is specified then base 10 is assumed. Note also
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that the last digit of an integer token can not be immediately followed
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by one of the characters 'e', 'E', or '.'.
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Following the ISO standard, YAP also accepts directives of the
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form `0x` to represent numbers in hexadecimal base and of the form
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`0o` to represent numbers in octal base. For usefulness,
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YAP also accepts directives of the form `0X` to represent
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numbers in hexadecimal base.
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Example:
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the following tokens all denote the same integer
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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10 2'1010 3'101 8'12 16'a 36'a 0xa 0o12
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Numbers of the form `0'a` are used to represent character
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constants. So, the following tokens denote the same integer:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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0'd 100
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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YAP (version 6.3.4) supports integers that can fit
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the word size of the machine. This is 32 bits in most current machines,
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but 64 in some others, such as the Alpha running Linux or Digital
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Unix. The scanner will read larger or smaller integers erroneously.
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+ Floats
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Floating-point numbers are described by:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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<float> := <digit>+{<dot><digit>+}
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<exponent-marker>{<sign>}<digit>+
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|<digit>+<dot><digit>+
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{<exponent-marker>{<sign>}<digit>+}
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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where \a \\\<dot\\\> denotes the decimal-point character '.',
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\a \\\<exponent-marker\\\> denotes one of 'e' or 'E', and \a \\\<sign\\\>
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denotes
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one of '+' or '-'.
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Examples:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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10.0 10e3 10e-3 3.1415e+3
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Floating-point numbers are represented as a double in the target
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machine. This is usually a 64-bit number.
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+ Strings Character Strings
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Strings are described by the following rules:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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string --> '"' string_quoted_characters '"'
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string --> '`' string_quoted_characters '`'
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string_quoted_characters --> '"' '"' string_quoted_characters
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string_quoted_characters --> '`' '`' string_quoted_characters
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string_quoted_characters --> '\'
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escape_sequence string_quoted_characters
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string_quoted_characters -->
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string_character string_quoted_characters
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escape_sequence --> 'a' | 'b' | 'r' | 'f' | 't' | 'n' | 'v'
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escape_sequence --> '\' | '"' | ''' | '`'
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escape_sequence --> at_most_3_octal_digit_seq_char '\'
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escape_sequence --> 'x' at_most_2_hexa_digit_seq_char '\'
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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where `string_character` in any character except the double quote
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and escape characters.
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Examples:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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"" "a string" "a double-quote:"""
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The first string is an empty string, the last string shows the use of
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double-quoting. The implementation of YAP represents strings as
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lists of integers. Since YAP 4.3.0 there is no static limit on string
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size.
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Escape sequences can be used to include the non-printable characters
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`a` (alert), `b` (backspace), `r` (carriage return),
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`f` (form feed), `t` (horizontal tabulation), `n` (new
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line), and `v` (vertical tabulation). Escape sequences also be
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include the meta-characters `\\`, `"`, `'`, and
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```. Last, one can use escape sequences to include the characters
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either as an octal or hexadecimal number.
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The next examples demonstrates the use of escape sequences in YAP:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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"\x0c\" "\01\" "\f" "\\"
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The first three examples return a list including only character 12 (form
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feed). The last example escapes the escape character.
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Escape sequences were not available in C-Prolog and in original
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versions of YAP up to 4.2.0. Escape sequences can be disable by using:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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:- yap_flag(character_escapes,false).
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Since 6.3.4 YAP supports compact strings, that are not represented as
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lists of codes, but instead as a sequence of UTF-8 encoded characters
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in the execution stack. These strings do not require allocating a
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symbol, as atoms do, but are much more compact than using lists of
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codes.
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+ Atoms Atoms
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Atoms are defined by one of the following rules:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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atom --> solo-character
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atom --> lower-case-letter name-character*
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atom --> symbol-character+
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atom --> single-quote single-quote
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atom --> ''' atom_quoted_characters '''
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atom_quoted_characters --> ''' ''' atom_quoted_characters
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atom_quoted_characters --> '\' atom_sequence string_quoted_characters
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atom_quoted_characters --> character string_quoted_characters
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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where:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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<solo-character> denotes one of: ! ;
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<symbol-character> denotes one of: # & * + - . / : <
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= > ? @ \ ^ ~ `
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<lower-case-letter> denotes one of: a...z
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<name-character> denotes one of: _ a...z A...Z 0....9
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<single-quote> denotes: '
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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and `string_character` denotes any character except the double quote
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and escape characters. Note that escape sequences in strings and atoms
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follow the same rules.
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Examples:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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a a12x '$a' ! => '1 2'
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Version `4.2.0` of YAP removed the previous limit of 256
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characters on an atom. Size of an atom is now only limited by the space
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available in the system.
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+ Variables Variables
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Variables are described by:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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<variable-starter><variable-character>+
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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where
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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<variable-starter> denotes one of: _ A...Z
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<variable-character> denotes one of: _ a...z A...Z
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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If a variable is referred only once in a term, it needs not to be named
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and one can use the character `_` to represent the variable. These
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variables are known as anonymous variables. Note that different
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occurrences of `_` on the same term represent <em>different</em>
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anonymous variables.
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+ Punctuation Tokens
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Punctuation tokens consist of one of the following characters:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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( ) , [ ] { } |
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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These characters are used to group terms.
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@subsection Layout Layout
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Any characters with ASCII code less than or equal to 32 appearing before
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a token are ignored.
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All the text appearing in a line after the character \a % is taken to
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be a comment and ignored (including \a %). Comments can also be
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inserted by using the sequence `/\*` to start the comment and
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`\*` followed by `/` to finish it. In the presence of any sequence of comments
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or
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layout characters, the YAP parser behaves as if it had found a
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single blank character. The end of a file also counts as a blank
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character for this purpose.
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+ Encoding Wide Character Support
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YAP now implements a SWI-Prolog compatible interface to wide
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characters and the Universal Character Set (UCS). The following text
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was adapted from the SWI-Prolog manual.
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YAP now supports wide characters, characters with character
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codes above 255 that cannot be represented in a single byte.
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<em>Universal Character Set</em> (UCS) is the ISO/IEC 10646 standard
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that specifies a unique 31-bits unsigned integer for any character in
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any language. It is a superset of 16-bit Unicode, which in turn is
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a superset of ISO 8859-1 (ISO Latin-1), a superset of US-ASCII. UCS
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can handle strings holding characters from multiple languages and
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character classification (uppercase, lowercase, digit, etc.) and
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operations such as case-conversion are unambiguously defined.
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For this reason YAP, following SWI-Prolog, has two representations for
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atoms. If the text fits in ISO Latin-1, it is represented as an array
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of 8-bit characters. Otherwise the text is represented as an array of
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wide chars, which may take 16 or 32 bits. This representational issue
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is completely transparent to the Prolog user. Users of the foreign
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language interface sometimes need to be aware of these issues though.
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Character coding comes into view when characters of strings need to be
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read from or written to file or when they have to be communicated to
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other software components using the foreign language interface. In this
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section we only deal with I/O through streams, which includes file I/O
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as well as I/O through network sockets.
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+ Stream_Encoding Wide character encodings on streams
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Although characters are uniquely coded using the UCS standard
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internally, streams and files are byte (8-bit) oriented and there are a
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variety of ways to represent the larger UCS codes in an 8-bit octet
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stream. The most popular one, especially in the context of the web, is
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UTF-8. Bytes 0...127 represent simply the corresponding US-ASCII
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character, while bytes 128...255 are used for multi-byte
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encoding of characters placed higher in the UCS space. Especially on
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MS-Windows the 16-bit Unicode standard, represented by pairs of bytes is
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also popular.
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Prolog I/O streams have a property called <em>encoding</em> which
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specifies the used encoding that influence `get_code/2` and
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`put_code/2` as well as all the other text I/O predicates.
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The default encoding for files is derived from the Prolog flag
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`encoding`, which is initialised from the environment. If the
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environment variable `LANG` ends in "UTF-8", this encoding is
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assumed. Otherwise the default is `text` and the translation is
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left to the wide-character functions of the C-library (note that the
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Prolog native UTF-8 mode is considerably faster than the generic
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`mbrtowc()` one). The encoding can be specified explicitly in
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load_files/2 for loading Prolog source with an alternative
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encoding, `open/4` when opening files or using `set_stream/2` on
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any open stream (not yet implemented). For Prolog source files we also
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provide the `encoding/1` directive that can be used to switch
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between encodings that are compatible to US-ASCII (`ascii`,
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`iso_latin_1`, `utf8` and many locales).
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For
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additional information and Unicode resources, please visit
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<http://www.unicode.org/>.
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YAP currently defines and supports the following encodings:
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+ octet
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Default encoding for <em>binary</em> streams. This causes
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the stream to be read and written fully untranslated.
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+ ascii
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7-bit encoding in 8-bit bytes. Equivalent to `iso_latin_1`,
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but generates errors and warnings on encountering values above
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127.
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+ iso_latin_1
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8-bit encoding supporting many western languages. This causes
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the stream to be read and written fully untranslated.
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+ text
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C-library default locale encoding for text files. Files are read and
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written using the C-library functions `mbrtowc()` and
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`wcrtomb()`. This may be the same as one of the other locales,
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notably it may be the same as `iso_latin_1` for western
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languages and `utf8` in a UTF-8 context.
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+ utf8
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Multi-byte encoding of full UCS, compatible to `ascii`.
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See above.
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+ unicode_be
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Unicode Big Endian. Reads input in pairs of bytes, most
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significant byte first. Can only represent 16-bit characters.
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+ unicode_le
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Unicode Little Endian. Reads input in pairs of bytes, least
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significant byte first. Can only represent 16-bit characters.
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Note that not all encodings can represent all characters. This implies
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that writing text to a stream may cause errors because the stream
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cannot represent these characters. The behaviour of a stream on these
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errors can be controlled using `open/4` or `set_stream/2` (not
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implemented). Initially the terminal stream write the characters using
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Prolog escape sequences while other streams generate an I/O exception.
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+ BOM BOM: Byte Order Mark
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From Stream Encoding, you may have got the impression that
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text-files are complicated. This section deals with a related topic,
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making live often easier for the user, but providing another worry to
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the programmer. *BOM* or <em>Byte Order Marker</em> is a technique
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for identifying Unicode text-files as well as the encoding they
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use. Such files start with the Unicode character `0xFEFF`, a
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non-breaking, zero-width space character. This is a pretty unique
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sequence that is not likely to be the start of a non-Unicode file and
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uniquely distinguishes the various Unicode file formats. As it is a
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zero-width blank, it even doesn't produce any output. This solves all
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problems, or ...
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Some formats start of as US-ASCII and may contain some encoding mark to
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switch to UTF-8, such as the `encoding="UTF-8"` in an XML header.
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Such formats often explicitly forbid the the use of a UTF-8 BOM. In
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other cases there is additional information telling the encoding making
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the use of a BOM redundant or even illegal.
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The BOM is handled by the `open/4` predicate. By default, text-files are
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probed for the BOM when opened for reading. If a BOM is found, the
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encoding is set accordingly and the property `bom(true)` is
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available through stream_property/2. When opening a file for
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writing, writing a BOM can be requested using the option
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`bom(true)` with `open/4`.
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*/
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#include "Yap.h"
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#include "Yatom.h"
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#include "YapHeap.h"
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#include "yapio.h"
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#include "alloc.h"
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#include "eval.h"
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/* stuff we want to use in standard YAP code */
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#include "YapText.h"
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#if _MSC_VER || defined(__MINGW32__)
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#if HAVE_FINITE == 1
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#undef HAVE_FINITE
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#endif
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#include <windows.h>
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#endif
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#include "iopreds.h"
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#if HAVE_STRING_H
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#include <string.h>
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#endif
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#if HAVE_WCTYPE_H
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#include <wctype.h>
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#endif
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#if O_LOCALE
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#include "locale.h"
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#endif
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/* You just can't trust some machines */
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#define my_isxdigit(C, SU, SL) \
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(chtype(C) == NU || (C >= 'A' && C <= (SU)) || (C >= 'a' && C <= (SL)))
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#define my_isupper(C) (C >= 'A' && C <= 'Z')
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#define my_islower(C) (C >= 'a' && C <= 'z')
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static Term float_send(char *, int);
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static Term get_num(int *, int *, struct stream_desc *, char *, UInt, int);
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static void
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Yap_setCurrentSourceLocation( struct stream_desc *s )
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{
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CACHE_REGS
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#if HAVE_SOCKET
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if (s->status & Socket_Stream_f)
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LOCAL_SourceFileName = AtomSocket;
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else
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#endif
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if (s->status & Pipe_Stream_f)
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LOCAL_SourceFileName =AtomPipe;
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else if (s->status & InMemory_Stream_f)
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LOCAL_SourceFileName = AtomCharsio;
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else
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LOCAL_SourceFileName = s->name;
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LOCAL_SourceFileLineno = s->linecount;
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}
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/* token table with some help from Richard O'Keefe's PD scanner */
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static char chtype0[NUMBER_OF_CHARS + 1] = {
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EF,
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/* nul soh stx etx eot enq ack bel bs ht nl vt np cr so si
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*/
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BS, BS, BS, BS, BS, BS, BS, BS, BS,
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BS, BS, BS, BS, BS, BS, BS,
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/* dle dc1 dc2 dc3 dc4 nak syn etb can em sub esc fs gs rs us
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*/
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BS, BS, BS, BS, BS, BS, BS, BS, BS,
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BS, BS, BS, BS, BS, BS, BS,
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/* sp ! " # $ % & ' ( ) * + , - . / */
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BS, SL, DC, SY, LC, CC, SY, QT, BK,
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BK, SY, SY, BK, SY, SY, SY,
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/* 0 1 2 3 4 5 6 7 8 9 : ; < = > ? */
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NU, NU, NU, NU, NU, NU, NU, NU, NU,
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NU, SY, SL, SY, SY, SY, SY,
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/* @ A B C D E F G H I J K L M N O */
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SY, UC, UC, UC, UC, UC, UC, UC, UC,
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UC, UC, UC, UC, UC, UC, UC,
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/* P Q R S T U V W X Y Z [ \ ] ^ _ */
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UC, UC, UC, UC, UC, UC, UC, UC, UC,
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UC, UC, BK, SY, BK, SY, UL,
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/* ` a b c d e f g h i j k l m n o */
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SY, LC, LC, LC, LC, LC, LC, LC, LC,
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LC, LC, LC, LC, LC, LC, LC,
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/* p q r s t u v w x y z { | } ~ del */
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LC, LC, LC, LC, LC, LC, LC, LC, LC,
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LC, LC, BK, BK, BK, SY, BS,
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|
||
/* 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143
|
||
*/
|
||
BS, BS, BS, BS, BS, BS, BS, BS, BS,
|
||
BS, BS, BS, BS, BS, BS, BS,
|
||
|
||
/* 144 145 147 148 149 150 151 152 153 154 155 156 157 158 159
|
||
*/
|
||
BS, BS, BS, BS, BS, BS, BS, BS, BS,
|
||
BS, BS, BS, BS, BS, BS, BS,
|
||
|
||
/* ¡ ¢ £ ¤ ¥ ¦ § ¨ © ª « ¬ ® ¯ */
|
||
BS, SY, SY, SY, SY, SY, SY, SY, SY,
|
||
SY, LC, SY, SY, SY, SY, SY,
|
||
|
||
/* ° ± ² ³ ´ µ ¶ · ¸ ¹ º » ¼ ½ ¾ ¿ */
|
||
SY, SY, LC, LC, SY, SY, SY, SY, SY,
|
||
LC, LC, SY, SY, SY, SY, SY,
|
||
|
||
/* À Á Â Ã Ä Å Æ Ç È É Ê Ë Ì Í Î Ï */
|
||
UC, UC, UC, UC, UC, UC, UC, UC, UC,
|
||
UC, UC, UC, UC, UC, UC, UC,
|
||
|
||
/* Ð Ñ Ò Ó Ô Õ Ö × Ø Ù Ú Û Ü Ý Þ ß */
|
||
#ifdef vms
|
||
UC, UC, UC, UC, UC, UC, UC, UC, UC,
|
||
UC, UC, UC, UC, UC, UC, LC,
|
||
#else
|
||
UC, UC, UC, UC, UC, UC, UC, SY, UC,
|
||
UC, UC, UC, UC, UC, UC, LC,
|
||
#endif
|
||
/* à á â ã ä å æ ç è é ê ë ì í î ï */
|
||
LC, LC, LC, LC, LC, LC, LC, LC, LC,
|
||
LC, LC, LC, LC, LC, LC, LC,
|
||
|
||
/* ð ñ ò ó ô õ ö ÷ ø ù ú û ü cannot write the last
|
||
* three because of lcc */
|
||
#ifdef vms
|
||
LC, LC, LC, LC, LC, LC, LC, LC, LC,
|
||
LC, LC, LC, LC, LC, LC, LC
|
||
#else
|
||
LC, LC, LC, LC, LC, LC, LC, SY, LC,
|
||
LC, LC, LC, LC, LC, LC, LC
|
||
#endif
|
||
};
|
||
|
||
char *Yap_chtype = chtype0 + 1;
|
||
|
||
int Yap_wide_chtype(Int ch) {
|
||
#if HAVE_WCTYPE_H
|
||
if (iswalnum(ch)) {
|
||
if (iswlower(ch))
|
||
return LC;
|
||
if (iswdigit(ch))
|
||
return NU;
|
||
return UC;
|
||
}
|
||
if (iswpunct(ch))
|
||
return SY;
|
||
#endif
|
||
return BS;
|
||
}
|
||
|
||
static inline int getchr__(struct stream_desc* inp) {
|
||
int c = inp->stream_wgetc_for_read(inp-GLOBAL_Stream);
|
||
if (!GLOBAL_CharConversionTable || c < 0 || c >= 256)
|
||
return c;
|
||
|
||
return GLOBAL_CharConversionTable[c];
|
||
}
|
||
|
||
#define getchr(inp) getchr__(inp)
|
||
#define getchrq(inp) inp->stream_wgetc(inp-GLOBAL_Stream)
|
||
|
||
/* in case there is an overflow */
|
||
typedef struct scanner_extra_alloc {
|
||
struct scanner_extra_alloc *next;
|
||
void *filler;
|
||
} ScannerExtraBlock;
|
||
|
||
static char *AllocScannerMemory(unsigned int size) {
|
||
CACHE_REGS
|
||
char *AuxSpScan;
|
||
|
||
AuxSpScan = LOCAL_ScannerStack;
|
||
size = AdjustSize(size);
|
||
if (LOCAL_ScannerExtraBlocks) {
|
||
struct scanner_extra_alloc *ptr;
|
||
|
||
if (!(ptr = (struct scanner_extra_alloc *)malloc(
|
||
size + sizeof(ScannerExtraBlock)))) {
|
||
return NULL;
|
||
}
|
||
ptr->next = LOCAL_ScannerExtraBlocks;
|
||
LOCAL_ScannerExtraBlocks = ptr;
|
||
return (char *)(ptr + 1);
|
||
} else if (LOCAL_TrailTop <= AuxSpScan + size) {
|
||
UInt alloc_size = sizeof(CELL) * K16;
|
||
|
||
if (size > alloc_size)
|
||
alloc_size = size;
|
||
if (!Yap_growtrail(alloc_size, TRUE)) {
|
||
struct scanner_extra_alloc *ptr;
|
||
|
||
if (!(ptr = (struct scanner_extra_alloc *)malloc(
|
||
size + sizeof(ScannerExtraBlock)))) {
|
||
return NULL;
|
||
}
|
||
ptr->next = LOCAL_ScannerExtraBlocks;
|
||
LOCAL_ScannerExtraBlocks = ptr;
|
||
return (char *)(ptr + 1);
|
||
}
|
||
}
|
||
LOCAL_ScannerStack = AuxSpScan + size;
|
||
return AuxSpScan;
|
||
}
|
||
|
||
static void PopScannerMemory(char *block, unsigned int size) {
|
||
CACHE_REGS
|
||
if (block == LOCAL_ScannerStack - size) {
|
||
LOCAL_ScannerStack -= size;
|
||
} else if (block == (char *)(LOCAL_ScannerExtraBlocks + 1)) {
|
||
struct scanner_extra_alloc *ptr = LOCAL_ScannerExtraBlocks;
|
||
|
||
LOCAL_ScannerExtraBlocks = ptr->next;
|
||
free(ptr);
|
||
}
|
||
}
|
||
|
||
char *Yap_AllocScannerMemory(unsigned int size) {
|
||
/* I assume memory has been initialised */
|
||
return AllocScannerMemory(size);
|
||
}
|
||
|
||
extern double atof(const char *);
|
||
|
||
static Term float_send(char *s, int sign) {
|
||
Float f = (Float)(sign * atof(s));
|
||
#if HAVE_ISFINITE || defined(isfinite)
|
||
if (trueGlobalPrologFlag(ISO_FLAG)) { /* iso */
|
||
if (!isfinite(f)) {
|
||
CACHE_REGS
|
||
LOCAL_ErrorMessage = "Float overflow while scanning";
|
||
return (MkEvalFl(f));
|
||
}
|
||
}
|
||
#elif HAVE_FINITE
|
||
if (trueGlobalPrologFlag(ISO_FLAG)) { /* iso */
|
||
if (!finite(f)) {
|
||
LOCAL_ErrorMessage = "Float overflow while scanning";
|
||
return (MkEvalFl(f));
|
||
}
|
||
}
|
||
#endif
|
||
{
|
||
CACHE_REGS
|
||
return (MkEvalFl(f));
|
||
}
|
||
}
|
||
|
||
/* we have an overflow at s */
|
||
static Term read_int_overflow(const char *s, Int base, Int val, int sign) {
|
||
#ifdef USE_GMP
|
||
/* try to scan it as a bignum */
|
||
mpz_t new;
|
||
Term t;
|
||
|
||
mpz_init_set_str(new, s, base);
|
||
if (sign < 0)
|
||
mpz_neg(new, new);
|
||
t = Yap_MkBigIntTerm(new);
|
||
mpz_clear(new);
|
||
return t;
|
||
#else
|
||
CACHE_REGS
|
||
/* try to scan it as a float */
|
||
return MkIntegerTerm(val);
|
||
#endif
|
||
}
|
||
|
||
static int send_error_message(char s[]) {
|
||
CACHE_REGS
|
||
LOCAL_ErrorMessage = s;
|
||
return 0;
|
||
}
|
||
|
||
static wchar_t read_quoted_char(int *scan_nextp, struct stream_desc* inp_stream) {
|
||
int ch;
|
||
|
||
/* escape sequence */
|
||
do_switch:
|
||
ch = getchrq(inp_stream);
|
||
switch (ch) {
|
||
case 10:
|
||
return 0;
|
||
case '\\':
|
||
return '\\';
|
||
case 'a':
|
||
return '\a';
|
||
case 'b':
|
||
return '\b';
|
||
case 'c':
|
||
while (chtype((ch = getchrq(inp_stream))) == BS)
|
||
;
|
||
{
|
||
if (ch == '\\') {
|
||
goto do_switch;
|
||
}
|
||
return ch;
|
||
}
|
||
case 'd':
|
||
return 127;
|
||
case 'e':
|
||
return '\x1B'; /* <ESC>, a.k.a. \e */
|
||
case 'f':
|
||
return '\f';
|
||
case 'n':
|
||
return '\n';
|
||
case 'r':
|
||
return '\r';
|
||
case 's': /* space */
|
||
return ' ';
|
||
case 't':
|
||
return '\t';
|
||
case 'u': {
|
||
int i;
|
||
wchar_t wc = '\0';
|
||
|
||
for (i = 0; i < 4; i++) {
|
||
ch = getchrq(inp_stream);
|
||
if (ch >= '0' && ch <= '9') {
|
||
wc += (ch - '0') << ((3 - i) * 4);
|
||
} else if (ch >= 'a' && ch <= 'f') {
|
||
wc += ((ch - 'a') + 10) << ((3 - i) * 4);
|
||
} else if (ch >= 'A' && ch <= 'F') {
|
||
wc += ((ch - 'A') + 10) << ((3 - i) * 4);
|
||
} else {
|
||
return send_error_message("invalid escape sequence");
|
||
}
|
||
}
|
||
return wc;
|
||
}
|
||
case 'U': {
|
||
int i;
|
||
wchar_t wc = '\0';
|
||
|
||
for (i = 0; i < 8; i++) {
|
||
ch = getchrq(inp_stream);
|
||
if (ch >= '0' && ch <= '9') {
|
||
wc += (ch - '0') << ((7 - i) * 4);
|
||
} else if (ch >= 'a' && ch <= 'f') {
|
||
wc += ((ch - 'a') + 10) << ((7 - i) * 4);
|
||
} else if (ch >= 'A' && ch <= 'F') {
|
||
wc += ((ch - 'A') + 10) << ((7 - i) * 4);
|
||
} else {
|
||
return send_error_message("invalid escape sequence");
|
||
}
|
||
}
|
||
return wc;
|
||
}
|
||
case 'v':
|
||
return '\v';
|
||
case 'z': /* Prolog end-of-file */
|
||
return send_error_message("invalid escape sequence \\z");
|
||
case '\'':
|
||
return '\'';
|
||
case '"':
|
||
return '"';
|
||
case '`':
|
||
return '`';
|
||
case '^':
|
||
if (trueGlobalPrologFlag(ISO_FLAG)) {
|
||
return send_error_message("invalid escape sequence");
|
||
} else {
|
||
ch = getchrq(inp_stream);
|
||
if (ch == '?') { /* delete character */
|
||
return 127;
|
||
} else if (ch >= 'a' && ch < 'z') { /* hexa */
|
||
return ch - 'a';
|
||
} else if (ch >= 'A' && ch < 'Z') { /* hexa */
|
||
return ch - 'A';
|
||
} else {
|
||
return '^';
|
||
}
|
||
}
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
/* character in octal: maximum of 3 digits, terminates with \ */
|
||
/* follow ISO */
|
||
{
|
||
unsigned char so_far = ch - '0';
|
||
ch = getchrq(inp_stream);
|
||
if (ch >= '0' && ch < '8') { /* octal */
|
||
so_far = so_far * 8 + (ch - '0');
|
||
ch = getchrq(inp_stream);
|
||
if (ch >= '0' && ch < '8') { /* octal */
|
||
so_far = so_far * 8 + (ch - '0');
|
||
ch = getchrq(inp_stream);
|
||
if (ch != '\\') {
|
||
return send_error_message("invalid octal escape sequence");
|
||
}
|
||
return so_far;
|
||
} else if (ch == '\\') {
|
||
return so_far;
|
||
} else {
|
||
return send_error_message("invalid octal escape sequence");
|
||
}
|
||
} else if (ch == '\\') {
|
||
return so_far;
|
||
} else {
|
||
return send_error_message("invalid octal escape sequence");
|
||
}
|
||
}
|
||
case 'x':
|
||
/* hexadecimal character (YAP allows empty hexadecimal */
|
||
{
|
||
unsigned char so_far = 0;
|
||
ch = getchrq(inp_stream);
|
||
if (my_isxdigit(ch, 'f', 'F')) { /* hexa */
|
||
so_far =
|
||
so_far * 16 + (chtype(ch) == NU
|
||
? ch - '0'
|
||
: (my_isupper(ch) ? ch - 'A' : ch - 'a') + 10);
|
||
ch = getchrq(inp_stream);
|
||
if (my_isxdigit(ch, 'f', 'F')) { /* hexa */
|
||
so_far =
|
||
so_far * 16 + (chtype(ch) == NU
|
||
? ch - '0'
|
||
: (my_isupper(ch) ? ch - 'A' : ch - 'a') + 10);
|
||
ch = getchrq(inp_stream);
|
||
if (ch == '\\') {
|
||
return so_far;
|
||
} else {
|
||
return send_error_message("invalid hexadecimal escape sequence");
|
||
}
|
||
} else if (ch == '\\') {
|
||
return so_far;
|
||
} else {
|
||
return send_error_message("invalid hexadecimal escape sequence");
|
||
}
|
||
} else if (ch == '\\') {
|
||
return so_far;
|
||
} else {
|
||
return send_error_message("invalid hexadecimal escape sequence");
|
||
}
|
||
}
|
||
default:
|
||
/* accept sequence. Note that the ISO standard does not
|
||
consider this sequence legal, whereas SICStus would
|
||
eat up the escape sequence. */
|
||
return send_error_message("invalid escape sequence");
|
||
}
|
||
}
|
||
|
||
static int num_send_error_message(char s[]) {
|
||
CACHE_REGS
|
||
LOCAL_ErrorMessage = s;
|
||
return TermNil;
|
||
}
|
||
|
||
/* reads a number, either integer or float */
|
||
|
||
static Term get_num(int *chp, int *chbuffp, StreamDesc *inp_stream, char *s,
|
||
UInt max_size, int sign) {
|
||
char *sp = s;
|
||
int ch = *chp;
|
||
Int val = 0L, base = ch - '0';
|
||
int might_be_float = TRUE, has_overflow = FALSE;
|
||
const unsigned char *decimalpoint;
|
||
|
||
*sp++ = ch;
|
||
ch = getchr(inp_stream);
|
||
/*
|
||
* because of things like 00'2, 03'2 and even better 12'2, I need to
|
||
* do this (have mercy)
|
||
*/
|
||
if (chtype(ch) == NU) {
|
||
*sp++ = ch;
|
||
if (--max_size == 0) {
|
||
return num_send_error_message("Number Too Long");
|
||
}
|
||
base = 10 * base + ch - '0';
|
||
ch = getchr(inp_stream);
|
||
}
|
||
if (ch == '\'') {
|
||
if (base > 36) {
|
||
return num_send_error_message("Admissible bases are 0..36");
|
||
}
|
||
might_be_float = FALSE;
|
||
if (--max_size == 0) {
|
||
return num_send_error_message("Number Too Long");
|
||
}
|
||
*sp++ = ch;
|
||
ch = getchr(inp_stream);
|
||
if (base == 0) {
|
||
CACHE_REGS
|
||
wchar_t ascii = ch;
|
||
int scan_extra = TRUE;
|
||
|
||
if (ch == '\\' &&
|
||
Yap_GetModuleEntry(CurrentModule)->flags & M_CHARESCAPE) {
|
||
ascii = read_quoted_char(&scan_extra, inp_stream);
|
||
}
|
||
/* a quick way to represent ASCII */
|
||
if (scan_extra)
|
||
*chp = getchr(inp_stream);
|
||
if (sign == -1) {
|
||
return MkIntegerTerm(-ascii);
|
||
}
|
||
return MkIntegerTerm(ascii);
|
||
} else if (base >= 10 && base <= 36) {
|
||
int upper_case = 'A' - 11 + base;
|
||
int lower_case = 'a' - 11 + base;
|
||
|
||
while (my_isxdigit(ch, upper_case, lower_case)) {
|
||
Int oval = val;
|
||
int chval =
|
||
(chtype(ch) == NU ? ch - '0'
|
||
: (my_isupper(ch) ? ch - 'A' : ch - 'a') + 10);
|
||
if (--max_size == 0) {
|
||
return num_send_error_message("Number Too Long");
|
||
}
|
||
*sp++ = ch;
|
||
val = oval * base + chval;
|
||
if (oval != (val - chval) / base) /* overflow */
|
||
has_overflow = (has_overflow || TRUE);
|
||
ch = getchr(inp_stream);
|
||
}
|
||
}
|
||
} else if (ch == 'x' && base == 0) {
|
||
might_be_float = FALSE;
|
||
if (--max_size == 0) {
|
||
return num_send_error_message("Number Too Long");
|
||
}
|
||
*sp++ = ch;
|
||
ch = getchr(inp_stream);
|
||
while (my_isxdigit(ch, 'F', 'f')) {
|
||
Int oval = val;
|
||
int chval =
|
||
(chtype(ch) == NU ? ch - '0'
|
||
: (my_isupper(ch) ? ch - 'A' : ch - 'a') + 10);
|
||
if (--max_size == 0) {
|
||
return num_send_error_message("Number Too Long");
|
||
}
|
||
*sp++ = ch;
|
||
val = val * 16 + chval;
|
||
if (oval != (val - chval) / 16) /* overflow */
|
||
has_overflow = TRUE;
|
||
ch = getchr(inp_stream);
|
||
}
|
||
*chp = ch;
|
||
} else if (ch == 'o' && base == 0) {
|
||
might_be_float = FALSE;
|
||
base = 8;
|
||
ch = getchr(inp_stream);
|
||
} else if (ch == 'b' && base == 0) {
|
||
might_be_float = FALSE;
|
||
base = 2;
|
||
ch = getchr(inp_stream);
|
||
} else {
|
||
val = base;
|
||
base = 10;
|
||
}
|
||
while (chtype(ch) == NU) {
|
||
Int oval = val;
|
||
if (!(val == 0 && ch == '0') || has_overflow) {
|
||
if (--max_size == 0) {
|
||
return num_send_error_message("Number Too Long");
|
||
}
|
||
*sp++ = ch;
|
||
}
|
||
if (ch - '0' >= base) {
|
||
CACHE_REGS
|
||
if (sign == -1)
|
||
return MkIntegerTerm(-val);
|
||
return MkIntegerTerm(val);
|
||
}
|
||
val = val * base + ch - '0';
|
||
if (val / base != oval || val - oval * base != ch - '0') /* overflow */
|
||
has_overflow = TRUE;
|
||
ch = getchr(inp_stream);
|
||
}
|
||
if (might_be_float && (ch == '.' || ch == 'e' || ch == 'E')) {
|
||
int has_dot = (ch == '.');
|
||
if (has_dot) {
|
||
unsigned char *dp;
|
||
int dc;
|
||
|
||
if (chtype(ch = getchr(inp_stream)) != NU) {
|
||
if (ch == 'e' || ch == 'E') {
|
||
if (trueGlobalPrologFlag(ISO_FLAG))
|
||
return num_send_error_message(
|
||
"Float format not allowed in ISO mode");
|
||
} else { /* followed by a letter, end of term? */
|
||
CACHE_REGS
|
||
sp[0] = '\0';
|
||
*chbuffp = '.';
|
||
*chp = ch;
|
||
if (has_overflow)
|
||
return read_int_overflow(s, base, val, sign);
|
||
if (sign == -1)
|
||
return MkIntegerTerm(-val);
|
||
return MkIntegerTerm(val);
|
||
}
|
||
}
|
||
#if O_LOCALE
|
||
if ((decimalpoint = (unsigned char *)(localeconv()->decimal_point)) ==
|
||
NULL)
|
||
#endif
|
||
decimalpoint = (const unsigned char *)".";
|
||
dp = (unsigned char *)decimalpoint;
|
||
/* translate . to current locale */
|
||
while ((dc = *dp++) != '\0') {
|
||
*sp++ = dc;
|
||
if (--max_size == 0) {
|
||
return num_send_error_message("Number Too Long");
|
||
}
|
||
}
|
||
/* numbers after . */
|
||
if (chtype(ch) == NU) {
|
||
do {
|
||
if (--max_size == 0) {
|
||
return num_send_error_message("Number Too Long");
|
||
}
|
||
*sp++ = ch;
|
||
} while (chtype(ch = getchr(inp_stream)) == NU);
|
||
}
|
||
}
|
||
if (ch == 'e' || ch == 'E') {
|
||
if (--max_size == 0) {
|
||
return num_send_error_message("Number Too Long");
|
||
}
|
||
*sp++ = ch;
|
||
ch = getchr(inp_stream);
|
||
if (ch == '-') {
|
||
if (--max_size == 0) {
|
||
return num_send_error_message("Number Too Long");
|
||
}
|
||
*sp++ = '-';
|
||
ch = getchr(inp_stream);
|
||
} else if (ch == '+') {
|
||
ch = getchr(inp_stream);
|
||
}
|
||
if (chtype(ch) != NU) {
|
||
CACHE_REGS
|
||
if (has_dot)
|
||
return float_send(s, sign);
|
||
return MkIntegerTerm(sign * val);
|
||
}
|
||
do {
|
||
if (--max_size == 0) {
|
||
return num_send_error_message("Number Too Long");
|
||
}
|
||
*sp++ = ch;
|
||
} while (chtype(ch = getchr(inp_stream)) == NU);
|
||
}
|
||
*sp = '\0';
|
||
*chp = ch;
|
||
return float_send(s, sign);
|
||
} else if (has_overflow) {
|
||
*sp = '\0';
|
||
/* skip base */
|
||
*chp = ch;
|
||
if (s[0] == '0' && s[1] == 'x')
|
||
return read_int_overflow(s + 2, 16, val, sign);
|
||
else if (s[0] == '0' && s[1] == 'o')
|
||
return read_int_overflow(s + 2, 8, val, sign);
|
||
else if (s[0] == '0' && s[1] == 'b')
|
||
return read_int_overflow(s + 2, 2, val, sign);
|
||
if (s[1] == '\'')
|
||
return read_int_overflow(s + 2, base, val, sign);
|
||
if (s[2] == '\'')
|
||
return read_int_overflow(s + 3, base, val, sign);
|
||
return read_int_overflow(s, base, val, sign);
|
||
} else {
|
||
CACHE_REGS
|
||
*chp = ch;
|
||
return MkIntegerTerm(val * sign);
|
||
}
|
||
}
|
||
|
||
/* given a function getchr scan until we either find the number
|
||
or end of file */
|
||
Term Yap_scan_num(StreamDesc *inp) {
|
||
CACHE_REGS
|
||
Term out;
|
||
int sign = 1;
|
||
int ch, cherr;
|
||
char *ptr;
|
||
|
||
LOCAL_ErrorMessage = NULL;
|
||
LOCAL_ScannerStack = (char *)TR;
|
||
LOCAL_ScannerExtraBlocks = NULL;
|
||
if (!(ptr = AllocScannerMemory(4096))) {
|
||
LOCAL_ErrorMessage = "Trail Overflow";
|
||
LOCAL_Error_TYPE = OUT_OF_TRAIL_ERROR;
|
||
return TermNil;
|
||
}
|
||
ch = getchr(inp);
|
||
while (chtype(ch) == BS) {
|
||
ch = getchr(inp);
|
||
}
|
||
if (ch == '-') {
|
||
sign = -1;
|
||
ch = getchr(inp);
|
||
} else if (ch == '+') {
|
||
ch = getchr(inp);
|
||
}
|
||
if (chtype(ch) != NU) {
|
||
Yap_clean_tokenizer(NULL, NULL, NULL);
|
||
return TermNil;
|
||
}
|
||
cherr = '\0';
|
||
if (ASP - HR < 1024)
|
||
return TermNil;
|
||
out = get_num(&ch, &cherr, inp, ptr, 4096, sign); /* */
|
||
PopScannerMemory(ptr, 4096);
|
||
Yap_clean_tokenizer(NULL, NULL, NULL);
|
||
if (LOCAL_ErrorMessage != NULL || ch != -1 || cherr)
|
||
return TermNil;
|
||
return out;
|
||
}
|
||
|
||
#define CHECK_SPACE() \
|
||
if (ASP - HR < 1024) { \
|
||
LOCAL_ErrorMessage = "Stack Overflow"; \
|
||
LOCAL_Error_TYPE = OUT_OF_STACK_ERROR; \
|
||
LOCAL_Error_Size = 0L; \
|
||
if (p) \
|
||
p->Tok = Ord(kind = eot_tok); \
|
||
/* serious error now */ \
|
||
return l; \
|
||
}
|
||
|
||
static void open_comment(int ch, StreamDesc *inp_stream USES_REGS) {
|
||
CELL *h0 = HR;
|
||
HR += 5;
|
||
h0[0] = AbsAppl(h0 + 2);
|
||
h0[1] = TermNil;
|
||
if (!LOCAL_CommentsTail) {
|
||
/* first comment */
|
||
LOCAL_Comments = AbsPair(h0);
|
||
} else {
|
||
/* extra comment */
|
||
*LOCAL_CommentsTail = AbsPair(h0);
|
||
}
|
||
LOCAL_CommentsTail = h0 + 1;
|
||
h0 += 2;
|
||
h0[0] = (CELL)FunctorMinus;
|
||
h0[1] = Yap_StreamPosition(inp_stream-GLOBAL_Stream
|
||
);
|
||
h0[2] = TermNil;
|
||
LOCAL_CommentsNextChar = h0 + 2;
|
||
LOCAL_CommentsBuff = (wchar_t *)malloc(1024 * sizeof(wchar_t));
|
||
LOCAL_CommentsBuffLim = 1024;
|
||
LOCAL_CommentsBuff[0] = ch;
|
||
LOCAL_CommentsBuffPos = 1;
|
||
}
|
||
|
||
static void extend_comment(int ch USES_REGS) {
|
||
LOCAL_CommentsBuff[LOCAL_CommentsBuffPos] = ch;
|
||
LOCAL_CommentsBuffPos++;
|
||
if (LOCAL_CommentsBuffPos == LOCAL_CommentsBuffLim - 1) {
|
||
LOCAL_CommentsBuff = (wchar_t *)realloc(
|
||
LOCAL_CommentsBuff, sizeof(wchar_t) * (LOCAL_CommentsBuffLim + 4096));
|
||
LOCAL_CommentsBuffLim += 4096;
|
||
}
|
||
}
|
||
|
||
static void close_comment(USES_REGS1) {
|
||
LOCAL_CommentsBuff[LOCAL_CommentsBuffPos] = '\0';
|
||
*LOCAL_CommentsNextChar = Yap_WCharsToString(LOCAL_CommentsBuff PASS_REGS);
|
||
free(LOCAL_CommentsBuff);
|
||
LOCAL_CommentsBuff = NULL;
|
||
LOCAL_CommentsBuffLim = 0;
|
||
}
|
||
|
||
// mark that we reached EOF,
|
||
// next token will be end_of_file)
|
||
static void
|
||
mark_eof( struct stream_desc * inp_stream )
|
||
{
|
||
inp_stream->status |= Push_Eof_Stream_f;
|
||
}
|
||
|
||
static wchar_t *ch_to_wide(char *base, char *charp) {
|
||
CACHE_REGS
|
||
int n = charp - base, i;
|
||
wchar_t *nb = (wchar_t *)base;
|
||
|
||
if ((nb + n) + 1024 > (wchar_t *)AuxSp) {
|
||
LOCAL_Error_TYPE = OUT_OF_AUXSPACE_ERROR;
|
||
LOCAL_ErrorMessage =
|
||
"Heap Overflow While Scanning: please increase code space (-h)";
|
||
return NULL;
|
||
}
|
||
for (i = n; i > 0; i--) {
|
||
nb[i - 1] = (unsigned char)base[i - 1];
|
||
}
|
||
return nb + n;
|
||
}
|
||
|
||
#define add_ch_to_buff(ch) \
|
||
if (wcharp) { \
|
||
*wcharp++ = (ch); \
|
||
if (wcharp >= (wchar_t *)AuxSp - 1024) \
|
||
goto huge_var_error; \
|
||
charp = (char *)wcharp; \
|
||
} else { \
|
||
if (ch > MAX_ISO_LATIN1 && !wcharp) { \
|
||
/* does not fit in ISO-LATIN */ \
|
||
wcharp = ch_to_wide(TokImage, charp); \
|
||
if (!wcharp) \
|
||
goto huge_var_error; \
|
||
*wcharp++ = (ch); \
|
||
charp = (char *)wcharp; \
|
||
} else { \
|
||
if (charp >= (char *)AuxSp - 1024) \
|
||
goto huge_var_error; \
|
||
*charp++ = ch; \
|
||
} \
|
||
}
|
||
|
||
#define add_ch_to_utf8_buff(ch) \
|
||
{ \
|
||
if ((ch & 0xff) == ch) { \
|
||
*charp++ = ch; \
|
||
} else { \
|
||
charp = _PL__utf8_put_char(charp, ch); \
|
||
} \
|
||
}
|
||
|
||
TokEntry *Yap_tokenizer( struct stream_desc *inp_stream,
|
||
bool store_comments, Term *tposp) {
|
||
|
||
CACHE_REGS
|
||
TokEntry *t, *l, *p;
|
||
enum TokenKinds kind;
|
||
int solo_flag = TRUE;
|
||
int ch;
|
||
wchar_t *wcharp;
|
||
struct qq_struct_t *cur_qq = NULL;
|
||
|
||
LOCAL_ErrorMessage = NULL;
|
||
LOCAL_Error_Size = 0;
|
||
LOCAL_VarTable = NULL;
|
||
LOCAL_AnonVarTable = NULL;
|
||
LOCAL_ScannerStack = (char *)TR;
|
||
LOCAL_ScannerExtraBlocks = NULL;
|
||
l = NULL;
|
||
p = NULL; /* Just to make lint happy */
|
||
ch = getchr(inp_stream);
|
||
while (chtype(ch) == BS) {
|
||
ch = getchr(inp_stream);
|
||
}
|
||
*tposp = Yap_StreamPosition(inp_stream-GLOBAL_Stream);
|
||
Yap_setCurrentSourceLocation(inp_stream);
|
||
LOCAL_StartLine = inp_stream->linecount;
|
||
do {
|
||
wchar_t och;
|
||
int quote, isvar;
|
||
char *charp, *mp;
|
||
unsigned int len;
|
||
char *TokImage = NULL;
|
||
|
||
t = (TokEntry *)AllocScannerMemory(sizeof(TokEntry));
|
||
t->TokNext = NULL;
|
||
if (t == NULL) {
|
||
LOCAL_ErrorMessage = "Trail Overflow";
|
||
LOCAL_Error_TYPE = OUT_OF_TRAIL_ERROR;
|
||
if (p)
|
||
p->Tok = Ord(kind = eot_tok);
|
||
/* serious error now */
|
||
return l;
|
||
}
|
||
if (!l)
|
||
l = t;
|
||
else
|
||
p->TokNext = t;
|
||
p = t;
|
||
restart:
|
||
while (chtype(ch) == BS) {
|
||
ch = getchr(inp_stream);
|
||
}
|
||
t->TokPos = GetCurInpPos(inp_stream);
|
||
|
||
switch (chtype(ch)) {
|
||
|
||
case CC:
|
||
if (store_comments) {
|
||
CHECK_SPACE();
|
||
open_comment(ch, inp_stream PASS_REGS);
|
||
continue_comment:
|
||
while ((ch = getchr(inp_stream)) != 10 && chtype(ch) != EF) {
|
||
CHECK_SPACE();
|
||
extend_comment(ch PASS_REGS);
|
||
}
|
||
CHECK_SPACE();
|
||
extend_comment(ch PASS_REGS);
|
||
if (chtype(ch) != EF) {
|
||
ch = getchr(inp_stream);
|
||
if (chtype(ch) == CC) {
|
||
extend_comment(ch PASS_REGS);
|
||
goto continue_comment;
|
||
}
|
||
}
|
||
close_comment(PASS_REGS1);
|
||
} else {
|
||
while ((ch = getchr(inp_stream)) != 10 && chtype(ch) != EF)
|
||
;
|
||
}
|
||
if (chtype(ch) != EF) {
|
||
/* blank space */
|
||
if (t == l) {
|
||
/* we found a comment before reading characters */
|
||
while (chtype(ch) == BS) {
|
||
ch = getchr(inp_stream);
|
||
}
|
||
CHECK_SPACE();
|
||
*tposp = Yap_StreamPosition(inp_stream-GLOBAL_Stream);
|
||
Yap_setCurrentSourceLocation(inp_stream);
|
||
}
|
||
goto restart;
|
||
} else {
|
||
t->Tok = Ord(kind = eot_tok);
|
||
mark_eof(inp_stream);
|
||
}
|
||
break;
|
||
|
||
case UC:
|
||
case UL:
|
||
case LC:
|
||
och = ch;
|
||
ch = getchr(inp_stream);
|
||
scan_name:
|
||
TokImage = ((AtomEntry *)(Yap_PreAllocCodeSpace()))->StrOfAE;
|
||
charp = TokImage;
|
||
wcharp = NULL;
|
||
isvar = (chtype(och) != LC);
|
||
add_ch_to_buff(och);
|
||
for (; chtype(ch) <= NU; ch = getchr(inp_stream)) {
|
||
if (charp == (char *)AuxSp - 1024) {
|
||
huge_var_error:
|
||
/* huge atom or variable, we are in trouble */
|
||
LOCAL_ErrorMessage = "Code Space Overflow due to huge atom";
|
||
LOCAL_Error_TYPE = OUT_OF_AUXSPACE_ERROR;
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
if (p)
|
||
p->Tok = Ord(kind = eot_tok);
|
||
/* serious error now */
|
||
return l;
|
||
}
|
||
add_ch_to_buff(ch);
|
||
}
|
||
while (ch == '\'' && isvar &&trueGlobalPrologFlag(VARIABLE_NAMES_MAY_END_WITH_QUOTES_FLAG)) {
|
||
if (charp == (char *)AuxSp - 1024) {
|
||
goto huge_var_error;
|
||
}
|
||
add_ch_to_buff(ch);
|
||
ch = getchr(inp_stream);
|
||
}
|
||
add_ch_to_buff('\0');
|
||
if (!isvar) {
|
||
Atom ae;
|
||
/* don't do this in iso */
|
||
if (wcharp) {
|
||
ae = Yap_LookupWideAtom((wchar_t *)TokImage);
|
||
} else {
|
||
ae = Yap_LookupAtom(TokImage);
|
||
}
|
||
if (ae == NIL) {
|
||
LOCAL_Error_TYPE = OUT_OF_HEAP_ERROR;
|
||
LOCAL_ErrorMessage = "Code Space Overflow";
|
||
if (p)
|
||
t->Tok = Ord(kind = eot_tok);
|
||
/* serious error now */
|
||
return l;
|
||
}
|
||
t->TokInfo = Unsigned(ae);
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
if (ch == '(')
|
||
solo_flag = FALSE;
|
||
t->Tok = Ord(kind = Name_tok);
|
||
} else {
|
||
VarEntry *ve = Yap_LookupVar(TokImage);
|
||
t->TokInfo = Unsigned(ve);
|
||
if (cur_qq) {
|
||
ve->refs++;
|
||
}
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
t->Tok = Ord(kind = Var_tok);
|
||
}
|
||
break;
|
||
|
||
case NU: {
|
||
int cherr;
|
||
int cha = ch;
|
||
char *ptr;
|
||
|
||
cherr = 0;
|
||
if (!(ptr = AllocScannerMemory(4096))) {
|
||
LOCAL_ErrorMessage = "Trail Overflow";
|
||
LOCAL_Error_TYPE = OUT_OF_TRAIL_ERROR;
|
||
if (p)
|
||
t->Tok = Ord(kind = eot_tok);
|
||
/* serious error now */
|
||
return l;
|
||
}
|
||
CHECK_SPACE();
|
||
if ((t->TokInfo = get_num(&cha, &cherr, inp_stream, ptr, 4096, 1)) ==
|
||
0L) {
|
||
if (p)
|
||
p->Tok = Ord(kind = eot_tok);
|
||
/* serious error now */
|
||
return l;
|
||
}
|
||
PopScannerMemory(ptr, 4096);
|
||
ch = cha;
|
||
if (cherr) {
|
||
TokEntry *e;
|
||
t->Tok = Number_tok;
|
||
t->TokPos = GetCurInpPos(inp_stream);
|
||
e = (TokEntry *)AllocScannerMemory(sizeof(TokEntry));
|
||
if (e == NULL) {
|
||
LOCAL_ErrorMessage = "Trail Overflow";
|
||
LOCAL_Error_TYPE = OUT_OF_TRAIL_ERROR;
|
||
if (p)
|
||
p->Tok = Ord(kind = eot_tok);
|
||
/* serious error now */
|
||
return l;
|
||
} else {
|
||
e->TokNext = NULL;
|
||
}
|
||
t->TokNext = e;
|
||
t = e;
|
||
p = e;
|
||
switch (cherr) {
|
||
case 'e':
|
||
case 'E':
|
||
och = cherr;
|
||
goto scan_name;
|
||
break;
|
||
case '=':
|
||
case '_':
|
||
/* handle error while parsing a float */
|
||
{
|
||
TokEntry *e2;
|
||
|
||
t->Tok = Ord(Var_tok);
|
||
t->TokInfo = Unsigned(Yap_LookupVar("E"));
|
||
t->TokPos = GetCurInpPos(inp_stream);
|
||
e2 = (TokEntry *)AllocScannerMemory(sizeof(TokEntry));
|
||
if (e2 == NULL) {
|
||
LOCAL_ErrorMessage = "Trail Overflow";
|
||
LOCAL_Error_TYPE = OUT_OF_TRAIL_ERROR;
|
||
if (p)
|
||
p->Tok = Ord(kind = eot_tok);
|
||
/* serious error now */
|
||
return l;
|
||
} else {
|
||
e2->TokNext = NULL;
|
||
}
|
||
t->TokNext = e2;
|
||
t = e2;
|
||
p = e2;
|
||
if (cherr == '=')
|
||
och = '+';
|
||
else
|
||
och = '-';
|
||
}
|
||
goto enter_symbol;
|
||
case '+':
|
||
case '-':
|
||
/* handle error while parsing a float */
|
||
{
|
||
TokEntry *e2;
|
||
|
||
t->Tok = Name_tok;
|
||
if (ch == '(')
|
||
solo_flag = FALSE;
|
||
t->TokInfo = Unsigned(AtomE);
|
||
t->TokPos = GetCurInpPos(inp_stream);
|
||
e2 = (TokEntry *)AllocScannerMemory(sizeof(TokEntry));
|
||
if (e2 == NULL) {
|
||
LOCAL_ErrorMessage = "Trail Overflow";
|
||
LOCAL_Error_TYPE = OUT_OF_TRAIL_ERROR;
|
||
t->Tok = Ord(kind = eot_tok);
|
||
/* serious error now */
|
||
return l;
|
||
} else {
|
||
e2->TokNext = NULL;
|
||
}
|
||
t->TokNext = e2;
|
||
t = e2;
|
||
p = e2;
|
||
}
|
||
default:
|
||
och = cherr;
|
||
goto enter_symbol;
|
||
}
|
||
} else {
|
||
t->Tok = Ord(kind = Number_tok);
|
||
}
|
||
} break;
|
||
|
||
case QT:
|
||
case DC:
|
||
quoted_string:
|
||
TokImage = ((AtomEntry *)(Yap_PreAllocCodeSpace()))->StrOfAE;
|
||
charp = TokImage;
|
||
quote = ch;
|
||
len = 0;
|
||
ch = getchrq(inp_stream);
|
||
wcharp = NULL;
|
||
|
||
while (TRUE) {
|
||
if (charp + 1024 > (char *)AuxSp) {
|
||
LOCAL_Error_TYPE = OUT_OF_AUXSPACE_ERROR;
|
||
LOCAL_ErrorMessage =
|
||
"Heap Overflow While Scanning: please increase code space (-h)";
|
||
break;
|
||
}
|
||
if (ch == 10 && trueGlobalPrologFlag(ISO_FLAG)) {
|
||
/* in ISO a new line terminates a string */
|
||
LOCAL_ErrorMessage = "layout character \n inside quotes";
|
||
break;
|
||
}
|
||
if (ch == quote) {
|
||
ch = getchrq(inp_stream);
|
||
if (ch != quote)
|
||
break;
|
||
add_ch_to_buff(ch);
|
||
ch = getchrq(inp_stream);
|
||
} else if (ch == '\\' &&
|
||
Yap_GetModuleEntry(CurrentModule)->flags & M_CHARESCAPE) {
|
||
int scan_next = TRUE;
|
||
if ((ch = read_quoted_char(&scan_next, inp_stream))) {
|
||
add_ch_to_buff(ch);
|
||
}
|
||
if (scan_next) {
|
||
ch = getchrq(inp_stream);
|
||
}
|
||
} else if (chtype(ch) == EF && ch <= MAX_ISO_LATIN1) {
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
mark_eof(inp_stream);
|
||
t->Tok = Ord(kind = eot_tok);
|
||
break;
|
||
} else {
|
||
add_ch_to_buff(ch);
|
||
ch = getchrq(inp_stream);
|
||
}
|
||
++len;
|
||
if (charp > (char *)AuxSp - 1024) {
|
||
/* Not enough space to read in the string. */
|
||
LOCAL_Error_TYPE = OUT_OF_AUXSPACE_ERROR;
|
||
LOCAL_ErrorMessage =
|
||
"not enough space to read in string or quoted atom";
|
||
/* serious error now */
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
t->Tok = Ord(kind = eot_tok);
|
||
return l;
|
||
}
|
||
}
|
||
if (wcharp) {
|
||
*wcharp = '\0';
|
||
} else {
|
||
*charp = '\0';
|
||
}
|
||
if (quote == '"') {
|
||
if (wcharp) {
|
||
mp = AllocScannerMemory(sizeof(wchar_t) * (len + 1));
|
||
} else {
|
||
mp = AllocScannerMemory(len + 1);
|
||
}
|
||
if (mp == NULL) {
|
||
LOCAL_ErrorMessage =
|
||
"not enough heap space to read in string or quoted atom";
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
t->Tok = Ord(kind = eot_tok);
|
||
return l;
|
||
}
|
||
if (wcharp) {
|
||
wcscpy((wchar_t *)mp, (wchar_t *)TokImage);
|
||
} else {
|
||
strcpy(mp, TokImage);
|
||
}
|
||
t->TokInfo = Unsigned(mp);
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
if (wcharp) {
|
||
t->Tok = Ord(kind = WString_tok);
|
||
} else {
|
||
t->Tok = Ord(kind = String_tok);
|
||
}
|
||
} else if (quote == '`') {
|
||
if (wcharp) {
|
||
mp = AllocScannerMemory( utf8_strlen1(TokImage) + 1 );
|
||
} else {
|
||
mp = AllocScannerMemory(len + 1);
|
||
}
|
||
if (mp == NULL) {
|
||
LOCAL_ErrorMessage =
|
||
"not enough heap space to read in string or quoted atom";
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
t->Tok = Ord(kind = eot_tok);
|
||
return l;
|
||
}
|
||
if (wcharp) {
|
||
wcscpy((wchar_t *)mp, (wchar_t *)TokImage);
|
||
} else {
|
||
strcpy(mp, TokImage);
|
||
}
|
||
t->TokInfo = Unsigned(mp);
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
if (wcharp) {
|
||
t->Tok = Ord(kind = WBQString_tok);
|
||
} else {
|
||
t->Tok = Ord(kind = BQString_tok);
|
||
}
|
||
} else {
|
||
if (wcharp) {
|
||
t->TokInfo = Unsigned(Yap_LookupWideAtom((wchar_t *)TokImage));
|
||
} else {
|
||
t->TokInfo = Unsigned(Yap_LookupAtom(TokImage));
|
||
}
|
||
if (!(t->TokInfo)) {
|
||
LOCAL_Error_TYPE = OUT_OF_HEAP_ERROR;
|
||
LOCAL_ErrorMessage = "Code Space Overflow";
|
||
if (p)
|
||
t->Tok = Ord(kind = eot_tok);
|
||
/* serious error now */
|
||
return l;
|
||
}
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
t->Tok = Ord(kind = Name_tok);
|
||
if (ch == '(')
|
||
solo_flag = false;
|
||
}
|
||
break;
|
||
|
||
case SY:
|
||
if (ch == '`')
|
||
goto quoted_string;
|
||
och = ch;
|
||
ch = getchr(inp_stream);
|
||
if (och == '/' && ch == '*') {
|
||
if (store_comments) {
|
||
CHECK_SPACE();
|
||
open_comment('/', inp_stream PASS_REGS);
|
||
while ((och != '*' || ch != '/') && chtype(ch) != EF) {
|
||
och = ch;
|
||
CHECK_SPACE();
|
||
extend_comment(ch PASS_REGS);
|
||
ch = getchr(inp_stream);
|
||
}
|
||
if (chtype(ch) != EF) {
|
||
CHECK_SPACE();
|
||
extend_comment(ch PASS_REGS);
|
||
}
|
||
close_comment(PASS_REGS1);
|
||
} else {
|
||
while ((och != '*' || ch != '/') && chtype(ch) != EF) {
|
||
och = ch;
|
||
ch = getchr(inp_stream);
|
||
}
|
||
}
|
||
if (chtype(ch) == EF) {
|
||
t->Tok = Ord(kind = eot_tok);
|
||
break;
|
||
} else {
|
||
/* leave comments */
|
||
ch = getchr(inp_stream);
|
||
if (t == l) {
|
||
/* we found a comment before reading characters */
|
||
while (chtype(ch) == BS) {
|
||
ch = getchr(inp_stream);
|
||
}
|
||
CHECK_SPACE();
|
||
*tposp = Yap_StreamPosition(inp_stream-GLOBAL_Stream);
|
||
Yap_setCurrentSourceLocation(inp_stream);
|
||
}
|
||
}
|
||
goto restart;
|
||
}
|
||
enter_symbol:
|
||
if (och == '.' &&
|
||
(chtype(ch) == BS || chtype(ch) == EF || chtype(ch) == CC)) {
|
||
if (chtype(ch) == CC)
|
||
while ((ch = getchr(inp_stream)) != 10 && chtype(ch) != EF)
|
||
;
|
||
t->Tok = Ord(kind = eot_tok);
|
||
if (chtype(chtype(ch)) == EF)
|
||
mark_eof(inp_stream);
|
||
break;
|
||
} else {
|
||
Atom ae;
|
||
TokImage = ((AtomEntry *)(Yap_PreAllocCodeSpace()))->StrOfAE;
|
||
charp = TokImage;
|
||
wcharp = NULL;
|
||
add_ch_to_buff(och);
|
||
for (; chtype(ch) == SY; ch = getchr(inp_stream)) {
|
||
if (charp == (char *)AuxSp - 1024) {
|
||
goto huge_var_error;
|
||
}
|
||
add_ch_to_buff(ch);
|
||
}
|
||
add_ch_to_buff('\0');
|
||
if (wcharp) {
|
||
ae = Yap_LookupWideAtom((wchar_t *)TokImage);
|
||
} else {
|
||
ae = Yap_LookupAtom(TokImage);
|
||
}
|
||
if (ae == NIL) {
|
||
LOCAL_Error_TYPE = OUT_OF_HEAP_ERROR;
|
||
LOCAL_ErrorMessage = "Code Space Overflow";
|
||
if (p)
|
||
t->Tok = Ord(kind = eot_tok);
|
||
/* serious error now */
|
||
return l;
|
||
}
|
||
t->TokInfo = Unsigned(ae);
|
||
if (t->TokInfo == (CELL)NIL) {
|
||
LOCAL_Error_TYPE = OUT_OF_HEAP_ERROR;
|
||
LOCAL_ErrorMessage = "Code Space Overflow";
|
||
if (p)
|
||
t->Tok = Ord(kind = eot_tok);
|
||
/* serious error now */
|
||
return l;
|
||
}
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
t->Tok = Ord(kind = Name_tok);
|
||
if (ch == '(')
|
||
solo_flag = FALSE;
|
||
else
|
||
solo_flag = TRUE;
|
||
}
|
||
break;
|
||
|
||
case SL: {
|
||
char chs[2];
|
||
chs[0] = ch;
|
||
chs[1] = '\0';
|
||
ch = getchr(inp_stream);
|
||
t->TokInfo = Unsigned(Yap_LookupAtom(chs));
|
||
t->Tok = Ord(kind = Name_tok);
|
||
if (ch == '(')
|
||
solo_flag = FALSE;
|
||
} break;
|
||
|
||
case BK:
|
||
och = ch;
|
||
ch = getchr(inp_stream);
|
||
t->TokInfo = och;
|
||
if (och == '(') {
|
||
while (chtype(ch) == BS) {
|
||
ch = getchr(inp_stream);
|
||
};
|
||
if (ch == ')') {
|
||
t->TokInfo = Unsigned(AtomEmptyBrackets);
|
||
t->Tok = Ord(kind = Name_tok);
|
||
ch = getchr(inp_stream);
|
||
solo_flag = FALSE;
|
||
break;
|
||
} else if (!solo_flag) {
|
||
t->TokInfo = 'l';
|
||
solo_flag = TRUE;
|
||
}
|
||
} else if (och == '[') {
|
||
while (chtype(ch) == BS) {
|
||
ch = getchr(inp_stream);
|
||
};
|
||
if (ch == ']') {
|
||
t->TokInfo = Unsigned(AtomNil);
|
||
t->Tok = Ord(kind = Name_tok);
|
||
ch = getchr(inp_stream);
|
||
solo_flag = FALSE;
|
||
break;
|
||
}
|
||
} else if (och == '{') {
|
||
if (ch == '|') {
|
||
qq_t *qq = (qq_t *)calloc(sizeof(qq_t), 1);
|
||
if (!qq) {
|
||
LOCAL_ErrorMessage = "not enough heap space to read in quasi quote";
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
t->Tok = Ord(kind = eot_tok);
|
||
return l;
|
||
}
|
||
if (cur_qq) {
|
||
LOCAL_ErrorMessage = "quasi quote in quasi quote";
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
t->Tok = Ord(kind = eot_tok);
|
||
free(qq);
|
||
return l;
|
||
} else {
|
||
cur_qq = qq;
|
||
}
|
||
t->TokInfo = (CELL)qq;
|
||
if (inp_stream->status & Seekable_Stream_f ) {
|
||
qq->start.byteno = fseek (inp_stream->file, 0, 0);
|
||
}else {
|
||
qq->start.byteno = inp_stream->charcount - 1;
|
||
}
|
||
qq->start.lineno = inp_stream->linecount;
|
||
qq->start.linepos = inp_stream->linepos - 1;
|
||
qq->start.charno = inp_stream->charcount - 1;
|
||
t->Tok = Ord(kind = QuasiQuotes_tok);
|
||
ch = getchr(inp_stream);
|
||
solo_flag = FALSE;
|
||
break;
|
||
}
|
||
while (chtype(ch) == BS) {
|
||
ch = getchr(inp_stream);
|
||
};
|
||
if (ch == '}') {
|
||
t->TokInfo = Unsigned(AtomBraces);
|
||
t->Tok = Ord(kind = Name_tok);
|
||
ch = getchr(inp_stream);
|
||
solo_flag = FALSE;
|
||
break;
|
||
}
|
||
} else if (och == '|' && ch == '|') {
|
||
qq_t *qq = cur_qq;
|
||
if (!qq) {
|
||
LOCAL_ErrorMessage = "quasi quoted's || without {|";
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
free(cur_qq);
|
||
cur_qq = NULL;
|
||
t->Tok = Ord(kind = eot_tok);
|
||
return l;
|
||
}
|
||
cur_qq = NULL;
|
||
t->TokInfo = (CELL)qq;
|
||
if (inp_stream->status & Seekable_Stream_f ) {
|
||
qq->mid.byteno = fseek (inp_stream->file, 0, 0);
|
||
}else {
|
||
qq->mid.byteno = inp_stream->charcount - 1;
|
||
}
|
||
qq->mid.lineno = inp_stream->linecount;
|
||
qq->mid.linepos = inp_stream->linepos - 1;
|
||
qq->mid.charno = inp_stream->charcount - 1;
|
||
t->Tok = Ord(kind = QuasiQuotes_tok);
|
||
ch = getchr(inp_stream);
|
||
|
||
TokImage = Yap_PreAllocCodeSpace();
|
||
if (!TokImage) {
|
||
LOCAL_ErrorMessage =
|
||
"not enough heap space to read in a quasi quoted atom";
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
t->Tok = Ord(kind = eot_tok);
|
||
return l;
|
||
}
|
||
charp = TokImage;
|
||
quote = ch;
|
||
len = 0;
|
||
ch = getchrq(inp_stream);
|
||
wcharp = NULL;
|
||
|
||
while (TRUE) {
|
||
if (ch == '|') {
|
||
ch = getchrq(inp_stream);
|
||
if (ch != '}') {
|
||
} else {
|
||
add_ch_to_utf8_buff(och);
|
||
add_ch_to_utf8_buff(ch);
|
||
/* we're done */
|
||
break;
|
||
}
|
||
} else if (chtype(ch) == EF) {
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
mark_eof(inp_stream);
|
||
t->Tok = Ord(kind = eot_tok);
|
||
break;
|
||
} else {
|
||
add_ch_to_utf8_buff(ch);
|
||
ch = getchrq(inp_stream);
|
||
}
|
||
if (charp > (char *)AuxSp - 1024) {
|
||
/* Not enough space to read in the string. */
|
||
LOCAL_Error_TYPE = OUT_OF_AUXSPACE_ERROR;
|
||
LOCAL_ErrorMessage =
|
||
"not enough space to read in string or quoted atom";
|
||
/* serious error now */
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
t->Tok = Ord(kind = eot_tok);
|
||
return l;
|
||
}
|
||
}
|
||
len = charp - TokImage;
|
||
mp = malloc(len + 1);
|
||
if (mp == NULL) {
|
||
LOCAL_ErrorMessage = "not enough heap space to read in quasi quote";
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
t->Tok = Ord(kind = eot_tok);
|
||
return l;
|
||
}
|
||
strncpy(mp, TokImage, len + 1);
|
||
qq->text = (unsigned char *)mp;
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
if (inp_stream->status & Seekable_Stream_f ) {
|
||
qq->end.byteno = fseek (inp_stream->file, 0, 0);
|
||
}else {
|
||
qq->end.byteno = inp_stream->charcount - 1;
|
||
}
|
||
qq->end.lineno = inp_stream->linecount;
|
||
qq->end.linepos = inp_stream->linepos - 1;
|
||
qq->end.charno = inp_stream->charcount - 1;
|
||
if (!(t->TokInfo)) {
|
||
LOCAL_Error_TYPE = OUT_OF_HEAP_ERROR;
|
||
LOCAL_ErrorMessage = "Code Space Overflow";
|
||
if (p)
|
||
t->Tok = Ord(kind = eot_tok);
|
||
/* serious error now */
|
||
return l;
|
||
}
|
||
Yap_ReleasePreAllocCodeSpace((CODEADDR)TokImage);
|
||
solo_flag = FALSE;
|
||
ch = getchr(inp_stream);
|
||
break;
|
||
}
|
||
t->Tok = Ord(kind = Ponctuation_tok);
|
||
break;
|
||
case EF:
|
||
mark_eof(inp_stream);
|
||
t->Tok = Ord(kind = eot_tok);
|
||
break;
|
||
|
||
default:
|
||
#if DEBUG
|
||
fprintf(stderr, "\n++++ token: wrong char type %c %d\n", ch, chtype(ch));
|
||
#endif
|
||
t->Tok = Ord(kind = eot_tok);
|
||
}
|
||
#if DEBUG
|
||
if (GLOBAL_Option[2])
|
||
fprintf(stderr, "[Token %d %ld]", Ord(kind),
|
||
(unsigned long int)t->TokInfo);
|
||
#endif
|
||
if (LOCAL_ErrorMessage) {
|
||
/* insert an error token to inform the system of what happened */
|
||
TokEntry *e = (TokEntry *)AllocScannerMemory(sizeof(TokEntry));
|
||
if (e == NULL) {
|
||
LOCAL_ErrorMessage = "Trail Overflow";
|
||
LOCAL_Error_TYPE = OUT_OF_TRAIL_ERROR;
|
||
p->Tok = Ord(kind = eot_tok);
|
||
/* serious error now */
|
||
return l;
|
||
}
|
||
p->TokNext = e;
|
||
e->Tok = Error_tok;
|
||
e->TokInfo = MkAtomTerm(Yap_LookupAtom(LOCAL_ErrorMessage));
|
||
e->TokPos = GetCurInpPos(inp_stream);
|
||
e->TokNext = NULL;
|
||
LOCAL_ErrorMessage = NULL;
|
||
p = e;
|
||
}
|
||
} while (kind != eot_tok);
|
||
return (l);
|
||
}
|
||
|
||
void Yap_clean_tokenizer(TokEntry *tokstart,
|
||
VarEntry *vartable,
|
||
VarEntry *anonvartable) {
|
||
CACHE_REGS
|
||
struct scanner_extra_alloc *ptr = LOCAL_ScannerExtraBlocks;
|
||
while (ptr) {
|
||
struct scanner_extra_alloc *next = ptr->next;
|
||
free(ptr);
|
||
ptr = next;
|
||
}
|
||
LOCAL_Comments = TermNil;
|
||
LOCAL_CommentsNextChar = LOCAL_CommentsTail = NULL;
|
||
if (LOCAL_CommentsBuff) {
|
||
free(LOCAL_CommentsBuff);
|
||
LOCAL_CommentsBuff = NULL;
|
||
}
|
||
LOCAL_CommentsBuffLim = 0;
|
||
}
|
||
|
||
/// @}
|