diogo/yap-6.3
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fix error handling in read to do what it should do.

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git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@517 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
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vsc
2002-06-05 01:22:57 +00:00
parent f19c10ca6c
commit 3a660ed7af
3 changed files with 52 additions and 20 deletions
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36
C/iopreds.c
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@@ -2836,7 +2836,7 @@ p_get_read_error_handler(void)
static Int
p_read (void)
{ /* '$read'(+Flag,?Term,?Vars) */
{ /* '$read'(+Flag,?Term,?Vars,-Err) */
Term t, v;
TokEntry *tokstart, *fast_tokenizer (void);
#if EMACS
@@ -2894,16 +2894,26 @@ p_read (void)
}
TR = old_TR;
if (parser_error_style == QUIET_ON_PARSER_ERROR) {
/* just fail */
return(FALSE);
}
if (ErrorMessage) {
Error(SYNTAX_ERROR,syntax_error(tokstart),ErrorMessage);
return(FALSE);
} else if (parser_error_style == FAIL_ON_PARSER_ERROR) {
return(FALSE);
} else if (parser_error_style == CONTINUE_ON_PARSER_ERROR) {
ErrorMessage = NULL;
/* try again */
goto repeat_cycle;
} else {
Error(SYNTAX_ERROR,syntax_error(tokstart),"SYNTAX ERROR");
return(FALSE);
Term terr = syntax_error(tokstart);
if (ErrorMessage == NULL)
ErrorMessage = "SYNTAX ERROR";
if (parser_error_style == EXCEPTION_ON_PARSER_ERROR) {
Error(SYNTAX_ERROR,terr,ErrorMessage);
return(FALSE);
} else /* FAIL ON PARSER ERROR */ {
Term t[2];
t[0] = terr;
t[1] = MkAtomTerm(LookupAtom(ErrorMessage));
return(unify(ARG4,MkApplTerm(MkFunctor(LookupAtom("error"),2),2,t)));
}
}
} else {
/* parsing succeeded */
@@ -2939,12 +2949,12 @@ p_read (void)
static Int
p_read2 (void)
{ /* '$read2'(+Flag,?Term,?Vars,+Stream) */
{ /* '$read2'(+Flag,?Term,?Vars,-Err,+Stream) */
int old_c_stream = c_input_stream;
Int out;
/* needs to change c_output_stream for write */
c_input_stream = CheckStream (ARG4, Input_Stream_f, "read/3");
c_input_stream = CheckStream (ARG5, Input_Stream_f, "read/3");
if (c_input_stream == -1) {
c_input_stream = old_c_stream;
return(FALSE);
@@ -4858,8 +4868,8 @@ InitIOPreds(void)
InitCPred ("$put_byte", 2, p_put_byte, SafePredFlag|SyncPredFlag);
InitCPred ("$set_read_error_handler", 1, p_set_read_error_handler, SafePredFlag|SyncPredFlag);
InitCPred ("$get_read_error_handler", 1, p_get_read_error_handler, SafePredFlag|SyncPredFlag);
InitCPred ("$read", 3, p_read, SyncPredFlag);
InitCPred ("$read", 4, p_read2, SyncPredFlag);
InitCPred ("$read", 4, p_read, SyncPredFlag);
InitCPred ("$read", 5, p_read2, SyncPredFlag);
InitCPred ("$set_input", 1, p_set_input, SafePredFlag|SyncPredFlag);
InitCPred ("$set_output", 1, p_set_output, SafePredFlag|SyncPredFlag);
InitCPred ("$skip", 2, p_skip, SafePredFlag|SyncPredFlag);