84 lines
2.7 KiB
C
84 lines
2.7 KiB
C
/*************************************************************************
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* *
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* YAP Prolog %W% %G%
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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: yapio.h *
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* Last rev: 22/1/03 *
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* mods: *
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* comments: UNICODE encoding support (based on SWI-Prolog) *
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* *
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*************************************************************************/
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#ifndef ENCODING_H
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#define ENCODING_H 1
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#if defined(_PL_STREAM_H)
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typedef IOENC encoding_t;
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#define ENC_ISO_LATIN1 ENC_ISO_LATIN_1
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#else
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typedef enum {
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ENC_OCTET = 0, /// binary files
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ENC_ISO_LATIN1 = 1, /// US+West Europe
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ENC_ISO_ASCII = 2, /// US only
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ENC_ISO_ANSI = 4, /// Who cares
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ENC_ISO_UTF8 = 8, /// Most everyone nowadays
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ENC_UTF16_BE = 16, /// People who made a mistake
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ENC_UTF16_LE = 32, /// People who made the same mistake
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ENC_ISO_UTF32_BE = 64, /// nobody
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ENC_ISO_UTF32_LE = 128, /// yes, nobody
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} encoding_t;
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/// read the initial encoding from the Operating System's environment;
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encoding_t Yap_InitialEncoding( void );
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/// read the current environment, as set by the user or as Initial
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encoding_t Yap_DefaultEncoding( void );
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void Yap_SetDefaultEncoding(encoding_t new_encoding);
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static inline const char *enc_name(encoding_t enc)
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{
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switch(enc)
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{
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case ENC_OCTET: return "octet";
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case ENC_ISO_LATIN1: return "iso_latin_1";
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case ENC_ISO_ASCII: return "ascii";
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case ENC_ISO_ANSI: return "octet";
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case ENC_ISO_UTF8: return "utf8";
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case ENC_UTF16_BE: return "utf16_be";
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case ENC_UTF16_LE: return "utf16_le";
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case ENC_ISO_UTF32_BE: return "utf32_be";
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case ENC_ISO_UTF32_LE: return "utf32_le";
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}
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}
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static inline
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encoding_t enc_id(char *s)
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{
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{
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if (!strcmp(s, "octet")) return ENC_OCTET;
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if (!strcmp(s, "iso_latin_1")) return ENC_ISO_LATIN1;
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if (!strcmp(s, "iso_ascii")) return ENC_ISO_ASCII;
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if (!strcmp(s, "iso_ansi")) return ENC_ISO_ANSI;
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if (!strcmp(s, "iso_utf8")) return ENC_ISO_UTF8;
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if (!strcmp(s, "utf16_be")) return ENC_UTF16_BE;
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if (!strcmp(s, "utf16_le")) return ENC_UTF16_LE;
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if (!strcmp(s, "utf32_be")) return ENC_ISO_UTF32_BE;
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if (!strcmp(s, "utf32_le")) return ENC_ISO_UTF32_LE;
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if (!strcmp(s, "default")) return Yap_DefaultEncoding();
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else {
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Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, 0, "bad encoding %s, should be {octet,iso_latin_1,iso_ascii,iso_ansi,iso_utf8,utf16_be,utf16_le,utf32_be,utf32_le}", s);
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return ENC_OCTET;
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}
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}
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}
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#endif
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#endif
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