From 0126e157b87f137fc08dc7f46f6c291b9d06ac5d Mon Sep 17 00:00:00 2001 From: Marc Espie Date: Wed, 26 May 1999 13:38:57 +0000 Subject: egcs projects compiler system Exact copy of the snapshot, except for the removal of texinfo/ gcc/ch/ libchill/ --- gnu/egcs/gcc/mbchar.c | 290 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 290 insertions(+) create mode 100644 gnu/egcs/gcc/mbchar.c (limited to 'gnu/egcs/gcc/mbchar.c') diff --git a/gnu/egcs/gcc/mbchar.c b/gnu/egcs/gcc/mbchar.c new file mode 100644 index 00000000000..a22e52b56b3 --- /dev/null +++ b/gnu/egcs/gcc/mbchar.c @@ -0,0 +1,290 @@ +/* Multibyte Character Functions. + Copyright (C) 1998 Free Software Foundation, Inc. + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +/* These functions are used to manipulate multibyte characters. */ + +/* Note regarding cross compilation: + + In general translation of multibyte characters to wide characters can + only work in a native compiler since the translation function (mbtowc) + needs to know about both the source and target character encoding. However, + this particular implementation for JIS, SJIS and EUCJP source characters + will work for any compiler with a newlib target. Other targets may also + work provided that their wchar_t implementation is 2 bytes and the encoding + leaves the source character values unchanged (except for removing the + state shifting markers). */ + +#ifdef MULTIBYTE_CHARS +#include "config.h" +#include "system.h" +#include "mbchar.h" +#include + +typedef enum +{ + ESCAPE, DOLLAR, BRACKET, AT, B, J, NUL, JIS_CHAR, OTHER, JIS_C_NUM +} JIS_CHAR_TYPE; + +typedef enum +{ + ASCII, A_ESC, A_ESC_DL, JIS, JIS_1, JIS_2, J_ESC, J_ESC_BR, + J2_ESC, J2_ESC_BR, INV, JIS_S_NUM +} JIS_STATE; + +typedef enum +{ + COPYA, COPYJ, COPYJ2, MAKE_A, MAKE_J, NOOP, EMPTY, ERROR +} JIS_ACTION; + +/***************************************************************************** + * state/action tables for processing JIS encoding + * Where possible, switches to JIS are grouped with proceding JIS characters + * and switches to ASCII are grouped with preceding JIS characters. + * Thus, maximum returned length is: + * 2 (switch to JIS) + 2 (JIS characters) + 2 (switch back to ASCII) = 6. + *****************************************************************************/ +static JIS_STATE JIS_state_table[JIS_S_NUM][JIS_C_NUM] = { +/* ESCAPE DOLLAR BRACKET AT B J NUL JIS_CHAR OTHER*/ +/*ASCII*/ { A_ESC, ASCII, ASCII, ASCII, ASCII, ASCII, ASCII,ASCII,ASCII}, +/*A_ESC*/ { ASCII, A_ESC_DL,ASCII, ASCII, ASCII, ASCII, ASCII,ASCII,ASCII}, +/*A_ESC_DL*/{ ASCII, ASCII, ASCII, JIS, JIS, ASCII, ASCII,ASCII,ASCII}, +/*JIS*/ { J_ESC, JIS_1, JIS_1, JIS_1, JIS_1, JIS_1, INV, JIS_1,INV }, +/*JIS_1*/ { INV, JIS_2, JIS_2, JIS_2, JIS_2, JIS_2, INV, JIS_2,INV }, +/*JIS_2*/ { J2_ESC,JIS, JIS, JIS, JIS, JIS, INV, JIS, JIS }, +/*J_ESC*/ { INV, INV, J_ESC_BR, INV, INV, INV, INV, INV, INV }, +/*J_ESC_BR*/{ INV, INV, INV, INV, ASCII, ASCII, INV, INV, INV }, +/*J2_ESC*/ { INV, INV, J2_ESC_BR,INV, INV, INV, INV, INV, INV }, +/*J2_ESC_BR*/{INV, INV, INV, INV, ASCII, ASCII, INV, INV, INV }, +}; + +static JIS_ACTION JIS_action_table[JIS_S_NUM][JIS_C_NUM] = { +/* ESCAPE DOLLAR BRACKET AT B J NUL JIS_CHAR OTHER */ +/*ASCII */ {NOOP, COPYA, COPYA, COPYA, COPYA, COPYA, EMPTY, COPYA, COPYA}, +/*A_ESC */ {COPYA, NOOP, COPYA, COPYA, COPYA, COPYA, COPYA, COPYA, COPYA}, +/*A_ESC_DL */{COPYA, COPYA, COPYA, MAKE_J, MAKE_J, COPYA, COPYA, COPYA, COPYA}, +/*JIS */ {NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, ERROR, NOOP, ERROR }, +/*JIS_1 */ {ERROR, NOOP, NOOP, NOOP, NOOP, NOOP, ERROR, NOOP, ERROR }, +/*JIS_2 */ {NOOP, COPYJ2,COPYJ2,COPYJ2, COPYJ2, COPYJ2,ERROR, COPYJ2,COPYJ2}, +/*J_ESC */ {ERROR, ERROR, NOOP, ERROR, ERROR, ERROR, ERROR, ERROR, ERROR }, +/*J_ESC_BR */{ERROR, ERROR, ERROR, ERROR, NOOP, NOOP, ERROR, ERROR, ERROR }, +/*J2_ESC */ {ERROR, ERROR, NOOP, ERROR, ERROR, ERROR, ERROR, ERROR, ERROR }, +/*J2_ESC_BR*/{ERROR, ERROR, ERROR, ERROR, COPYJ, COPYJ, ERROR, ERROR, ERROR }, +}; + + +char *literal_codeset = NULL; + +int +local_mbtowc (pwc, s, n) + wchar_t *pwc; + const char *s; + size_t n; +{ + static JIS_STATE save_state = ASCII; + JIS_STATE curr_state = save_state; + unsigned char *t = (unsigned char *)s; + + if (s != NULL && n == 0) + return -1; + + if (literal_codeset == NULL || strlen (literal_codeset) <= 1) + { + /* This must be the "C" locale or unknown locale -- fall thru */ + } + else if (! strcmp (literal_codeset, "C-SJIS")) + { + int char1; + if (s == NULL) + return 0; /* not state-dependent */ + char1 = *t; + if (ISSJIS1 (char1)) + { + int char2 = t[1]; + if (n <= 1) + return -1; + if (ISSJIS2 (char2)) + { + if (pwc != NULL) + *pwc = (((wchar_t)*t) << 8) + (wchar_t)(*(t+1)); + return 2; + } + return -1; + } + if (pwc != NULL) + *pwc = (wchar_t)*t; + if (*t == '\0') + return 0; + return 1; + } + else if (! strcmp (literal_codeset, "C-EUCJP")) + { + int char1; + if (s == NULL) + return 0; /* not state-dependent */ + char1 = *t; + if (ISEUCJP (char1)) + { + int char2 = t[1]; + if (n <= 1) + return -1; + if (ISEUCJP (char2)) + { + if (pwc != NULL) + *pwc = (((wchar_t)*t) << 8) + (wchar_t)(*(t+1)); + return 2; + } + return -1; + } + if (pwc != NULL) + *pwc = (wchar_t)*t; + if (*t == '\0') + return 0; + return 1; + } + else if (! strcmp (literal_codeset, "C-JIS")) + { + JIS_ACTION action; + JIS_CHAR_TYPE ch; + unsigned char *ptr; + int i, curr_ch; + + if (s == NULL) + { + save_state = ASCII; + return 1; /* state-dependent */ + } + + ptr = t; + + for (i = 0; i < n; ++i) + { + curr_ch = t[i]; + switch (curr_ch) + { + case JIS_ESC_CHAR: + ch = ESCAPE; + break; + case '$': + ch = DOLLAR; + break; + case '@': + ch = AT; + break; + case '(': + ch = BRACKET; + break; + case 'B': + ch = B; + break; + case 'J': + ch = J; + break; + case '\0': + ch = NUL; + break; + default: + if (ISJIS (curr_ch)) + ch = JIS_CHAR; + else + ch = OTHER; + } + + action = JIS_action_table[curr_state][ch]; + curr_state = JIS_state_table[curr_state][ch]; + + switch (action) + { + case NOOP: + break; + case EMPTY: + if (pwc != NULL) + *pwc = (wchar_t)0; + save_state = curr_state; + return i; + case COPYA: + if (pwc != NULL) + *pwc = (wchar_t)*ptr; + save_state = curr_state; + return (i + 1); + case COPYJ: + if (pwc != NULL) + *pwc = (((wchar_t)*ptr) << 8) + (wchar_t)(*(ptr+1)); + save_state = curr_state; + return (i + 1); + case COPYJ2: + if (pwc != NULL) + *pwc = (((wchar_t)*ptr) << 8) + (wchar_t)(*(ptr+1)); + save_state = curr_state; + return (ptr - t) + 2; + case MAKE_A: + case MAKE_J: + ptr = (char *)(t + i + 1); + break; + case ERROR: + default: + return -1; + } + } + + return -1; /* n < bytes needed */ + } + +#ifdef CROSS_COMPILE + if (s == NULL) + return 0; /* not state-dependent */ + if (pwc != NULL) + *pwc = *s; + return 1; +#else + /* This must be the "C" locale or unknown locale. */ + return mbtowc (pwc, s, n); +#endif +} + +int +local_mblen (s, n) + const char *s; + size_t n; +{ + return local_mbtowc (NULL, s, n); +} + +int +local_mb_cur_max () +{ + if (literal_codeset == NULL || strlen (literal_codeset) <= 1) + ; + else if (! strcmp (literal_codeset, "C-SJIS")) + return 2; + else if (! strcmp (literal_codeset, "C-EUCJP")) + return 2; + else if (! strcmp (literal_codeset, "C-JIS")) + return 8; /* 3 + 2 + 3 */ + +#ifdef CROSS_COMPILE + return 1; +#else + if (MB_CUR_MAX > 0) + return MB_CUR_MAX; + + return 1; /* default */ +#endif +} +#endif /* MULTIBYTE_CHARS */ -- cgit v1.2.3