/***************************************************************************** * * $Id$ * Purpose ...............: Characterset functions * ***************************************************************************** * Copyright (C) 1997-2004 * * Michiel Broek FIDO: 2:280/2802 * Beekmansbos 10 * 1971 BV IJmuiden * the Netherlands * * This file is part of MBSE BBS. * * This BBS 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. * * MBSE BBS 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 MBSE BBS; see the file COPYING. If not, write to the Free * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. *****************************************************************************/ #include "../config.h" #include "mbselib.h" #define BUF_APPEND(d,s) str_append(d,sizeof(d),s) /* * Alias linked list */ static CharsetAlias *charset_alias_list = NULL; static CharsetAlias *charset_alias_last = NULL; /* * Table linked list */ static CharsetTable *charset_table_list = NULL; static CharsetTable *charset_table_last = NULL; /* * Current charset mapping table */ static CharsetTable *charset_table_used = NULL; /* * str_printf(): wrapper for sprintf()/snprintf() */ int str_printf(char *buf, size_t len, const char *fmt, ...) { va_list args; int n; va_start(args, fmt); n = vsprintf(buf, fmt, args); if (n >= len) { WriteError("Internal error - str_printf() buf overflow"); /**NOT REACHED**/ return FALSE; } /* * Make sure that buf[] is terminated with a \0. vsnprintf() * should do this automatically as required by the ANSI C99 * proposal, but one never knows ... see also discussion on * BugTraq */ buf[len - 1] = 0; va_end(args); return n; } char *str_append(char *d, size_t n, char *s) { int max = n - strlen(d) - 1; strncat(d, s, max); d[n-1] = 0; return d; } char *str_copy(char *d, size_t n, char *s) { strncpy(d, s, n); d[n-1] = 0; return d; } #define BUF_COPY(d,s) str_copy (d,sizeof(d),s) char *getchrs(int val) { switch (val) { case FTNC_NONE: return (char *)"Undefined"; case FTNC_CP437: return (char *)"CP437 2"; case FTNC_CP850: return (char *)"CP850 2"; case FTNC_CP865: return (char *)"CP865 2"; case FTNC_CP866: return (char *)"CP866 2"; case FTNC_CP852: return (char *)"CP852 2"; case FTNC_CP895: return (char *)"CP895 2"; case FTNC_LATIN_1: return (char *)"LATIN-1 2"; case FTNC_LATIN_2: return (char *)"LATIN-2 2"; case FTNC_LATIN_5: return (char *)"LATIN-5 2"; case FTNC_MAC: return (char *)"MAC 2"; case FTNC_KOI8_R: return (char *)"KOI8-R 2"; case FTNC_CP936: return (char *)"CP936 2"; default: return (char *)"LATIN-1 2"; } } /* * Experimental table that should translate from the user selected * charset to a locale. This is not the right way to do, the best * thing is to store each bbs users locale instead and then lookup * his characterset using standard library calls. * * This is one of the things the bbs world never saw coming, in the * "good" old days bbses were almost allways called local. Thanks * to the internet bbs users are now all over the world. */ char *getlocale(int val) { switch (val) { case FTNC_NONE: return (char *)"C"; case FTNC_CP437: return (char *)"en_US"; case FTNC_CP850: return (char *)"en_US"; case FTNC_CP865: return (char *)"sv_SE"; case FTNC_CP866: return (char *)"ru_RU"; case FTNC_CP852: return (char *)"cs_CZ"; case FTNC_CP895: return (char *)"cs_CZ"; case FTNC_LATIN_1: return (char *)"en_US"; case FTNC_LATIN_2: return (char *)"cs_CZ"; case FTNC_MAC: return (char *)"en_US"; case FTNC_KOI8_R: return (char *)"ru_RU.koi8r"; case FTNC_CP936: return (char *)"zh_CN.gbk"; default: return (char *)"C"; } } char *getchrsdesc(int val) { switch (val) { case FTNC_NONE: return (char *)"Undefined"; case FTNC_CP437: return (char *)"IBM codepage 437 (Western European) (ANSI terminal)"; case FTNC_CP850: return (char *)"IBM codepage 850 (Latin-1)"; case FTNC_CP865: return (char *)"IBM codepage 865 (Nordic)"; case FTNC_CP866: return (char *)"IBM codepage 866 (Russian)"; case FTNC_CP852: return (char *)"IBM codepage 852 (Czech, Latin-1)"; case FTNC_CP895: return (char *)"IBM codepage 895 (Czech, Kamenicky)"; case FTNC_LATIN_1: return (char *)"ISO 8859-1 (Western European)"; case FTNC_LATIN_2: return (char *)"ISO 8859-2 (Eastern European)"; case FTNC_LATIN_5: return (char *)"ISO 8859-5 (Turkish)"; case FTNC_MAC: return (char *)"MacIntosh character set"; case FTNC_KOI8_R: return (char *)"Unix codepage KOI8-R (Russian)"; case FTNC_CP936: return (char *)"IBM codepage 936 (Chinese, GBK)"; default: return (char *)"ERROR"; } } /* * Alloc new CharsetTable and put into linked list */ CharsetTable *charset_table_new(void) { CharsetTable *p; /* Alloc and clear */ p = (CharsetTable *)xmalloc(sizeof(CharsetTable)); memset(p, 0, sizeof(CharsetTable)); p->next = NULL; /* Just to be sure */ /* Put into linked list */ if(charset_table_list) charset_table_last->next = p; else charset_table_list = p; charset_table_last = p; return p; } /* * Alloc new CharsetAlias and put into linked list */ CharsetAlias *charset_alias_new(void) { CharsetAlias *p; /* Alloc and clear */ p = (CharsetAlias *)xmalloc(sizeof(CharsetAlias)); memset(p, 0, sizeof(CharsetAlias)); p->next = NULL; /* Just to be sure */ /* Put into linked list */ if(charset_alias_list) charset_alias_last->next = p; else charset_alias_list = p; charset_alias_last = p; return p; } /* * Write binary mapping file */ int charset_write_bin(char *name) { FILE *fp; CharsetTable *pt; CharsetAlias *pa; fp = fopen(name, "w+"); if (!fp) return FALSE; /* * Write aliases */ for (pa = charset_alias_list; pa; pa=pa->next) { fputc(CHARSET_FILE_ALIAS, fp); fwrite(pa, sizeof(CharsetAlias), 1, fp); if (ferror(fp)) { fclose(fp); return FALSE; } } /* * Write tables */ for(pt = charset_table_list; pt; pt=pt->next) { fputc(CHARSET_FILE_TABLE, fp); fwrite(pt, sizeof(CharsetTable), 1, fp); if (ferror(fp)) { fclose(fp); return FALSE; } } fclose(fp); return TRUE; } /* * Read binary mapping file */ int charset_read_bin(void) { FILE *fp; int c, n; CharsetTable *pt; CharsetAlias *pa; char *name; name = calloc(PATH_MAX, sizeof(char)); sprintf(name, "%s/etc/charset.bin", getenv("MBSE_ROOT")); if ((fp = fopen(name, "r")) == NULL) { WriteError("$Can't open %s", name); free(name); return FALSE; } free(name); while ((c = fgetc(fp)) != EOF) { switch(c) { case CHARSET_FILE_ALIAS: pa = charset_alias_new(); n = fread((void *)pa, sizeof(CharsetAlias), 1, fp); pa->next = NULL; /* overwritten by fread() */ if (n != 1) return FALSE; // Syslog('s', "read charset alias: %s -> %s", pa->alias, pa->name); break; case CHARSET_FILE_TABLE: pt = charset_table_new(); n = fread((void *)pt, sizeof(CharsetTable), 1, fp); pt->next = NULL; /* overwritten by fread() */ if (n != 1) return FALSE; Syslog('s', "read charset table: %s -> %s", pt->in, pt->out); break; default: return FALSE; break; } } if(ferror(fp)) return FALSE; fclose(fp); return TRUE; } /* * Convert to MIME quoted-printable =XX if qp==TRUE */ char *charset_qpen(int c, int qp) { static char buf[4]; c &= 0xff; if (qp && (c == '=' || c >= 0x80)) str_printf(buf, sizeof(buf), "=%02.2X", c & 0xff); else { buf[0] = c; buf[1] = 0; } return buf; } /* * Map single character */ char *charset_map_c(int c, int qp) { static char buf[MAX_CHARSET_OUT * 4]; char *s; c &= 0xff; buf[0] = 0; if (charset_table_used && c>=0x80) { s = charset_table_used->map[c - 0x80]; while(*s) BUF_APPEND(buf, charset_qpen(*s++, qp)); } else { BUF_COPY(buf, charset_qpen(c, qp)); } return buf; } /* * Search alias */ char *charset_alias_fsc(char *name) { CharsetAlias *pa; /* * Search for aliases */ for (pa = charset_alias_list; pa; pa=pa->next) { if (strcasecmp(pa->name, name) == 0) return pa->alias; } return name; } char *charset_alias_rfc(char *name) { CharsetAlias *pa; /* * Search for aliases */ for (pa = charset_alias_list; pa; pa=pa->next) { if (strcasecmp(pa->alias, name) == 0) return pa->name; } return name; } /* * Set character mapping table */ int charset_set_in_out(char *in, char *out) { CharsetTable *pt; CharsetAlias *pa; int i; if (!in || !out) return FALSE; /* * Check if charset.bin is loaded. */ if ((charset_alias_list == NULL) || (charset_table_list == NULL)) charset_read_bin(); /* * For charset names with a space (level number), shorten the name. */ for (i = 0; i < strlen(in); i++) if (in[i] == ' ') { in[i] = '\0'; break; } for (i = 0; i < strlen(out); i++) if (out[i] == ' ') { out[i] = '\0'; break; } /* Search for aliases */ for (pa = charset_alias_list; pa; pa=pa->next) { if (strcasecmp(pa->alias, in) == 0) in = pa->name; if (strcasecmp(pa->alias, out) == 0) out = pa->name; } /* Search for matching table */ for (pt = charset_table_list; pt; pt=pt->next) { if ((strcasecmp(pt->in, in) == 0) && (strcasecmp(pt->out, out) == 0)) { Syslog('s', "charset: table found in=%s out=%s", pt->in, pt->out); charset_table_used = pt; return TRUE; } } Syslog('s', "charset: no table found in=%s out=%s", in, out); charset_table_used = NULL; return FALSE; }