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Diffstat (limited to 'lib/libkiconv/quirks.c')
| -rw-r--r-- | lib/libkiconv/quirks.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/lib/libkiconv/quirks.c b/lib/libkiconv/quirks.c new file mode 100644 index 0000000..d9a80ee --- /dev/null +++ b/lib/libkiconv/quirks.c @@ -0,0 +1,192 @@ +/*- + * Copyright (c) 2003 Ryuichiro Imura + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +/* + * kiconv(3) requires shared linked, and reduce module size + * when statically linked. + */ + +#ifdef PIC + +/* + * Why do we need quirks? + * Since each vendors has their own Unicode mapping rules, + * we need some quirks until iconv(3) supports them. + * We can define Microsoft mappings here. + * + * For example, the eucJP and Unocode mapping rule is based on + * the JIS standard. Since Microsoft uses cp932 for Unicode mapping + * witch is not truly based on the JIS standard, reading a file + * system created by Microsoft Windows family using eucJP/Unicode + * mapping rule will cause a problem. That's why we define eucJP-ms here. + * The eucJP-ms has been defined by The Open Group Japan Vendor Coucil. + * + * Well, Apple Mac OS also has their own Unicode mappings, + * but we won't require these quirks here, because HFS doesn't have + * Unicode and HFS+ has decomposed Unicode which can not be + * handled by this xlat16 converter. + */ + +#include <sys/types.h> +#include <sys/iconv.h> + +#include <stdio.h> +#include <string.h> + +#include "quirks.h" + +/* + * All lists of quirk character set + */ +static struct { + int vendor; /* reserved for non MS mapping */ + const char *base_codeset, *quirk_codeset; +} quirk_list[] = { + { KICONV_VENDOR_MICSFT, "eucJP", "eucJP-ms" }, + { KICONV_VENDOR_MICSFT, "EUC-JP", "eucJP-ms" }, + { KICONV_VENDOR_MICSFT, "SJIS", "SJIS-ms" }, + { KICONV_VENDOR_MICSFT, "Shift_JIS", "SJIS-ms" }, + { KICONV_VENDOR_MICSFT, "Big5", "Big5-ms" } +}; + +/* + * The character list to replace for Japanese MS-Windows. + */ +static struct quirk_replace_list quirk_jis_cp932[] = { + { 0x00a2, 0xffe0 }, /* Cent Sign, Fullwidth Cent Sign */ + { 0x00a3, 0xffe1 }, /* Pound Sign, Fullwidth Pound Sign */ + { 0x00ac, 0xffe2 }, /* Not Sign, Fullwidth Not Sign */ + { 0x2016, 0x2225 }, /* Double Vertical Line, Parallel To */ + { 0x203e, 0x007e }, /* Overline, Tilde */ + { 0x2212, 0xff0d }, /* Minus Sign, Fullwidth Hyphenminus */ + { 0x301c, 0xff5e } /* Wave Dash, Fullwidth Tilde */ +}; + +/* + * All entries of quirks + */ +#define NumOf(n) (sizeof((n)) / sizeof((n)[0])) +static struct { + const char *quirk_codeset, *iconv_codeset, *pair_codeset; + struct quirk_replace_list (*replace_list)[]; + size_t num_of_replaces; +} quirk_table[] = { + { + "eucJP-ms", "eucJP", ENCODING_UNICODE, + (struct quirk_replace_list (*)[])&quirk_jis_cp932, + NumOf(quirk_jis_cp932) + }, + { + "SJIS-ms", "CP932", ENCODING_UNICODE, + /* XXX - quirk_replace_list should be NULL */ + (struct quirk_replace_list (*)[])&quirk_jis_cp932, + NumOf(quirk_jis_cp932) + }, + { + "Big5-ms", "CP950", ENCODING_UNICODE, + NULL, 0 + } +}; + + +const char * +kiconv_quirkcs(const char* base, int vendor) +{ + size_t i; + + /* + * We should compare codeset names ignoring case here, + * so that quirk could be used for all of the user input + * patterns. + */ + for (i = 0; i < NumOf(quirk_list); i++) + if (quirk_list[i].vendor == vendor && + strcasecmp(quirk_list[i].base_codeset, base) == 0) + return (quirk_list[i].quirk_codeset); + + return (base); +} + +/* + * Internal Functions + */ +const char * +search_quirk(const char *given_codeset, + const char *pair_codeset, + struct quirk_replace_list **replace_list, + size_t *num_of_replaces) +{ + size_t i; + + *replace_list = NULL; + *num_of_replaces = 0; + for (i = 0; i < NumOf(quirk_table); i++) + if (strcmp(quirk_table[i].quirk_codeset, given_codeset) == 0) { + if (strcmp(quirk_table[i].pair_codeset, pair_codeset) == 0) { + *replace_list = *quirk_table[i].replace_list; + *num_of_replaces = quirk_table[i].num_of_replaces; + } + return (quirk_table[i].iconv_codeset); + } + + return (given_codeset); +} + +uint16_t +quirk_vendor2unix(uint16_t c, struct quirk_replace_list *replace_list, size_t num) +{ + size_t i; + + for (i = 0; i < num; i++) + if (replace_list[i].vendor_code == c) + return (replace_list[i].standard_code); + + return (c); +} + +uint16_t +quirk_unix2vendor(uint16_t c, struct quirk_replace_list *replace_list, size_t num) +{ + size_t i; + + for (i = 0; i < num; i++) + if (replace_list[i].standard_code == c) + return (replace_list[i].vendor_code); + + return (c); +} + +#else /* statically linked */ + +const char * +kiconv_quirkcs(const char* base, int vendor) +{ + return (base); +} + +#endif /* PIC */ |
