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authorMax Khon <fjoe@FreeBSD.org>2003-09-26 20:26:25 +0000
committerMax Khon <fjoe@FreeBSD.org>2003-09-26 20:26:25 +0000
commitc4f02a891fe62fe1277c89859922804ea2c27bcd (patch)
tree5e4dbdee80eebe5477ad9c5637bb6b0ee47993d5 /lib/libkiconv/quirks.c
parent3f99f14bf17021daa4b7abc71b1e12c82da27db6 (diff)
downloadsrc-test2-c4f02a891fe62fe1277c89859922804ea2c27bcd.tar.gz
src-test2-c4f02a891fe62fe1277c89859922804ea2c27bcd.zip
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+/*-
+ * 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 */