--- /dev/null
+/*
+ * Shift_JIS <=> Unicode translate functions.
+ * by Yu Kobayashi <mail@yukoba.jp>
+ * Modification for JIS X 0208:1997 Annex 1 implementation
+ * by Hatuka*nezumi - IKEDA Soji <nezumi@jca.apc.org>
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include "unicode.h"
+
+#define SJIS_DEBUG 0
+
+extern const unicode_char* jisx0208_to_uni_tbls[];
+extern const unsigned* uni_to_jisx0208_tbls[];
+
+static unicode_char *c2u(const struct unicode_info *u,
+ const char *sjis_str, int *err)
+{
+ unicode_char *uc=0;
+ unsigned char hi=0, lo=0;
+ int len=0;
+ int i=0;
+ int pos=0;
+
+ if(err) *err = -1;
+
+ len = strlen(sjis_str);
+ uc = (unicode_char*)malloc((len+1) * sizeof(unicode_char) *2);
+
+ if (!uc)
+ return NULL;
+
+ for(i=0; i<len;) {
+ /* 2 Characters replaced by JIS X 0201 */
+ if (sjis_str[i] == 0x5C) /* YEN SIGN */
+ {
+ uc[pos++] = (unicode_char)0x00A5;
+ i++;
+ }
+ else if (sjis_str[i] == 0x7E) /* OVERLINE */
+ {
+ uc[pos++] = (unicode_char)0x203E;
+ i++;
+ }
+ /* Other JIS X 0201 GL */
+ else if ((unsigned)sjis_str[i] < 0x80)
+ {
+ uc[pos++] = (unicode_char)sjis_str[i];
+ i++;
+ }
+ /* JIS X 0201 GR */
+ else if ((unsigned char)sjis_str[i] >= 0xa1
+ && (unsigned char)sjis_str[i] <= 0xdf)
+ {
+ lo = (unsigned char)sjis_str[i];
+
+ /* SHIFT_JIS -> JIS */
+ lo -= 0x80;
+
+ uc[pos++] = (unicode_char)(lo+(unsigned)0xff40);
+ i++;
+ }
+ /* 2 byte characters */
+ else if ((((unsigned char)sjis_str[i] >= 0x81
+ && (unsigned char)sjis_str[i] <= 0x9F)
+ || ((unsigned char)sjis_str[i] >= 0xE0
+ && (unsigned char)sjis_str[i] <= 0xEF))
+ && (((unsigned char)sjis_str[i+1] >= 0x40
+ && (unsigned char)sjis_str[i+1] <= 0x7E)
+ || ((unsigned char)sjis_str[i+1] >= 0x80
+ && (unsigned char)sjis_str[i+1] <= 0xFC)))
+ {
+ hi = (unsigned char)sjis_str[i];
+ lo = (unsigned char)sjis_str[i+1];
+
+ /* SJIS -> JIS */
+ if( lo < 0x9f ) {
+ if( hi < 0xa0 ) {
+ hi -= 0x81;
+ hi *= 2;
+ hi += 0x21;
+ } else {
+ hi -= 0xe0;
+ hi *= 2;
+ hi += 0x5f;
+ }
+ if( lo > 0x7f )
+ --lo;
+ lo -= 0x1f;
+ } else {
+ if( hi < 0xa0 ) {
+ hi -= 0x81;
+ hi *= 2;
+ hi += 0x22;
+ } else {
+ hi -= 0xe0;
+ hi *= 2;
+ hi += 0x60;
+ }
+ lo -= 0x7e;
+ }
+
+ /* JIS -> Unicode */
+ if (jisx0208_to_uni_tbls[hi-0x21] != NULL
+ && jisx0208_to_uni_tbls[hi-0x21][lo-0x21] !=
+ (unicode_char)0x003F)
+ uc[pos++] = jisx0208_to_uni_tbls[hi-0x21][lo-0x21];
+ else if (err)
+ {
+ *err = i;
+ free(uc);
+ return NULL;
+ }
+ else
+ uc[pos++] = (unicode_char)0xFFFD;
+
+ i+=2;
+ }
+ else if (err)
+ {
+ *err = i;
+ free(uc);
+ return NULL;
+ }
+ else
+ {
+ uc[pos++] = (unicode_char)0xFFFD;
+ i++;
+ }
+ }
+ uc[pos++] = 0;
+
+ return uc;
+}
+
+static char *u2c(const struct unicode_info *u,
+ const unicode_char *str, int *err)
+{
+ int i=0;
+ int pos=0;
+ int len=0;
+ char* s;
+
+ if(err) *err = -1;
+
+ while(str[len])
+ len++;
+ s = malloc((len+1)*2);
+
+ if (!s)
+ return NULL;
+
+ for(i=0; str[i]; i++) {
+ int jis_char = 0;
+ unsigned char hi=0, lo=0;
+
+ unsigned char str_i_high=str[i] >> 8;
+
+ /* SHIFT_JIS is mapped inside BMP range */
+ if (str[i] >= (unicode_char)0x10000)
+ {
+ if (err)
+ {
+ *err = i;
+ free(s);
+ return NULL;
+ }
+ s[pos++] = '?';
+ }
+ /* JIS X 0201 GL or US-ASCII */
+ else if (str[i] < (unicode_char)0x0080)
+ s[pos++] = (char)str[i];
+ /* 2 characters replaced by JIS X 0201 */
+ else if (str[i] == 0x00A5) /* YEN SIGN */
+ s[pos++] = (char)0x5C;
+ else if (str[i] == 0x203E) /* OVERLINE */
+ s[pos++] = (char)0x7E;
+ /* JIS X 0201 GR */
+ else if (str[i] >= (unicode_char)0xff61
+ && str[i] <= (unicode_char)0xff9f)
+ {
+ lo = (unsigned char)(str[i] - (unsigned)0xff40);
+ /* JIS -> SHIFT_JIS */
+ lo += 0x80;
+ s[pos++] = lo;
+ }
+ /* Not found */
+ else if (uni_to_jisx0208_tbls[str_i_high] == NULL
+ || uni_to_jisx0208_tbls[str_i_high][str[i] & 0xff] == '?')
+ {
+ if (err)
+ {
+ *err = i;
+ free(s);
+ return NULL;
+ }
+ s[pos++] = '?';
+ }
+ /* 2 byte characters */
+ else
+ {
+ jis_char = uni_to_jisx0208_tbls[str_i_high][str[i] & 0xff];
+ hi = jis_char >> 8;
+ lo = jis_char & 0xff;
+
+ /* JIS -> SJIS */
+ if( ( hi % 2 ) == 0 )
+ lo += 0x7d;
+ else
+ lo += 0x1f;
+
+ if( lo > 0x7e )
+ ++ lo;
+
+ if( hi < 0x5f ) {
+ ++hi;
+ hi /= 2;
+ hi += 0x70;
+ } else {
+ ++hi;
+ hi /= 2;
+ hi += 0xb0;
+ }
+ s[pos++] = hi;
+ s[pos++] = lo;
+ }
+ }
+ s[pos] = 0;
+
+ return s;
+}
+
+static char *toupper_func(const struct unicode_info *u,
+ const char *cp, int *ip)
+{
+ unicode_char *uc = c2u(u, cp, ip);
+ char *s;
+ size_t i;
+
+ if (!uc)
+ return (NULL);
+
+ for (i=0; uc[i] && i<10000; i++) {
+ if ((unicode_char)'a' <= uc[i] && uc[i] <= (unicode_char)'z')
+ uc[i] = uc[i] - ((unicode_char)'a' - (unicode_char)'A');
+ }
+
+ s = u2c(u, uc, NULL);
+ free(uc);
+ return (s);
+}
+
+static char *tolower_func(const struct unicode_info *u,
+ const char *cp, int *ip)
+{
+ unicode_char *uc = c2u(u, cp, ip);
+ char *s;
+ size_t i;
+
+ if (!uc)
+ return (NULL);
+
+ for (i=0; uc[i]; i++) {
+ if ((unicode_char)'A' <= uc[i] && uc[i] <= (unicode_char)'Z')
+ uc[i] = uc[i] + ((unicode_char)'a' - (unicode_char)'A');
+ }
+
+ s = u2c(u, uc, NULL);
+ free(uc);
+
+ return (s);
+}
+
+
+static char *totitle_func(const struct unicode_info *u,
+ const char *cp, int *ip)
+{
+ unicode_char *uc = c2u(u, cp, ip);
+ char *s;
+
+ if (!uc)
+ return (NULL);
+
+ /* Uh, sorry, what's "title" char? */
+ /*
+ * for (i=0; uc[i]; i++)
+ * uc[i] = unicode_tc(uc[i]);
+ */
+
+ s = u2c(u, uc, NULL);
+ free(uc);
+ return (s);
+}
+
+extern const struct unicode_info unicode_UTF8;
+
+const struct unicode_info unicode_SHIFT_JIS = {
+ "SHIFT_JIS",
+ UNICODE_MB | UNICODE_REPLACEABLE |
+ UNICODE_HEADER_BASE64 | UNICODE_BODY_BASE64,
+ c2u,
+ u2c,
+ toupper_func,
+ tolower_func,
+ totitle_func,
+ &unicode_UTF8
+};
+
HCoop / hcoop / debian / courier-authlib.git / blobdiff