+++ /dev/null
-/*
-** Copyright 2000-2003 Double Precision, Inc.
-** See COPYING for distribution information.
-**
-** $Id: unicode.c,v 1.9 2004/02/08 04:59:15 mrsam Exp $
-*/
-
-#include "unicode_config.h"
-#include "unicode.h"
-#include <string.h>
-#include <ctype.h>
-#include <stdlib.h>
-#include <errno.h>
-
-const char *unicode_default_chset()
-{
-const char *p=UNICODECHARSET;
-
- if (unicode_find(p))
- return (p);
-
- return (unicode_ISO8859_1.chset);
-}
-
-const struct unicode_info *unicode_find(const char *chset)
-{
-char *p, *q;
-int i;
-
- if (!chset) /* Default character set */
- return (&unicode_ISO8859_1);
-
- p=strdup(chset);
- if (!p)
- return (0);
-
- for (q=p; *q; q++)
- *q=toupper(*q);
-
- if (strcmp(unicode_ISO8859_1.chset, p) == 0)
- {
- free(p);
- return (&unicode_ISO8859_1);
- }
-
- for (i=0; unicode_chsetlist[i].chsetname; i++)
- if (strcmp(unicode_chsetlist[i].chsetname, p) == 0)
- {
- free(p);
- return (unicode_chsetlist[i].ptr);
- }
- free(p);
- return (0);
-}
-
-char *unicode_convert(const char *txt, const struct unicode_info *from,
- const struct unicode_info *to)
-{
- unicode_char *uc;
- char *s;
- int dummy;
-
- if (strcmp(from->chset, to->chset) == 0) /* NOOP */
- return (strdup(txt));
-
- uc=(*from->c2u)(from, txt, &dummy);
- if (!uc)
- {
- if (dummy >= 0)
- errno=EINVAL;
-
- return (0);
- }
-
- s=(*to->u2c)(to, uc, &dummy);
-
- free(uc);
-
- if (dummy >= 0)
- errno=EINVAL;
-
- return (s);
-}
-
-char *unicode_convert_fromchset(const char *txt, const char *from,
- const struct unicode_info *to)
-{
- const struct unicode_info *fromu=unicode_find(from);
-
- if (!fromu)
- {
- errno=EINVAL;
- return (0);
- }
- return (unicode_convert(txt, fromu, to));
-}
-
-/*
-** Convert being character sets, except ignore errors.
-*/
-
-struct ux_buf {
- char *buffer;
- size_t bufsize;
-} ;
-
-static int ux_alloc(struct ux_buf *p, size_t l)
-{
- char *newbuf;
-
- if (l < p->bufsize)
- return (0);
-
- l += 64;
-
- newbuf=p->buffer ? realloc(p->buffer, l):malloc(l);
-
- if (!newbuf)
- return (-1);
-
- p->buffer=newbuf;
- p->bufsize=l;
- return (0);
-}
-
-char *unicode_xconvert(const char *txt, const struct unicode_info *from,
- const struct unicode_info *to)
-{
- unicode_char *uc;
- char *s, *cur_conv;
- int dummy, dummy2;
- struct ux_buf dst_str;
-
- char *orig_str=strdup(txt);
-
- if (!orig_str)
- return (0);
-
- if (strcmp(from->chset, to->chset) == 0) /* NOOP */
- return (orig_str);
-
- dst_str.bufsize=0;
- dst_str.buffer=0;
-
- if (ux_alloc(&dst_str, strlen(txt)*2))
- {
- free(orig_str);
- return (NULL);
- }
-
- dst_str.buffer[0]=0;
-
- cur_conv=orig_str;
-
- while (*cur_conv)
- {
- size_t l;
- unicode_char *ucptr;
-
- l=strlen(cur_conv);
-
- if (from->flags & UNICODE_REPLACEABLE)
- {
- uc=(*from->c2u)(from, cur_conv, NULL);
- if (!uc)
- {
- free(orig_str);
- free(dst_str.buffer);
- return NULL;
- }
- }
- else
- uc=(*from->c2u)(from, cur_conv, &dummy);
-
- if (!uc)
- {
- char save_char;
-
- if (dummy < 0)
- {
- free(orig_str);
- free(dst_str.buffer);
- return (NULL);
- }
-
- /* Error converting original text to unicode.
- ** Back up, and convert all the characters up until
- ** the error character.
- */
-
- l=dummy;
-
- save_char=cur_conv[dummy];
-
- cur_conv[dummy]=0;
-
- uc=(*from->c2u)(from, cur_conv, &dummy2);
- cur_conv[dummy]=save_char;
-
- if (!uc)
- {
- free(orig_str);
- free(dst_str.buffer);
- return (NULL);
- }
- }
-
- /* Ok, now convert unicode to dest charset, using the same
- ** trial-and-error process.
- */
-
- ucptr=uc;
-
- while (*ucptr)
- {
- size_t cnt_done;
-
- for (cnt_done=0; ucptr[cnt_done]; cnt_done++)
- ;
-
- if (to->flags & UNICODE_REPLACEABLE)
- {
- s=(*to->u2c)(to, ucptr, NULL);
- if (!s)
- {
- free(orig_str);
- free(dst_str.buffer);
- free(uc);
- return NULL;
- }
- }
- else
- s=(*to->u2c)(to, ucptr, &dummy);
-
- if (!s)
- {
- unicode_char save_char;
-
- if (dummy < 0)
- {
- free(orig_str);
- free(dst_str.buffer);
- free(uc);
- return (NULL);
- }
-
- cnt_done=dummy;
-
- save_char=ucptr[dummy];
- ucptr[dummy]=0;
- s=(*to->u2c)(to, ucptr, &dummy2);
- ucptr[dummy]=save_char;
-
- if (!s)
- {
- free(orig_str);
- free(dst_str.buffer);
- free(uc);
- return (NULL);
- }
- }
-
- if (ux_alloc(&dst_str,
- strlen(dst_str.buffer)+strlen(s)+2))
- {
- free(s);
- free(orig_str);
- free(dst_str.buffer);
- free(uc);
- return (NULL);
- }
-
- strcat(dst_str.buffer, s);
- free(s);
- ucptr += cnt_done;
- if (*ucptr)
- {
- strcat(dst_str.buffer, ".");
- ++ucptr;
- }
- }
-
- cur_conv += l;
-
- if (*cur_conv)
- {
- char buf[2];
-
- if (ux_alloc(&dst_str, strlen(dst_str.buffer)+1))
- {
- free(orig_str);
- free(dst_str.buffer);
- free(uc);
- return (NULL);
- }
-
- buf[0]= *cur_conv++;
- buf[1]=0;
- strcat(dst_str.buffer, buf);
- }
- free(uc);
- }
-
- free(orig_str);
- return (dst_str.buffer);
-}
HCoop / hcoop / debian / courier-authlib.git / blobdiff