Annotation of win32/gnome/gmime-x.x.x/gmime-iconv-utils.c, revision 1.1
1.1 ! paf 1: /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
! 2: /*
! 3: * Authors: Jeffrey Stedfast <fejj@ximian.com>
! 4: *
! 5: * Copyright 2002 Ximian, Inc. (www.ximian.com)
! 6: *
! 7: * This program is free software; you can redistribute it and/or modify
! 8: * it under the terms of the GNU General Public License as published by
! 9: * the Free Software Foundation; either version 2 of the License, or
! 10: * (at your option) any later version.
! 11: *
! 12: * This program is distributed in the hope that it will be useful,
! 13: * but WITHOUT ANY WARRANTY; without even the implied warranty of
! 14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
! 15: * GNU General Public License for more details.
! 16: *
! 17: * You should have received a copy of the GNU General Public License
! 18: * along with this program; if not, write to the Free Software
! 19: * Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
! 20: *
! 21: */
! 22:
! 23: #ifdef HAVE_CONFIG_H
! 24: #include <config.h>
! 25: #endif
! 26:
! 27: #include <glib.h>
! 28: #include <stdio.h>
! 29: #include <string.h>
! 30: #include <errno.h>
! 31: #include <iconv.h>
! 32:
! 33: #include "gmime-iconv-utils.h"
! 34: #include "gmime-charset.h"
! 35:
! 36:
! 37: static gboolean initialized = FALSE;
! 38:
! 39: static iconv_t utf8_to_locale;
! 40: static iconv_t locale_to_utf8;
! 41:
! 42:
! 43: static void
! 44: iconv_utils_init (void)
! 45: {
! 46: const char *utf8, *locale;
! 47:
! 48: g_mime_charset_init ();
! 49:
! 50: utf8 = g_mime_charset_name ("utf-8");
! 51: locale = g_mime_charset_name (g_mime_charset_locale_name ());
! 52:
! 53: utf8_to_locale = iconv_open (locale, utf8);
! 54: locale_to_utf8 = iconv_open (utf8, locale);
! 55:
! 56: initialized = TRUE;
! 57: }
! 58:
! 59:
! 60: /**
! 61: * g_mime_iconv_strndup:
! 62: * @cd: conversion descriptor
! 63: * @string: string in source charset
! 64: * @n: number of bytes to convert
! 65: *
! 66: * Allocates a new string buffer containing the first @n bytes of
! 67: * @string converted to the destination charset as described by the
! 68: * conversion descriptor @cd.
! 69: *
! 70: * Returns a new string buffer containing the first @n bytes of
! 71: * @string converted to the destination charset as described by the
! 72: * conversion descriptor @cd.
! 73: **/
! 74: char *
! 75: g_mime_iconv_strndup (iconv_t cd, const char *string, size_t n)
! 76: {
! 77: size_t inleft, outleft, converted = 0;
! 78: char *out, *outbuf;
! 79: const char *inbuf;
! 80: size_t outlen;
! 81:
! 82: if (cd == (iconv_t) -1)
! 83: return g_strndup (string, n);
! 84:
! 85: outlen = n * 2 + 16;
! 86: out = g_malloc (outlen + 1);
! 87:
! 88: inbuf = string;
! 89: inleft = n;
! 90:
! 91: do {
! 92: outbuf = out + converted;
! 93: outleft = outlen - converted;
! 94:
! 95: converted = iconv (cd, (char **) &inbuf, &inleft, &outbuf, &outleft);
! 96: if (converted == (size_t) -1) {
! 97: if (errno != E2BIG && errno != EINVAL)
! 98: goto fail;
! 99: }
! 100:
! 101: /*
! 102: * E2BIG There is not sufficient room at *outbuf.
! 103: *
! 104: * We just need to grow our outbuffer and try again.
! 105: */
! 106:
! 107: converted = outlen - outleft;
! 108: if (errno == E2BIG) {
! 109: outlen += inleft * 2 + 16;
! 110: out = g_realloc (out, outlen + 1);
! 111: outbuf = out + converted;
! 112: }
! 113:
! 114: } while (errno == E2BIG && inleft > 0);
! 115:
! 116: /*
! 117: * EINVAL An incomplete multibyte sequence has been encoun
! 118: * tered in the input.
! 119: *
! 120: * We'll just have to ignore it...
! 121: */
! 122:
! 123: /* flush the iconv conversion */
! 124: iconv (cd, NULL, NULL, &outbuf, &outleft);
! 125: *outbuf = '\0';
! 126:
! 127: /* reset the cd */
! 128: iconv (cd, NULL, NULL, NULL, NULL);
! 129:
! 130: return out;
! 131:
! 132: fail:
! 133:
! 134: g_warning ("g_mime_iconv_strndup: %s", g_strerror (errno));
! 135:
! 136: g_free (out);
! 137:
! 138: /* reset the cd */
! 139: iconv (cd, NULL, NULL, NULL, NULL);
! 140:
! 141: return NULL;
! 142: }
! 143:
! 144:
! 145: /**
! 146: * g_mime_iconv_strdup:
! 147: * @cd: conversion descriptor
! 148: * @string: string in source charset
! 149: *
! 150: * Allocates a new string buffer containing @string converted to
! 151: * the destination charset described in @cd.
! 152: *
! 153: * Returns a new string buffer containing the original string
! 154: * converted to the new charset.
! 155: **/
! 156: char *
! 157: g_mime_iconv_strdup (iconv_t cd, const char *string)
! 158: {
! 159: return g_mime_iconv_strndup (cd, string, strlen (string));
! 160: }
! 161:
! 162:
! 163: /**
! 164: * g_mime_iconv_locale_to_utf8:
! 165: * @string: string in locale charset
! 166: *
! 167: * Allocates a new string buffer containing @string in UTF-8.
! 168: *
! 169: * Returns a new string buffer containing @string converted to UTF-8.
! 170: **/
! 171: char *
! 172: g_mime_iconv_locale_to_utf8 (const char *string)
! 173: {
! 174: if (!initialized)
! 175: iconv_utils_init ();
! 176:
! 177: return g_mime_iconv_strdup (locale_to_utf8, string);
! 178: }
! 179:
! 180:
! 181: /**
! 182: * g_mime_iconv_locale_to_utf8_length:
! 183: * @string: string in locale charset
! 184: * @n: number of bytes to convert
! 185: *
! 186: * Allocates a new string buffer containing the first @n bytes of
! 187: * @string converted to UTF-8.
! 188: *
! 189: * Returns a new string buffer containing the first @n bytes of
! 190: * @string converted to UTF-8.
! 191: **/
! 192: char *
! 193: g_mime_iconv_locale_to_utf8_length (const char *string, size_t n)
! 194: {
! 195: if (!initialized)
! 196: iconv_utils_init ();
! 197:
! 198: return g_mime_iconv_strndup (locale_to_utf8, string, n);
! 199: }
! 200:
! 201:
! 202: /**
! 203: * g_mime_iconv_utf8_to_locale:
! 204: * @string: string in UTF-8 charset
! 205: *
! 206: * Allocates a new string buffer containing @string converted to the
! 207: * user's locale charset.
! 208: *
! 209: * Returns a new string buffer containing @string converted to the
! 210: * user's locale charset.
! 211: **/
! 212: char *
! 213: g_mime_iconv_utf8_to_locale (const char *string)
! 214: {
! 215: if (!initialized)
! 216: iconv_utils_init ();
! 217:
! 218: return g_mime_iconv_strdup (utf8_to_locale, string);
! 219: }
! 220:
! 221:
! 222: /**
! 223: * g_mime_iconv_utf8_to_locale_length:
! 224: * @string: string in UTF-8 charset
! 225: * @n: number of bytes to convert
! 226: *
! 227: * Allocates a new string buffer containing the first @n bytes of
! 228: * @string converted to the user's locale charset.
! 229: *
! 230: * Returns a new string buffer containing the first @n bytes of
! 231: * @string converted to the user's locale charset.
! 232: **/
! 233: char *
! 234: g_mime_iconv_utf8_to_locale_length (const char *string, size_t n)
! 235: {
! 236: if (!initialized)
! 237: iconv_utils_init ();
! 238:
! 239: return g_mime_iconv_strndup (utf8_to_locale, string, n);
! 240: }
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