From 09a63accb8863a883ef8aba3a44776ac92ae5764 Mon Sep 17 00:00:00 2001 From: Jelmer Vernooij Date: Fri, 24 Oct 2008 00:06:35 +0200 Subject: Move charset library to top level. --- source4/lib/charset/iconv.c | 711 -------------------------------------------- 1 file changed, 711 deletions(-) delete mode 100644 source4/lib/charset/iconv.c (limited to 'source4/lib/charset/iconv.c') diff --git a/source4/lib/charset/iconv.c b/source4/lib/charset/iconv.c deleted file mode 100644 index 150383e7f9..0000000000 --- a/source4/lib/charset/iconv.c +++ /dev/null @@ -1,711 +0,0 @@ -/* - Unix SMB/CIFS implementation. - minimal iconv implementation - Copyright (C) Andrew Tridgell 2001 - Copyright (C) Jelmer Vernooij 2002 - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see . -*/ - -#include "includes.h" -#include "../lib/util/dlinklist.h" -#include "system/iconv.h" -#include "system/filesys.h" -#include "param/param.h" - - -/** - * @file - * - * @brief Samba wrapper/stub for iconv character set conversion. - * - * iconv is the XPG2 interface for converting between character - * encodings. This file provides a Samba wrapper around it, and also - * a simple reimplementation that is used if the system does not - * implement iconv. - * - * Samba only works with encodings that are supersets of ASCII: ascii - * characters like whitespace can be tested for directly, multibyte - * sequences start with a byte with the high bit set, and strings are - * terminated by a nul byte. - * - * Note that the only function provided by iconv is conversion between - * characters. It doesn't directly support operations like - * uppercasing or comparison. We have to convert to UTF-16LE and - * compare there. - * - * @sa Samba Developers Guide - **/ - -static size_t ascii_pull (void *,const char **, size_t *, char **, size_t *); -static size_t ascii_push (void *,const char **, size_t *, char **, size_t *); -static size_t utf8_pull (void *,const char **, size_t *, char **, size_t *); -static size_t utf8_push (void *,const char **, size_t *, char **, size_t *); -static size_t ucs2hex_pull(void *,const char **, size_t *, char **, size_t *); -static size_t ucs2hex_push(void *,const char **, size_t *, char **, size_t *); -static size_t iconv_copy (void *,const char **, size_t *, char **, size_t *); -static size_t iconv_swab (void *,const char **, size_t *, char **, size_t *); - -static const struct charset_functions builtin_functions[] = { - /* windows is closest to UTF-16 */ - {"UCS-2LE", iconv_copy, iconv_copy}, - {"UTF-16LE", iconv_copy, iconv_copy}, - {"UCS-2BE", iconv_swab, iconv_swab}, - {"UTF-16BE", iconv_swab, iconv_swab}, - - /* we include the UTF-8 alias to cope with differing locale settings */ - {"UTF8", utf8_pull, utf8_push}, - {"UTF-8", utf8_pull, utf8_push}, - {"ASCII", ascii_pull, ascii_push}, - {"UCS2-HEX", ucs2hex_pull, ucs2hex_push} -}; - -static struct charset_functions *charsets = NULL; - -bool charset_register_backend(const void *_funcs) -{ - struct charset_functions *funcs = (struct charset_functions *)memdup(_funcs,sizeof(struct charset_functions)); - struct charset_functions *c; - - /* Check whether we already have this charset... */ - for (c = charsets; c != NULL; c = c->next) { - if(!strcasecmp(c->name, funcs->name)) { - DEBUG(2, ("Duplicate charset %s, not registering\n", funcs->name)); - return false; - } - } - - funcs->next = funcs->prev = NULL; - DLIST_ADD(charsets, funcs); - return true; -} - -#ifdef HAVE_NATIVE_ICONV -/* if there was an error then reset the internal state, - this ensures that we don't have a shift state remaining for - character sets like SJIS */ -static size_t sys_iconv(void *cd, - const char **inbuf, size_t *inbytesleft, - char **outbuf, size_t *outbytesleft) -{ - size_t ret = iconv((iconv_t)cd, - discard_const_p(char *, inbuf), inbytesleft, - outbuf, outbytesleft); - if (ret == (size_t)-1) iconv(cd, NULL, NULL, NULL, NULL); - return ret; -} -#endif - -/** - * This is a simple portable iconv() implementaion. - * - * It only knows about a very small number of character sets - just - * enough that Samba works on systems that don't have iconv. - **/ -_PUBLIC_ size_t smb_iconv(smb_iconv_t cd, - const char **inbuf, size_t *inbytesleft, - char **outbuf, size_t *outbytesleft) -{ - char cvtbuf[2048]; - size_t bufsize; - - /* in many cases we can go direct */ - if (cd->direct) { - return cd->direct(cd->cd_direct, - inbuf, inbytesleft, outbuf, outbytesleft); - } - - - /* otherwise we have to do it chunks at a time */ - while (*inbytesleft > 0) { - char *bufp1 = cvtbuf; - const char *bufp2 = cvtbuf; - - bufsize = sizeof(cvtbuf); - - if (cd->pull(cd->cd_pull, - inbuf, inbytesleft, &bufp1, &bufsize) == -1 - && errno != E2BIG) return -1; - - bufsize = sizeof(cvtbuf) - bufsize; - - if (cd->push(cd->cd_push, - &bufp2, &bufsize, - outbuf, outbytesleft) == -1) return -1; - } - - return 0; -} - -static bool is_utf16(const char *name) -{ - return strcasecmp(name, "UCS-2LE") == 0 || - strcasecmp(name, "UTF-16LE") == 0; -} - - - -_PUBLIC_ smb_iconv_t smb_iconv_open_ex(TALLOC_CTX *mem_ctx, const char *tocode, - const char *fromcode, bool native_iconv) -{ - smb_iconv_t ret; - const struct charset_functions *from=NULL, *to=NULL; - int i; - - ret = (smb_iconv_t)talloc_named(mem_ctx, - sizeof(*ret), - "iconv(%s,%s)", tocode, fromcode); - if (!ret) { - errno = ENOMEM; - return (smb_iconv_t)-1; - } - memset(ret, 0, sizeof(*ret)); - - /* check for the simplest null conversion */ - if (strcmp(fromcode, tocode) == 0) { - ret->direct = iconv_copy; - return ret; - } - - for (i=0;inext) { - if (strcasecmp(from->name, fromcode) == 0) break; - } - } - - if (to == NULL) { - for (to=charsets; to; to=to->next) { - if (strcasecmp(to->name, tocode) == 0) break; - } - } - -#ifdef HAVE_NATIVE_ICONV - if ((!from || !to) && !native_iconv) { - goto failed; - } - if (!from) { - ret->pull = sys_iconv; - ret->cd_pull = iconv_open("UTF-16LE", fromcode); - if (ret->cd_pull == (iconv_t)-1) - ret->cd_pull = iconv_open("UCS-2LE", fromcode); - if (ret->cd_pull == (iconv_t)-1) goto failed; - } - - if (!to) { - ret->push = sys_iconv; - ret->cd_push = iconv_open(tocode, "UTF-16LE"); - if (ret->cd_push == (iconv_t)-1) - ret->cd_push = iconv_open(tocode, "UCS-2LE"); - if (ret->cd_push == (iconv_t)-1) goto failed; - } -#else - if (!from || !to) { - goto failed; - } -#endif - - /* check for conversion to/from ucs2 */ - if (is_utf16(fromcode) && to) { - ret->direct = to->push; - return ret; - } - if (is_utf16(tocode) && from) { - ret->direct = from->pull; - return ret; - } - -#ifdef HAVE_NATIVE_ICONV - if (is_utf16(fromcode)) { - ret->direct = sys_iconv; - ret->cd_direct = ret->cd_push; - ret->cd_push = NULL; - return ret; - } - if (is_utf16(tocode)) { - ret->direct = sys_iconv; - ret->cd_direct = ret->cd_pull; - ret->cd_pull = NULL; - return ret; - } -#endif - - /* the general case has to go via a buffer */ - if (!ret->pull) ret->pull = from->pull; - if (!ret->push) ret->push = to->push; - return ret; - -failed: - talloc_free(ret); - errno = EINVAL; - return (smb_iconv_t)-1; -} - -/* - simple iconv_open() wrapper - */ -_PUBLIC_ smb_iconv_t smb_iconv_open(const char *tocode, const char *fromcode) -{ - return smb_iconv_open_ex(NULL, tocode, fromcode, true); -} - -/* - simple iconv_close() wrapper -*/ -_PUBLIC_ int smb_iconv_close(smb_iconv_t cd) -{ -#ifdef HAVE_NATIVE_ICONV - if (cd->cd_direct) iconv_close((iconv_t)cd->cd_direct); - if (cd->cd_pull) iconv_close((iconv_t)cd->cd_pull); - if (cd->cd_push) iconv_close((iconv_t)cd->cd_push); -#endif - - talloc_free(cd); - return 0; -} - - -/********************************************************************** - the following functions implement the builtin character sets in Samba - and also the "test" character sets that are designed to test - multi-byte character set support for english users -***********************************************************************/ -static size_t ascii_pull(void *cd, const char **inbuf, size_t *inbytesleft, - char **outbuf, size_t *outbytesleft) -{ - while (*inbytesleft >= 1 && *outbytesleft >= 2) { - (*outbuf)[0] = (*inbuf)[0]; - (*outbuf)[1] = 0; - (*inbytesleft) -= 1; - (*outbytesleft) -= 2; - (*inbuf) += 1; - (*outbuf) += 2; - } - - if (*inbytesleft > 0) { - errno = E2BIG; - return -1; - } - - return 0; -} - -static size_t ascii_push(void *cd, const char **inbuf, size_t *inbytesleft, - char **outbuf, size_t *outbytesleft) -{ - int ir_count=0; - - while (*inbytesleft >= 2 && *outbytesleft >= 1) { - (*outbuf)[0] = (*inbuf)[0] & 0x7F; - if ((*inbuf)[1]) ir_count++; - (*inbytesleft) -= 2; - (*outbytesleft) -= 1; - (*inbuf) += 2; - (*outbuf) += 1; - } - - if (*inbytesleft == 1) { - errno = EINVAL; - return -1; - } - - if (*inbytesleft > 1) { - errno = E2BIG; - return -1; - } - - return ir_count; -} - - -static size_t ucs2hex_pull(void *cd, const char **inbuf, size_t *inbytesleft, - char **outbuf, size_t *outbytesleft) -{ - while (*inbytesleft >= 1 && *outbytesleft >= 2) { - uint_t v; - - if ((*inbuf)[0] != '@') { - /* seven bit ascii case */ - (*outbuf)[0] = (*inbuf)[0]; - (*outbuf)[1] = 0; - (*inbytesleft) -= 1; - (*outbytesleft) -= 2; - (*inbuf) += 1; - (*outbuf) += 2; - continue; - } - /* it's a hex character */ - if (*inbytesleft < 5) { - errno = EINVAL; - return -1; - } - - if (sscanf(&(*inbuf)[1], "%04x", &v) != 1) { - errno = EILSEQ; - return -1; - } - - (*outbuf)[0] = v&0xff; - (*outbuf)[1] = v>>8; - (*inbytesleft) -= 5; - (*outbytesleft) -= 2; - (*inbuf) += 5; - (*outbuf) += 2; - } - - if (*inbytesleft > 0) { - errno = E2BIG; - return -1; - } - - return 0; -} - -static size_t ucs2hex_push(void *cd, const char **inbuf, size_t *inbytesleft, - char **outbuf, size_t *outbytesleft) -{ - while (*inbytesleft >= 2 && *outbytesleft >= 1) { - char buf[6]; - - if ((*inbuf)[1] == 0 && - ((*inbuf)[0] & 0x80) == 0 && - (*inbuf)[0] != '@') { - (*outbuf)[0] = (*inbuf)[0]; - (*inbytesleft) -= 2; - (*outbytesleft) -= 1; - (*inbuf) += 2; - (*outbuf) += 1; - continue; - } - if (*outbytesleft < 5) { - errno = E2BIG; - return -1; - } - snprintf(buf, 6, "@%04x", SVAL(*inbuf, 0)); - memcpy(*outbuf, buf, 5); - (*inbytesleft) -= 2; - (*outbytesleft) -= 5; - (*inbuf) += 2; - (*outbuf) += 5; - } - - if (*inbytesleft == 1) { - errno = EINVAL; - return -1; - } - - if (*inbytesleft > 1) { - errno = E2BIG; - return -1; - } - - return 0; -} - -static size_t iconv_swab(void *cd, const char **inbuf, size_t *inbytesleft, - char **outbuf, size_t *outbytesleft) -{ - int n; - - n = MIN(*inbytesleft, *outbytesleft); - - swab(*inbuf, *outbuf, (n&~1)); - if (n&1) { - (*outbuf)[n-1] = 0; - } - - (*inbytesleft) -= n; - (*outbytesleft) -= n; - (*inbuf) += n; - (*outbuf) += n; - - if (*inbytesleft > 0) { - errno = E2BIG; - return -1; - } - - return 0; -} - - -static size_t iconv_copy(void *cd, const char **inbuf, size_t *inbytesleft, - char **outbuf, size_t *outbytesleft) -{ - int n; - - n = MIN(*inbytesleft, *outbytesleft); - - memmove(*outbuf, *inbuf, n); - - (*inbytesleft) -= n; - (*outbytesleft) -= n; - (*inbuf) += n; - (*outbuf) += n; - - if (*inbytesleft > 0) { - errno = E2BIG; - return -1; - } - - return 0; -} - -/* - this takes a UTF8 sequence and produces a UTF16 sequence - */ -static size_t utf8_pull(void *cd, const char **inbuf, size_t *inbytesleft, - char **outbuf, size_t *outbytesleft) -{ - size_t in_left=*inbytesleft, out_left=*outbytesleft; - const uint8_t *c = (const uint8_t *)*inbuf; - uint8_t *uc = (uint8_t *)*outbuf; - - while (in_left >= 1 && out_left >= 2) { - if ((c[0] & 0x80) == 0) { - uc[0] = c[0]; - uc[1] = 0; - c += 1; - in_left -= 1; - out_left -= 2; - uc += 2; - continue; - } - - if ((c[0] & 0xe0) == 0xc0) { - if (in_left < 2 || - (c[1] & 0xc0) != 0x80) { - errno = EILSEQ; - goto error; - } - uc[1] = (c[0]>>2) & 0x7; - uc[0] = (c[0]<<6) | (c[1]&0x3f); - c += 2; - in_left -= 2; - out_left -= 2; - uc += 2; - continue; - } - - if ((c[0] & 0xf0) == 0xe0) { - if (in_left < 3 || - (c[1] & 0xc0) != 0x80 || - (c[2] & 0xc0) != 0x80) { - errno = EILSEQ; - goto error; - } - uc[1] = ((c[0]&0xF)<<4) | ((c[1]>>2)&0xF); - uc[0] = (c[1]<<6) | (c[2]&0x3f); - c += 3; - in_left -= 3; - out_left -= 2; - uc += 2; - continue; - } - - if ((c[0] & 0xf8) == 0xf0) { - unsigned int codepoint; - if (in_left < 4 || - (c[1] & 0xc0) != 0x80 || - (c[2] & 0xc0) != 0x80 || - (c[3] & 0xc0) != 0x80) { - errno = EILSEQ; - goto error; - } - codepoint = - (c[3]&0x3f) | - ((c[2]&0x3f)<<6) | - ((c[1]&0x3f)<<12) | - ((c[0]&0x7)<<18); - if (codepoint < 0x10000) { - /* accept UTF-8 characters that are not - minimally packed, but pack the result */ - uc[0] = (codepoint & 0xFF); - uc[1] = (codepoint >> 8); - c += 4; - in_left -= 4; - out_left -= 2; - uc += 2; - continue; - } - - codepoint -= 0x10000; - - if (out_left < 4) { - errno = E2BIG; - goto error; - } - - uc[0] = (codepoint>>10) & 0xFF; - uc[1] = (codepoint>>18) | 0xd8; - uc[2] = codepoint & 0xFF; - uc[3] = ((codepoint>>8) & 0x3) | 0xdc; - c += 4; - in_left -= 4; - out_left -= 4; - uc += 4; - continue; - } - - /* we don't handle 5 byte sequences */ - errno = EINVAL; - goto error; - } - - if (in_left > 0) { - errno = E2BIG; - goto error; - } - - *inbytesleft = in_left; - *outbytesleft = out_left; - *inbuf = (const char *)c; - *outbuf = (char *)uc; - return 0; - -error: - *inbytesleft = in_left; - *outbytesleft = out_left; - *inbuf = (const char *)c; - *outbuf = (char *)uc; - return -1; -} - - -/* - this takes a UTF16 sequence and produces a UTF8 sequence - */ -static size_t utf8_push(void *cd, const char **inbuf, size_t *inbytesleft, - char **outbuf, size_t *outbytesleft) -{ - size_t in_left=*inbytesleft, out_left=*outbytesleft; - uint8_t *c = (uint8_t *)*outbuf; - const uint8_t *uc = (const uint8_t *)*inbuf; - - while (in_left >= 2 && out_left >= 1) { - unsigned int codepoint; - - if (uc[1] == 0 && !(uc[0] & 0x80)) { - /* simplest case */ - c[0] = uc[0]; - in_left -= 2; - out_left -= 1; - uc += 2; - c += 1; - continue; - } - - if ((uc[1]&0xf8) == 0) { - /* next simplest case */ - if (out_left < 2) { - errno = E2BIG; - goto error; - } - c[0] = 0xc0 | (uc[0]>>6) | (uc[1]<<2); - c[1] = 0x80 | (uc[0] & 0x3f); - in_left -= 2; - out_left -= 2; - uc += 2; - c += 2; - continue; - } - - if ((uc[1] & 0xfc) == 0xdc) { - /* its the second part of a 4 byte sequence. Illegal */ - if (in_left < 4) { - errno = EINVAL; - } else { - errno = EILSEQ; - } - goto error; - } - - if ((uc[1] & 0xfc) != 0xd8) { - codepoint = uc[0] | (uc[1]<<8); - if (out_left < 3) { - errno = E2BIG; - goto error; - } - c[0] = 0xe0 | (codepoint >> 12); - c[1] = 0x80 | ((codepoint >> 6) & 0x3f); - c[2] = 0x80 | (codepoint & 0x3f); - - in_left -= 2; - out_left -= 3; - uc += 2; - c += 3; - continue; - } - - /* its the first part of a 4 byte sequence */ - if (in_left < 4) { - errno = EINVAL; - goto error; - } - if ((uc[3] & 0xfc) != 0xdc) { - errno = EILSEQ; - goto error; - } - codepoint = 0x10000 + (uc[2] | ((uc[3] & 0x3)<<8) | - (uc[0]<<10) | ((uc[1] & 0x3)<<18)); - - if (out_left < 4) { - errno = E2BIG; - goto error; - } - c[0] = 0xf0 | (codepoint >> 18); - c[1] = 0x80 | ((codepoint >> 12) & 0x3f); - c[2] = 0x80 | ((codepoint >> 6) & 0x3f); - c[3] = 0x80 | (codepoint & 0x3f); - - in_left -= 4; - out_left -= 4; - uc += 4; - c += 4; - } - - if (in_left == 1) { - errno = EINVAL; - goto error; - } - - if (in_left > 1) { - errno = E2BIG; - goto error; - } - - *inbytesleft = in_left; - *outbytesleft = out_left; - *inbuf = (const char *)uc; - *outbuf = (char *)c; - - return 0; - -error: - *inbytesleft = in_left; - *outbytesleft = out_left; - *inbuf = (const char *)uc; - *outbuf = (char *)c; - return -1; -} - - - -- cgit