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-rw-r--r--source3/lib/iconv.c346
1 files changed, 346 insertions, 0 deletions
diff --git a/source3/lib/iconv.c b/source3/lib/iconv.c
new file mode 100644
index 0000000000..a22c84997d
--- /dev/null
+++ b/source3/lib/iconv.c
@@ -0,0 +1,346 @@
+/*
+ Unix SMB/Netbios implementation.
+ Version 3.0
+ minimal iconv implementation
+ Copyright (C) Andrew Tridgell 2001
+
+ 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 2 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+static size_t ascii_pull(char **, size_t *, char **, size_t *);
+static size_t ascii_push(char **, size_t *, char **, size_t *);
+static size_t weird_pull(char **, size_t *, char **, size_t *);
+static size_t weird_push(char **, size_t *, char **, size_t *);
+static size_t iconv_copy(char **, size_t *, char **, size_t *);
+
+/*
+ for each charset we have a function that pulls from that charset to
+ a ucs2 buffer, and a function that pushes to a ucs2 buffer
+*/
+static struct {
+ char *name;
+ size_t (*pull)(char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft);
+ size_t (*push)(char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft);
+} charsets[] = {
+ {"UCS2", iconv_copy, iconv_copy},
+ {"ASCII", ascii_pull, ascii_push},
+ {"WEIRD", weird_pull, weird_push},
+ {NULL, NULL, NULL}
+};
+
+/*
+ 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
+ */
+size_t smb_iconv(smb_iconv_t cd,
+ char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft)
+{
+ char cvtbuf[2048];
+ char *bufp = cvtbuf;
+ size_t bufsize;
+
+#ifdef HAVE_NATIVE_ICONV
+ if (cd->cd) {
+ return iconv(cd->cd, inbuf, inbytesleft, outbuf, outbytesleft);
+ }
+#endif
+
+ if (!inbuf || ! *inbuf || !outbuf || ! *outbuf) return 0;
+
+ /* in most cases we can go direct */
+ if (cd->direct) {
+ return cd->direct(inbuf, inbytesleft, outbuf, outbytesleft);
+ }
+
+ /* otherwise we have to do it chunks at a time */
+ while (*inbytesleft > 0) {
+ bufp = cvtbuf;
+ bufsize = sizeof(cvtbuf);
+ if (cd->pull(inbuf, inbytesleft, &bufp, &bufsize) == -1 &&
+ errno != E2BIG) return -1;
+
+ bufp = cvtbuf;
+ bufsize = sizeof(cvtbuf) - bufsize;
+ if (cd->push(&bufp, &bufsize, outbuf, outbytesleft) == -1) return -1;
+ }
+
+ return 0;
+}
+
+/*
+ simple iconv_open() wrapper
+ */
+smb_iconv_t smb_iconv_open(const char *tocode, const char *fromcode)
+{
+ smb_iconv_t ret;
+ int from, to;
+#ifdef HAVE_NATIVE_ICONV
+ iconv_t cd = NULL;
+#endif
+
+ for (from=0; charsets[from].name; from++) {
+ if (strcasecmp(charsets[from].name, fromcode) == 0) break;
+ }
+ for (to=0; charsets[to].name; to++) {
+ if (strcasecmp(charsets[to].name, tocode) == 0) break;
+ }
+
+ if (!charsets[from].name || !charsets[to].name) {
+#ifdef HAVE_NATIVE_ICONV
+ cd = iconv_open(tocode, fromcode);
+ if (!cd)
+#endif
+ {
+ errno = EINVAL;
+ return (smb_iconv_t)-1;
+ }
+ }
+
+ ret = (smb_iconv_t)malloc(sizeof(*ret));
+ if (!ret) {
+ errno = ENOMEM;
+ return (smb_iconv_t)-1;
+ }
+ memset(ret, 0, sizeof(*ret));
+
+#ifdef HAVE_NATIVE_ICONV
+ /* see if we wil be using the native iconv */
+ if (cd) {
+ ret->cd = cd;
+ return ret;
+ }
+#endif
+
+ /* check for the simplest null conversion */
+ if (from == to) {
+ ret->direct = iconv_copy;
+ return ret;
+ }
+
+ /* check for conversion to/from ucs2 */
+ if (from == 0) {
+ ret->direct = charsets[to].push;
+ return ret;
+ }
+ if (to == 0) {
+ ret->direct = charsets[from].pull;
+ return ret;
+ }
+
+ /* the general case has to go via a buffer */
+ ret->pull = charsets[from].pull;
+ ret->push = charsets[to].push;
+ return ret;
+}
+
+/*
+ simple iconv_close() wrapper
+*/
+int smb_iconv_close (smb_iconv_t cd)
+{
+#ifdef HAVE_NATIVE_ICONV
+ if (cd->cd) {
+ iconv_close(cd->cd);
+ }
+#endif
+ memset(cd, 0, sizeof(*cd));
+ 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(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(char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft)
+{
+ int ir_count=0;
+
+ while (*inbytesleft >= 2 && *outbytesleft >= 1) {
+ (*outbuf)[0] = (*inbuf)[0];
+ 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;
+}
+
+
+/* the "weird" character set is very useful for testing multi-byte
+ support and finding bugs. Don't use on a production system!
+*/
+static struct {
+ char from;
+ char *to;
+ int len;
+} weird_table[] = {
+ {'q', "^q^", 3},
+ {'Q', "^Q^", 3},
+ {'x', "\\.q\\.", 5},
+ {'X', "\\.Z\\.", 5},
+ {0, NULL}
+};
+
+static size_t weird_pull(char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft)
+{
+ while (*inbytesleft >= 1 && *outbytesleft >= 2) {
+ int i;
+ for (i=0;weird_table[i].from;i++) {
+ if (strncmp((*inbuf),
+ weird_table[i].to,
+ weird_table[i].len) == 0) {
+ if (*inbytesleft < weird_table[i].len) {
+ DEBUG(0,("ERROR: truncated weird string\n"));
+ smb_panic(__FUNCTION__);
+
+ } else {
+ (*outbuf)[0] = weird_table[i].from;
+ (*outbuf)[1] = 0;
+ (*inbytesleft) -= weird_table[i].len;
+ (*outbytesleft) -= 2;
+ (*inbuf) += weird_table[i].len;
+ (*outbuf) += 2;
+ goto next;
+ }
+ }
+ }
+ (*outbuf)[0] = (*inbuf)[0];
+ (*outbuf)[1] = 0;
+ (*inbytesleft) -= 1;
+ (*outbytesleft) -= 2;
+ (*inbuf) += 1;
+ (*outbuf) += 2;
+ next:
+ }
+
+ if (*inbytesleft > 0) {
+ errno = E2BIG;
+ return -1;
+ }
+
+ return 0;
+}
+
+static size_t weird_push(char **inbuf, size_t *inbytesleft,
+ char **outbuf, size_t *outbytesleft)
+{
+ int ir_count=0;
+
+ while (*inbytesleft >= 2 && *outbytesleft >= 1) {
+ int i;
+ for (i=0;weird_table[i].from;i++) {
+ if ((*inbuf)[0] == weird_table[i].from &&
+ (*inbuf)[1] == 0) {
+ if (*outbytesleft < weird_table[i].len) {
+ DEBUG(0,("No room for weird character\n"));
+ smb_panic(__FUNCTION__);
+ } else {
+ memcpy(*outbuf, weird_table[i].to,
+ weird_table[i].len);
+ (*inbytesleft) -= 2;
+ (*outbytesleft) -= weird_table[i].len;
+ (*inbuf) += 2;
+ (*outbuf) += weird_table[i].len;
+ goto next;
+ }
+ }
+ }
+ (*outbuf)[0] = (*inbuf)[0];
+ if ((*inbuf)[1]) ir_count++;
+ (*inbytesleft) -= 2;
+ (*outbytesleft) -= 1;
+ (*inbuf) += 2;
+ (*outbuf) += 1;
+ next:
+ }
+
+ if (*inbytesleft == 1) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (*inbytesleft > 1) {
+ errno = E2BIG;
+ return -1;
+ }
+
+ return ir_count;
+}
+
+static size_t iconv_copy(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;
+}
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