2 Unix SMB/CIFS implementation.
3 Samba utility functions
5 Copyright (C) Andrew Tridgell 1992-2001
6 Copyright (C) Simo Sorce 2001-2002
7 Copyright (C) Martin Pool 2003
8 Copyright (C) James Peach 2005
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
26 #ifndef SAMBA_UTIL_CORE_ONLY
27 #include "charset/charset.h"
29 #include "charset_compat.h"
31 #include "substitute.h"
35 * @brief Substitute utilities.
39 Substitute a string for a pattern in another string. Make sure there is
42 This routine looks for pattern in s and replaces it with
43 insert. It may do multiple replacements or just one.
45 Any of " ; ' $ or ` in the insert string are replaced with _
46 if len==0 then the string cannot be extended. This is different from the old
47 use of len==0 which was for no length checks to be done.
50 static void string_sub2(char *s,const char *pattern, const char *insert, size_t len,
51 bool remove_unsafe_characters, bool replace_once,
52 bool allow_trailing_dollar)
57 if (!insert || !pattern || !*pattern || !s)
65 len = ls + 1; /* len is number of *bytes* */
67 while (lp <= ls && (p = strstr_m(s,pattern))) {
68 if (ls + li - lp >= len) {
69 DBG_ERR("ERROR: string overflow by "
70 "%zu in string_sub(%.50s, %zu)\n",
71 ls + li - lp + 1 - len,
77 memmove(p+li,p+lp,strlen(p+lp)+1);
83 * (as in machine accounts) */
84 if (allow_trailing_dollar && (i == li - 1 )) {
96 if ( remove_unsafe_characters ) {
98 /* yes this break should be here
99 * since we want to fall throw if
100 * not replacing unsafe chars */
116 void string_sub_once(char *s, const char *pattern,
117 const char *insert, size_t len)
119 string_sub2( s, pattern, insert, len, true, true, false );
122 void string_sub(char *s,const char *pattern, const char *insert, size_t len)
124 string_sub2( s, pattern, insert, len, true, false, false );
128 * Talloc'ed version of string_sub
130 _PUBLIC_ char *string_sub_talloc(TALLOC_CTX *mem_ctx, const char *s,
131 const char *pattern, const char *insert)
135 size_t len, alloc_len;
137 if (insert == NULL || pattern == NULL || !*pattern || s == NULL)
140 /* determine length needed */
143 for (p = strstr(s, pattern); p != NULL;
144 p = strstr(p+strlen(pattern), pattern)) {
145 len += strlen(insert) - strlen(pattern);
148 alloc_len = MAX(len, strlen(s))+1;
149 ret = talloc_array(mem_ctx, char, alloc_len);
152 strncpy(ret, s, alloc_len);
153 string_sub(ret, pattern, insert, alloc_len);
155 ret = talloc_realloc(mem_ctx, ret, char, len+1);
159 if (ret[len] != '\0') {
160 DEBUG(0,("Internal error at %s(%d): string not terminated\n",
161 __FILE__, __LINE__));
165 talloc_set_name_const(ret, ret);
171 Similar to string_sub() but allows for any character to be substituted.
173 if len==0 then the string cannot be extended. This is different from the old
174 use of len==0 which was for no length checks to be done.
177 _PUBLIC_ void all_string_sub(char *s,const char *pattern,const char *insert, size_t len)
182 if (!insert || !pattern || !s)
186 lp = strlen(pattern);
193 len = ls + 1; /* len is number of *bytes* */
195 while (lp <= ls && (p = strstr_m(s,pattern))) {
196 if (ls + li - lp >= len) {
197 DBG_ERR("ERROR: string overflow by "
198 "%zu in all_string_sub(%.50s, %zu)\n",
199 ls + li - lp + 1 - len,
205 memmove(p+li,p+lp,strlen(p+lp)+1);
207 memcpy(p, insert, li);