Commit | Line | Data |
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252b5132 | 1 | /* Concatenate variable number of strings. |
d4d868a2 | 2 | Copyright (C) 1991, 1994, 2001, 2011 Free Software Foundation, Inc. |
252b5132 RH |
3 | Written by Fred Fish @ Cygnus Support |
4 | ||
5 | This file is part of the libiberty library. | |
6 | Libiberty is free software; you can redistribute it and/or | |
7 | modify it under the terms of the GNU Library General Public | |
8 | License as published by the Free Software Foundation; either | |
9 | version 2 of the License, or (at your option) any later version. | |
10 | ||
11 | Libiberty is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Library General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Library General Public | |
17 | License along with libiberty; see the file COPYING.LIB. If | |
979c05d3 NC |
18 | not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
19 | Boston, MA 02110-1301, USA. */ | |
252b5132 RH |
20 | |
21 | ||
22 | /* | |
23 | ||
d4d868a2 RW |
24 | @deftypefn Extension char* concat (const char *@var{s1}, const char *@var{s2}, @ |
25 | @dots{}, @code{NULL}) | |
252b5132 | 26 | |
ba19b94f | 27 | Concatenate zero or more of strings and return the result in freshly |
689a1abf | 28 | @code{xmalloc}ed memory. The argument list is terminated by the first |
29 | @code{NULL} pointer encountered. Pointers to empty strings are ignored. | |
252b5132 | 30 | |
ba19b94f | 31 | @end deftypefn |
252b5132 | 32 | |
252b5132 RH |
33 | */ |
34 | ||
35 | ||
65a4f13c DD |
36 | #ifdef HAVE_CONFIG_H |
37 | #include "config.h" | |
38 | #endif | |
252b5132 RH |
39 | #include "ansidecl.h" |
40 | #include "libiberty.h" | |
926150e2 | 41 | #include <sys/types.h> /* size_t */ |
252b5132 | 42 | |
252b5132 | 43 | #include <stdarg.h> |
252b5132 | 44 | |
d42dae6c DD |
45 | # if HAVE_STRING_H |
46 | # include <string.h> | |
47 | # else | |
48 | # if HAVE_STRINGS_H | |
49 | # include <strings.h> | |
50 | # endif | |
51 | # endif | |
252b5132 | 52 | |
916aaa12 DD |
53 | #if HAVE_STDLIB_H |
54 | #include <stdlib.h> | |
55 | #endif | |
56 | ||
9334f9c6 | 57 | static inline unsigned long vconcat_length (const char *, va_list); |
54c20242 | 58 | static inline unsigned long |
9334f9c6 | 59 | vconcat_length (const char *first, va_list args) |
252b5132 | 60 | { |
54c20242 DD |
61 | unsigned long length = 0; |
62 | const char *arg; | |
252b5132 | 63 | |
d42dae6c DD |
64 | for (arg = first; arg ; arg = va_arg (args, const char *)) |
65 | length += strlen (arg); | |
66 | ||
54c20242 DD |
67 | return length; |
68 | } | |
252b5132 | 69 | |
54c20242 | 70 | static inline char * |
9334f9c6 | 71 | vconcat_copy (char *dst, const char *first, va_list args) |
54c20242 DD |
72 | { |
73 | char *end = dst; | |
74 | const char *arg; | |
d42dae6c | 75 | |
d42dae6c DD |
76 | for (arg = first; arg ; arg = va_arg (args, const char *)) |
77 | { | |
54c20242 | 78 | unsigned long length = strlen (arg); |
d42dae6c DD |
79 | memcpy (end, arg, length); |
80 | end += length; | |
252b5132 | 81 | } |
d42dae6c | 82 | *end = '\000'; |
54c20242 DD |
83 | |
84 | return dst; | |
85 | } | |
86 | ||
ba19b94f DD |
87 | /* @undocumented concat_length */ |
88 | ||
54c20242 | 89 | unsigned long |
9334f9c6 | 90 | concat_length (const char *first, ...) |
54c20242 DD |
91 | { |
92 | unsigned long length; | |
93 | ||
94 | VA_OPEN (args, first); | |
95 | VA_FIXEDARG (args, const char *, first); | |
96 | length = vconcat_length (first, args); | |
97 | VA_CLOSE (args); | |
98 | ||
99 | return length; | |
100 | } | |
101 | ||
ba19b94f DD |
102 | /* @undocumented concat_copy */ |
103 | ||
54c20242 | 104 | char * |
9334f9c6 | 105 | concat_copy (char *dst, const char *first, ...) |
54c20242 DD |
106 | { |
107 | char *save_dst; | |
108 | ||
109 | VA_OPEN (args, first); | |
110 | VA_FIXEDARG (args, char *, dst); | |
111 | VA_FIXEDARG (args, const char *, first); | |
112 | vconcat_copy (dst, first, args); | |
113 | save_dst = dst; /* With K&R C, dst goes out of scope here. */ | |
114 | VA_CLOSE (args); | |
115 | ||
116 | return save_dst; | |
117 | } | |
118 | ||
abf6a75b DD |
119 | #ifdef __cplusplus |
120 | extern "C" { | |
121 | #endif /* __cplusplus */ | |
54c20242 | 122 | char *libiberty_concat_ptr; |
abf6a75b DD |
123 | #ifdef __cplusplus |
124 | } | |
125 | #endif /* __cplusplus */ | |
54c20242 | 126 | |
ba19b94f DD |
127 | /* @undocumented concat_copy2 */ |
128 | ||
54c20242 | 129 | char * |
9334f9c6 | 130 | concat_copy2 (const char *first, ...) |
54c20242 DD |
131 | { |
132 | VA_OPEN (args, first); | |
133 | VA_FIXEDARG (args, const char *, first); | |
134 | vconcat_copy (libiberty_concat_ptr, first, args); | |
135 | VA_CLOSE (args); | |
136 | ||
137 | return libiberty_concat_ptr; | |
138 | } | |
139 | ||
140 | char * | |
9334f9c6 | 141 | concat (const char *first, ...) |
54c20242 DD |
142 | { |
143 | char *newstr; | |
144 | ||
145 | /* First compute the size of the result and get sufficient memory. */ | |
146 | VA_OPEN (args, first); | |
147 | VA_FIXEDARG (args, const char *, first); | |
abf6a75b | 148 | newstr = XNEWVEC (char, vconcat_length (first, args) + 1); |
54c20242 DD |
149 | VA_CLOSE (args); |
150 | ||
151 | /* Now copy the individual pieces to the result string. */ | |
152 | VA_OPEN (args, first); | |
153 | VA_FIXEDARG (args, const char *, first); | |
154 | vconcat_copy (newstr, first, args); | |
8a423cb3 | 155 | VA_CLOSE (args); |
252b5132 | 156 | |
d42dae6c | 157 | return newstr; |
252b5132 RH |
158 | } |
159 | ||
ba19b94f DD |
160 | /* |
161 | ||
d4d868a2 RW |
162 | @deftypefn Extension char* reconcat (char *@var{optr}, const char *@var{s1}, @ |
163 | @dots{}, @code{NULL}) | |
ba19b94f DD |
164 | |
165 | Same as @code{concat}, except that if @var{optr} is not @code{NULL} it | |
166 | is freed after the string is created. This is intended to be useful | |
167 | when you're extending an existing string or building up a string in a | |
168 | loop: | |
169 | ||
170 | @example | |
171 | str = reconcat (str, "pre-", str, NULL); | |
172 | @end example | |
173 | ||
174 | @end deftypefn | |
175 | ||
176 | */ | |
177 | ||
99ee3a8f | 178 | char * |
9334f9c6 | 179 | reconcat (char *optr, const char *first, ...) |
99ee3a8f DD |
180 | { |
181 | char *newstr; | |
182 | ||
183 | /* First compute the size of the result and get sufficient memory. */ | |
184 | VA_OPEN (args, first); | |
185 | VA_FIXEDARG (args, char *, optr); | |
186 | VA_FIXEDARG (args, const char *, first); | |
abf6a75b | 187 | newstr = XNEWVEC (char, vconcat_length (first, args) + 1); |
99ee3a8f DD |
188 | VA_CLOSE (args); |
189 | ||
190 | /* Now copy the individual pieces to the result string. */ | |
191 | VA_OPEN (args, first); | |
192 | VA_FIXEDARG (args, char *, optr); | |
193 | VA_FIXEDARG (args, const char *, first); | |
194 | vconcat_copy (newstr, first, args); | |
66c94e19 | 195 | if (optr) /* Done before VA_CLOSE so optr stays in scope for K&R C. */ |
99ee3a8f | 196 | free (optr); |
66c94e19 | 197 | VA_CLOSE (args); |
99ee3a8f DD |
198 | |
199 | return newstr; | |
200 | } | |
201 | ||
252b5132 | 202 | #ifdef MAIN |
d42dae6c | 203 | #define NULLP (char *)0 |
252b5132 RH |
204 | |
205 | /* Simple little test driver. */ | |
206 | ||
207 | #include <stdio.h> | |
208 | ||
209 | int | |
9334f9c6 | 210 | main (void) |
252b5132 RH |
211 | { |
212 | printf ("\"\" = \"%s\"\n", concat (NULLP)); | |
213 | printf ("\"a\" = \"%s\"\n", concat ("a", NULLP)); | |
214 | printf ("\"ab\" = \"%s\"\n", concat ("a", "b", NULLP)); | |
215 | printf ("\"abc\" = \"%s\"\n", concat ("a", "b", "c", NULLP)); | |
216 | printf ("\"abcd\" = \"%s\"\n", concat ("ab", "cd", NULLP)); | |
217 | printf ("\"abcde\" = \"%s\"\n", concat ("ab", "c", "de", NULLP)); | |
218 | printf ("\"abcdef\" = \"%s\"\n", concat ("", "a", "", "bcd", "ef", NULLP)); | |
219 | return 0; | |
220 | } | |
221 | ||
222 | #endif |