Mercurial > hg > CbC > CbC_gcc
annotate libiberty/concat.c @ 67:f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
| author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Tue, 22 Mar 2011 17:18:12 +0900 |
| parents | a06113de4d67 |
| children | 04ced10e8804 |
| rev | line source |
|---|---|
| 0 | 1 /* Concatenate variable number of strings. |
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2 Copyright (C) 1991, 1994, 2001, 2011 Free Software Foundation, Inc. |
| 0 | 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 | |
| 18 not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, | |
| 19 Boston, MA 02110-1301, USA. */ | |
| 20 | |
| 21 | |
| 22 /* | |
| 23 | |
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
24 @deftypefn Extension char* concat (const char *@var{s1}, const char *@var{s2}, @ |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
25 @dots{}, @code{NULL}) |
| 0 | 26 |
| 27 Concatenate zero or more of strings and return the result in freshly | |
| 28 @code{xmalloc}ed memory. Returns @code{NULL} if insufficient memory is | |
| 29 available. The argument list is terminated by the first @code{NULL} | |
| 30 pointer encountered. Pointers to empty strings are ignored. | |
| 31 | |
| 32 @end deftypefn | |
| 33 | |
| 34 NOTES | |
| 35 | |
| 36 This function uses xmalloc() which is expected to be a front end | |
| 37 function to malloc() that deals with low memory situations. In | |
| 38 typical use, if malloc() returns NULL then xmalloc() diverts to an | |
| 39 error handler routine which never returns, and thus xmalloc will | |
| 40 never return a NULL pointer. If the client application wishes to | |
| 41 deal with low memory situations itself, it should supply an xmalloc | |
| 42 that just directly invokes malloc and blindly returns whatever | |
| 43 malloc returns. | |
| 44 | |
| 45 */ | |
| 46 | |
| 47 | |
| 48 #ifdef HAVE_CONFIG_H | |
| 49 #include "config.h" | |
| 50 #endif | |
| 51 #include "ansidecl.h" | |
| 52 #include "libiberty.h" | |
| 53 #include <sys/types.h> /* size_t */ | |
| 54 | |
| 55 #include <stdarg.h> | |
| 56 | |
| 57 # if HAVE_STRING_H | |
| 58 # include <string.h> | |
| 59 # else | |
| 60 # if HAVE_STRINGS_H | |
| 61 # include <strings.h> | |
| 62 # endif | |
| 63 # endif | |
| 64 | |
| 65 #if HAVE_STDLIB_H | |
| 66 #include <stdlib.h> | |
| 67 #endif | |
| 68 | |
| 69 static inline unsigned long vconcat_length (const char *, va_list); | |
| 70 static inline unsigned long | |
| 71 vconcat_length (const char *first, va_list args) | |
| 72 { | |
| 73 unsigned long length = 0; | |
| 74 const char *arg; | |
| 75 | |
| 76 for (arg = first; arg ; arg = va_arg (args, const char *)) | |
| 77 length += strlen (arg); | |
| 78 | |
| 79 return length; | |
| 80 } | |
| 81 | |
| 82 static inline char * | |
| 83 vconcat_copy (char *dst, const char *first, va_list args) | |
| 84 { | |
| 85 char *end = dst; | |
| 86 const char *arg; | |
| 87 | |
| 88 for (arg = first; arg ; arg = va_arg (args, const char *)) | |
| 89 { | |
| 90 unsigned long length = strlen (arg); | |
| 91 memcpy (end, arg, length); | |
| 92 end += length; | |
| 93 } | |
| 94 *end = '\000'; | |
| 95 | |
| 96 return dst; | |
| 97 } | |
| 98 | |
| 99 /* @undocumented concat_length */ | |
| 100 | |
| 101 unsigned long | |
| 102 concat_length (const char *first, ...) | |
| 103 { | |
| 104 unsigned long length; | |
| 105 | |
| 106 VA_OPEN (args, first); | |
| 107 VA_FIXEDARG (args, const char *, first); | |
| 108 length = vconcat_length (first, args); | |
| 109 VA_CLOSE (args); | |
| 110 | |
| 111 return length; | |
| 112 } | |
| 113 | |
| 114 /* @undocumented concat_copy */ | |
| 115 | |
| 116 char * | |
| 117 concat_copy (char *dst, const char *first, ...) | |
| 118 { | |
| 119 char *save_dst; | |
| 120 | |
| 121 VA_OPEN (args, first); | |
| 122 VA_FIXEDARG (args, char *, dst); | |
| 123 VA_FIXEDARG (args, const char *, first); | |
| 124 vconcat_copy (dst, first, args); | |
| 125 save_dst = dst; /* With K&R C, dst goes out of scope here. */ | |
| 126 VA_CLOSE (args); | |
| 127 | |
| 128 return save_dst; | |
| 129 } | |
| 130 | |
| 131 #ifdef __cplusplus | |
| 132 extern "C" { | |
| 133 #endif /* __cplusplus */ | |
| 134 char *libiberty_concat_ptr; | |
| 135 #ifdef __cplusplus | |
| 136 } | |
| 137 #endif /* __cplusplus */ | |
| 138 | |
| 139 /* @undocumented concat_copy2 */ | |
| 140 | |
| 141 char * | |
| 142 concat_copy2 (const char *first, ...) | |
| 143 { | |
| 144 VA_OPEN (args, first); | |
| 145 VA_FIXEDARG (args, const char *, first); | |
| 146 vconcat_copy (libiberty_concat_ptr, first, args); | |
| 147 VA_CLOSE (args); | |
| 148 | |
| 149 return libiberty_concat_ptr; | |
| 150 } | |
| 151 | |
| 152 char * | |
| 153 concat (const char *first, ...) | |
| 154 { | |
| 155 char *newstr; | |
| 156 | |
| 157 /* First compute the size of the result and get sufficient memory. */ | |
| 158 VA_OPEN (args, first); | |
| 159 VA_FIXEDARG (args, const char *, first); | |
| 160 newstr = XNEWVEC (char, vconcat_length (first, args) + 1); | |
| 161 VA_CLOSE (args); | |
| 162 | |
| 163 /* Now copy the individual pieces to the result string. */ | |
| 164 VA_OPEN (args, first); | |
| 165 VA_FIXEDARG (args, const char *, first); | |
| 166 vconcat_copy (newstr, first, args); | |
| 167 VA_CLOSE (args); | |
| 168 | |
| 169 return newstr; | |
| 170 } | |
| 171 | |
| 172 /* | |
| 173 | |
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
174 @deftypefn Extension char* reconcat (char *@var{optr}, const char *@var{s1}, @ |
|
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
175 @dots{}, @code{NULL}) |
| 0 | 176 |
| 177 Same as @code{concat}, except that if @var{optr} is not @code{NULL} it | |
| 178 is freed after the string is created. This is intended to be useful | |
| 179 when you're extending an existing string or building up a string in a | |
| 180 loop: | |
| 181 | |
| 182 @example | |
| 183 str = reconcat (str, "pre-", str, NULL); | |
| 184 @end example | |
| 185 | |
| 186 @end deftypefn | |
| 187 | |
| 188 */ | |
| 189 | |
| 190 char * | |
| 191 reconcat (char *optr, const char *first, ...) | |
| 192 { | |
| 193 char *newstr; | |
| 194 | |
| 195 /* First compute the size of the result and get sufficient memory. */ | |
| 196 VA_OPEN (args, first); | |
| 197 VA_FIXEDARG (args, char *, optr); | |
| 198 VA_FIXEDARG (args, const char *, first); | |
| 199 newstr = XNEWVEC (char, vconcat_length (first, args) + 1); | |
| 200 VA_CLOSE (args); | |
| 201 | |
| 202 /* Now copy the individual pieces to the result string. */ | |
| 203 VA_OPEN (args, first); | |
| 204 VA_FIXEDARG (args, char *, optr); | |
| 205 VA_FIXEDARG (args, const char *, first); | |
| 206 vconcat_copy (newstr, first, args); | |
| 207 if (optr) /* Done before VA_CLOSE so optr stays in scope for K&R C. */ | |
| 208 free (optr); | |
| 209 VA_CLOSE (args); | |
| 210 | |
| 211 return newstr; | |
| 212 } | |
| 213 | |
| 214 #ifdef MAIN | |
| 215 #define NULLP (char *)0 | |
| 216 | |
| 217 /* Simple little test driver. */ | |
| 218 | |
| 219 #include <stdio.h> | |
| 220 | |
| 221 int | |
| 222 main (void) | |
| 223 { | |
| 224 printf ("\"\" = \"%s\"\n", concat (NULLP)); | |
| 225 printf ("\"a\" = \"%s\"\n", concat ("a", NULLP)); | |
| 226 printf ("\"ab\" = \"%s\"\n", concat ("a", "b", NULLP)); | |
| 227 printf ("\"abc\" = \"%s\"\n", concat ("a", "b", "c", NULLP)); | |
| 228 printf ("\"abcd\" = \"%s\"\n", concat ("ab", "cd", NULLP)); | |
| 229 printf ("\"abcde\" = \"%s\"\n", concat ("ab", "c", "de", NULLP)); | |
| 230 printf ("\"abcdef\" = \"%s\"\n", concat ("", "a", "", "bcd", "ef", NULLP)); | |
| 231 return 0; | |
| 232 } | |
| 233 | |
| 234 #endif |