Mercurial > hg > CbC > CbC_gcc
annotate libiberty/concat.c @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | f6334be47118 |
| children | 84e7813d76e9 |
| rev | line source |
|---|---|
| 0 | 1 /* Concatenate variable number of strings. |
| 111 | 2 Copyright (C) 1991-2017 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 | |
| 111 | 28 @code{xmalloc}ed memory. The argument list is terminated by the first |
| 29 @code{NULL} pointer encountered. Pointers to empty strings are ignored. | |
| 0 | 30 |
| 31 @end deftypefn | |
| 32 | |
| 33 */ | |
| 34 | |
| 35 | |
| 36 #ifdef HAVE_CONFIG_H | |
| 37 #include "config.h" | |
| 38 #endif | |
| 39 #include "ansidecl.h" | |
| 40 #include "libiberty.h" | |
| 41 #include <sys/types.h> /* size_t */ | |
| 42 | |
| 43 #include <stdarg.h> | |
| 44 | |
| 45 # if HAVE_STRING_H | |
| 46 # include <string.h> | |
| 47 # else | |
| 48 # if HAVE_STRINGS_H | |
| 49 # include <strings.h> | |
| 50 # endif | |
| 51 # endif | |
| 52 | |
| 53 #if HAVE_STDLIB_H | |
| 54 #include <stdlib.h> | |
| 55 #endif | |
| 56 | |
| 57 static inline unsigned long vconcat_length (const char *, va_list); | |
| 58 static inline unsigned long | |
| 59 vconcat_length (const char *first, va_list args) | |
| 60 { | |
| 61 unsigned long length = 0; | |
| 62 const char *arg; | |
| 63 | |
| 64 for (arg = first; arg ; arg = va_arg (args, const char *)) | |
| 65 length += strlen (arg); | |
| 66 | |
| 67 return length; | |
| 68 } | |
| 69 | |
| 70 static inline char * | |
| 71 vconcat_copy (char *dst, const char *first, va_list args) | |
| 72 { | |
| 73 char *end = dst; | |
| 74 const char *arg; | |
| 75 | |
| 76 for (arg = first; arg ; arg = va_arg (args, const char *)) | |
| 77 { | |
| 78 unsigned long length = strlen (arg); | |
| 79 memcpy (end, arg, length); | |
| 80 end += length; | |
| 81 } | |
| 82 *end = '\000'; | |
| 83 | |
| 84 return dst; | |
| 85 } | |
| 86 | |
| 87 /* @undocumented concat_length */ | |
| 88 | |
| 89 unsigned long | |
| 90 concat_length (const char *first, ...) | |
| 91 { | |
| 92 unsigned long length; | |
| 111 | 93 va_list args; |
| 0 | 94 |
| 111 | 95 va_start (args, first); |
| 0 | 96 length = vconcat_length (first, args); |
| 111 | 97 va_end (args); |
| 0 | 98 |
| 99 return length; | |
| 100 } | |
| 101 | |
| 102 /* @undocumented concat_copy */ | |
| 103 | |
| 104 char * | |
| 105 concat_copy (char *dst, const char *first, ...) | |
| 106 { | |
| 107 char *save_dst; | |
| 111 | 108 va_list args; |
| 0 | 109 |
| 111 | 110 va_start (args, first); |
| 0 | 111 vconcat_copy (dst, first, args); |
| 112 save_dst = dst; /* With K&R C, dst goes out of scope here. */ | |
| 111 | 113 va_end (args); |
| 0 | 114 |
| 115 return save_dst; | |
| 116 } | |
| 117 | |
| 118 #ifdef __cplusplus | |
| 119 extern "C" { | |
| 120 #endif /* __cplusplus */ | |
| 121 char *libiberty_concat_ptr; | |
| 122 #ifdef __cplusplus | |
| 123 } | |
| 124 #endif /* __cplusplus */ | |
| 125 | |
| 126 /* @undocumented concat_copy2 */ | |
| 127 | |
| 128 char * | |
| 129 concat_copy2 (const char *first, ...) | |
| 130 { | |
| 111 | 131 va_list args; |
| 132 va_start (args, first); | |
| 0 | 133 vconcat_copy (libiberty_concat_ptr, first, args); |
| 111 | 134 va_end (args); |
| 0 | 135 |
| 136 return libiberty_concat_ptr; | |
| 137 } | |
| 138 | |
| 139 char * | |
| 140 concat (const char *first, ...) | |
| 141 { | |
| 142 char *newstr; | |
| 111 | 143 va_list args; |
| 0 | 144 |
| 145 /* First compute the size of the result and get sufficient memory. */ | |
| 111 | 146 va_start (args, first); |
| 0 | 147 newstr = XNEWVEC (char, vconcat_length (first, args) + 1); |
| 111 | 148 va_end (args); |
| 0 | 149 |
| 150 /* Now copy the individual pieces to the result string. */ | |
| 111 | 151 va_start (args, first); |
| 0 | 152 vconcat_copy (newstr, first, args); |
| 111 | 153 va_end (args); |
| 0 | 154 |
| 155 return newstr; | |
| 156 } | |
| 157 | |
| 158 /* | |
| 159 | |
|
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
|
160 @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
|
161 @dots{}, @code{NULL}) |
| 0 | 162 |
| 163 Same as @code{concat}, except that if @var{optr} is not @code{NULL} it | |
| 164 is freed after the string is created. This is intended to be useful | |
| 165 when you're extending an existing string or building up a string in a | |
| 166 loop: | |
| 167 | |
| 168 @example | |
| 169 str = reconcat (str, "pre-", str, NULL); | |
| 170 @end example | |
| 171 | |
| 172 @end deftypefn | |
| 173 | |
| 174 */ | |
| 175 | |
| 176 char * | |
| 177 reconcat (char *optr, const char *first, ...) | |
| 178 { | |
| 179 char *newstr; | |
| 111 | 180 va_list args; |
| 0 | 181 |
| 182 /* First compute the size of the result and get sufficient memory. */ | |
| 111 | 183 va_start (args, first); |
| 0 | 184 newstr = XNEWVEC (char, vconcat_length (first, args) + 1); |
| 111 | 185 va_end (args); |
| 0 | 186 |
| 187 /* Now copy the individual pieces to the result string. */ | |
| 111 | 188 va_start (args, first); |
| 0 | 189 vconcat_copy (newstr, first, args); |
| 190 if (optr) /* Done before VA_CLOSE so optr stays in scope for K&R C. */ | |
| 191 free (optr); | |
| 111 | 192 va_end (args); |
| 0 | 193 |
| 194 return newstr; | |
| 195 } | |
| 196 | |
| 197 #ifdef MAIN | |
| 198 #define NULLP (char *)0 | |
| 199 | |
| 200 /* Simple little test driver. */ | |
| 201 | |
| 202 #include <stdio.h> | |
| 203 | |
| 204 int | |
| 205 main (void) | |
| 206 { | |
| 207 printf ("\"\" = \"%s\"\n", concat (NULLP)); | |
| 208 printf ("\"a\" = \"%s\"\n", concat ("a", NULLP)); | |
| 209 printf ("\"ab\" = \"%s\"\n", concat ("a", "b", NULLP)); | |
| 210 printf ("\"abc\" = \"%s\"\n", concat ("a", "b", "c", NULLP)); | |
| 211 printf ("\"abcd\" = \"%s\"\n", concat ("ab", "cd", NULLP)); | |
| 212 printf ("\"abcde\" = \"%s\"\n", concat ("ab", "c", "de", NULLP)); | |
| 213 printf ("\"abcdef\" = \"%s\"\n", concat ("", "a", "", "bcd", "ef", NULLP)); | |
| 214 return 0; | |
| 215 } | |
| 216 | |
| 217 #endif |