annotate lib/amemxfrm.c @ 17334:bb52d9cece01

unsetenv etc.: port to Solaris 11 + GNU Emacs * lib/canonicalize-lgpl.c, lib/getaddrinfo.c, lib/getdelim.c: * lib/glob.c, lib/random_r.c, lib/setenv.c, lib/tsearch.c: * lib/unsetenv.c (_GL_ARG_NONNULL): Define before including <config.h>. GNU Emacs's <config.h> includes <stdlib.h> (which is not a great idea but is too painful to fix right now), and without this gnulib change <stdlib.h> was defining _GL_ARG_NONNULL incorrectly when compiling unsetenv.c on Solaris 11. Fix the problem for unsetenv.c, and fix other similar occurrences.
author Paul Eggert <eggert@cs.ucla.edu>
date Mon, 11 Feb 2013 14:58:56 -0800
parents e542fd46ad6f
children 344018b6e5d7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
13557
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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1 /* Locale dependent memory area transformation for comparison.
17249
e542fd46ad6f maint: update all copyright year number ranges
Eric Blake <eblake@redhat.com>
parents: 16201
diff changeset
2 Copyright (C) 2009-2013 Free Software Foundation, Inc.
13557
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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3 Written by Bruno Haible <bruno@clisp.org>, 2009.
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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4
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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5 This program is free software: you can redistribute it and/or modify it
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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6 under the terms of the GNU Lesser General Public License as published
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
7 by the Free Software Foundation; either version 3 of the License, or
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
8 (at your option) any later version.
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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9
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
10 This program is distributed in the hope that it will be useful,
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
13 Lesser General Public License for more details.
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
14
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
15 You should have received a copy of the GNU Lesser General Public License
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
17
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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18 #include <config.h>
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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19
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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20 /* Specification. */
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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21 #include "amemxfrm.h"
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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22
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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23 #include <errno.h>
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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24 #include <stdlib.h>
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
25 #include <string.h>
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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26
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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27 char *
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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28 amemxfrm (char *s, size_t n, char *resultbuf, size_t *lengthp)
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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29 {
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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30 /* Result accumulator. */
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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31 char *result;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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32 size_t length;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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33 size_t allocated;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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34
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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35 char orig_sentinel;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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36
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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37 /* Initial memory allocation. */
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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38 if (resultbuf != NULL && *lengthp > 0)
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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39 {
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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40 result = resultbuf;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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41 allocated = *lengthp;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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42 }
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
43 else
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
44 {
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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45 allocated = (n > 0 ? n : 1);
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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46 result = (char *) malloc (allocated);
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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47 if (result == NULL)
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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48 goto out_of_memory_2;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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49 }
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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50 length = 0;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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51
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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52 /* Add sentinel.byte. */
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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53 orig_sentinel = s[n];
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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54 s[n] = '\0';
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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55
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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56 /* Iterate through S, transforming each NUL terminated segment.
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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57 Accumulate the resulting transformed segments in result, separated by
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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58 NULs. */
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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59 {
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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60 const char *p_end = s + n + 1;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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61 const char *p;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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62
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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63 p = s;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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64 for (;;)
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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65 {
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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66 /* Search next NUL byte. */
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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67 size_t l = strlen (p);
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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68
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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69 for (;;)
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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70 {
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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71 size_t k;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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72
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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73 /* A call to strxfrm costs about 20 times more than a call to
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
74 strdup of the result. Therefore it is worth to try to avoid
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
75 calling strxfrm more than once on a given string, by making
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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76 enough room before calling strxfrm.
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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77 The size of the strxfrm result, k, is likely to be between
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
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78 l and 3 * l. */
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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79 if (3 * l >= allocated - length)
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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80 {
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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81 /* Grow the result buffer. */
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
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82 size_t new_allocated;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
83 char *new_result;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
84
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
85 new_allocated = length + 3 * l + 1;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
86 if (new_allocated < 2 * allocated)
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
87 new_allocated = 2 * allocated;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
88 if (new_allocated < 64)
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
89 new_allocated = 64;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
90 if (result == resultbuf)
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
91 new_result = (char *) malloc (new_allocated);
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
92 else
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
93 new_result = (char *) realloc (result, new_allocated);
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
94 if (new_result != NULL)
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
95 {
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
96 allocated = new_allocated;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
97 result = new_result;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
98 }
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
99 }
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
100
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
101 errno = 0;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
102 k = strxfrm (result + length, p, allocated - length);
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
103 if (errno != 0)
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
104 goto fail;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
105 if (k >= allocated - length)
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
106 {
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
107 /* Grow the result buffer. */
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
108 size_t new_allocated;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
109 char *new_result;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
110
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
111 new_allocated = length + k + 1;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
112 if (new_allocated < 2 * allocated)
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
113 new_allocated = 2 * allocated;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
114 if (new_allocated < 64)
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
115 new_allocated = 64;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
116 if (result == resultbuf)
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
117 new_result = (char *) malloc (new_allocated);
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
118 else
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
119 new_result = (char *) realloc (result, new_allocated);
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
120 if (new_result == NULL)
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
121 goto out_of_memory_1;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
122 allocated = new_allocated;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
123 result = new_result;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
124 }
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
125 else
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
Bruno Haible <bruno@clisp.org>
parents:
diff changeset
126 {
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127 length += k;
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128 break;
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129 }
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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130 }
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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131
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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132 p = p + l + 1;
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133 if (p == p_end)
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134 break;
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135 result[length] = '\0';
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136 length++;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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137 }
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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138 }
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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139
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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140 /* Shrink the allocated memory if possible.
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141 It is not worth calling realloc when length + 1 == allocated; it would
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142 save just one byte. */
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143 if (result != resultbuf && length + 1 < allocated)
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144 {
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145 if ((length > 0 ? length : 1) <= *lengthp)
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146 {
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147 memcpy (resultbuf, result, length);
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148 free (result);
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149 result = resultbuf;
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150 }
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151 else
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152 {
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153 char *memory = (char *) realloc (result, length > 0 ? length : 1);
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154 if (memory != NULL)
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155 result = memory;
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156 }
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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157 }
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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158
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159 s[n] = orig_sentinel;
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160 *lengthp = length;
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161 return result;
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162
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163 fail:
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164 {
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165 int saved_errno = errno;
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166 if (result != resultbuf)
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167 free (result);
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168 s[n] = orig_sentinel;
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169 errno = saved_errno;
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170 return NULL;
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171 }
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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parents:
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172
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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173 out_of_memory_1:
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174 if (result != resultbuf)
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diff changeset
175 free (result);
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diff changeset
176 s[n] = orig_sentinel;
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diff changeset
177 out_of_memory_2:
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178 errno = ENOMEM;
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179 return NULL;
8db1bc2a38a3 Rename module 'memxfrm' to 'amemxfrm'.
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180 }