[4958] | 1 | //memmgr.c: |
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| 2 | |
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| 3 | /* |
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| 4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2011 |
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| 5 | * |
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| 6 | * This file is part of libroar a part of RoarAudio, |
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| 7 | * a cross-platform sound system for both, home and professional use. |
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| 8 | * See README for details. |
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| 9 | * |
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| 10 | * This file is free software; you can redistribute it and/or modify |
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| 11 | * it under the terms of the GNU General Public License version 3 |
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| 12 | * as published by the Free Software Foundation. |
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| 13 | * |
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| 14 | * libroar is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * You should have received a copy of the GNU General Public License |
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| 20 | * along with this software; see the file COPYING. If not, write to |
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| 21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
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| 22 | * Boston, MA 02110-1301, USA. |
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| 23 | * |
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| 24 | * NOTE for everyone want's to change something and send patches: |
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| 25 | * read README and HACKING! There a addition information on |
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| 26 | * the license of this document you need to read before you send |
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| 27 | * any patches. |
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| 28 | * |
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| 29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
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| 30 | * or libpulse*: |
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| 31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
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| 32 | * and are therefore GPL. Because of this it may be illigal to use |
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| 33 | * them with any software that uses libesd, libartsc or libpulse*. |
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| 34 | */ |
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| 35 | |
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| 36 | #include "libroar.h" |
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| 37 | |
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[4971] | 38 | #define NULL_BUFFER_CONST "RoarAudio" |
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| 39 | static char _libroar_null_buffer[] = NULL_BUFFER_CONST; // A byte sequense >= 8 byte. |
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[4972] | 40 | |
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| 41 | static inline void _libroar_null_buffer_check(void) { |
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| 42 | if ( memcmp(_libroar_null_buffer, NULL_BUFFER_CONST, sizeof(_libroar_null_buffer)) != 0 ) |
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| 43 | roar_panic(ROAR_FATAL_ERROR_MEMORY_CORRUPTION_GUARD, NULL); |
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| 44 | memcpy(_libroar_null_buffer, NULL_BUFFER_CONST, sizeof(_libroar_null_buffer)); |
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| 45 | } |
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[4958] | 46 | |
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| 47 | #define _err(x) do { roar_err_set((x)); return NULL; } while (0) |
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| 48 | |
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| 49 | #ifdef ROAR_USE_MEMMGR |
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| 50 | void * roar_mm_calloc(size_t nmemb, size_t size) { |
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| 51 | void * ret; |
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| 52 | |
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[4972] | 53 | if ( nmemb == 0 || size == 0 ) { |
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| 54 | _libroar_null_buffer_check(); |
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[4958] | 55 | return _libroar_null_buffer; |
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[4972] | 56 | } |
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[4958] | 57 | |
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| 58 | #ifdef ROAR_HAVE_CALLOC |
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| 59 | roar_err_clear_all(); |
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| 60 | ret = calloc(nmemb, size); |
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| 61 | |
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| 62 | if ( ret == NULL ) |
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| 63 | roar_err_update(); |
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| 64 | |
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| 65 | return ret; |
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| 66 | #else |
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| 67 | ret = roar_mm_malloc(nmemb*size); |
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| 68 | if ( ret == NULL ) |
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| 69 | return NULL; |
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| 70 | |
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| 71 | memset(ret, 0, nmemb*size); |
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| 72 | |
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| 73 | return ret; |
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| 74 | #endif |
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| 75 | } |
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| 76 | |
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| 77 | void * roar_mm_malloc(size_t size) { |
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| 78 | void * ret; |
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| 79 | |
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[4972] | 80 | if ( size == 0 ) { |
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| 81 | _libroar_null_buffer_check(); |
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[4958] | 82 | return _libroar_null_buffer; |
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[4972] | 83 | } |
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[4958] | 84 | |
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| 85 | #ifdef ROAR_HAVE_MALLOC |
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| 86 | roar_err_clear_all(); |
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| 87 | ret = malloc(size); |
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| 88 | |
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| 89 | if ( ret == NULL ) |
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| 90 | roar_err_update(); |
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| 91 | |
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| 92 | return ret; |
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| 93 | #elif defined(ROAR_HAVE_CALLOC) |
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| 94 | return roar_mm_calloc(1, size); |
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| 95 | #elif defined(ROAR_HAVE_REALLOC) |
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| 96 | return roar_mm_realloc(NULL, size); |
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| 97 | #else |
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| 98 | _err(ROAR_ERROR_NOSYS); |
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| 99 | #endif |
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| 100 | } |
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| 101 | |
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| 102 | int roar_mm_free(void *ptr) { |
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[4972] | 103 | |
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| 104 | if ( ptr == _libroar_null_buffer ) { |
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| 105 | _libroar_null_buffer_check(); |
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[4958] | 106 | return 0; |
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[4972] | 107 | } |
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[4958] | 108 | |
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| 109 | #ifdef ROAR_HAVE_FREE |
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| 110 | free(ptr); |
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| 111 | return 0; |
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| 112 | #elif defined(ROAR_HAVE_REALLOC) |
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| 113 | if ( roar_mm_realloc(ptr, 0) != _libroar_null_buffer ) |
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| 114 | return -1; |
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| 115 | return 0; |
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| 116 | #else |
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| 117 | roar_err_set(ROAR_ERROR_NOSYS); |
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| 118 | return -1; |
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| 119 | #endif |
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| 120 | } |
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| 121 | |
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| 122 | void * roar_mm_realloc(void *ptr, size_t size) { |
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| 123 | #ifdef ROAR_HAVE_REALLOC |
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| 124 | void * ret; |
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| 125 | #endif |
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| 126 | |
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| 127 | if ( ptr == NULL ) |
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| 128 | return roar_mm_malloc(size); |
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| 129 | |
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| 130 | if ( size == 0 ) { |
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| 131 | roar_mm_free(ptr); |
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[4972] | 132 | _libroar_null_buffer_check(); |
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[4958] | 133 | return _libroar_null_buffer; |
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| 134 | } |
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| 135 | |
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| 136 | #ifdef ROAR_HAVE_REALLOC |
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| 137 | roar_err_clear_all(); |
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| 138 | ret = realloc(ptr, size); |
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| 139 | |
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| 140 | if ( ret == NULL ) |
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| 141 | roar_err_update(); |
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| 142 | |
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| 143 | return ret; |
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| 144 | #else |
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| 145 | _err(ROAR_ERROR_NOTSUP); |
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| 146 | #endif |
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| 147 | } |
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| 148 | #endif |
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| 149 | |
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| 150 | void * roar_mm_memdup(const void * s, size_t len) { |
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| 151 | void * ret; |
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| 152 | |
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| 153 | if ( s == NULL ) |
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| 154 | _err(ROAR_ERROR_FAULT); |
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| 155 | |
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[4972] | 156 | if ( len == 0 ) { |
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| 157 | _libroar_null_buffer_check(); |
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| 158 | return _libroar_null_buffer; |
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| 159 | } |
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| 160 | |
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[4958] | 161 | ret = roar_mm_malloc(len); |
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| 162 | |
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| 163 | if ( ret == NULL ) |
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| 164 | return NULL; |
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| 165 | |
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| 166 | memcpy(ret, s, len); |
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| 167 | |
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| 168 | return ret; |
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| 169 | } |
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| 170 | |
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| 171 | #if defined(ROAR_USE_MEMMGR) || !defined(ROAR_HAVE_STRDUP) |
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| 172 | char * roar_mm_strdup(const char *s) { |
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| 173 | void * ret; |
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| 174 | #ifndef ROAR_HAVE_STRDUP |
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| 175 | ssize_t len; |
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| 176 | #endif |
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| 177 | |
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| 178 | if ( s == NULL ) |
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| 179 | _err(ROAR_ERROR_FAULT); |
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| 180 | |
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| 181 | #ifdef ROAR_HAVE_STRDUP |
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| 182 | roar_err_clear_all(); |
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| 183 | ret = strdup(s); |
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| 184 | |
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| 185 | if ( ret == NULL ) |
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| 186 | roar_err_update(); |
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| 187 | #else |
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| 188 | len = roar_mm_strlen(s); |
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| 189 | if ( len == -1 ) |
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| 190 | return NULL; |
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| 191 | |
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| 192 | ret = roar_mm_memdup(s, len+1); |
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| 193 | #endif |
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| 194 | |
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| 195 | return ret; |
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| 196 | } |
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| 197 | #endif |
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| 198 | |
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| 199 | #if defined(ROAR_USE_MEMMGR) || !defined(ROAR_HAVE_STRNDUP) |
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| 200 | char *roar_mm_strndup(const char *s, size_t n) { |
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| 201 | void * ret; |
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| 202 | #ifndef ROAR_HAVE_STRDUP |
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| 203 | ssize_t len; |
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| 204 | #endif |
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| 205 | |
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| 206 | if ( s == NULL ) |
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| 207 | _err(ROAR_ERROR_FAULT); |
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| 208 | |
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[4972] | 209 | if ( n == 0 ) { |
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| 210 | _libroar_null_buffer_check(); |
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| 211 | return _libroar_null_buffer; |
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| 212 | } |
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| 213 | |
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[4958] | 214 | #ifdef ROAR_HAVE_STRDUP |
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| 215 | roar_err_clear_all(); |
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| 216 | ret = strndup(s, n); |
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| 217 | |
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| 218 | if ( ret == NULL ) |
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| 219 | roar_err_update(); |
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| 220 | #else |
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| 221 | len = roar_mm_strnlen(s, n); |
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| 222 | if ( len == -1 ) |
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| 223 | return NULL; |
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| 224 | |
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| 225 | ret = roar_mm_memdup(s, len+1); |
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| 226 | #endif |
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| 227 | |
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| 228 | return ret; |
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| 229 | } |
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| 230 | #endif |
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| 231 | |
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| 232 | #ifndef ROAR_HAVE_STRLEN |
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| 233 | ssize_t roar_mm_strlen(const char *s) { |
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| 234 | size_t ret = 0; |
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| 235 | |
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| 236 | if ( s == NULL ) { |
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| 237 | roar_err_set(ROAR_ERROR_FAULT); |
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| 238 | return -1; |
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| 239 | } |
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| 240 | |
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| 241 | for (; *s != 0; s++, ret++); |
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| 242 | |
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| 243 | return ret; |
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| 244 | } |
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| 245 | #endif |
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| 246 | |
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| 247 | ssize_t roar_mm_strnlen(const char *s, size_t maxlen) { |
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| 248 | size_t ret = 0; |
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| 249 | |
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| 250 | if ( s == NULL ) { |
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| 251 | roar_err_set(ROAR_ERROR_FAULT); |
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| 252 | return -1; |
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| 253 | } |
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| 254 | |
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| 255 | #ifdef ROAR_HAVE_STRNLEN |
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| 256 | ret = strnlen(s, maxlen); |
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| 257 | #else |
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| 258 | for (; ret < maxlen && *s != 0; s++, ret++); |
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| 259 | #endif |
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| 260 | |
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| 261 | if ( ret == maxlen ) { |
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[4966] | 262 | roar_err_set(ROAR_ERROR_MSGSIZE); |
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[4958] | 263 | return -1; |
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| 264 | } |
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| 265 | |
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| 266 | return ret; |
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| 267 | } |
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| 268 | |
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| 269 | //ll |
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