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annotate libs/assimp/StringComparison.h @ 0:b2f14e535253

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author John Tsiombikas <nuclear@member.fsf.org>
date Sat, 01 Feb 2014 19:58:19 +0200
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nuclear@0 1 /*
nuclear@0 2 Open Asset Import Library (assimp)
nuclear@0 3 ----------------------------------------------------------------------
nuclear@0 4
nuclear@0 5 Copyright (c) 2006-2012, assimp team
nuclear@0 6 All rights reserved.
nuclear@0 7
nuclear@0 8 Redistribution and use of this software in source and binary forms,
nuclear@0 9 with or without modification, are permitted provided that the
nuclear@0 10 following conditions are met:
nuclear@0 11
nuclear@0 12 * Redistributions of source code must retain the above
nuclear@0 13 copyright notice, this list of conditions and the
nuclear@0 14 following disclaimer.
nuclear@0 15
nuclear@0 16 * Redistributions in binary form must reproduce the above
nuclear@0 17 copyright notice, this list of conditions and the
nuclear@0 18 following disclaimer in the documentation and/or other
nuclear@0 19 materials provided with the distribution.
nuclear@0 20
nuclear@0 21 * Neither the name of the assimp team, nor the names of its
nuclear@0 22 contributors may be used to endorse or promote products
nuclear@0 23 derived from this software without specific prior
nuclear@0 24 written permission of the assimp team.
nuclear@0 25
nuclear@0 26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
nuclear@0 27 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
nuclear@0 28 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
nuclear@0 29 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
nuclear@0 30 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
nuclear@0 31 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
nuclear@0 32 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
nuclear@0 33 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
nuclear@0 34 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
nuclear@0 35 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
nuclear@0 36 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
nuclear@0 37
nuclear@0 38 ----------------------------------------------------------------------
nuclear@0 39 */
nuclear@0 40
nuclear@0 41 /** @file Definition of platform independent string workers:
nuclear@0 42
nuclear@0 43 ASSIMP_itoa10
nuclear@0 44 ASSIMP_stricmp
nuclear@0 45 ASSIMP_strincmp
nuclear@0 46
nuclear@0 47 These functions are not consistently available on all platforms,
nuclear@0 48 or the provided implementations behave too differently.
nuclear@0 49 */
nuclear@0 50 #ifndef INCLUDED_AI_STRING_WORKERS_H
nuclear@0 51 #define INCLUDED_AI_STRING_WORKERS_H
nuclear@0 52
nuclear@0 53 #include "assimp/ai_assert.h"
nuclear@0 54
nuclear@0 55 namespace Assimp {
nuclear@0 56
nuclear@0 57 // -------------------------------------------------------------------------------
nuclear@0 58 /** @brief itoa with a fixed base 10
nuclear@0 59 * 'itoa' is not consistently available on all platforms so it is quite useful
nuclear@0 60 * to have a small replacement function here. No need to use a full sprintf()
nuclear@0 61 * if we just want to print a number ...
nuclear@0 62 * @param out Output buffer
nuclear@0 63 * @param max Maximum number of characters to be written, including '\0'.
nuclear@0 64 * This parameter may not be 0.
nuclear@0 65 * @param number Number to be written
nuclear@0 66 * @return Length of the output string, excluding the '\0'
nuclear@0 67 */
nuclear@0 68 inline unsigned int ASSIMP_itoa10( char* out, unsigned int max, int32_t number)
nuclear@0 69 {
nuclear@0 70 ai_assert(NULL != out);
nuclear@0 71
nuclear@0 72 // write the unary minus to indicate we have a negative number
nuclear@0 73 unsigned int written = 1u;
nuclear@0 74 if (number < 0 && written < max) {
nuclear@0 75 *out++ = '-';
nuclear@0 76 ++written;
nuclear@0 77 number = -number;
nuclear@0 78 }
nuclear@0 79
nuclear@0 80 // We begin with the largest number that is not zero.
nuclear@0 81 int32_t cur = 1000000000; // 2147483648
nuclear@0 82 bool mustPrint = false;
nuclear@0 83 while (written < max) {
nuclear@0 84
nuclear@0 85 const unsigned int digit = number / cur;
nuclear@0 86 if (mustPrint || digit > 0 || 1 == cur) {
nuclear@0 87 // print all future zeroes from now
nuclear@0 88 mustPrint = true;
nuclear@0 89
nuclear@0 90 *out++ = '0'+static_cast<char>(digit);
nuclear@0 91
nuclear@0 92 ++written;
nuclear@0 93 number -= digit*cur;
nuclear@0 94 if (1 == cur) {
nuclear@0 95 break;
nuclear@0 96 }
nuclear@0 97 }
nuclear@0 98 cur /= 10;
nuclear@0 99 }
nuclear@0 100
nuclear@0 101 // append a terminal zero
nuclear@0 102 *out++ = '\0';
nuclear@0 103 return written-1;
nuclear@0 104 }
nuclear@0 105
nuclear@0 106 // -------------------------------------------------------------------------------
nuclear@0 107 /** @brief itoa with a fixed base 10 (Secure template overload)
nuclear@0 108 * The compiler should choose this function if he or she is able to determine the
nuclear@0 109 * size of the array automatically.
nuclear@0 110 */
nuclear@0 111 template <size_t length>
nuclear@0 112 inline unsigned int ASSIMP_itoa10( char(& out)[length], int32_t number)
nuclear@0 113 {
nuclear@0 114 return ASSIMP_itoa10(out,length,number);
nuclear@0 115 }
nuclear@0 116
nuclear@0 117 // -------------------------------------------------------------------------------
nuclear@0 118 /** @brief Helper function to do platform independent string comparison.
nuclear@0 119 *
nuclear@0 120 * This is required since stricmp() is not consistently available on
nuclear@0 121 * all platforms. Some platforms use the '_' prefix, others don't even
nuclear@0 122 * have such a function.
nuclear@0 123 *
nuclear@0 124 * @param s1 First input string
nuclear@0 125 * @param s2 Second input string
nuclear@0 126 * @return 0 if the given strings are identical
nuclear@0 127 */
nuclear@0 128 inline int ASSIMP_stricmp(const char *s1, const char *s2)
nuclear@0 129 {
nuclear@0 130 ai_assert(NULL != s1 && NULL != s2);
nuclear@0 131
nuclear@0 132 #if (defined _MSC_VER)
nuclear@0 133
nuclear@0 134 return ::_stricmp(s1,s2);
nuclear@0 135 #elif defined( __GNUC__ )
nuclear@0 136
nuclear@0 137 return ::strcasecmp(s1,s2);
nuclear@0 138 #else
nuclear@0 139
nuclear@0 140 register char c1, c2;
nuclear@0 141 do {
nuclear@0 142 c1 = tolower(*s1++);
nuclear@0 143 c2 = tolower(*s2++);
nuclear@0 144 }
nuclear@0 145 while ( c1 && (c1 == c2) );
nuclear@0 146 return c1 - c2;
nuclear@0 147 #endif
nuclear@0 148 }
nuclear@0 149
nuclear@0 150 // -------------------------------------------------------------------------------
nuclear@0 151 /** @brief Case independent comparison of two std::strings
nuclear@0 152 *
nuclear@0 153 * @param a First string
nuclear@0 154 * @param b Second string
nuclear@0 155 * @return 0 if a == b
nuclear@0 156 */
nuclear@0 157 inline int ASSIMP_stricmp(const std::string& a, const std::string& b)
nuclear@0 158 {
nuclear@0 159 register int i = (int)b.length()-(int)a.length();
nuclear@0 160 return (i ? i : ASSIMP_stricmp(a.c_str(),b.c_str()));
nuclear@0 161 }
nuclear@0 162
nuclear@0 163 // -------------------------------------------------------------------------------
nuclear@0 164 /** @brief Helper function to do platform independent string comparison.
nuclear@0 165 *
nuclear@0 166 * This is required since strincmp() is not consistently available on
nuclear@0 167 * all platforms. Some platforms use the '_' prefix, others don't even
nuclear@0 168 * have such a function.
nuclear@0 169 *
nuclear@0 170 * @param s1 First input string
nuclear@0 171 * @param s2 Second input string
nuclear@0 172 * @param n Macimum number of characters to compare
nuclear@0 173 * @return 0 if the given strings are identical
nuclear@0 174 */
nuclear@0 175 inline int ASSIMP_strincmp(const char *s1, const char *s2, unsigned int n)
nuclear@0 176 {
nuclear@0 177 ai_assert(NULL != s1 && NULL != s2);
nuclear@0 178 if (!n)return 0;
nuclear@0 179
nuclear@0 180 #if (defined _MSC_VER)
nuclear@0 181
nuclear@0 182 return ::_strnicmp(s1,s2,n);
nuclear@0 183
nuclear@0 184 #elif defined( __GNUC__ )
nuclear@0 185
nuclear@0 186 return ::strncasecmp(s1,s2, n);
nuclear@0 187
nuclear@0 188 #else
nuclear@0 189 register char c1, c2;
nuclear@0 190 unsigned int p = 0;
nuclear@0 191 do
nuclear@0 192 {
nuclear@0 193 if (p++ >= n)return 0;
nuclear@0 194 c1 = tolower(*s1++);
nuclear@0 195 c2 = tolower(*s2++);
nuclear@0 196 }
nuclear@0 197 while ( c1 && (c1 == c2) );
nuclear@0 198
nuclear@0 199 return c1 - c2;
nuclear@0 200 #endif
nuclear@0 201 }
nuclear@0 202
nuclear@0 203
nuclear@0 204 // -------------------------------------------------------------------------------
nuclear@0 205 /** @brief Evaluates an integer power
nuclear@0 206 *
nuclear@0 207 * todo: move somewhere where it fits better in than here
nuclear@0 208 */
nuclear@0 209 inline unsigned int integer_pow (unsigned int base, unsigned int power)
nuclear@0 210 {
nuclear@0 211 unsigned int res = 1;
nuclear@0 212 for (unsigned int i = 0; i < power;++i)
nuclear@0 213 res *= base;
nuclear@0 214
nuclear@0 215 return res;
nuclear@0 216 }
nuclear@0 217 } // end of namespace
nuclear@0 218
nuclear@0 219 #endif // ! AI_STRINGCOMPARISON_H_INC