ucx/utils.c

Thu, 03 Jul 2014 15:50:13 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Thu, 03 Jul 2014 15:50:13 +0200
changeset 49
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parent 39
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child 70
88092b88ec00
permissions
-rw-r--r--

dav-sync detects locally removed files

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2013 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include "utils.h"
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30 #include <math.h>
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31 #include <stdio.h>
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32 #include <limits.h>
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33 #include <errno.h>
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34
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35 /* COPY FUCNTIONS */
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36 void* ucx_strcpy(void* s, void* data) {
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37 char *str = (char*) s;
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38 size_t n = 1+strlen(str);
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39 char *cpy = (char*) malloc(n);
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40 memcpy(cpy, str, n);
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41 return cpy;
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42 }
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43
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44 void* ucx_memcpy(void* m, void* n) {
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45 size_t k = *((size_t*)n);
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46 void *cpy = malloc(k);
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47 memcpy(cpy, m, k);
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48 return cpy;
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49 }
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50
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51 size_t ucx_stream_copy(void *src, void *dest, read_func readfnc,
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52 write_func writefnc, char* buf, size_t bufsize, size_t n) {
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53 if(n == 0 || bufsize == 0) {
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54 return 0;
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55 }
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56
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57 size_t ncp = 0;
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58 if (!buf) {
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59 buf = (char*)malloc(bufsize);
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60 if(buf == NULL) {
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61 return 0;
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62 }
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63 }
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64
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65 size_t r;
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66 size_t rn = bufsize > n ? n : bufsize;
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67 while((r = readfnc(buf, 1, rn, src)) != 0) {
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68 r = writefnc(buf, 1, r, dest);
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69 ncp += r;
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70 n -= r;
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71 rn = bufsize > n ? n : bufsize;
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72 if(r == 0 || n == 0) {
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73 break;
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74 }
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75 }
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76
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77 free(buf);
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78 return ncp;
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79 }
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80
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81 /* COMPARE FUNCTIONS */
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82
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83 int ucx_strcmp(void *s1, void *s2, void *data) {
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84 return strcmp((char*)s1, (char*)s2);
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85 }
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86
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87 int ucx_strncmp(void *s1, void *s2, void *n) {
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88 return strncmp((char*)s1, (char*)s2, *((size_t*) n));
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89 }
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90
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91 int ucx_intcmp(void *i1, void *i2, void *data) {
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92 int a = *((int*) i1);
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93 int b = *((int*) i2);
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94 if (a == b) {
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95 return 0;
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96 } else {
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97 return a < b ? -1 : 1;
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98 }
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99 }
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100
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101 int ucx_floatcmp(void *f1, void *f2, void *epsilon) {
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102 float a = *((float*) f1);
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103 float b = *((float*) f2);
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104 float e = !epsilon ? 1e-6f : *((float*)epsilon);
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105 if (fabsf(a - b) < e) {
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106 return 0;
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107 } else {
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108 return a < b ? -1 : 1;
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109 }
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110 }
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111
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112 int ucx_doublecmp(void *d1, void *d2, void *epsilon) {
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113 double a = *((float*) d1);
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114 double b = *((float*) d2);
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115 double e = !epsilon ? 1e-14 : *((double*)epsilon);
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116 if (fabs(a - b) < e) {
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117 return 0;
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118 } else {
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119 return a < b ? -1 : 1;
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120 }
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121 }
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122
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123 int ucx_ptrcmp(void *ptr1, void *ptr2, void *data) {
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124 if (ptr1 == ptr2) {
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125 return 0;
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126 } else {
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127 return ptr1 < ptr2 ? -1 : 1;
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128 }
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129 }
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130
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131 int ucx_memcmp(void *ptr1, void *ptr2, void *n) {
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132 return memcmp(ptr1, ptr2, *((size_t*)n));
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133 }
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134
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135 /* PRINTF FUNCTIONS */
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136
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137 #ifdef va_copy
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138 #define UCX_PRINTF_BUFSIZE 256
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139 #else
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140 #pragma message("WARNING: C99 va_copy macro not supported by this platform" \
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141 " - limiting ucx_*printf to 2 KiB")
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142 #define UCX_PRINTF_BUFSIZE 0x800
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143 #endif
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144
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145 int ucx_fprintf(void *stream, write_func wfc, const char *fmt, ...) {
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146 int ret;
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147 va_list ap;
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148 va_start(ap, fmt);
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149 ret = ucx_vfprintf(stream, wfc, fmt, ap);
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150 va_end(ap);
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151 return ret;
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152 }
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153
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154 int ucx_vfprintf(void *stream, write_func wfc, const char *fmt, va_list ap) {
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155 char buf[UCX_PRINTF_BUFSIZE];
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156 #ifdef va_copy
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157 va_list ap2;
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158 va_copy(ap2, ap);
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159 int ret = vsnprintf(buf, UCX_PRINTF_BUFSIZE, fmt, ap);
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160 if (ret < 0) {
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161 return ret;
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162 } else if (ret < UCX_PRINTF_BUFSIZE) {
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163 return (int)wfc(buf, 1, ret, stream);
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164 } else {
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165 if (ret == INT_MAX) {
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166 errno = ENOMEM;
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167 return -1;
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168 }
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169
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170 int len = ret + 1;
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171 char *newbuf = (char*)malloc(len);
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172 if (!newbuf) {
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173 return -1;
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174 }
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175
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176 ret = vsnprintf(newbuf, len, fmt, ap2);
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177 if (ret > 0) {
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178 ret = (int)wfc(newbuf, 1, ret, stream);
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179 }
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180 free(newbuf);
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181 }
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182 return ret;
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183 #else
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184 int ret = vsnprintf(buf, UCX_PRINTF_BUFSIZE, fmt, ap);
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185 if (ret < 0) {
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186 return ret;
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187 } else if (ret < UCX_PRINTF_BUFSIZE) {
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188 return (int)wfc(buf, 1, ret, stream);
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189 } else {
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190 errno = ENOMEM;
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191 return -1;
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192 }
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193 #endif
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194 }
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195
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196 sstr_t ucx_asprintf(UcxAllocator *allocator, const char *fmt, ...) {
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197 va_list ap;
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198 sstr_t ret;
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199 va_start(ap, fmt);
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200 ret = ucx_vasprintf(allocator, fmt, ap);
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201 va_end(ap);
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202 return ret;
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203 }
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204
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205 sstr_t ucx_vasprintf(UcxAllocator *a, const char *fmt, va_list ap) {
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206 sstr_t s;
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207 s.ptr = NULL;
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208 s.length = 0;
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209 char buf[UCX_PRINTF_BUFSIZE];
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210 #ifdef va_copy
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211 va_list ap2;
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212 va_copy(ap2, ap);
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213 int ret = vsnprintf(buf, UCX_PRINTF_BUFSIZE, fmt, ap);
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214 if (ret > 0 && ret < UCX_PRINTF_BUFSIZE) {
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215 s.ptr = (char*)a->malloc(a->pool, ret + 1);
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216 s.length = (size_t)ret;
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217 memcpy(s.ptr, buf, ret);
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218 s.ptr[s.length] = '\0';
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219 } else if (ret == INT_MAX) {
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220 errno = ENOMEM;
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221 } else {
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222 int len = ret + 1;
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223 s.ptr = (char*)a->malloc(a->pool, len);
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224 ret = vsnprintf(s.ptr, len, fmt, ap2);
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225 if (ret < 0) {
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226 free(s.ptr);
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227 s.ptr = NULL;
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228 } else {
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229 s.length = (size_t)ret;
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230 }
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231 }
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232 #else
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233 int ret = vsnprintf(buf, UCX_PRINTF_BUFSIZE, fmt, ap);
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234 if (ret > 0 && ret < UCX_PRINTF_BUFSIZE) {
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235 s.ptr = (char*)a->malloc(a->pool, ret + 1);
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236 s.length = (size_t)ret;
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237 memcpy(s.ptr, buf, ret);
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238 s.ptr[s.length] = '\0';
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239 } else {
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240 errno = ENOMEM;
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241 }
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242 #endif
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243 return s;
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244 }

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