ucx/utils.c

Tue, 15 Mar 2016 11:21:30 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Tue, 15 Mar 2016 11:21:30 +0100
changeset 211
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parent 110
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child 255
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permissions
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dav list indicates locks

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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 2015 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 char *lbuf;
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58 size_t ncp = 0;
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59
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60 if(buf) {
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61 lbuf = buf;
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62 } else {
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63 lbuf = (char*)malloc(bufsize);
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64 if(lbuf == NULL) {
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65 return 0;
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66 }
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67 }
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68
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69 size_t r;
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70 size_t rn = bufsize > n ? n : bufsize;
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71 while((r = readfnc(lbuf, 1, rn, src)) != 0) {
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72 r = writefnc(lbuf, 1, r, dest);
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73 ncp += r;
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74 n -= r;
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75 rn = bufsize > n ? n : bufsize;
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76 if(r == 0 || n == 0) {
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77 break;
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78 }
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79 }
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80
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81 if (lbuf != buf) {
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82 free(lbuf);
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83 }
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84
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85 return ncp;
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86 }
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87
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88 /* COMPARE FUNCTIONS */
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89
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90 int ucx_strcmp(void *s1, void *s2, void *data) {
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91 return strcmp((char*)s1, (char*)s2);
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92 }
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93
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94 int ucx_strncmp(void *s1, void *s2, void *n) {
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95 return strncmp((char*)s1, (char*)s2, *((size_t*) n));
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96 }
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98 int ucx_intcmp(void *i1, void *i2, void *data) {
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99 int a = *((int*) i1);
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100 int b = *((int*) i2);
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101 if (a == b) {
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102 return 0;
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103 } else {
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104 return a < b ? -1 : 1;
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105 }
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106 }
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107
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108 int ucx_floatcmp(void *f1, void *f2, void *epsilon) {
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109 float a = *((float*) f1);
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110 float b = *((float*) f2);
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111 float e = !epsilon ? 1e-6f : *((float*)epsilon);
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112 if (fabsf(a - b) < e) {
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113 return 0;
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114 } else {
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115 return a < b ? -1 : 1;
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116 }
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117 }
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118
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119 int ucx_doublecmp(void *d1, void *d2, void *epsilon) {
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120 double a = *((float*) d1);
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121 double b = *((float*) d2);
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122 double e = !epsilon ? 1e-14 : *((double*)epsilon);
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123 if (fabs(a - b) < e) {
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124 return 0;
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125 } else {
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126 return a < b ? -1 : 1;
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127 }
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128 }
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129
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130 int ucx_ptrcmp(void *ptr1, void *ptr2, void *data) {
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131 intptr_t p1 = (intptr_t) ptr1;
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132 intptr_t p2 = (intptr_t) ptr2;
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133 if (p1 == p2) {
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134 return 0;
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135 } else {
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136 return p1 < p2 ? -1 : 1;
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137 }
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138 }
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139
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140 int ucx_memcmp(void *ptr1, void *ptr2, void *n) {
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141 return memcmp(ptr1, ptr2, *((size_t*)n));
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142 }
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143
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144 /* PRINTF FUNCTIONS */
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145
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146 #ifdef va_copy
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147 #define UCX_PRINTF_BUFSIZE 256
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148 #else
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149 #pragma message("WARNING: C99 va_copy macro not supported by this platform" \
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150 " - limiting ucx_*printf to 2 KiB")
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151 #define UCX_PRINTF_BUFSIZE 0x800
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152 #endif
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153
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154 int ucx_fprintf(void *stream, write_func wfc, const char *fmt, ...) {
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155 int ret;
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156 va_list ap;
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157 va_start(ap, fmt);
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158 ret = ucx_vfprintf(stream, wfc, fmt, ap);
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159 va_end(ap);
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160 return ret;
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161 }
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162
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163 int ucx_vfprintf(void *stream, write_func wfc, const char *fmt, va_list ap) {
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164 char buf[UCX_PRINTF_BUFSIZE];
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165 #ifdef va_copy
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166 va_list ap2;
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167 va_copy(ap2, ap);
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168 int ret = vsnprintf(buf, UCX_PRINTF_BUFSIZE, fmt, ap);
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169 if (ret < 0) {
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170 return ret;
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171 } else if (ret < UCX_PRINTF_BUFSIZE) {
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172 return (int)wfc(buf, 1, ret, stream);
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173 } else {
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174 if (ret == INT_MAX) {
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175 errno = ENOMEM;
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176 return -1;
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177 }
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178
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179 int len = ret + 1;
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180 char *newbuf = (char*)malloc(len);
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181 if (!newbuf) {
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182 return -1;
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183 }
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184
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185 ret = vsnprintf(newbuf, len, fmt, ap2);
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186 if (ret > 0) {
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187 ret = (int)wfc(newbuf, 1, ret, stream);
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188 }
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189 free(newbuf);
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190 }
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191 return ret;
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192 #else
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193 int ret = vsnprintf(buf, UCX_PRINTF_BUFSIZE, fmt, ap);
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194 if (ret < 0) {
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195 return ret;
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196 } else if (ret < UCX_PRINTF_BUFSIZE) {
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197 return (int)wfc(buf, 1, ret, stream);
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198 } else {
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199 errno = ENOMEM;
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200 return -1;
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201 }
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202 #endif
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203 }
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204
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205 sstr_t ucx_asprintf(UcxAllocator *allocator, const char *fmt, ...) {
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206 va_list ap;
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207 sstr_t ret;
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208 va_start(ap, fmt);
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209 ret = ucx_vasprintf(allocator, fmt, ap);
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210 va_end(ap);
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211 return ret;
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212 }
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213
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214 sstr_t ucx_vasprintf(UcxAllocator *a, const char *fmt, va_list ap) {
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215 sstr_t s;
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216 s.ptr = NULL;
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217 s.length = 0;
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218 char buf[UCX_PRINTF_BUFSIZE];
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219 #ifdef va_copy
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220 va_list ap2;
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221 va_copy(ap2, ap);
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222 int ret = vsnprintf(buf, UCX_PRINTF_BUFSIZE, fmt, ap);
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223 if (ret > 0 && ret < UCX_PRINTF_BUFSIZE) {
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224 s.ptr = (char*)almalloc(a, ret + 1);
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225 if (s.ptr) {
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226 s.length = (size_t)ret;
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227 memcpy(s.ptr, buf, ret);
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228 s.ptr[s.length] = '\0';
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229 }
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230 } else if (ret == INT_MAX) {
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231 errno = ENOMEM;
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232 } else {
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233 int len = ret + 1;
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234 s.ptr = (char*)almalloc(a, len);
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235 if (s.ptr) {
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236 ret = vsnprintf(s.ptr, len, fmt, ap2);
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237 if (ret < 0) {
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238 free(s.ptr);
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239 s.ptr = NULL;
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240 } else {
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241 s.length = (size_t)ret;
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242 }
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243 }
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244 }
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245 #else
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246 int ret = vsnprintf(buf, UCX_PRINTF_BUFSIZE, fmt, ap);
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247 if (ret > 0 && ret < UCX_PRINTF_BUFSIZE) {
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248 s.ptr = (char*)almalloc(a, ret + 1);
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249 if (s.ptr) {
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250 s.length = (size_t)ret;
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251 memcpy(s.ptr, buf, ret);
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252 s.ptr[s.length] = '\0';
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253 }
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254 } else {
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255 errno = ENOMEM;
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256 }
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257 #endif
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258 return s;
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259 }

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