src/ucx/utils.h

Wed, 31 Aug 2016 16:20:58 +0200

author
Mike Becker <universe@uap-core.de>
date
Wed, 31 Aug 2016 16:20:58 +0200
changeset 57
eba880c1705c
parent 39
ac35daceb24c
permissions
-rw-r--r--

improves API and adds functions for strings

39
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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 /**
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30 * @file utils.h
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31 *
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32 * Compare, copy and printf functions.
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33 *
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34 * @author Mike Becker
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35 * @author Olaf Wintermann
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36 */
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37
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38 #ifndef UCX_UTILS_H
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39 #define UCX_UTILS_H
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40
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41 #ifdef __cplusplus
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42 extern "C" {
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43 #endif
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44
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45 #include "ucx.h"
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46 #include "string.h"
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47 #include "allocator.h"
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48 #include <inttypes.h>
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49 #include <string.h>
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50 #include <stdarg.h>
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51
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52 /**
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53 * Copies a string.
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54 * @param s the string to copy
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55 * @param data omitted
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56 * @return a pointer to a copy of s1 that can be passed to free(void*)
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57 */
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58 void *ucx_strcpy(void *s, void *data);
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59
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60 /**
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61 * Copies a memory area.
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62 * @param m a pointer to the memory area
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63 * @param n a pointer to the size_t containing the size of the memory area
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64 * @return a pointer to a copy of the specified memory area that can
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65 * be passed to free(void*)
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66 */
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67 void *ucx_memcpy(void *m, void *n);
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68
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69
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70 /**
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71 * Reads data from a stream and writes it to another stream.
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72 *
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73 * @param src the source stream
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74 * @param dest the destination stream
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75 * @param rfnc the read function
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76 * @param wfnc the write function
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77 * @param buf a pointer to the copy buffer or <code>NULL</code> if a buffer
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78 * shall be implicitly created on the heap
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79 * @param bufsize the size of the copy buffer - if <code>NULL</code> was
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80 * provided for <code>buf</code>, this is the size of the buffer that shall be
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81 * implicitly created
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82 * @param n the maximum number of bytes that shall be copied
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83 * @return the total number of bytes copied
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84 */
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85 size_t ucx_stream_copy(void *src, void *dest, read_func rfnc, write_func wfnc,
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86 char* buf, size_t bufsize, size_t n);
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87
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88 /**
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89 * Shorthand for ucx_stream_copy using the default copy buffer.
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90 *
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91 * @param src the source stream
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92 * @param dest the destination stream
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93 * @param rfnc the read function
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94 * @param wfnc the write function
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95 * @return total number of bytes copied
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96 */
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97 #define ucx_stream_hcopy(src,dest,rfnc,wfnc) ucx_stream_copy(\
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98 src, dest, (read_func)rfnc, (write_func)wfnc, NULL, 0x100, (size_t)-1)
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99
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100 /**
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101 * Shorthand for ucx_stream_copy using the default copy buffer and a copy limit.
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102 *
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103 * @param src the source stream
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104 * @param dest the destination stream
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105 * @param rfnc the read function
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106 * @param wfnc the write function
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107 * @param n maximum number of bytes that shall be copied
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108 * @return total number of bytes copied
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109 */
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110 #define ucx_stream_ncopy(src,dest,rfnc,wfnc, n) ucx_stream_copy(\
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111 src, dest, (read_func)rfnc, (write_func)wfnc, NULL, 0x100, n)
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112
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113 /**
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114 * Wraps the strcmp function.
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115 * @param s1 string one
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116 * @param s2 string two
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117 * @param data omitted
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118 * @return the result of strcmp(s1, s2)
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119 */
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120 int ucx_strcmp(void *s1, void *s2, void *data);
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121
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122 /**
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123 * Wraps the strncmp function.
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124 * @param s1 string one
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125 * @param s2 string two
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126 * @param n a pointer to the size_t containing the third strncmp parameter
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127 * @return the result of strncmp(s1, s2, *n)
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128 */
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129 int ucx_strncmp(void *s1, void *s2, void *n);
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130
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131 /**
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132 * Compares two integers of type int.
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133 * @param i1 pointer to integer one
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134 * @param i2 pointer to integer two
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135 * @param data omitted
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136 * @return -1, if *i1 is less than *i2, 0 if both are equal,
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137 * 1 if *i1 is greater than *i2
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138 */
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139 int ucx_intcmp(void *i1, void *i2, void *data);
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140
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141 /**
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142 * Compares two real numbers of type float.
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143 * @param f1 pointer to float one
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144 * @param f2 pointer to float two
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145 * @param data if provided: a pointer to precision (default: 1e-6f)
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146 * @return -1, if *f1 is less than *f2, 0 if both are equal,
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147 * 1 if *f1 is greater than *f2
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148 */
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149
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150 int ucx_floatcmp(void *f1, void *f2, void *data);
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151
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152 /**
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153 * Compares two real numbers of type double.
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154 * @param d1 pointer to double one
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155 * @param d2 pointer to double two
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156 * @param data if provided: a pointer to precision (default: 1e-14)
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157 * @return -1, if *d1 is less than *d2, 0 if both are equal,
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158 * 1 if *d1 is greater than *d2
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159 */
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160 int ucx_doublecmp(void *d1, void *d2, void *data);
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161
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162 /**
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163 * Compares two pointers.
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164 * @param ptr1 pointer one
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165 * @param ptr2 pointer two
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166 * @param data omitted
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167 * @return -1 if ptr1 is less than ptr2, 0 if both are equal,
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168 * 1 if ptr1 is greater than ptr2
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169 */
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170 int ucx_ptrcmp(void *ptr1, void *ptr2, void *data);
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171
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172 /**
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173 * Compares two memory areas.
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174 * @param ptr1 pointer one
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175 * @param ptr2 pointer two
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176 * @param n a pointer to the size_t containing the third parameter for memcmp
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177 * @return the result of memcmp(ptr1, ptr2, *n)
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178 */
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179 int ucx_memcmp(void *ptr1, void *ptr2, void *n);
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180
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181 /**
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182 * A <code>printf()</code> like function which writes the output to a stream by
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183 * using a write_func().
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184 * @param stream the stream the data is written to
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185 * @param wfc the write function
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186 * @param fmt format string
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187 * @param ... additional arguments
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188 * @return the total number of bytes written
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189 */
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190 int ucx_fprintf(void *stream, write_func wfc, const char *fmt, ...);
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191
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192 /**
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193 * <code>va_list</code> version of ucx_fprintf().
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194 * @param stream the stream the data is written to
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195 * @param wfc the write function
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196 * @param fmt format string
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197 * @param ap argument list
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198 * @return the total number of bytes written
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199 * @see ucx_fprintf()
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200 */
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201 int ucx_vfprintf(void *stream, write_func wfc, const char *fmt, va_list ap);
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202
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203 /**
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204 * A <code>printf()</code> like function which allocates space for a sstr_t
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205 * the result is written to.
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206 *
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207 * <b>Attention</b>: The sstr_t data is allocated with the allocators
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208 * ucx_allocator_malloc() function. So it is implementation dependent, if
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209 * the returned sstr_t.ptr pointer must be passed to the allocators
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210 * ucx_allocator_free() function manually.
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211 *
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212 * <b>Note</b>: The sstr_t.ptr of the return value will <i>always</i> be
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213 * <code>NULL</code>-terminated.
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214 *
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215 * @param allocator the UcxAllocator used for allocating the result sstr_t
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216 * @param fmt format string
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217 * @param ... additional arguments
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218 * @return a sstr_t containing the formatted string
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219 */
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220 sstr_t ucx_asprintf(UcxAllocator *allocator, const char *fmt, ...);
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221
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222 /** Shortcut for ucx_asprintf() with default allocator. */
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223 #define ucx_sprintf(fmt, ...) \
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224 ucx_asprintf(ucx_default_allocator(), fmt, __VA_ARGS__)
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225
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226 /**
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227 * <code>va_list</code> version of ucx_asprintf().
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228 *
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229 * @param allocator the UcxAllocator used for allocating the result sstr_t
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230 * @param fmt format string
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231 * @param ap argument list
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232 * @return a sstr_t containing the formatted string
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233 * @see ucx_asprintf()
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234 */
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235 sstr_t ucx_vasprintf(UcxAllocator *allocator, const char *fmt, va_list ap);
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236
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237 /**
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238 * A <code>printf()</code> like function which writes the output to an
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239 * UcxBuffer.
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240 *
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241 * @param buffer the buffer the data is written to
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242 * @param ... format string and additional arguments
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243 * @return the total number of bytes written
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244 * @see ucx_fprintf()
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245 */
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246 #define ucx_bprintf(buffer, ...) ucx_fprintf((UcxBuffer*)buffer, \
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247 (write_func)ucx_buffer_write, __VA_ARGS__)
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248
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249 #ifdef __cplusplus
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250 }
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251 #endif
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252
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253 #endif /* UCX_UTILS_H */
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254

mercurial