Fri, 01 Jun 2018 09:23:51 +0200
dav-sync pull applies config tag filter now
also changes, that include/exclude filters never lead to file deletion
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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 2017 Mike Becker, 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 "ucx/buffer.h" |
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30 | |
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31 | #include <stdarg.h> |
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32 | #include <stdlib.h> |
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33 | #include <string.h> |
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34 | |
70 | 35 | UcxBuffer *ucx_buffer_new(void *space, size_t capacity, int flags) { |
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36 | UcxBuffer *buffer = (UcxBuffer*) malloc(sizeof(UcxBuffer)); |
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37 | if (buffer) { |
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38 | buffer->flags = flags; |
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39 | if (!space) { |
70 | 40 | buffer->space = (char*)malloc(capacity); |
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41 | if (!buffer->space) { |
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42 | free(buffer); |
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43 | return NULL; |
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44 | } |
70 | 45 | memset(buffer->space, 0, capacity); |
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46 | buffer->flags |= UCX_BUFFER_AUTOFREE; |
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47 | } else { |
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48 | buffer->space = (char*)space; |
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49 | } |
70 | 50 | buffer->capacity = capacity; |
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51 | buffer->size = 0; |
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52 | |
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53 | buffer->pos = 0; |
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54 | } |
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55 | |
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56 | return buffer; |
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57 | } |
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58 | |
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59 | void ucx_buffer_free(UcxBuffer *buffer) { |
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60 | if ((buffer->flags & UCX_BUFFER_AUTOFREE) == UCX_BUFFER_AUTOFREE) { |
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61 | free(buffer->space); |
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62 | } |
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63 | free(buffer); |
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64 | } |
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65 | |
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66 | UcxBuffer* ucx_buffer_extract( |
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67 | UcxBuffer *src, size_t start, size_t length, int flags) { |
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68 | if (src->size == 0 || length == 0 || |
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69 | ((size_t)-1) - start < length || start+length > src->capacity) |
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70 | { |
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71 | return NULL; |
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72 | } |
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73 | |
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74 | UcxBuffer *dst = (UcxBuffer*) malloc(sizeof(UcxBuffer)); |
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75 | if (dst) { |
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76 | dst->space = (char*)malloc(length); |
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77 | if (!dst->space) { |
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78 | free(dst); |
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79 | return NULL; |
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80 | } |
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81 | dst->capacity = length; |
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82 | dst->size = length; |
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83 | dst->flags = flags | UCX_BUFFER_AUTOFREE; |
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84 | dst->pos = 0; |
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85 | memcpy(dst->space, src->space+start, length); |
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86 | } |
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87 | return dst; |
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88 | } |
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89 | |
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90 | int ucx_buffer_seek(UcxBuffer *buffer, off_t offset, int whence) { |
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91 | size_t npos; |
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92 | switch (whence) { |
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93 | case SEEK_CUR: |
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94 | npos = buffer->pos; |
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95 | break; |
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96 | case SEEK_END: |
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97 | npos = buffer->size; |
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98 | break; |
70 | 99 | case SEEK_SET: |
100 | npos = 0; | |
101 | break; | |
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102 | default: |
70 | 103 | return -1; |
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104 | } |
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105 | |
70 | 106 | size_t opos = npos; |
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107 | npos += offset; |
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108 | |
70 | 109 | if ((offset > 0 && npos < opos) || (offset < 0 && npos > opos)) { |
110 | return -1; | |
111 | } | |
112 | ||
113 | if (npos >= buffer->size) { | |
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114 | return -1; |
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115 | } else { |
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116 | buffer->pos = npos; |
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117 | return 0; |
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118 | } |
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119 | |
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120 | } |
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121 | |
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122 | int ucx_buffer_eof(UcxBuffer *buffer) { |
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123 | return buffer->pos >= buffer->size; |
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124 | } |
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125 | |
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126 | int ucx_buffer_extend(UcxBuffer *buffer, size_t len) { |
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127 | size_t newcap = buffer->capacity; |
70 | 128 | |
129 | if (buffer->capacity + len < buffer->capacity) { | |
130 | return -1; | |
131 | } | |
132 | ||
133 | while (buffer->capacity + len > newcap) { | |
134 | newcap <<= 1; | |
135 | if (newcap < buffer->capacity) { | |
136 | return -1; | |
137 | } | |
138 | } | |
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139 | |
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140 | char *newspace = (char*)realloc(buffer->space, newcap); |
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141 | if (newspace) { |
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142 | memset(newspace+buffer->size, 0, newcap-buffer->size); |
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143 | buffer->space = newspace; |
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144 | buffer->capacity = newcap; |
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145 | } else { |
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146 | return -1; |
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147 | } |
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148 | |
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149 | return 0; |
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150 | } |
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151 | |
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152 | size_t ucx_buffer_write(const void *ptr, size_t size, size_t nitems, |
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153 | UcxBuffer *buffer) { |
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154 | size_t len = size * nitems; |
70 | 155 | size_t required = buffer->pos + len; |
156 | if (buffer->pos > required) { | |
157 | return 0; | |
158 | } | |
159 | ||
160 | if (required > buffer->capacity) { | |
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161 | if ((buffer->flags & UCX_BUFFER_AUTOEXTEND) == UCX_BUFFER_AUTOEXTEND) { |
70 | 162 | if (ucx_buffer_extend(buffer, required - buffer->capacity)) { |
163 | return 0; | |
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164 | } |
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165 | } else { |
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166 | len = buffer->capacity - buffer->pos; |
70 | 167 | if (size > 1) { |
168 | len -= len%size; | |
169 | } | |
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170 | } |
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171 | } |
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172 | |
70 | 173 | if (len == 0) { |
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174 | return len; |
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175 | } |
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176 | |
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177 | memcpy(buffer->space + buffer->pos, ptr, len); |
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178 | buffer->pos += len; |
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179 | if(buffer->pos > buffer->size) { |
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180 | buffer->size = buffer->pos; |
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181 | } |
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182 | |
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183 | return len / size; |
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184 | } |
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185 | |
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186 | size_t ucx_buffer_read(void *ptr, size_t size, size_t nitems, |
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187 | UcxBuffer *buffer) { |
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188 | size_t len = size * nitems; |
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189 | if (buffer->pos + len > buffer->size) { |
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190 | len = buffer->size - buffer->pos; |
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191 | if (size > 1) len -= len%size; |
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192 | } |
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193 | |
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194 | if (len <= 0) { |
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195 | return len; |
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196 | } |
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197 | |
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198 | memcpy(ptr, buffer->space + buffer->pos, len); |
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199 | buffer->pos += len; |
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200 | |
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201 | return len / size; |
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202 | } |
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203 | |
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204 | int ucx_buffer_putc(UcxBuffer *buffer, int c) { |
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205 | if(buffer->pos >= buffer->capacity) { |
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206 | if ((buffer->flags & UCX_BUFFER_AUTOEXTEND) == UCX_BUFFER_AUTOEXTEND) { |
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207 | if(ucx_buffer_extend(buffer, 1)) { |
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208 | return EOF; |
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209 | } |
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210 | } else { |
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211 | return EOF; |
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212 | } |
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213 | } |
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214 | |
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215 | c &= 0xFF; |
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216 | buffer->space[buffer->pos] = (char) c; |
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217 | buffer->pos++; |
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218 | if(buffer->pos > buffer->size) { |
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219 | buffer->size = buffer->pos; |
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220 | } |
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221 | return c; |
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222 | } |
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223 | |
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224 | int ucx_buffer_getc(UcxBuffer *buffer) { |
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225 | if (ucx_buffer_eof(buffer)) { |
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226 | return EOF; |
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227 | } else { |
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228 | int c = buffer->space[buffer->pos]; |
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229 | buffer->pos++; |
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230 | return c; |
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231 | } |
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232 | } |
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233 | |
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234 | size_t ucx_buffer_puts(UcxBuffer *buffer, char *str) { |
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235 | return ucx_buffer_write((const void*)str, 1, strlen(str), buffer); |
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236 | } |