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annotate th_ioctx.c @ 204:55f429dff750

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Add th_io_fopen() helper function.
author Matti Hamalainen <ccr@tnsp.org>
date Thu, 11 Feb 2016 23:14:54 +0200
parents b392293047da
children c2193323736d
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1 /*
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2 * Standard I/O context helpers
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3 * Programmed and designed by Matti 'ccr' Hamalainen
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4 * (C) Copyright 2012,2016 Tecnic Software productions (TNSP)
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5 *
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6 * Please read file 'COPYING' for information on license and distribution.
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7 */
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8 #include "th_ioctx.h"
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9 #include "th_string.h"
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10 #include "th_endian.h"
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11 #include <stdio.h>
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12
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13
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14 th_ioctx *th_io_new(const th_ioctx_ops *fops)
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15 {
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16 th_ioctx *ctx = th_malloc0(sizeof(th_ioctx));
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17 if (ctx == NULL)
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18 return NULL;
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19
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20 ctx->fops = fops;
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21
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22 return ctx;
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23 }
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25
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26 int th_io_open(th_ioctx *ctx, const char *filename, const char *mode)
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27 {
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28 if (ctx == NULL)
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29 return THERR_NULLPTR;
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30
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31 ctx->filename = th_strdup(filename);
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32 ctx->mode = th_strdup(mode);
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33
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34 if (ctx->fops->fopen != NULL)
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35 ctx->errno = ctx->fops->fopen(ctx);
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36
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37 return ctx->errno;
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38 }
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40
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41 th_ioctx * th_io_fopen(const th_ioctx_ops *fops, const char *filename, const char *mode)
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42 {
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43 th_ioctx *ctx = th_io_new(fops);
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44 if (ctx == NULL)
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45 return NULL;
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46
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47 if (th_io_open(ctx, filename, mode) != THERR_OK)
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48 {
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49 th_io_free(ctx);
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50 return NULL;
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51 }
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52
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53 return ctx;
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54 }
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55
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56
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57 void th_io_close(th_ioctx *ctx)
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58 {
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59 if (ctx != NULL)
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60 {
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61 if (ctx->fops->fclose != NULL)
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62 ctx->fops->fclose(ctx);
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63 }
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64 }
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67 void th_io_free(th_ioctx *ctx)
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68 {
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69 if (ctx != NULL)
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70 {
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71 th_io_close(ctx);
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72
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73 th_free_r(&ctx->filename);
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74 th_free_r(&ctx->mode);
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75
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76 th_free(ctx);
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77 }
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78 }
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81 BOOL th_io_set_handlers(th_ioctx *ctx,
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82 void (*error)(th_ioctx *, const int, const char *msg),
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83 void (*msg)(th_ioctx *, const int, const char *msg))
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84 {
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85 if (ctx == NULL)
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86 return FALSE;
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87
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88 ctx->error = error;
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89 ctx->msg = msg;
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90
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91 return TRUE;
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92 }
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93
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94
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95 void th_io_error_v(th_ioctx *ctx, const int err, const char *fmt, va_list ap)
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96 {
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97 char *msg = th_strdup_vprintf(fmt, ap);
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98
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99 if (ctx->error != NULL)
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100 ctx->error((struct th_ioctx *) ctx, err, msg);
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101 else
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102 THERR("'%s' #%" TH_PRIu_SIZE_T ": %s\n", ctx->filename, ctx->line, msg);
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103
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104 th_free(msg);
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105 }
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106
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107
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108 void th_io_error(th_ioctx *ctx, const int err, const char *fmt, ...)
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109 {
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110 va_list ap;
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111 va_start(ap, fmt);
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112 th_io_error_v(ctx, err, fmt, ap);
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113 va_end(ap);
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114 }
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115
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116
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117 void th_io_msg_v(th_ioctx *ctx, const int level, const char *fmt, va_list ap)
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118 {
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119 if (ctx->msg != NULL)
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120 {
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121 char *msg = th_strdup_vprintf(fmt, ap);
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122 ctx->msg((struct th_ioctx *) ctx, level, msg);
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123 th_free(msg);
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124 }
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125 else
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126 THMSG_V(level, fmt, ap);
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127 }
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128
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129
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130 void th_io_msg(th_ioctx *ctx, const int level, const char *fmt, ...)
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131 {
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132 va_list ap;
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133 va_start(ap, fmt);
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134 th_io_msg_v(ctx, level, fmt, ap);
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135 va_end(ap);
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136 }
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137
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138
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139 int thfreset(th_ioctx *ctx)
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140 {
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diff changeset
141 if (ctx == NULL)
202
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diff changeset
142 return THERR_NULLPTR;
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diff changeset
143
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diff changeset
144 if (ctx->fops == NULL || ctx->fops->freset == NULL)
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parents: 166
diff changeset
145 return THERR_OK;
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parents: 166
diff changeset
146
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diff changeset
147 return ctx->fops->freset(ctx);
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diff changeset
148 }
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diff changeset
149
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diff changeset
150
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diff changeset
151 int thferror(th_ioctx *ctx)
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diff changeset
152 {
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153 ctx->atime = time(NULL);
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154 return ctx->fops->ferror(ctx);
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diff changeset
155 }
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diff changeset
156
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diff changeset
157
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158 int thfseek(th_ioctx *ctx, const off_t offset, int whence)
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159 {
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160 ctx->atime = time(NULL);
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161 return ctx->fops->fseek(ctx, offset, whence);
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162 }
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parents: 166
diff changeset
163
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parents: 166
diff changeset
164
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diff changeset
165 off_t thfsize(th_ioctx *ctx)
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parents: 166
diff changeset
166 {
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167 ctx->atime = time(NULL);
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diff changeset
168 return ctx->fops->fsize(ctx);
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parents: 166
diff changeset
169 }
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diff changeset
170
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171
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diff changeset
172 off_t thftell(th_ioctx *ctx)
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173 {
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174 ctx->atime = time(NULL);
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175 return ctx->fops->ftell(ctx);
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176 }
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diff changeset
177
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178
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179 BOOL thfeof(th_ioctx *ctx)
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180 {
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181 ctx->atime = time(NULL);
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182 return ctx->fops->feof(ctx);
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183 }
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184
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185
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186 int thfgetc(th_ioctx *ctx)
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187 {
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188 ctx->atime = time(NULL);
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189 return ctx->fops->fgetc(ctx);
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190 }
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diff changeset
191
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diff changeset
192
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diff changeset
193 int thfputc(int v, th_ioctx *ctx)
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194 {
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195 ctx->atime = time(NULL);
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diff changeset
196 return ctx->fops->fputc(v, ctx);
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diff changeset
197 }
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diff changeset
198
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199
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200 size_t thfread(void *ptr, size_t size, size_t nmemb, th_ioctx *ctx)
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diff changeset
201 {
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diff changeset
202 ctx->atime = time(NULL);
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diff changeset
203 return ctx->fops->fread(ptr, size, nmemb, ctx);
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diff changeset
204 }
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diff changeset
205
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diff changeset
206
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diff changeset
207 size_t thfwrite(const void *ptr, size_t size, size_t nmemb, th_ioctx *ctx)
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diff changeset
208 {
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diff changeset
209 ctx->atime = time(NULL);
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diff changeset
210 return ctx->fops->fwrite(ptr, size, nmemb, ctx);
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diff changeset
211 }
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diff changeset
212
b392293047da Refactor I/O contexts. Breaks API and all that.
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diff changeset
213
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diff changeset
214 char *thfgets(char *str, int size, th_ioctx *ctx)
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diff changeset
215 {
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diff changeset
216 char *ptr = str, *end = str + size - 1, c;
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diff changeset
217
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diff changeset
218 if (size <= 0)
67
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diff changeset
219 return NULL;
202
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diff changeset
220
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diff changeset
221 while (ptr < end && (c = ctx->fops->fgetc(ctx)) != EOF)
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parents: 166
diff changeset
222 {
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diff changeset
223 *ptr++ = c;
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diff changeset
224 if (c == '\n')
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diff changeset
225 break;
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diff changeset
226 }
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diff changeset
227 *ptr++ = 0;
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diff changeset
228
b392293047da Refactor I/O contexts. Breaks API and all that.
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diff changeset
229 return (ptr > str) ? str : NULL;
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parents: 166
diff changeset
230 }
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
231
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
232
b392293047da Refactor I/O contexts. Breaks API and all that.
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diff changeset
233 BOOL thfread_str(th_ioctx *ctx, void *ptr, const size_t len)
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parents: 166
diff changeset
234 {
b392293047da Refactor I/O contexts. Breaks API and all that.
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diff changeset
235 return (thfread(ptr, sizeof(uint8_t), len, ctx) == len);
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parents: 166
diff changeset
236 }
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parents: 166
diff changeset
237
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
238
b392293047da Refactor I/O contexts. Breaks API and all that.
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diff changeset
239 BOOL thfread_byte(th_ioctx *ctx, uint8_t *val)
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parents: 166
diff changeset
240 {
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
241 return (thfread(val, sizeof(uint8_t), 1, ctx) == 1);
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Matti Hamalainen <ccr@tnsp.org>
parents: 166
diff changeset
242 }
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
243
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
244
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
245 BOOL thfwrite_str(th_ioctx *ctx, const void *ptr, const size_t len)
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
246 {
b392293047da Refactor I/O contexts. Breaks API and all that.
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diff changeset
247 return (thfwrite(ptr, sizeof(uint8_t), len, ctx) == len);
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parents: 166
diff changeset
248 }
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
249
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
250
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
251 BOOL thfwrite_byte(th_ioctx *ctx, const uint8_t val)
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
252 {
b392293047da Refactor I/O contexts. Breaks API and all that.
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diff changeset
253 return (thfwrite(&val, sizeof(uint8_t), 1, ctx) == 1);
67
d94af48cef7b Added new module, a simple I/O context helper.
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parents:
diff changeset
254 }
d94af48cef7b Added new module, a simple I/O context helper.
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parents:
diff changeset
255
d94af48cef7b Added new module, a simple I/O context helper.
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parents:
diff changeset
256
202
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diff changeset
257 //
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diff changeset
258 // File routines for endian-dependant data
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diff changeset
259 //
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diff changeset
260 #define TH_DEFINE_FUNC(xname, xtype, xmacro) \
b392293047da Refactor I/O contexts. Breaks API and all that.
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diff changeset
261 BOOL thfread_ ## xname (th_ioctx *ctx, xtype *v) \
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
262 { \
b392293047da Refactor I/O contexts. Breaks API and all that.
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diff changeset
263 xtype result; \
b392293047da Refactor I/O contexts. Breaks API and all that.
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diff changeset
264 if (thfread(&result, sizeof( xtype ), 1, ctx) != 1) \
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
265 return FALSE; \
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
266 *v = TH_ ## xmacro ## _TO_NATIVE (result); \
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
267 return TRUE; \
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
268 } \
b392293047da Refactor I/O contexts. Breaks API and all that.
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diff changeset
269 \
b392293047da Refactor I/O contexts. Breaks API and all that.
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diff changeset
270 BOOL thfwrite_ ## xname (th_ioctx *ctx, const xtype v) \
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
271 { \
b392293047da Refactor I/O contexts. Breaks API and all that.
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diff changeset
272 xtype result = TH_NATIVE_TO_ ## xmacro (v); \
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
273 if (thfwrite(&result, sizeof( xtype ), 1, ctx) != 1) \
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
274 return FALSE; \
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
275 return TRUE; \
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parents: 166
diff changeset
276 }
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
277
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
278
b392293047da Refactor I/O contexts. Breaks API and all that.
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diff changeset
279 TH_DEFINE_FUNC(le16, uint16_t, LE16)
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
280 TH_DEFINE_FUNC(le32, uint32_t, LE32)
b392293047da Refactor I/O contexts. Breaks API and all that.
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parents: 166
diff changeset
281
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282 TH_DEFINE_FUNC(be16, uint16_t, BE16)
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283 TH_DEFINE_FUNC(be32, uint32_t, BE32)
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284
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285 #ifdef TH_HAVE_64BIT
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286 TH_DEFINE_FUNC(le64, uint64_t, LE64)
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287 TH_DEFINE_FUNC(be64, uint64_t, BE64)
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288 #endif
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289
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290 #undef TH_DEFINE_FUNC
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291
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292
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293 //
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294 // stdio wrappers for I/O contexts
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295 //
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296 #define CTX_FH ((FILE *) ctx->data)
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297
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298
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299 static int th_stdio_fopen(th_ioctx *ctx)
67
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300 {
202
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301 ctx->data = (void *) fopen(ctx->filename, ctx->mode);
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302 ctx->errno = th_get_error();
204
55f429dff750 Add th_io_fopen() helper function.
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303 return (ctx->data != NULL) ? THERR_OK : THERR_FOPEN;
202
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304 }
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305
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306
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307 static void th_stdio_fclose(th_ioctx *ctx)
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308 {
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309 if (CTX_FH != NULL)
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310 {
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311 fclose(CTX_FH);
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312 ctx->data = NULL;
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313 }
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314 }
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315
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316
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317 static int th_stdio_ferror(th_ioctx *ctx)
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318 {
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319 return ctx->errno;
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320 }
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321
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322
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323 static off_t th_stdio_ftell(th_ioctx *ctx)
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324 {
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325 return ftello(CTX_FH);
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326 }
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327
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328
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329 static int th_stdio_fseek(th_ioctx *ctx, const off_t pos, const int whence)
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330 {
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331 int ret = fseeko(CTX_FH, pos, whence);
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332 ctx->errno = th_get_error();
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333 return ret;
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334 }
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335
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336
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diff changeset
337 static int th_stdio_freset(th_ioctx *ctx)
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diff changeset
338 {
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339 if (CTX_FH != NULL)
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340 return th_stdio_fseek(ctx, 0, SEEK_SET);
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341 else
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342 return THERR_OK;
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343 }
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344
67
d94af48cef7b Added new module, a simple I/O context helper.
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345
202
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346 static off_t th_stdio_fsize(th_ioctx *ctx)
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347 {
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348 off_t savePos, fileSize;
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349
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350 // Check if the size is cached
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351 if (ctx->size != 0)
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352 return ctx->size;
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353
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354 // Get file size
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355 if ((savePos = th_stdio_ftell(ctx)) < 0)
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356 return -1;
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diff changeset
357
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diff changeset
358 if (th_stdio_fseek(ctx, 0, SEEK_END) != 0)
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359 return -1;
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diff changeset
360
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diff changeset
361 if ((fileSize = th_stdio_ftell(ctx)) < 0)
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diff changeset
362 return -1;
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diff changeset
363
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diff changeset
364 if (th_stdio_fseek(ctx, savePos, SEEK_SET) != 0)
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365 return -1;
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diff changeset
366
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367 ctx->size = fileSize;
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368 return fileSize;
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diff changeset
369 }
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diff changeset
370
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diff changeset
371
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372 static BOOL th_stdio_feof(th_ioctx *ctx)
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diff changeset
373 {
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374 return feof(CTX_FH);
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diff changeset
375 }
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diff changeset
376
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diff changeset
377
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diff changeset
378 static int th_stdio_fgetc(th_ioctx *ctx)
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diff changeset
379 {
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diff changeset
380 int ret = fgetc(CTX_FH);
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diff changeset
381 ctx->errno = th_get_error();
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diff changeset
382 return ret;
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diff changeset
383 }
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diff changeset
384
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diff changeset
385
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diff changeset
386 static int th_stdio_fputc(int v, th_ioctx *ctx)
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diff changeset
387 {
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diff changeset
388 int ret = fputc(v, CTX_FH);
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diff changeset
389 ctx->errno = th_get_error();
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diff changeset
390 return ret;
67
d94af48cef7b Added new module, a simple I/O context helper.
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parents:
diff changeset
391 }
202
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diff changeset
392
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diff changeset
393
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diff changeset
394 static size_t th_stdio_fread(void *ptr, size_t size, size_t nmemb, th_ioctx *ctx)
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diff changeset
395 {
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diff changeset
396 size_t ret = fread(ptr, size, nmemb, CTX_FH);
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diff changeset
397 ctx->errno = th_get_error();
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diff changeset
398 return ret;
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diff changeset
399 }
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diff changeset
400
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diff changeset
401
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diff changeset
402 static size_t th_stdio_fwrite(const void *ptr, size_t size, size_t nmemb, th_ioctx *ctx)
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diff changeset
403 {
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diff changeset
404 size_t ret = fwrite(ptr, size, nmemb, CTX_FH);
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diff changeset
405 ctx->errno = th_get_error();
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diff changeset
406 return ret;
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parents: 166
diff changeset
407 }
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parents: 166
diff changeset
408
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parents: 166
diff changeset
409
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diff changeset
410 static int th_stdio_vfprintf(th_ioctx *ctx, const char *format, va_list ap)
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parents: 166
diff changeset
411 {
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diff changeset
412 int ret = vfprintf(CTX_FH, format, ap);
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diff changeset
413 ctx->errno = th_get_error();
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parents: 166
diff changeset
414 return ret;
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Matti Hamalainen <ccr@tnsp.org>
parents: 166
diff changeset
415 }
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parents: 166
diff changeset
416
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parents: 166
diff changeset
417
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diff changeset
418 const th_ioctx_ops th_stdio_io_ops =
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diff changeset
419 {
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diff changeset
420 "stdio",
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diff changeset
421
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diff changeset
422 th_stdio_fopen,
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diff changeset
423 th_stdio_fclose,
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parents: 166
diff changeset
424
b392293047da Refactor I/O contexts. Breaks API and all that.
Matti Hamalainen <ccr@tnsp.org>
parents: 166
diff changeset
425 th_stdio_freset,
b392293047da Refactor I/O contexts. Breaks API and all that.
Matti Hamalainen <ccr@tnsp.org>
parents: 166
diff changeset
426 th_stdio_ferror,
b392293047da Refactor I/O contexts. Breaks API and all that.
Matti Hamalainen <ccr@tnsp.org>
parents: 166
diff changeset
427 th_stdio_fseek,
b392293047da Refactor I/O contexts. Breaks API and all that.
Matti Hamalainen <ccr@tnsp.org>
parents: 166
diff changeset
428 th_stdio_fsize,
b392293047da Refactor I/O contexts. Breaks API and all that.
Matti Hamalainen <ccr@tnsp.org>
parents: 166
diff changeset
429 th_stdio_ftell,
b392293047da Refactor I/O contexts. Breaks API and all that.
Matti Hamalainen <ccr@tnsp.org>
parents: 166
diff changeset
430 th_stdio_feof,
b392293047da Refactor I/O contexts. Breaks API and all that.
Matti Hamalainen <ccr@tnsp.org>
parents: 166
diff changeset
431 th_stdio_fgetc,
b392293047da Refactor I/O contexts. Breaks API and all that.
Matti Hamalainen <ccr@tnsp.org>
parents: 166
diff changeset
432 th_stdio_fputc,
b392293047da Refactor I/O contexts. Breaks API and all that.
Matti Hamalainen <ccr@tnsp.org>
parents: 166
diff changeset
433 th_stdio_fread,
b392293047da Refactor I/O contexts. Breaks API and all that.
Matti Hamalainen <ccr@tnsp.org>
parents: 166
diff changeset
434 th_stdio_fwrite,
b392293047da Refactor I/O contexts. Breaks API and all that.
Matti Hamalainen <ccr@tnsp.org>
parents: 166
diff changeset
435
b392293047da Refactor I/O contexts. Breaks API and all that.
Matti Hamalainen <ccr@tnsp.org>
parents: 166
diff changeset
436 th_stdio_vfprintf,
b392293047da Refactor I/O contexts. Breaks API and all that.
Matti Hamalainen <ccr@tnsp.org>
parents: 166
diff changeset
437 };
b392293047da Refactor I/O contexts. Breaks API and all that.
Matti Hamalainen <ccr@tnsp.org>
parents: 166
diff changeset
438