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annotate th_ioctx_stdio.c @ 691:49c818acbbbe

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Cleanups.
author Matti Hamalainen <ccr@tnsp.org>
date Mon, 09 Mar 2020 16:22:01 +0200
parents 7e207f1023d9
children 4ca6a3b30fe8
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1 /*
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2 * Simple I/O abstraction and context handling layer
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3 * Programmed and designed by Matti 'ccr' Hamalainen
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4 * (C) Copyright 2012-2020 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 <stdio.h>
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10
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11 #define CTX_FH ((FILE *) ctx->data)
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12
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13
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14 static int th_stdio_fopen(th_ioctx *ctx)
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15 {
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16 ctx->data = (void *) fopen(ctx->filename, ctx->mode);
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17 ctx->status = th_get_error();
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18 return (ctx->data != NULL) ? THERR_OK : THERR_FOPEN;
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19 }
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20
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21
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22 static void th_stdio_fclose(th_ioctx *ctx)
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23 {
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24 if (CTX_FH != NULL)
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25 {
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26 fclose(CTX_FH);
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27 ctx->data = NULL;
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28 }
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29 }
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30
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31
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32 static int th_stdio_ferror(th_ioctx *ctx)
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33 {
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34 return ctx->status;
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35 }
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36
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37
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38 static off_t th_stdio_ftell(th_ioctx *ctx)
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39 {
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40 return ftello(CTX_FH);
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41 }
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42
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43
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44 static int th_stdio_fseek(th_ioctx *ctx, const off_t pos, const int whence)
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45 {
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46 int ret = fseeko(CTX_FH, pos, whence);
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47 ctx->status = th_get_error();
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48 return ret;
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49 }
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50
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51
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52 static int th_stdio_freset(th_ioctx *ctx)
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53 {
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54 return th_stdio_fseek(ctx, 0, SEEK_SET);
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55 }
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56
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57
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58 static off_t th_stdio_fsize(th_ioctx *ctx)
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59 {
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60 off_t savePos, fileSize;
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61
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62 // Check if the size is cached
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63 if (ctx->size != 0)
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64 return ctx->size;
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65
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66 // Get file size
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67 if ((savePos = th_stdio_ftell(ctx)) < 0)
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68 return -1;
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69
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70 if (th_stdio_fseek(ctx, 0, SEEK_END) != 0)
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71 return -1;
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72
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73 if ((fileSize = th_stdio_ftell(ctx)) < 0)
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74 return -1;
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75
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76 if (th_stdio_fseek(ctx, savePos, SEEK_SET) != 0)
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77 return -1;
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78
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79 ctx->size = fileSize;
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80 return fileSize;
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81 }
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82
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83
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84 static BOOL th_stdio_feof(th_ioctx *ctx)
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85 {
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86 return feof(CTX_FH);
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87 }
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88
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89
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90 static int th_stdio_fgetc(th_ioctx *ctx)
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91 {
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92 int ret = fgetc(CTX_FH);
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93 ctx->status = th_get_error();
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94 return ret;
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95 }
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96
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97
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98 static int th_stdio_fputc(int v, th_ioctx *ctx)
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99 {
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100 int ret = fputc(v, CTX_FH);
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101 ctx->status = th_get_error();
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102 return ret;
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103 }
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104
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105
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106 static size_t th_stdio_fread(void *ptr, size_t size, size_t nmemb, th_ioctx *ctx)
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107 {
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108 size_t ret = fread(ptr, size, nmemb, CTX_FH);
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109 ctx->status = th_get_error();
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110 return ret;
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111 }
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112
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113
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114 static size_t th_stdio_fwrite(const void *ptr, size_t size, size_t nmemb, th_ioctx *ctx)
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115 {
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116 size_t ret = fwrite(ptr, size, nmemb, CTX_FH);
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117 ctx->status = th_get_error();
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118 return ret;
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119 }
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120
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121
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122 static char * th_stdio_fgets(char *str, int size, th_ioctx *ctx)
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123 {
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124 char *ret = fgets(str, size, CTX_FH);
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125 ctx->status = th_get_error();
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126 return ret;
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127 }
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128
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129
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130 static int th_stdio_fputs(const char *str, th_ioctx *ctx)
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131 {
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132 int ret = fputs(str, CTX_FH);
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133 ctx->status = th_get_error();
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134 return ret;
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135 }
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136
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137
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138 static int th_stdio_vfprintf(th_ioctx *ctx, const char *fmt, va_list ap)
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139 {
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140 int ret = vfprintf(CTX_FH, fmt, ap);
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141 ctx->status = th_get_error();
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142 return ret;
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143 }
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144
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145
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146 const th_ioctx_ops th_stdio_io_ops =
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147 {
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148 "stdio",
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149
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150 th_stdio_fopen,
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151 th_stdio_fclose,
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152
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153 th_stdio_freset,
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154 th_stdio_ferror,
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155 th_stdio_fseek,
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156 th_stdio_fsize,
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157 th_stdio_ftell,
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158 th_stdio_feof,
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159 th_stdio_fgetc,
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160 th_stdio_fputc,
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161 th_stdio_fread,
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162 th_stdio_fwrite,
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163
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164 th_stdio_fgets,
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165 th_stdio_fputs,
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166 th_stdio_vfprintf,
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167 };