annotate th_ioctx.h @ 695:a04b8fe158b9

Add helper function th_io_reopen().
author Matti Hamalainen <ccr@tnsp.org>
date Mon, 09 Mar 2020 19:05:58 +0200
parents 0fc5ddaccc57
children ec8fe89576ff
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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 /// @file
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9 /// @brief Simple I/O abstraction and context handling layer
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10 #ifndef TH_IOCTX_H
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11 #define TH_IOCTX_H
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12
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13 #include "th_util.h"
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14 #include <time.h>
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16
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17 #ifdef __cplusplus
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18 extern "C" {
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19 #endif
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22 //
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23 // Typedefs and structures
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24 //
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25 struct th_ioctx;
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26 struct th_ioctx_ops;
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29 /** I/O context structure
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30 */
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31 typedef struct th_ioctx
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32 {
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33 char *filename; ///< Context filename, if any. May be NULL.
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34 BOOL fallocated; ///< TRUE if filename is allocated, FALSE if "const"
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35 char *mode; ///< Context's stdio open "mode", may also be NULL.
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36 BOOL mallocated; ///< TRUE if mode string is allocated, FALSE if "const"
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37 BOOL allocated; ///< TRUE if this structure has been allocated
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38
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39 void *data; ///< Internal data
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40 time_t atime; ///< Last access time
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41 int64_t size; ///< Size in bytes
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42 int status; ///< Status
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43 size_t line; ///< Line number
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44
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45 // Mem data
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46 size_t maxSize; ///< Maximum size (0 = no limit)
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47 size_t memSize; ///< Size of data
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48 size_t memAlloc; ///< Amount allocated
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49 size_t minAlloc; ///< Minimum allocation increase (0 = default)
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50 off_t memOffset; ///< Current offset in data
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51 uint8_t *memData; ///< Pointer to data
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52 BOOL memFree; ///< TRUE = free the allocated memory on thfclose(), FALSE = no
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53 BOOL memWrite; ///< TRUE = memory can be written to / expanded etc. FALSE = no
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55 // Message functions
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56 void (*error)(struct th_ioctx *ctx, const int err, const char *msg);
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57 void (*msg)(struct th_ioctx *ctx, const int level, const char *msg);
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59 const struct th_ioctx_ops *fops; ///< Pointer to I/O ops struct to be used with this context
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60 } th_ioctx;
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63 typedef struct th_ioctx_ops
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64 {
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65 char *name; ///< Name of this I/O ops definition
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67 int (*fopen)(th_ioctx *ctx);
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68 void (*fclose)(th_ioctx *ctx);
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70 int (*freset)(th_ioctx *ctx);
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71 int (*ferror)(th_ioctx *ctx);
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72 int (*fseek)(th_ioctx *ctx, const off_t, const int whence);
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73 off_t (*fsize)(th_ioctx *ctx);
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74 off_t (*ftell)(th_ioctx *ctx);
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75 BOOL (*feof)(th_ioctx *ctx);
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76 int (*fgetc)(th_ioctx *ctx);
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77 int (*fputc)(int, th_ioctx *ctx);
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78 size_t (*fread)(void *ptr, const size_t, const size_t, th_ioctx *ctx);
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79 size_t (*fwrite)(const void *ptr, const size_t, const size_t, th_ioctx *ctx);
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81 char * (*fgets)(char *str, int size, th_ioctx *ctx);
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82 int (*fputs)(const char *str, th_ioctx *ctx);
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83 int (*vfprintf)(th_ioctx *ctx, const char *fmt, va_list ap);
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84
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85 } th_ioctx_ops;
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88 //
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89 // Some basic iops
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90 //
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91 extern const th_ioctx_ops th_stdio_io_ops, th_mem_io_ops;
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95 //
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96 // I/O context management functions
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97 //
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98 th_ioctx * th_io_new(const th_ioctx_ops *fops, const char *filename);
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99 int th_io_open(th_ioctx *ctx, const char *mode);
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100 int th_io_fopen(th_ioctx **pctx, const th_ioctx_ops *fops, const char *filename, const char *mode);
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101 int th_io_reopen(th_ioctx *ctx, const char *mode);
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102 void th_io_close(th_ioctx *ctx);
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104 void th_io_init_stdio(th_ioctx *ctx, FILE *fh);
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105
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106 BOOL th_io_set_handlers(th_ioctx *ctx,
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107 void (*error)(th_ioctx *, const int, const char *msg),
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108 void (*msg)(th_ioctx *, const int, const char *msg));
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109
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110 int th_io_error_v(th_ioctx *ctx, const int err, const char *fmt, va_list ap);
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111 void th_io_msg_v(th_ioctx *ctx, const int level, const char *fmt, va_list ap);
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112 int th_io_error(th_ioctx *ctx, const int err, const char *fmt, ...)
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113 TH_ATTR_PRINTF_FMT(3, 4);
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114 void th_io_msg(th_ioctx *ctx, const int level, const char *fmt, ...)
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115 TH_ATTR_PRINTF_FMT(3, 4);
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116
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118 //
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119 // Basic I/O operations
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120 //
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121 int thfopen(th_ioctx *ctx);
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122 void thfclose(th_ioctx *ctx);
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123
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124 int thfreset(th_ioctx *ctx);
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125 int thferror(th_ioctx *ctx);
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126 int thfseek(th_ioctx *ctx, const off_t, const int whence);
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127 off_t thfsize(th_ioctx *ctx);
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128 off_t thftell(th_ioctx *ctx);
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129 BOOL thfeof(th_ioctx *ctx);
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130 int thfgetc(th_ioctx *ctx);
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131 int thfputc(int ch, th_ioctx *ctx);
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132 size_t thfread(void *ptr, const size_t, const size_t, th_ioctx *ctx);
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133 size_t thfwrite(const void *, const size_t, const size_t, th_ioctx *ctx);
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134 char * thfgets(char *ptr, int size, th_ioctx *ctx);
208
3635415a2d03 More work on th_ioctx stuff and wrappers.
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135 int thfputs(const char *ptr, th_ioctx *ctx);
202
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136 int thvfprintf(th_ioctx *ctx, const char *fmt, va_list ap);
570
262411458cde Add __attribute__(__format__ ..) specifiers for functions that use printf() style format specifiers.
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137 int thfprintf(th_ioctx *ctx, const char *fmt, ...)
577
70d44ba005ac Define a helper macro for __attribute__ ((__format__ (__printf__, 2, 3)))
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138 TH_ATTR_PRINTF_FMT(2, 3);
72
43df05a632cb Break I/O context API, add function pointers to init/open/new functions.
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139
677
927772fb0745 Oops, fix the return type of thfread_str() and thfwrite_str().
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140 BOOL thfread_str(th_ioctx *ctx, void *ptr, const size_t len);
457
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141 BOOL thfread_u8(th_ioctx *ctx, uint8_t *);
677
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142 BOOL thfwrite_str(th_ioctx *ctx, const void *ptr, const size_t len);
457
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143 BOOL thfwrite_u8(th_ioctx *ctx, const uint8_t);
202
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144
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145
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146 //
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147 // Endian-handling file read/write routines
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148 //
457
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149 BOOL thfwrite_ne16(th_ioctx *ctx, const uint16_t v);
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150 BOOL thfwrite_ne32(th_ioctx *ctx, const uint32_t v);
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151 BOOL thfwrite_ne64(th_ioctx *ctx, const uint64_t v);
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152 BOOL thfread_ne16(th_ioctx *ctx, uint16_t *v);
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153 BOOL thfread_ne32(th_ioctx *ctx, uint32_t *v);
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154 BOOL thfread_ne64(th_ioctx *ctx, uint64_t *v);
202
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155
457
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156 BOOL thfwrite_le16(th_ioctx *ctx, const uint16_t v);
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157 BOOL thfwrite_le32(th_ioctx *ctx, const uint32_t v);
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158 BOOL thfwrite_le64(th_ioctx *ctx, const uint64_t v);
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159 BOOL thfread_le16(th_ioctx *ctx, uint16_t *v);
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160 BOOL thfread_le32(th_ioctx *ctx, uint32_t *v);
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161 BOOL thfread_le64(th_ioctx *ctx, uint64_t *v);
202
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162
457
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163 BOOL thfwrite_be16(th_ioctx *ctx, const uint16_t v);
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164 BOOL thfwrite_be32(th_ioctx *ctx, const uint32_t v);
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165 BOOL thfwrite_be64(th_ioctx *ctx, const uint64_t v);
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166 BOOL thfread_be16(th_ioctx *ctx, uint16_t *v);
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167 BOOL thfread_be32(th_ioctx *ctx, uint32_t *v);
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168 BOOL thfread_be64(th_ioctx *ctx, uint64_t *v);
67
d94af48cef7b Added new module, a simple I/O context helper.
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parents:
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169
d94af48cef7b Added new module, a simple I/O context helper.
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170
d94af48cef7b Added new module, a simple I/O context helper.
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171 #ifdef __cplusplus
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172 }
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173 #endif
129
aa2d608fb3f3 Cosmetics.
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174 #endif // TH_IOCTX_H