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1 /*
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2 * DMLib
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3 * -- Resource management
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4 * Programmed and designed by Matti 'ccr' Hamalainen
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5 * (C) Copyright 2011-2012 Tecnic Software productions (TNSP)
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6 */
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7 #ifndef DMRES_H
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8 #define DMRES_H
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9
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10 #include "dmlib.h"
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11
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12 #ifdef DMRES_PACKFS
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13 #include <zlib.h>
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14 #include "dmpack.h"
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15 #endif
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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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20
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21
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22 /* Constants
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23 */
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24 enum
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25 {
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26 DMPRUNE_ATIME = 0x0001,
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27 DMPRUNE_MTIME = 0x0002,
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28 };
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29
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30 enum
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31 {
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32 DRF_USE_PACK = 0x0001,
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33 };
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34
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35 enum
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36 {
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37 DMF_PRELOAD = 0x0001, // Preload this resource
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38 DMF_PERSIST = 0x0002, // Persist loaded resource (only freed at shutdown/explicit prune)
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39 //DMF_STREAM = 0x0004, // This resource is streamed
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40
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41 DMF_LOADED = 0x1000, // Resource has been loaded
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42 };
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43
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44
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45 /* Typedefs and structures
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46 */
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47 struct DMResourceOps;
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48
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49 typedef struct _DMResource
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50 {
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51 // Timestamps (in seconds from time())
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52 int mtime, // When resource was loaded
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53 atime; // Last accessed (dmres_ref()/unref)
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54 int refcount; // Reference count
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55
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56 int flags; // Resource flags (DMF_*)
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57 char *filename;
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58
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59 size_t dataSize; // Size of data
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60 off_t dataOffset; // Current offset in data
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61 Uint8 *data; // Pointer to data
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62
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63 int error; // Error code
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64
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65 struct DMResourceOps *fops; // Pointer to file handling functions struct
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66 struct _DMResource *next, *prev;
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67
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68 FILE * fh;
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69 } DMResource;
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70
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71
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72 typedef struct DMResourceOps
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73 {
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74 int (*ferror)(DMResource *);
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75 int (*fseek)(DMResource *, const off_t, const int);
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76 off_t (*fsize)(DMResource *);
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77 off_t (*ftell)(DMResource *);
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78 BOOL (*feof)(DMResource *);
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79 int (*fgetc)(DMResource *);
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80 size_t (*fread)(void *, const size_t, const size_t, DMResource *);
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81
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82 int (*fopen)(DMResource *);
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83 void (*fclose)(DMResource *);
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84 int (*preload)(DMResource *);
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85 } DMResourceOps;
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86
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87
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88 /* Functions
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89 */
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90 int dmres_init(const char *filename, const char *path, int flags);
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91 void dmres_close(void);
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92
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93 void dmres_prune(int agems, int flags);
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94 int dmres_preload();
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95
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96 int dmres_load_resfile(const char *filename);
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97 int dmres_write_resfile(const char *filename);
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98
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99 DMResource * dmres_find(const char *filename);
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100 int dmres_ref(DMResource *);
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101 int dmres_unref(DMResource *);
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102
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103
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104 // Opening and closing resources
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105 DMResource * dmf_open(const char *);
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106 DMResource * dmf_open_memio(const char *, Uint8 *buf, size_t len);
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107 #ifdef DMRES_STDIO
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108 DMResource * dmf_create_stdio(const char *);
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109 DMResource * dmf_create_stdio_stream(FILE *);
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110 #endif
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111 void dmf_close(DMResource *);
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112
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113
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114 // Basic resource access functions
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115 int dmferror(DMResource *);
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116 int dmfseek(DMResource *, const off_t, const int);
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117 off_t dmfsize(DMResource *);
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118 off_t dmftell(DMResource *);
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119 BOOL dmfeof(DMResource *);
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120 int dmfgetc(DMResource *);
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121 size_t dmfread(void *, const size_t, const size_t, DMResource *);
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122
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123
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124 // Specialized functions for endianess based reading etc
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125 int dmf_read_str(DMResource *, Uint8 *, size_t);
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126 BOOL dmf_read_be16(DMResource *, Uint16 *);
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127 BOOL dmf_read_be32(DMResource *, Uint32 *);
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128 BOOL dmf_read_le16(DMResource *, Uint16 *);
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129 BOOL dmf_read_le32(DMResource *, Uint32 *);
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130
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131 #ifdef DM_HAVE_64BIT
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132 BOOL dmf_read_be64(DMResource *, Uint64 *);
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133 BOOL dmf_read_le64(DMResource *, Uint64 *);
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134 #endif
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135
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136
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137 #ifdef __cplusplus
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138 }
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139 #endif
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140
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141 #endif // DMRES_H
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