Mercurial > hg > dmlib
annotate src/dmpack.c @ 1033:c353e6bcb733
Change handling of filename field in PACKs.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Sun, 01 Mar 2015 16:39:46 +0200 |
| parents | a76056297006 |
| children | d674ddc0fc82 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * DMLib | |
| 3 * -- PACK-file handling | |
| 4 * Programmed and designed by Matti 'ccr' Hamalainen | |
| 1013 | 5 * (C) Copyright 2011-2015 Tecnic Software productions (TNSP) |
| 0 | 6 */ |
| 7 #include "dmpack.h" | |
| 8 #include "dmfile.h" | |
| 9 | |
| 10 | |
|
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changeset
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11 DMPackEntry *dmPackEntryNew() |
| 0 | 12 { |
| 13 return (DMPackEntry *) dmMalloc0(sizeof(DMPackEntry)); | |
| 14 } | |
| 15 | |
| 16 | |
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17 void dmPackEntryFree(DMPackEntry * node) |
| 0 | 18 { |
| 19 dmFree(node); | |
| 20 } | |
| 21 | |
| 22 | |
|
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Rename many pack & resource handling functions.
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parents:
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diff
changeset
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23 void dmPackEntryInsert(DMPackEntry ** packDir, DMPackEntry * node) |
| 0 | 24 { |
| 25 if (*packDir != NULL) | |
| 26 { | |
| 27 node->prev = (*packDir)->prev; | |
| 28 (*packDir)->prev->next = node; | |
| 29 (*packDir)->prev = node; | |
| 30 } | |
| 31 else | |
| 32 { | |
| 33 *packDir = node->prev = node; | |
| 34 } | |
| 35 | |
| 36 node->next = NULL; | |
| 37 } | |
| 38 | |
| 39 | |
|
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Rename many pack & resource handling functions.
Matti Hamalainen <ccr@tnsp.org>
parents:
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diff
changeset
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40 void dmPackEntryDelete(DMPackEntry ** packDir, DMPackEntry * node) |
| 0 | 41 { |
| 42 if (node->prev) | |
| 43 node->prev->next = node->next; | |
| 44 | |
| 45 if (node->next) | |
| 46 node->next->prev = node->prev; | |
| 47 else | |
| 48 (*packDir)->prev = node->prev; | |
| 49 | |
| 50 node->prev = node->next = NULL; | |
| 51 } | |
| 52 | |
| 53 | |
|
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Rename many pack & resource handling functions.
Matti Hamalainen <ccr@tnsp.org>
parents:
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diff
changeset
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54 DMPackEntry *dmPackFind(DMPackEntry *list, const char *filename) |
| 0 | 55 { |
| 56 DMPackEntry *node; | |
| 57 | |
| 58 for (node = list; node != NULL; node = node->next) | |
| 59 { | |
| 60 if (strcmp(node->filename, filename) == 0) | |
| 61 return node; | |
| 62 } | |
| 63 | |
| 64 return NULL; | |
| 65 } | |
| 66 | |
| 67 | |
| 68 /* | |
| 69 * OPEN a packfile | |
| 70 */ | |
|
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71 int dmPackOpen(const char *filename, DMPackFile ** ppPack, BOOL readOnly) |
| 0 | 72 { |
| 73 unsigned int i; | |
|
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74 DMPackFile *pack = NULL; |
| 0 | 75 DMPackFileHeader hdr; |
|
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parents:
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76 int ret = DMERR_OK; |
| 0 | 77 |
| 78 // Allocate packfile-structure | |
|
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79 if ((pack = dmMalloc0(sizeof(DMPackFile))) == NULL) |
|
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parents:
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80 { |
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81 ret = DMERR_MALLOC; |
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82 goto out; |
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Cleanups and improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
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83 } |
| 0 | 84 |
| 85 // Open the file | |
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parents:
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86 if ((pack->file = fopen(filename, readOnly ? "rb" : "r+b")) == NULL) |
| 0 | 87 { |
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parents:
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diff
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88 ret = DMERR_FOPEN; |
|
7666ba24e0c6
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Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
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89 goto out; |
| 0 | 90 } |
| 91 | |
| 92 pack->filename = dm_strdup(filename); | |
| 93 | |
| 94 // Read PACK header | |
| 95 fseek(pack->file, 0L, SEEK_SET); | |
| 96 if (!dm_fread_str(pack->file, (Uint8 *) &hdr.ident, sizeof(hdr.ident)) || | |
| 97 !dm_fread_le16(pack->file, &hdr.version) || | |
| 98 !dm_fread_le32(pack->file, &hdr.dirEntries) || | |
| 99 !dm_fread_le32(pack->file, &hdr.dirOffset)) | |
| 100 { | |
| 1030 | 101 ret = DMERR_FREAD; |
| 102 goto out; | |
| 0 | 103 } |
| 104 | |
| 105 // Check information | |
| 106 if (memcmp(&hdr.ident, DPACK_IDENT, sizeof(hdr.ident)) != 0) | |
| 107 { | |
|
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parents:
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108 ret = DMERR_NOTPACK; |
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parents:
812
diff
changeset
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109 goto out; |
| 0 | 110 } |
| 111 | |
| 112 if (hdr.version != DPACK_VERSION) | |
| 113 { | |
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parents:
812
diff
changeset
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114 ret = DMERR_VERSION; |
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7666ba24e0c6
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Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
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115 goto out; |
| 0 | 116 } |
| 117 | |
| 118 // Read directory | |
|
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parents:
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diff
changeset
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119 if (hdr.dirOffset < sizeof(hdr) || |
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7666ba24e0c6
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Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
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120 fseek(pack->file, hdr.dirOffset, SEEK_SET) != 0) |
| 0 | 121 { |
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7666ba24e0c6
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Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
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122 ret = DMERR_INVALID; |
|
7666ba24e0c6
Cleanups and improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
|
123 goto out; |
| 0 | 124 } |
| 125 | |
| 126 for (i = 0; i < hdr.dirEntries; i++) | |
| 127 { | |
| 128 // Allocate and read directory entry | |
|
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parents:
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diff
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129 DMPackEntry *entry; |
| 0 | 130 |
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1012
7666ba24e0c6
Cleanups and improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
|
131 if ((entry = dmPackEntryNew()) == NULL) |
| 0 | 132 { |
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1012
7666ba24e0c6
Cleanups and improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
|
133 ret = DMERR_MALLOC; |
|
7666ba24e0c6
Cleanups and improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
|
134 goto out; |
| 0 | 135 } |
| 136 | |
|
1033
c353e6bcb733
Change handling of filename field in PACKs.
Matti Hamalainen <ccr@tnsp.org>
parents:
1030
diff
changeset
|
137 if (!dm_fread_str(pack->file, (Uint8 *) &entry->filename, DMRES_NAME_LEN) || |
| 0 | 138 !dm_fread_le32(pack->file, &entry->size) || |
| 139 !dm_fread_le32(pack->file, &entry->offset) || | |
| 140 !dm_fread_le32(pack->file, &entry->length) || | |
|
721
bb14d7907eb2
Rename many pack & resource handling functions.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
141 !dm_fread_le32(pack->file, &entry->flags)) |
| 0 | 142 { |
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1012
7666ba24e0c6
Cleanups and improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
|
143 ret = DMERR_FREAD; |
|
7666ba24e0c6
Cleanups and improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
|
144 goto out; |
| 0 | 145 } |
| 146 | |
|
1033
c353e6bcb733
Change handling of filename field in PACKs.
Matti Hamalainen <ccr@tnsp.org>
parents:
1030
diff
changeset
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147 // Ensure that the filename ends in NUL |
|
c353e6bcb733
Change handling of filename field in PACKs.
Matti Hamalainen <ccr@tnsp.org>
parents:
1030
diff
changeset
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148 entry->filename[DMRES_NAME_LEN] = 0; |
|
c353e6bcb733
Change handling of filename field in PACKs.
Matti Hamalainen <ccr@tnsp.org>
parents:
1030
diff
changeset
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149 |
|
1012
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Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
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150 // Validate |
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7666ba24e0c6
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parents:
812
diff
changeset
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151 if (entry->size == 0 || entry->length == 0 || |
|
7666ba24e0c6
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Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
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152 entry->length > hdr.dirOffset || |
|
1033
c353e6bcb733
Change handling of filename field in PACKs.
Matti Hamalainen <ccr@tnsp.org>
parents:
1030
diff
changeset
|
153 entry->offset > hdr.dirOffset || |
|
c353e6bcb733
Change handling of filename field in PACKs.
Matti Hamalainen <ccr@tnsp.org>
parents:
1030
diff
changeset
|
154 strlen(entry->filename) == 0) |
| 1030 | 155 { |
| 156 ret = DMERR_INVALID; | |
| 157 goto out; | |
| 158 } | |
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parents:
812
diff
changeset
|
159 |
| 0 | 160 // Insert into list |
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721
bb14d7907eb2
Rename many pack & resource handling functions.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
161 dmPackEntryInsert(&pack->entries, entry); |
| 0 | 162 } |
| 163 | |
|
1012
7666ba24e0c6
Cleanups and improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
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164 out: |
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7666ba24e0c6
Cleanups and improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
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165 if (ret != DMERR_OK) |
|
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Cleanups and improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
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166 { |
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Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
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167 dmPackClose(pack); |
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Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
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168 pack = NULL; |
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Cleanups and improve error handling.
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parents:
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diff
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169 } |
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parents:
812
diff
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170 |
| 0 | 171 *ppPack = pack; |
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Cleanups and improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
|
172 |
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7666ba24e0c6
Cleanups and improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
|
173 return ret; |
| 0 | 174 } |
| 175 | |
| 176 | |
| 177 /* | |
| 178 * CLOSE the packfile | |
| 179 */ | |
|
721
bb14d7907eb2
Rename many pack & resource handling functions.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
180 int dmPackClose(DMPackFile * pack) |
| 0 | 181 { |
|
721
bb14d7907eb2
Rename many pack & resource handling functions.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
182 DMPackEntry *node; |
| 0 | 183 |
| 184 if (pack == NULL) | |
| 185 return DMERR_OK; | |
| 186 | |
| 187 // Write the directory | |
| 188 node = pack->entries; | |
| 189 while (node != NULL) | |
| 190 { | |
|
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bb14d7907eb2
Rename many pack & resource handling functions.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
191 DMPackEntry *next = node->next; |
|
bb14d7907eb2
Rename many pack & resource handling functions.
Matti Hamalainen <ccr@tnsp.org>
parents:
0
diff
changeset
|
192 dmPackEntryFree(node); |
| 0 | 193 node = next; |
| 194 } | |
| 195 | |
| 196 // Close the file | |
| 197 if (pack->file != NULL) | |
| 198 fclose(pack->file); | |
| 199 | |
| 200 // Free structures | |
| 201 dmFree(pack->filename); | |
| 202 | |
| 203 // Free packfile | |
|
1012
7666ba24e0c6
Cleanups and improve error handling.
Matti Hamalainen <ccr@tnsp.org>
parents:
812
diff
changeset
|
204 memset(pack, 0, sizeof(DMPackFile)); |
| 0 | 205 dmFree(pack); |
| 206 | |
| 207 return DMERR_OK; | |
| 208 } |