nkeynes@1034 | 1 | /**
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nkeynes@1034 | 2 | * $Id: vmuvol.h 869 2008-09-08 07:56:33Z nkeynes $
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nkeynes@1034 | 3 | *
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nkeynes@1034 | 4 | * VMU volume (ie block device) support
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nkeynes@1034 | 5 | *
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nkeynes@1034 | 6 | * Copyright (c) 2009 Nathan Keynes.
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nkeynes@1034 | 7 | *
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nkeynes@1034 | 8 | * This program is free software; you can redistribute it and/or modify
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nkeynes@1034 | 9 | * it under the terms of the GNU General Public License as published by
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nkeynes@1034 | 10 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@1034 | 11 | * (at your option) any later version.
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nkeynes@1034 | 12 | *
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nkeynes@1034 | 13 | * This program is distributed in the hope that it will be useful,
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nkeynes@1034 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@1034 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@1034 | 16 | * GNU General Public License for more details.
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nkeynes@1034 | 17 | */
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nkeynes@1034 | 18 |
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nkeynes@1034 | 19 | #include <glib/gmem.h>
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nkeynes@1034 | 20 | #include <glib/gstrfuncs.h>
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nkeynes@1034 | 21 | #include <string.h>
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nkeynes@1034 | 22 | #include <stdio.h>
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nkeynes@1034 | 23 | #include <fcntl.h>
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nkeynes@1034 | 24 | #include <errno.h>
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nkeynes@1034 | 25 |
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nkeynes@1034 | 26 | #include "vmu/vmuvol.h"
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nkeynes@1034 | 27 | #include "dream.h"
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nkeynes@1034 | 28 |
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nkeynes@1034 | 29 | #define VMU_MAX_PARTITIONS 256
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nkeynes@1034 | 30 | #define VMU_MAX_BLOCKS 65536 /* Actually slightly less than this, but it'll do */
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nkeynes@1034 | 31 |
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nkeynes@1034 | 32 | typedef struct vmu_partition {
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nkeynes@1034 | 33 | struct vmu_volume_metadata metadata;
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nkeynes@1034 | 34 | uint32_t block_count;
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nkeynes@1034 | 35 | char *blocks;
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nkeynes@1034 | 36 | } *vmu_partition_t;
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nkeynes@1034 | 37 |
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nkeynes@1034 | 38 | struct vmu_volume {
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nkeynes@1034 | 39 | const gchar *display_name;
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nkeynes@1034 | 40 | vmu_partnum_t part_count;
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nkeynes@1034 | 41 | gboolean dirty;
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nkeynes@1034 | 42 | struct vmu_partition part[0];
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nkeynes@1034 | 43 | };
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nkeynes@1034 | 44 |
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nkeynes@1034 | 45 | /* On-VMU structures, courtesy of Marcus Comstedt */
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nkeynes@1034 | 46 | struct vmu_superblock {
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nkeynes@1034 | 47 | char magic[16];
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nkeynes@1034 | 48 | uint8_t colour_flag;
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nkeynes@1034 | 49 | uint8_t bgra[4];
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nkeynes@1034 | 50 | uint8_t pad1[27];
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nkeynes@1034 | 51 | char timestamp[8];
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nkeynes@1034 | 52 | char pad2[8];
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nkeynes@1034 | 53 | char unknown[6];
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nkeynes@1034 | 54 | uint16_t fat_block;
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nkeynes@1034 | 55 | uint16_t fat_size;
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nkeynes@1034 | 56 | uint16_t dir_block;
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nkeynes@1034 | 57 | uint16_t dir_size;
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nkeynes@1034 | 58 | uint16_t icon_shape;
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nkeynes@1034 | 59 | uint16_t user_size;
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nkeynes@1034 | 60 | /* remainder unknown */
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nkeynes@1034 | 61 | };
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nkeynes@1034 | 62 |
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nkeynes@1034 | 63 | struct vmu_direntry {
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nkeynes@1034 | 64 | uint8_t filetype;
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nkeynes@1034 | 65 | uint8_t copy_flag;
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nkeynes@1034 | 66 | uint16_t blkno;
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nkeynes@1034 | 67 | char filename[12];
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nkeynes@1034 | 68 | char timestamp[8];
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nkeynes@1034 | 69 | uint16_t blksize; /* Size in blocks*/
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nkeynes@1034 | 70 | uint16_t hdroff; /* Header offset in blocks */
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nkeynes@1034 | 71 | char pad[4];
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nkeynes@1034 | 72 | };
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nkeynes@1034 | 73 |
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nkeynes@1034 | 74 | #define MD(vmu,ptno) ((vmu)->part[ptno].metadata)
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nkeynes@1034 | 75 |
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nkeynes@1034 | 76 | #define VMU_BLOCK(vmu,ptno,blkno) (&(vmu)->part[ptno].blocks[(blkno)*VMU_BLOCK_SIZE])
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nkeynes@1034 | 77 |
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nkeynes@1034 | 78 | #define VMU_FAT_ENTRY(vmu,pt,ent) ((uint16_t *)VMU_BLOCK(vmu, pt, (MD(vmu,pt).fat_block - ((ent)>>8))))[(ent)&0xFF]
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nkeynes@1034 | 79 |
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nkeynes@1034 | 80 | #define FAT_EMPTY 0xFFFC
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nkeynes@1034 | 81 | #define FAT_EOF 0xFFFA
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nkeynes@1034 | 82 |
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nkeynes@1034 | 83 | static const struct vmu_volume_metadata default_metadata = { 255, 255, 254, 1, 253, 13, 0, 200, 31, 0, 128 };
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nkeynes@1034 | 84 |
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nkeynes@1034 | 85 | vmu_volume_t vmu_volume_new_default( const gchar *display_name )
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nkeynes@1034 | 86 | {
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nkeynes@1034 | 87 | vmu_volume_t vol = g_malloc0( sizeof(struct vmu_volume) + sizeof(struct vmu_partition) );
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nkeynes@1034 | 88 | vol->part_count = 1;
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nkeynes@1034 | 89 | vol->dirty = FALSE;
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nkeynes@1034 | 90 | memcpy( &vol->part[0].metadata, &default_metadata, sizeof(struct vmu_volume_metadata) );
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nkeynes@1034 | 91 | vol->part[0].block_count = VMU_DEFAULT_VOL_BLOCKS;
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nkeynes@1034 | 92 | vol->part[0].blocks = g_malloc0( VMU_DEFAULT_VOL_BLOCKS * VMU_BLOCK_SIZE );
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nkeynes@1034 | 93 | vol->display_name = display_name == NULL ? NULL : g_strdup(display_name);
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nkeynes@1034 | 94 | vmu_volume_format( vol, 0, TRUE );
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nkeynes@1034 | 95 | return vol;
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nkeynes@1034 | 96 | }
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nkeynes@1034 | 97 |
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nkeynes@1034 | 98 | void vmu_volume_destroy( vmu_volume_t vol )
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nkeynes@1034 | 99 | {
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nkeynes@1034 | 100 | int i;
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nkeynes@1034 | 101 | if( vol == NULL )
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nkeynes@1034 | 102 | return;
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nkeynes@1034 | 103 |
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nkeynes@1034 | 104 | for( i=0; i<vol->part_count; i++ ) {
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nkeynes@1034 | 105 | g_free( vol->part[i].blocks );
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nkeynes@1034 | 106 | vol->part[i].blocks = NULL;
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nkeynes@1034 | 107 | }
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nkeynes@1034 | 108 | if( vol->display_name ) {
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nkeynes@1034 | 109 | g_free( (char *)vol->display_name );
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nkeynes@1034 | 110 | vol->display_name = NULL;
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nkeynes@1034 | 111 | }
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nkeynes@1034 | 112 | g_free(vol);
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nkeynes@1034 | 113 | }
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nkeynes@1034 | 114 |
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nkeynes@1034 | 115 | void vmu_volume_format( vmu_volume_t vol, vmu_partnum_t pt, gboolean quick )
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nkeynes@1034 | 116 | {
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nkeynes@1034 | 117 | if( pt >= vol->part_count ) {
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nkeynes@1034 | 118 | return;
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nkeynes@1034 | 119 | }
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nkeynes@1034 | 120 |
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nkeynes@1034 | 121 | if( !quick ) {
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nkeynes@1034 | 122 | /* Wipe it completely first */
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nkeynes@1034 | 123 | memset( vol->part[pt].blocks, 0, (vol->part[pt].block_count) * VMU_BLOCK_SIZE );
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nkeynes@1034 | 124 | }
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nkeynes@1034 | 125 |
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nkeynes@1034 | 126 | struct vmu_volume_metadata *meta = &vol->part[pt].metadata;
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nkeynes@1034 | 127 | unsigned int fatblkno = meta->fat_block;
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nkeynes@1034 | 128 | unsigned int dirblkno = meta->dir_block;
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nkeynes@1034 | 129 |
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nkeynes@1034 | 130 | /* Write superblock */
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nkeynes@1034 | 131 | struct vmu_superblock *super = (struct vmu_superblock *)VMU_BLOCK(vol,pt, meta->super_block);
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nkeynes@1034 | 132 | memset( super->magic, 0x55, 16 );
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nkeynes@1034 | 133 | memset( &super->colour_flag, 0, 240 ); /* Blank the rest for now */
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nkeynes@1034 | 134 | super->fat_block = meta->fat_block;
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nkeynes@1034 | 135 | super->fat_size = meta->fat_size;
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nkeynes@1034 | 136 | super->dir_block = meta->dir_block;
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nkeynes@1034 | 137 | super->user_size = meta->user_size;
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nkeynes@1034 | 138 |
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nkeynes@1034 | 139 | /* Write file allocation tables */
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nkeynes@1034 | 140 | int i,j;
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nkeynes@1034 | 141 | for( j=0; j<meta->fat_size; j++ ) {
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nkeynes@1034 | 142 | uint16_t *fat = (uint16_t *)VMU_BLOCK(vol,pt,fatblkno-j);
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nkeynes@1034 | 143 | for( i=0; i<256; i++ ) {
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nkeynes@1034 | 144 | fat[i] = FAT_EMPTY;
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nkeynes@1034 | 145 | }
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nkeynes@1034 | 146 | }
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nkeynes@1034 | 147 |
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nkeynes@1034 | 148 | /* Fill in the system allocations in the FAT */
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nkeynes@1034 | 149 | for( i=0; i<meta->fat_size-1; i++ ) {
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nkeynes@1034 | 150 | VMU_FAT_ENTRY(vol,pt,fatblkno-i) = fatblkno-i-1;
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nkeynes@1034 | 151 | }
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nkeynes@1034 | 152 | VMU_FAT_ENTRY(vol,pt,fatblkno - i) = FAT_EOF;
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nkeynes@1034 | 153 | for( i=0; i<meta->dir_size-1; i++ ) {
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nkeynes@1034 | 154 | VMU_FAT_ENTRY(vol,pt,dirblkno-i) = dirblkno-i-1;
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nkeynes@1034 | 155 | }
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nkeynes@1034 | 156 | VMU_FAT_ENTRY(vol,pt,dirblkno-i) = FAT_EOF;
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nkeynes@1034 | 157 |
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nkeynes@1034 | 158 | /* If quick-format, blank the directory. Otherwise it's already been done */
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nkeynes@1034 | 159 | if( quick ) {
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nkeynes@1034 | 160 | memset( VMU_BLOCK(vol,pt,dirblkno-meta->dir_size+1),
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nkeynes@1034 | 161 | 0, meta->dir_size * VMU_BLOCK_SIZE );
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nkeynes@1034 | 162 | }
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nkeynes@1034 | 163 | }
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nkeynes@1034 | 164 |
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nkeynes@1034 | 165 | /*************************** File load/save ********************************/
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nkeynes@1034 | 166 |
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nkeynes@1034 | 167 | /**
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nkeynes@1034 | 168 | * Current file has 1 META chunk for all volume metadata, followed by a
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nkeynes@1034 | 169 | * DATA chunk for each partition's block data. The META chunk is required to
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nkeynes@1034 | 170 | * occur before any DATA blocks.
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nkeynes@1034 | 171 | * Unknown chunks are skipped to allow for forwards compatibility if/when
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nkeynes@1034 | 172 | * we add the VMU runtime side of things
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nkeynes@1034 | 173 | */
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nkeynes@1034 | 174 |
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nkeynes@1034 | 175 | struct vmu_file_header {
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nkeynes@1034 | 176 | char magic[16];
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nkeynes@1034 | 177 | uint32_t version;
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nkeynes@1034 | 178 | uint32_t head_len;
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nkeynes@1034 | 179 | uint32_t part_count;
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nkeynes@1034 | 180 | uint32_t display_name_len;
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nkeynes@1034 | 181 | char display_name[0];
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nkeynes@1034 | 182 | };
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nkeynes@1034 | 183 |
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nkeynes@1034 | 184 | struct vmu_chunk_header {
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nkeynes@1034 | 185 | char name[4];
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nkeynes@1034 | 186 | uint32_t length;
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nkeynes@1034 | 187 | };
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nkeynes@1034 | 188 |
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nkeynes@1034 | 189 |
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nkeynes@1034 | 190 |
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nkeynes@1034 | 191 | gboolean vmu_volume_save( const gchar *filename, vmu_volume_t vol, gboolean create_only )
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nkeynes@1034 | 192 | {
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nkeynes@1034 | 193 | struct vmu_file_header head;
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nkeynes@1034 | 194 | struct vmu_chunk_header chunk;
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nkeynes@1034 | 195 | int i;
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nkeynes@1034 | 196 |
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nkeynes@1034 | 197 | FILE *f = fopen( filename, (create_only ? "wx" : "w") ); /* Portable? */
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nkeynes@1034 | 198 | if( f == NULL ) {
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nkeynes@1034 | 199 | return FALSE;
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nkeynes@1034 | 200 | }
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nkeynes@1034 | 201 |
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nkeynes@1034 | 202 | /* File header */
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nkeynes@1034 | 203 | memcpy( head.magic, VMU_FILE_MAGIC, 16 );
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nkeynes@1034 | 204 | head.version = VMU_FILE_VERSION;
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nkeynes@1034 | 205 | head.part_count = vol->part_count;
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nkeynes@1034 | 206 | head.display_name_len = vol->display_name == NULL ? 0 : (strlen(vol->display_name)+1);
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nkeynes@1034 | 207 | head.head_len = sizeof(head) + head.display_name_len;
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nkeynes@1034 | 208 | fwrite( &head, sizeof(head), 1, f );
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nkeynes@1034 | 209 | if( vol->display_name != NULL ) {
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nkeynes@1034 | 210 | fwrite( vol->display_name, head.display_name_len, 1, f );
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nkeynes@1034 | 211 | }
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nkeynes@1034 | 212 |
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nkeynes@1034 | 213 | /* METAdata chunk */
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nkeynes@1034 | 214 | memcpy( chunk.name, "META", 4 );
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nkeynes@1034 | 215 | chunk.length = sizeof(struct vmu_volume_metadata) * vol->part_count;
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nkeynes@1034 | 216 | fwrite( &chunk, sizeof(chunk), 1, f );
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nkeynes@1034 | 217 | for( i=0; i < vol->part_count; i++ ) {
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nkeynes@1034 | 218 | fwrite( &vol->part[i].metadata, sizeof(struct vmu_volume_metadata), 1, f );
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nkeynes@1034 | 219 | }
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nkeynes@1034 | 220 |
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nkeynes@1034 | 221 | /* partition DATA chunks */
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nkeynes@1034 | 222 | for( i=0; i< vol->part_count; i++ ) {
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nkeynes@1034 | 223 | memcpy( chunk.name, "DATA", 4 );
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nkeynes@1034 | 224 | chunk.length = 0;
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nkeynes@1034 | 225 | fwrite( &chunk, sizeof(chunk), 1, f );
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nkeynes@1034 | 226 | long posn = ftell(f);
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nkeynes@1034 | 227 | fwrite( &vol->part[i].block_count, sizeof(vol->part[i].block_count), 1, f );
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nkeynes@1034 | 228 | fwrite_gzip( vol->part[i].blocks, vol->part[i].block_count, VMU_BLOCK_SIZE, f );
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nkeynes@1034 | 229 | long end = ftell(f);
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nkeynes@1034 | 230 | fseek( f, posn - sizeof(chunk.length), SEEK_SET );
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nkeynes@1034 | 231 | chunk.length = end-posn;
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nkeynes@1034 | 232 | fwrite( &chunk.length, sizeof(chunk.length), 1, f );
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nkeynes@1034 | 233 | fseek( f, end, SEEK_SET );
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nkeynes@1034 | 234 | }
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nkeynes@1034 | 235 | fclose(f);
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nkeynes@1034 | 236 | vol->dirty = FALSE;
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nkeynes@1034 | 237 | return TRUE;
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nkeynes@1034 | 238 | }
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nkeynes@1034 | 239 |
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nkeynes@1034 | 240 | vmu_volume_t vmu_volume_load( const gchar *filename )
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nkeynes@1034 | 241 | {
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nkeynes@1034 | 242 | struct vmu_file_header head;
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nkeynes@1034 | 243 | struct vmu_chunk_header chunk;
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nkeynes@1034 | 244 | vmu_volume_t vol;
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nkeynes@1034 | 245 | int i;
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nkeynes@1034 | 246 |
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nkeynes@1034 | 247 | FILE *f = fopen( filename, "ro" );
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nkeynes@1034 | 248 | if( f == NULL ) {
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nkeynes@1034 | 249 | ERROR( "Unable to open VMU file '%s': %s", filename, strerror(errno) );
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nkeynes@1034 | 250 | return FALSE;
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nkeynes@1034 | 251 | }
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nkeynes@1034 | 252 |
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nkeynes@1034 | 253 | if( fread( &head, sizeof(head), 1, f ) != 1 ||
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nkeynes@1034 | 254 | memcmp(head.magic, VMU_FILE_MAGIC, 16) != 0 ||
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nkeynes@1034 | 255 | head.part_count > VMU_MAX_PARTITIONS ||
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nkeynes@1034 | 256 | head.head_len < (sizeof(head) + head.display_name_len) ) {
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nkeynes@1034 | 257 | fclose(f);
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nkeynes@1034 | 258 | ERROR( "Unable to load VMU '%s': bad file header", filename );
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nkeynes@1034 | 259 | return NULL;
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nkeynes@1034 | 260 | }
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nkeynes@1034 | 261 |
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nkeynes@1034 | 262 | vol = (vmu_volume_t)g_malloc0( sizeof(struct vmu_volume) + sizeof(struct vmu_partition)*head.part_count );
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nkeynes@1034 | 263 | vol->part_count = head.part_count;
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nkeynes@1034 | 264 | vol->dirty = FALSE;
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nkeynes@1034 | 265 | if( head.display_name_len != 0 ) {
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nkeynes@1034 | 266 | vol->display_name = g_malloc( head.display_name_len );
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nkeynes@1034 | 267 | fread( (char *)vol->display_name, head.display_name_len, 1, f );
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nkeynes@1034 | 268 | }
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nkeynes@1034 | 269 | fseek( f, head.head_len, SEEK_SET );
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nkeynes@1034 | 270 |
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nkeynes@1034 | 271 | gboolean have_meta = FALSE;
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nkeynes@1034 | 272 | int next_part = 0;
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nkeynes@1034 | 273 | while( !feof(f) && fread( &chunk, sizeof(chunk), 1, f ) == 1 ) {
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nkeynes@1034 | 274 | if( memcmp( &chunk.name, "META", 4 ) == 0 ) {
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nkeynes@1034 | 275 | if( have_meta || chunk.length != head.part_count * sizeof(struct vmu_volume_metadata) ) {
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nkeynes@1034 | 276 | vmu_volume_destroy(vol);
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nkeynes@1034 | 277 | fclose(f);
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nkeynes@1034 | 278 | ERROR( "Unable to load VMU '%s': bad metadata size (expected %d but was %d)", filename,
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nkeynes@1034 | 279 | head.part_count * sizeof(struct vmu_volume_metadata), chunk.length );
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nkeynes@1034 | 280 | return NULL;
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nkeynes@1034 | 281 | }
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nkeynes@1034 | 282 | for( i=0; i<head.part_count; i++ ) {
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nkeynes@1034 | 283 | fread( &vol->part[i].metadata, sizeof(struct vmu_volume_metadata), 1, f );
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nkeynes@1034 | 284 | }
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nkeynes@1034 | 285 | have_meta = TRUE;
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nkeynes@1034 | 286 | } else if( memcmp( &chunk.name, "DATA", 4 ) == 0 ) {
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nkeynes@1034 | 287 | uint32_t block_count;
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nkeynes@1034 | 288 | fread( &block_count, sizeof(block_count), 1, f );
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nkeynes@1034 | 289 | if( next_part >= vol->part_count || block_count >= VMU_MAX_BLOCKS ) {
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nkeynes@1034 | 290 | // Too many partitions / blocks
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nkeynes@1034 | 291 | vmu_volume_destroy(vol);
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nkeynes@1034 | 292 | fclose(f);
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nkeynes@1034 | 293 | ERROR( "Unable to load VMU '%s': too large (%d/%d)", filename, next_part, block_count );
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nkeynes@1034 | 294 | return NULL;
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nkeynes@1034 | 295 | }
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nkeynes@1034 | 296 | vol->part[next_part].block_count = block_count;
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nkeynes@1034 | 297 | vol->part[next_part].blocks = g_malloc(block_count*VMU_BLOCK_SIZE);
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nkeynes@1034 | 298 | fread_gzip(vol->part[next_part].blocks, VMU_BLOCK_SIZE, block_count, f );
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nkeynes@1034 | 299 | next_part++;
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nkeynes@1034 | 300 | } else {
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nkeynes@1034 | 301 | // else skip unknown block
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nkeynes@1034 | 302 | fseek( f, SEEK_CUR, chunk.length );
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nkeynes@1034 | 303 | WARN( "Unexpected VMU data chunk: '%4.4s'", chunk.name );
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nkeynes@1034 | 304 | }
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nkeynes@1034 | 305 | }
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nkeynes@1034 | 306 |
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nkeynes@1034 | 307 | fclose(f);
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nkeynes@1034 | 308 |
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nkeynes@1034 | 309 | if( !have_meta || next_part != vol->part_count ) {
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nkeynes@1034 | 310 | vmu_volume_destroy( vol );
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nkeynes@1034 | 311 | return NULL;
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nkeynes@1034 | 312 | }
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nkeynes@1034 | 313 |
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nkeynes@1034 | 314 | return vol;
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nkeynes@1034 | 315 | }
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nkeynes@1034 | 316 |
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nkeynes@1034 | 317 | /*************************** Accessing data ********************************/
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nkeynes@1034 | 318 | const char *vmu_volume_get_display_name( vmu_volume_t vol )
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nkeynes@1034 | 319 | {
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nkeynes@1034 | 320 | return vol->display_name;
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nkeynes@1034 | 321 | }
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nkeynes@1034 | 322 |
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nkeynes@1034 | 323 | void vmu_volume_set_display_name( vmu_volume_t vol, const gchar *name )
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nkeynes@1034 | 324 | {
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nkeynes@1034 | 325 | if( vol->display_name != NULL ) {
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nkeynes@1034 | 326 | g_free( (char *)vol->display_name );
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nkeynes@1034 | 327 | }
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nkeynes@1034 | 328 | if( name == NULL ) {
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nkeynes@1034 | 329 | vol->display_name = NULL;
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nkeynes@1034 | 330 | } else {
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nkeynes@1034 | 331 | vol->display_name = g_strdup(name);
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nkeynes@1034 | 332 | }
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nkeynes@1034 | 333 | }
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nkeynes@1034 | 334 |
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nkeynes@1034 | 335 | gboolean vmu_volume_is_dirty( vmu_volume_t vol )
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nkeynes@1034 | 336 | {
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nkeynes@1034 | 337 | return vol->dirty;
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nkeynes@1034 | 338 | }
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nkeynes@1034 | 339 |
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nkeynes@1034 | 340 | gboolean vmu_volume_read_block( vmu_volume_t vol, vmu_partnum_t pt, unsigned int block, unsigned char *out )
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nkeynes@1034 | 341 | {
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nkeynes@1034 | 342 | if( pt >= vol->part_count || block >= vol->part[pt].block_count ) {
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nkeynes@1034 | 343 | return FALSE;
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nkeynes@1034 | 344 | }
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nkeynes@1034 | 345 |
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nkeynes@1034 | 346 | memcpy( out, VMU_BLOCK(vol,pt,block), VMU_BLOCK_SIZE );
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nkeynes@1034 | 347 | return TRUE;
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nkeynes@1034 | 348 | }
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nkeynes@1034 | 349 |
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nkeynes@1034 | 350 | gboolean vmu_volume_write_block( vmu_volume_t vol, vmu_partnum_t pt, unsigned int block, unsigned char *in )
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nkeynes@1034 | 351 | {
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nkeynes@1034 | 352 | if( pt >= vol->part_count || block >= vol->part[pt].block_count ) {
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nkeynes@1034 | 353 | return FALSE;
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nkeynes@1034 | 354 | }
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nkeynes@1034 | 355 | memcpy( VMU_BLOCK(vol,pt,block), in, VMU_BLOCK_SIZE );
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nkeynes@1034 | 356 | vol->dirty = TRUE;
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nkeynes@1034 | 357 | }
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nkeynes@1034 | 358 |
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nkeynes@1034 | 359 | gboolean vmu_volume_write_phase( vmu_volume_t vol, vmu_partnum_t pt, unsigned int block, unsigned int phase, unsigned char *in )
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nkeynes@1034 | 360 | {
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nkeynes@1034 | 361 | if( pt >= vol->part_count || block >= vol->part[pt].block_count || phase >= 4 ) {
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nkeynes@1034 | 362 | return FALSE;
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nkeynes@1034 | 363 | }
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nkeynes@1034 | 364 | memcpy( VMU_BLOCK(vol,pt,block) + (phase*128), in, VMU_BLOCK_SIZE/4 );
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nkeynes@1034 | 365 | vol->dirty = TRUE;
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nkeynes@1034 | 366 | }
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nkeynes@1034 | 367 |
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nkeynes@1034 | 368 | const struct vmu_volume_metadata *vmu_volume_get_metadata( vmu_volume_t vol, vmu_partnum_t partition )
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nkeynes@1034 | 369 | {
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nkeynes@1034 | 370 | if( partition >= vol->part_count ) {
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nkeynes@1034 | 371 | return NULL;
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nkeynes@1034 | 372 | } else {
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nkeynes@1034 | 373 | return &vol->part[partition].metadata;
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nkeynes@1034 | 374 | }
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nkeynes@1034 | 375 | }
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