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1.1 root 1: /*
2: * readdisk
1.1.1.2 ! root 3: *
1.1 root 4: * Read files from Amiga disk files
5: *
6: * Copyright 1996 Bernd Schmidt
7: */
8:
9: #include "sysconfig.h"
10: #include "sysdeps.h"
11:
1.1.1.2 ! root 12: #include "uae.h"
! 13:
! 14: char warning_buffer[256];
! 15:
! 16: void write_log (const char *s)
! 17: {
! 18: fprintf(stderr, "%s", s);
! 19: }
! 20:
1.1 root 21: unsigned char filemem[901120];
22:
23: typedef struct afile
24: {
25: struct afile *sibling;
26: unsigned char *data;
1.1.1.2 ! root 27: uae_u32 size;
1.1 root 28: char name[32];
29: } afile;
30:
31: typedef struct directory
32: {
33: struct directory *sibling;
34: struct directory *subdirs;
35: struct afile *files;
36: char name[32];
37: } directory;
38:
1.1.1.2 ! root 39: static uae_u32 readlong (unsigned char *buffer, int pos)
1.1 root 40: {
41: return ((*(buffer + pos) << 24) + (*(buffer + pos + 1) << 16)
42: + (*(buffer + pos + 2) << 8) + *(buffer + pos + 3));
43: }
44:
45: static afile *read_file (unsigned char *filebuf)
46: {
1.1.1.2 ! root 47: afile *a = (afile *)xmalloc(sizeof(afile));
1.1 root 48: int sizeleft;
49: unsigned char *datapos;
1.1.1.2 ! root 50: uae_u32 numblocks, blockpos;
! 51:
1.1 root 52: /* BCPL strings... Yuk. */
53: memset (a->name, 0, 32);
54: strncpy (a->name, (const char *)filebuf + 0x1B1, *(filebuf + 0x1B0));
55: sizeleft = a->size = readlong (filebuf, 0x144);
1.1.1.2 ! root 56: a->data = (unsigned char *)xmalloc(a->size);
1.1 root 57:
58: numblocks = readlong (filebuf, 0x8);
59: blockpos = 0x134;
60: datapos = a->data;
61: while (numblocks)
62: {
63: unsigned char *databuf = filemem + 512*readlong (filebuf, blockpos);
64: int readsize = sizeleft > 488 ? 488 : sizeleft;
65: memcpy (datapos, databuf + 0x18, readsize);
66: datapos += readsize;
67: sizeleft -= readsize;
1.1.1.2 ! root 68:
1.1 root 69: blockpos -= 4;
70: numblocks--;
71: if (!numblocks) {
1.1.1.2 ! root 72: uae_u32 nextflb = readlong (filebuf, 0x1F8);
1.1 root 73: if (nextflb) {
74: filebuf = filemem + 512*nextflb;
75: blockpos = 0x134;
76: numblocks = readlong (filebuf, 0x8);
77: if (!filebuf) {
78: fprintf(stderr, "Disk structure corrupted. Use DISKDOCTOR to correct it.\n");
79: abort ();
80: }
81: }
82: }
83: }
84: return a;
85: }
86:
87: static directory *read_dir (unsigned char *dirbuf)
88: {
1.1.1.2 ! root 89: directory *d = (directory *)xmalloc(sizeof(directory));
! 90: uae_u32 hashsize;
! 91: uae_u32 i;
! 92:
1.1 root 93: memset (d->name, 0, 32);
94: strncpy (d->name, (const char *)dirbuf + 0x1B1, *(dirbuf + 0x1B0));
95: d->sibling = 0;
96: d->subdirs = 0;
97: d->files = 0;
98: hashsize = readlong (dirbuf, 0xc);
99: if (!hashsize)
1.1.1.2 ! root 100: hashsize = 72;
1.1 root 101: if (hashsize != 72)
1.1.1.2 ! root 102: fprintf(stderr, "Warning: Hash table with != 72 entries.\n");
1.1 root 103: for (i = 0; i < hashsize; i++) {
1.1.1.2 ! root 104: uae_u32 subblock = readlong (dirbuf, 0x18 + 4*i);
! 105: while (subblock) {
1.1 root 106: directory *subdir;
107: afile *subfile;
108: unsigned char *subbuf = filemem + 512*subblock;
1.1.1.2 ! root 109:
1.1 root 110: switch (readlong (subbuf, 0x1FC)) {
111: case 0x00000002:
112: subdir = read_dir (subbuf);
113: subdir->sibling = d->subdirs;
114: d->subdirs = subdir;
115: break;
1.1.1.2 ! root 116:
1.1 root 117: case 0xFFFFFFFD:
118: subfile = read_file (subbuf);
119: subfile->sibling = d->files;
120: d->files = subfile;
121: break;
1.1.1.2 ! root 122:
1.1 root 123: default:
124: fprintf(stderr, "Disk structure corrupted. Use DISKDOCTOR to correct it.\n");
125: abort ();
126: }
127: subblock = readlong (subbuf, 0x1F0);
128: }
129: }
130: return d;
131: }
132:
133: static void writedir(directory *dir)
134: {
135: directory *subdir;
136: afile *f;
1.1.1.2 ! root 137:
! 138: if (mkdir (dir->name, 0777) < 0 && errno != EEXIST) {
1.1 root 139: fprintf(stderr, "Could not create directory \"%s\". Giving up.\n", dir->name);
1.1.1.2 ! root 140: exit (20);
1.1 root 141: }
142: if (chdir (dir->name) < 0) {
143: fprintf(stderr, "Could not enter directory \"%s\". Giving up.\n", dir->name);
144: exit (20);
145: }
146: for (subdir = dir->subdirs; subdir; subdir = subdir->sibling)
1.1.1.2 ! root 147: writedir (subdir);
1.1 root 148: for (f = dir->files; f; f = f->sibling) {
149: int fd = creat (f->name, 0666);
150: if (fd < 0) {
151: fprintf(stderr, "Could not create file. Giving up.\n");
152: exit (20);
153: }
154: write (fd, f->data, f->size);
155: close (fd);
1.1.1.2 ! root 156: }
1.1 root 157: chdir ("..");
158: }
159:
160: int main(int argc, char **argv)
161: {
162: directory *root;
163: FILE *inf;
164: if (argc < 2 || argc > 3) {
165: fprintf(stderr, "Usage: readdisk <file> [<destdir>]\n");
166: exit (20);
167: }
168: inf = fopen(argv[1], "rb");
169: if (inf == NULL) {
170: fprintf(stderr, "can't open file\n");
171: exit (20);
172: }
173: fread(filemem, 1, 901120, inf);
1.1.1.2 ! root 174:
1.1 root 175: if (strncmp((const char *)filemem, "DOS\0", 4) != 0) {
176: fprintf(stderr, "Not a DOS disk.\n");
177: exit (20);
178: }
179: root = read_dir (filemem + 880*512);
180:
181: if (argc == 3)
1.1.1.2 ! root 182: if (chdir (argv[2]) < 0) {
1.1 root 183: fprintf(stderr, "Couldn't change to %s. Giving up.\n", argv[2]);
184: exit (20);
185: }
186: writedir (root);
187: return 0;
188: }
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