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Added some consistency checks

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5583 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Björn Stenberg 2005-01-17 15:34:43 +00:00
parent e24a528499
commit c985fa0e52
1 changed files with 32 additions and 2 deletions
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34
apps/dbtree.c
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@ -47,6 +47,8 @@
#define BE32(_x_) _x_
#endif
#define ID3DB_VERSION 1
static int fd;
static int
@ -54,12 +56,13 @@ static int
songcount, albumcount, artistcount,
songlen, songarraylen,
albumlen, albumarraylen,
artistlen;
artistlen, initialized = 0;
int db_init(void)
{
unsigned int version;
unsigned int buf[12];
unsigned char* ptr = (char*)buf;
fd = open(ROCKBOX_DIR "/rockbox.id3db", O_RDONLY);
if (fd < 0) {
@ -68,7 +71,20 @@ int db_init(void)
}
read(fd, buf, 48);
if (ptr[0] != 'R' ||
ptr[1] != 'D' ||
ptr[2] != 'B')
{
DEBUGF("File is not a rockbox id3 database, aborting\n");
return -1;
}
version = BE32(buf[0]) & 0xff;
if (version != ID3DB_VERSION)
{
DEBUGF("Unsupported database version %d, aborting.\n");
return -1;
}
DEBUGF("Version: RDB%d\n", version);
songstart = BE32(buf[1]);
@ -93,7 +109,15 @@ int db_init(void)
DEBUGF("Number of artists: %d\n", artistcount);
DEBUGF("Artiststart: %x\n", artiststart);
DEBUGF("Artistlen: %d\n", artistlen);
if (songstart > albumstart ||
albumstart > artiststart)
{
DEBUGF("Corrupt id3db database, aborting.\n");
return -1;
}
initialized = 1;
return 0;
}
@ -108,6 +132,12 @@ int db_load(struct tree_context* c, bool* dir_buffer_full)
int table = c->currtable;
int extra = c->currextra;
if (!initialized) {
DEBUGF("ID3 database is not initialized.\n");
return 0;
}
c->dentry_size = 2 * sizeof(int);
DEBUGF("db_load(%d, %x)\n", table, extra);