mirror of
https://github.com/mdbtools/mdbtools.git
synced 2025-10-21 02:57:42 +08:00
more index work
fixed gnome detection (i think) added back/forward navigation to gui debugger
This commit is contained in:
brianb
@@ -23,18 +23,34 @@ char idx_to_text[] = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 8-15 0x09-0x0f */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 16-23 0x10-0x17 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 24-31 0x19-0x1f */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 32-39 0x20-0x27 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 40-47 0x29-0x2f */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 48-55 0x30-0x37 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 56-63 0x39-0x3f */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 64-71 0x40-0x47 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 72-79 0x49-0x4f */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, '0', '1', /* 80-87 0x50-0x57 */
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'2', '3', '4', '5', '6', '7', '8', '9', /* 88-95 0x59-0x5f */
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'A', 'B', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 96-103 0x60-0x67 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 104-111 0x69-0x6f */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 112-119 0x70-0x77 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 /* 120-127 0x79-0x7f */
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' ', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 32-39 0x20-0x27 */
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0x00, 0x00, 0x00, 0x00, 0x00, ' ', ' ', 0x00, /* 40-47 0x29-0x2f */
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'V', 'W', 'X', 'Y', 'Z', '[', '\\', ']', /* 48-55 0x30-0x37 */
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'^', '_', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 56-63 0x39-0x3f */
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0x00, '`', 'a', 'b', 'd', 'f', 'g', 'h', /* 64-71 0x40-0x47 */
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'i', 'j', 'k', 'l', 'm', 'o', 'p', 'r', /* 72-79 0x49-0x4f H */
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's', 't', 'u', 'v', 'w', 'x', 'z', '{', /* 80-87 0x50-0x57 P */
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'|', '}', '~', '5', '6', '7', '8', '9', /* 88-95 0x59-0x5f */
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0x00, '`', 'a', 'b', 'd', 'f', 'g', 'h', /* 96-103 0x60-0x67 */
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'i', 'j', 'k', 'l', 'm', 'o', 'p', 'r', /* 014-111 0x69-0x6f h */
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's', 't', 'u', 'v', 'w', 'x', 'z', '{', /* 112-119 0x70-0x77 p */
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'|', '}', '~', 0x00, 0x00, 0x00, 0x00, 0x00, /* 120-127 0x78-0x7f */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 128-135 0x80-0x87 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa8-0xaf */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb0-0xb7 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb8-0xbf */
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0x00, 0x00, 0x00, 0x00, 0x00, '`', 0x00, 0x00, /* 0xc0-0xc7 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc8-0xcf */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xd0-0xd7 */
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xd8-0xdf */
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0x00, '`', 0x00, '`', '`', '`', 0x00, 0x00, /* 0xe0-0xe7 */
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'f', 'f', 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xe8-0xef */
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0x00, 0x00, 0x00, 'r', 0x00, 0x00, 'r', 0x00, /* 0xf0-0xf7 */
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0x81, 0x00, 0x00, 0x00, 'x', 0x00, 0x00, 0x00, /* 0xf8-0xff */
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};
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GPtrArray *mdb_read_indices(MdbTableDef *table)
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@@ -54,6 +70,7 @@ int name_sz;
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for (i=0;i<table->num_idxs;i++) {
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memset(&idx, '\0', sizeof(MdbIndex));
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idx.table = table;
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idx.index_num = mdb_get_int16(mdb, cur_pos);
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cur_pos += 19;
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idx.index_type = mdb->pg_buf[cur_pos++];
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@@ -110,6 +127,192 @@ int name_sz;
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pidx->flags = mdb->pg_buf[cur_pos++];
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}
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}
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void
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mdb_index_hash_text(guchar *text, guchar *hash)
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{
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int k;
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for (k=0;k<strlen(text);k++) {
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hash[k] = idx_to_text[text[k]];
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if (!(hash[k])) fprintf(stderr,
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"No translation available for %02x %d\n",
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text[k],text[k]);
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}
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hash[strlen(text)]=0;
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}
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guint32
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mdb_index_swap_int32(guint32 l)
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{
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unsigned char *c, *c2;
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guint32 l2;
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c = &l;
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c2 = &l2;
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c2[0]=c[3];
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c2[1]=c[2];
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c2[2]=c[1];
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c2[3]=c[0];
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return l2;
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}
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void mdb_index_cache_sarg(MdbColumn *col, MdbSarg *sarg, MdbSarg *idx_sarg)
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{
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guint32 cache_int;
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unsigned char *c;
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switch (col->col_type) {
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case MDB_TEXT:
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mdb_index_hash_text(sarg->value.s, idx_sarg->value.s);
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break;
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case MDB_LONGINT:
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idx_sarg->value.i = mdb_index_swap_int32(sarg->value.i);
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//cache_int = sarg->value.i * -1;
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c = &(idx_sarg->value.i);
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c[0] |= 0x80;
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printf("int %08x %02x %02x %02x %02x\n", sarg->value.i, c[0], c[1], c[2], c[3]);
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break;
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case MDB_INT:
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break;
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default:
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break;
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}
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}
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int
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mdb_index_test_sargs(MdbHandle *mdb, MdbIndex *idx, int offset, int len)
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{
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int i, j;
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MdbColumn *col;
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MdbTableDef *table = idx->table;
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MdbSarg *idx_sarg;
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MdbSarg *sarg;
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int c_offset = 0, c_len;
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for (i=0;i<idx->num_keys;i++) {
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c_offset++; /* the per column null indicator/flags */
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col=g_ptr_array_index(table->columns,idx->key_col_num[i]-1);
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/*
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* This will go away eventually
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*/
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if (col->col_type==MDB_TEXT) {
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c_len = strlen(&mdb->pg_buf[offset + c_offset]);
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} else {
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c_len = col->col_size;
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fprintf(stderr,"Only text types currently supported. How did we get here?\n");
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}
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/*
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* If we have no cached index values for this column,
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* create them.
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*/
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if (col->num_sargs && !col->idx_sarg_cache) {
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col->idx_sarg_cache = g_ptr_array_new();
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for (j=0;j<col->num_sargs;j++) {
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sarg = g_ptr_array_index (col->sargs, j);
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idx_sarg = g_memdup(sarg,sizeof(MdbSarg));
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printf("calling mdb_index_cache_sarg\n");
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mdb_index_cache_sarg(col, sarg, idx_sarg);
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g_ptr_array_add(col->idx_sarg_cache, idx_sarg);
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}
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}
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for (j=0;j<col->num_sargs;j++) {
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sarg = g_ptr_array_index (col->idx_sarg_cache, j);
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if (!mdb_test_sarg(mdb, col, sarg, offset + c_offset, c_len)) {
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/* sarg didn't match, no sense going on */
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return 0;
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}
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}
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}
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return 1;
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}
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int
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mdb_index_find_next_on_page(MdbHandle *mdb, MdbIndexPage *ipg)
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{
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do {
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//fprintf(stdout, "%d %d\n", ipg->mask_bit, ipg->mask_byte);
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ipg->mask_bit++;
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if (ipg->mask_bit==8) {
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ipg->mask_bit=0;
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ipg->mask_pos++;
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}
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ipg->mask_byte = mdb->pg_buf[ipg->mask_pos];
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ipg->len++;
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} while (ipg->mask_pos <= 0xf8 &&
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!((1 << ipg->mask_bit) & ipg->mask_byte));
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if (ipg->mask_pos>=0xf8)
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return 0;
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return ipg->len;
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}
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void mdb_index_page_init(MdbIndexPage *ipg)
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{
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ipg->offset = 0xf8; /* start byte of the index entries */
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ipg->mask_pos = 0x16;
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ipg->mask_bit=0;
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ipg->len = 0;
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}
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int
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mdb_find_next_leaf(MdbHandle *mdb, MdbIndexChain *chain)
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{
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MdbIndexPage *ipg;
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/*
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* If we are at the first page deep and it's not an index page then
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* we are simply done. (there is no page to find
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*/
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if (chain->cur_depth==1) {
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ipg = &(chain->pages[0]);
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if (mdb->pg_buf[0]==MDB_PAGE_LEAF ||
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mdb->pg_buf[0]==MDB_PAGE_DATA) {
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return ipg->pg;
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}
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}
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ipg = &(chain->pages[chain->cur_depth - 1]);
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/* no more pages */
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return 0;
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}
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int
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mdb_index_find_next(MdbHandle *mdb, MdbIndex *idx, MdbIndexChain *chain, guint32 *pg, guint16 *row)
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{
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MdbIndexPage *ipg;
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int passed = 0;
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if (!chain->cur_depth) {
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ipg = &(chain->pages[0]);
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mdb_index_page_init(ipg);
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chain->cur_depth = 1;
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ipg->pg = idx->first_pg;
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if (!mdb_find_next_leaf(mdb, chain))
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return 0;
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} else {
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ipg = &(chain->pages[chain->cur_depth - 1]);
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ipg->len = 0;
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}
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mdb_read_pg(mdb, ipg->pg);
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do {
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ipg->len = 0;
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if (!mdb_index_find_next_on_page(mdb, ipg))
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return 0;
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*row = mdb->pg_buf[ipg->offset + ipg->len - 1];
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*pg = mdb_get_int24_msb(mdb, ipg->offset + ipg->len - 4);
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passed = mdb_index_test_sargs(mdb, idx, ipg->offset, ipg->len);
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ipg->offset += ipg->len;
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} while (!passed);
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//fprintf(stdout,"len = %d pos %d\n", ipg->len, ipg->mask_pos);
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//buffer_dump(mdb->pg_buf, ipg->offset, ipg->offset+ipg->len-1);
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return ipg->len;
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}
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void mdb_index_walk(MdbTableDef *table, MdbIndex *idx)
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{
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MdbHandle *mdb = table->entry->mdb;
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@@ -23,16 +23,6 @@
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#define MDB_DEBUG_WRITE 1
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typedef struct {
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void *value;
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int siz;
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int start;
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unsigned char is_null;
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unsigned char is_fixed;
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int colnum;
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int offset;
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} MdbField;
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void
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_mdb_put_int16(unsigned char *buf, guint32 offset, guint32 value)
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{
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@@ -141,7 +131,7 @@ int eod, len; /* end of data */
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bit_num = i % 8;
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/* logic on nulls is reverse, 1 is not null, 0 is null */
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fields[i].is_null = nullmask[byte_num] & 1 << bit_num ? 0 : 1;
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printf("col %d is %s\n", i, fields[i].is_null ? "null" : "not null");
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//printf("col %d is %s\n", i, fields[i].is_null ? "null" : "not null");
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}
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/* find the end of data pointer */
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@@ -150,7 +140,7 @@ int eod, len; /* end of data */
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} else {
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eod = mdb->pg_buf[row_end-1-var_cols-bitmask_sz];
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}
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printf("eod is %d\n", eod);
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//printf("eod is %d\n", eod);
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if (IS_JET4(mdb)) {
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col_start = 2;
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@@ -178,7 +168,7 @@ int eod, len; /* end of data */
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if (!mdb_is_fixed_col(col) && ++var_cols_found <= var_cols) {
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if (var_cols_found==var_cols) {
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len=eod - col_start;
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printf("len = %d eod %d col_start %d\n",len, eod, col_start);
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//printf("len = %d eod %d col_start %d\n",len, eod, col_start);
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} else {
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if (IS_JET4(mdb)) {
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/* position of the var table
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@@ -195,7 +185,7 @@ int eod, len; /* end of data */
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bitmask_sz -
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var_cols_found - 1;
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len=mdb->pg_buf[var_entry_pos] - mdb->pg_buf[var_entry_pos+1];
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printf("%d %d %d %d\n", mdb->pg_buf[var_entry_pos-1],mdb->pg_buf[var_entry_pos],len, col_start);
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//printf("%d %d %d %d\n", mdb->pg_buf[var_entry_pos-1],mdb->pg_buf[var_entry_pos],len, col_start);
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}
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} /* if found==var_cols */
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if (len<0) len+=256;
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