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add -M option to mdb-ver

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make gmdb2 version match mainline code
new dissector for jet4 tdef pages in gmdb2
gmdb2 right mouse click behaviour bugfix
pre-compute index page bitmap in mdb_index_unpack_page() in preparation for index writes.
This commit is contained in:
brianb
2004-02-13 18:49:51 +00:00
parent a62f26df50
commit 3a9aa2ceb7
14 changed files with 255 additions and 57 deletions
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55
src/libmdb/index.c
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@@ -312,6 +312,42 @@ mdb_index_test_sargs(MdbHandle *mdb, MdbIndex *idx, unsigned char *buf, int len)
}
return 1;
}
/*
* unpack the pages bitmap
*/
int
mdb_index_unpack_page(MdbHandle *mdb, MdbIndexPage *ipg)
{
int mask_bit = 0;
int mask_pos = 0x16;
int mask_byte;
int start = 0xf8;
int elem = 0;
int len = 0;
ipg->idx_starts[elem++]=start;
//fprintf(stdout, "Unpacking index page %lu\n", ipg->pg);
do {
len = 0;
do {
mask_bit++;
if (mask_bit==8) {
mask_bit=0;
mask_pos++;
}
mask_byte = mdb->pg_buf[mask_pos];
len++;
} while (mask_pos <= 0xf8 && !((1 << mask_bit) & mask_byte));
//fprintf(stdout, "%d %d %d %d\n", mask_pos, mask_bit, mask_byte, len);
start += len;
if (mask_pos < 0xf8) ipg->idx_starts[elem++]=start;
} while (mask_pos < 0xf8);
return elem;
}
/*
* find the next entry on a page (either index or leaf). Uses state information
* stored in the MdbIndexPage across calls.
@@ -319,6 +355,22 @@ mdb_index_test_sargs(MdbHandle *mdb, MdbIndex *idx, unsigned char *buf, int len)
int
mdb_index_find_next_on_page(MdbHandle *mdb, MdbIndexPage *ipg)
{
int offset, len;
int ret = 0;
if (!ipg->pg) return 0;
/* if this page has not been unpacked to it */
if (!ipg->idx_starts[0])
mdb_index_unpack_page(mdb, ipg);
if (ipg->idx_starts[ipg->start_pos + 1]==0) return 0;
ipg->len = ipg->idx_starts[ipg->start_pos+1] - ipg->idx_starts[ipg->start_pos];
ipg->start_pos++;
/*
do {
//fprintf(stdout, "%d %d\n", ipg->mask_bit, ipg->mask_byte);
ipg->mask_bit++;
@@ -333,7 +385,7 @@ mdb_index_find_next_on_page(MdbHandle *mdb, MdbIndexPage *ipg)
if (ipg->mask_pos>=0xf8)
return 0;
*/
return ipg->len;
}
void mdb_index_page_reset(MdbIndexPage *ipg)
@@ -341,6 +393,7 @@ void mdb_index_page_reset(MdbIndexPage *ipg)
ipg->offset = 0xf8; /* start byte of the index entries */
ipg->mask_pos = 0x16;
ipg->mask_bit=0;
ipg->start_pos=0;
ipg->len = 0;
}
void mdb_index_page_init(MdbIndexPage *ipg)