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patches 00-14 from David Mansfield

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This commit is contained in:
brianb
2004-01-06 00:42:07 +00:00
parent 8592cf5db5
commit 11b43644dc
12 changed files with 293 additions and 166 deletions
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92
src/libmdb/data.c
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@@ -26,6 +26,7 @@
#endif
#define MDB_DEBUG_OLE 0
#define OFFSET_MASK 0x1fff
char *mdb_money_to_string(MdbHandle *mdb, int start, char *s);
static int _mdb_attempt_bind(MdbHandle *mdb,
@@ -33,6 +34,13 @@ static int _mdb_attempt_bind(MdbHandle *mdb,
char *mdb_num_to_string(MdbHandle *mdb, int start, int datatype, int prec, int scale);
int mdb_copy_ole(MdbHandle *mdb, char *dest, int start, int size);
static char date_fmt[64] = "%x %X";
void mdb_set_date_fmt(const char *fmt)
{
date_fmt[63] = 0;
strncpy(date_fmt, fmt, 63);
}
void mdb_bind_column(MdbTableDef *table, int col_num, void *bind_ptr)
{
@@ -73,29 +81,31 @@ mdb_find_end_of_row(MdbHandle *mdb, int row)
MdbFormatConstants *fmt = mdb->fmt;
int row_end;
/* Search the previous "row start" values for the first non-deleted one.
/* Search the previous "row start" values for the first non-'lookupflag' one.
* If we don't find one, then the end of the page is the correct value.
*/
#if 1
if (row==0) {
row_end = fmt->pg_size - 1;
} else {
row_end = (mdb_pg_get_int16(mdb, ((fmt->row_count_offset + 2) + (row - 1) * 2)) & 0x0FFF) - 1;
row_end = (mdb_pg_get_int16(mdb, ((fmt->row_count_offset + 2) + (row - 1) * 2)) & OFFSET_MASK) - 1;
}
return row_end;
#else
int i, row_start;
/* if lookupflag is not set, it's good (deleteflag is ok) */
for (i = row - 1; i >= 0; i--) {
row_start = mdb_pg_get_int16(mdb, ((fmt->row_count_offset + 2) + i * 2));
if (!(row_start & 0x8000)) {
break;
}
}
row_start &= 0x0FFF;
if (i == -1) {
row_end = fmt->pg_size - 1;
} else {
row_end = row_start - 1;
row_end = (row_start & OFFSET_MASK) - 1;
}
return row_end;
#endif
@@ -195,13 +205,16 @@ int mdb_read_row(MdbTableDef *table, int row)
MdbField fields[256];
int num_fields;
if (table->num_rows <= row)
return 0;
row_start = mdb_pg_get_int16(mdb, (fmt->row_count_offset + 2) + (row*2));
row_end = mdb_find_end_of_row(mdb, row);
delflag = lookupflag = 0;
if (row_start & 0x8000) lookupflag++;
if (row_start & 0x4000) delflag++;
row_start &= 0x0FFF; /* remove flags */
row_start &= OFFSET_MASK; /* remove flags */
#if MDB_DEBUG
fprintf(stdout,"Row %d bytes %d to %d %s %s\n",
row, row_start, row_end,
@@ -284,7 +297,7 @@ int mdb_read_row(MdbTableDef *table, int row)
}
/* if fixed columns add up to more than 256, we need a jump */
if (col_start >= 256) {
if (IS_JET3(mdb) && col_start >= 256) {
num_of_jumps++;
jumps_used++;
row_start = row_start + col_start - (col_start % 256);
@@ -423,25 +436,48 @@ int pgnum, i, bitn;
int
mdb_read_next_dpg_by_map1(MdbTableDef *table)
{
MdbCatalogEntry *entry = table->entry;
MdbHandle *mdb = entry->mdb;
guint32 pgnum, i, j, bitn, map_pg;
MdbCatalogEntry *entry = table->entry;
MdbHandle *mdb = entry->mdb;
guint32 pgnum, i, j, bitn, map_pg, map_ind, offset, bit_offset;
pgnum = 0;
/*
* table->cur_phys_pg will tell us where to (re)start the scan
* for the next data page. each usage_map entry points to a
* 0x05 page which bitmaps (mdb->fmt->pg_size - 4) * 8 pages.
*
* map_ind gives us the starting usage_map entry
* offset gives us a page offset into the bitmap (must be converted
* to bytes and bits).
*/
pgnum = table->cur_phys_pg + 1;
map_ind = pgnum / ((mdb->fmt->pg_size - 4) * 8);
offset = pgnum % ((mdb->fmt->pg_size - 4) * 8);
bit_offset = offset % 8;
//printf("map size %ld\n", table->map_sz);
for (i=1;i<table->map_sz-1;i+=4) {
for (i = 4 * map_ind + 1;i < table->map_sz-1; i += 4) {
map_pg = mdb_get_int32(table->usage_map, i);
//printf("loop %d pg %ld %02x%02x%02x%02x\n",i, map_pg,table->usage_map[i],table->usage_map[i+1],table->usage_map[i+2],table->usage_map[i+3]);
if (!map_pg) continue;
/* if the usage_map entry is empty, skip it, but advance the page counter */
if (!map_pg) {
pgnum += (mdb->fmt->pg_size - 4) * 8;
continue;
}
if(mdb_read_alt_pg(mdb, map_pg) != mdb->fmt->pg_size) {
fprintf(stderr, "Oops! didn't get a full page at %d\n", map_pg);
exit(1);
}
//printf("reading page %ld\n",map_pg);
for (j=4;j<mdb->fmt->pg_size;j++) {
for (bitn=0;bitn<8;bitn++) {
/* first time through, start j, bitn based on the starting offset
* after that, reset offset to 0 to start at the beginning of the page/byte
*/
for (j=4 + offset;j<mdb->fmt->pg_size;j++) {
for (bitn=bit_offset;bitn<8;bitn++) {
if (mdb->alt_pg_buf[j] & 1 << bitn && pgnum > table->cur_phys_pg) {
table->cur_phys_pg = pgnum;
if (!mdb_read_pg(mdb, pgnum)) {
@@ -453,7 +489,9 @@ guint32 pgnum, i, j, bitn, map_pg;
}
pgnum++;
}
bit_offset = 0;
}
offset = 0;
}
/* didn't find anything */
//printf("returning 0\n");
@@ -940,12 +978,26 @@ gint32 l;
}
return text;
}
static int trim_trailing_zeros(char * buff, int n)
{
char * p = buff + n - 1;
while (p >= buff && *p == '0')
*p-- = '\0';
if (*p == '.')
*p = '\0';
}
char *mdb_col_to_string(MdbHandle *mdb, unsigned char *buf, int start, int datatype, int size)
{
/* FIX ME -- not thread safe */
static char text[MDB_BIND_SIZE];
time_t t;
int i;
int i, n;
float tf;
double td;
switch (datatype) {
case MDB_BOOL:
@@ -965,11 +1017,15 @@ int i;
return text;
break;
case MDB_FLOAT:
sprintf(text,"%f",mdb_get_single(buf, start));
tf = mdb_get_single(mdb, start);
n = sprintf(text,"%.*f",FLT_DIG - (int)ceil(log10(tf)), tf);
trim_trailing_zeros(text, n);
return text;
break;
case MDB_DOUBLE:
sprintf(text,"%f",mdb_get_double(buf, start));
td = mdb_get_double(mdb, start);
n = sprintf(text,"%.*f",DBL_DIG - (int)ceil(log10(td)), td);
trim_trailing_zeros(text, n);
return text;
break;
case MDB_TEXT:
@@ -1001,7 +1057,7 @@ int i;
break;
case MDB_SDATETIME:
t = (long int)((mdb_get_double(buf, start) - 25569.0) * 86400.0);
strftime(text, MDB_BIND_SIZE, "%x %X",
strftime(text, MDB_BIND_SIZE, date_fmt,
(struct tm*)gmtime(&t));
return text;