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First cut of sarg (search argument) support.

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This commit is contained in:
brianb
2001-03-29 04:50:35 +00:00
parent ee6eacbe22
commit b40283a8f8
5 changed files with 172 additions and 27 deletions
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65
src/libmdb/data.c
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@@ -20,6 +20,8 @@
#include "mdbtools.h"
char *mdb_money_to_string(MdbHandle *mdb, int start, char *s);
static int _mdb_attempt_bind(MdbHandle *mdb,
MdbColumn *col, unsigned char isnull, int offset, int len);
#define MDB_DEBUG 0
@@ -92,7 +94,7 @@ int mdb_read_row(MdbTableDef *table, int row)
{
MdbHandle *mdb = table->entry->mdb;
MdbColumn *col;
int i, j;
int i, j, rc;
int num_cols, var_cols, fixed_cols;
int row_start, row_end;
int fixed_cols_found, var_cols_found;
@@ -102,6 +104,7 @@ int eod; /* end of data */
int delflag, lookupflag;
int bitmask_sz;
unsigned char null_mask[33]; /* 256 columns max / 8 bits per byte */
unsigned char isnull;
row_start = mdb_get_int16(mdb, 10+(row*2));
row_end = mdb_find_end_of_row(mdb, row);
@@ -157,13 +160,10 @@ unsigned char null_mask[33]; /* 256 columns max / 8 bits per byte */
col = g_ptr_array_index(table->columns,j);
if (mdb_is_fixed_col(col) &&
++fixed_cols_found <= fixed_cols) {
if (col->col_type == MDB_BOOL) {
mdb_xfer_bound_bool(mdb, col, mdb_is_null(null_mask, j+1));
} else if (mdb_is_null(null_mask, j+1)) {
mdb_xfer_bound_data(mdb, 0, col, 0);
} else {
mdb_xfer_bound_data(mdb,row_start + col_start, col, col->col_size);
}
isnull = mdb_is_null(null_mask, j+1);
rc = _mdb_attempt_bind(mdb, col, isnull,
row_start + col_start, col->col_size);
if (!rc) return 0;
col_start += col->col_size;
}
}
@@ -208,19 +208,34 @@ unsigned char null_mask[33]; /* 256 columns max / 8 bits per byte */
- var_cols_found
- 1 - num_of_jumps ] - col_start;
if (col->col_type == MDB_BOOL) {
mdb_xfer_bound_bool(mdb, col, mdb_is_null(null_mask, j+1));
} else if (mdb_is_null(null_mask, j+1)) {
mdb_xfer_bound_data(mdb, 0, col, 0);
} else {
mdb_xfer_bound_data(mdb,row_start + col_start, col, len);
}
isnull = mdb_is_null(null_mask, j+1);
rc = _mdb_attempt_bind(mdb, col, isnull,
row_start + col_start, len);
if (!rc) return 0;
col_start += len;
}
}
return 1;
}
static int _mdb_attempt_bind(MdbHandle *mdb,
MdbColumn *col,
unsigned char isnull,
int offset,
int len)
{
if (col->col_type == MDB_BOOL) {
mdb_xfer_bound_bool(mdb, col, isnull);
} else if (isnull) {
mdb_xfer_bound_data(mdb, 0, col, 0);
} else {
if (!mdb_test_sargs(mdb, col, offset, len)) {
return 0;
}
mdb_xfer_bound_data(mdb, offset, col, len);
}
return 1;
}
int mdb_read_next_dpg(MdbTableDef *table)
{
MdbCatalogEntry *entry = table->entry;
@@ -242,6 +257,7 @@ int mdb_fetch_row(MdbTableDef *table)
{
MdbHandle *mdb = table->entry->mdb;
int rows;
int rc;
if (table->num_rows==0)
return 0;
@@ -253,18 +269,19 @@ int rows;
mdb_read_next_dpg(table);
}
rows = mdb_get_int16(mdb,8);
do {
rows = mdb_get_int16(mdb,8);
/* if at end of page, find a new page */
if (table->cur_row >= rows) {
table->cur_row=0;
if (!mdb_read_next_dpg(table)) return 0;
}
/* if at end of page, find a new page */
if (table->cur_row >= rows) {
table->cur_row=0;
if (!mdb_read_next_dpg(table)) return 0;
}
mdb_read_row(table,
table->cur_row);
rc = mdb_read_row(table, table->cur_row);
table->cur_row++;
} while (!rc);
table->cur_row++;
return 1;
}
void mdb_data_dump(MdbTableDef *table)