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Make sure sqlite3_value_bytes() does not reformat the content after a

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call to sqlite3_value_blob().  Add documentation to explain this hazard.
Add many new tests.  Ticket #2321. (CVS 3880)

FossilOrigin-Name: e92bd97a3726bbb7978489e2994747127c4aefcf
This commit is contained in:
drh
2007-04-27 17:16:20 +00:00
parent ba6d351486
commit 9310ef23e2
8 changed files with 430 additions and 35 deletions
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20
src/func.c
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@@ -16,7 +16,7 @@
** sqliteRegisterBuildinFunctions() found at the bottom of the file.
** All other code has file scope.
**
** $Id: func.c,v 1.141 2007/04/27 01:18:03 drh Exp $
** $Id: func.c,v 1.142 2007/04/27 17:16:20 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
@@ -215,11 +215,12 @@ static void roundFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
static void upperFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
char *z1;
const char *z2;
int i;
int i, n;
if( argc<1 || SQLITE_NULL==sqlite3_value_type(argv[0]) ) return;
n = sqlite3_value_bytes(argv[0]);
z2 = (char*)sqlite3_value_text(argv[0]);
if( z2 ){
z1 = sqlite3_malloc(sqlite3_value_bytes(argv[0])+1);
z1 = sqlite3_malloc(n+1);
if( z1 ){
strcpy(z1, z2);
for(i=0; z1[i]; i++){
@@ -232,11 +233,12 @@ static void upperFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
static void lowerFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
char *z1;
const char *z2;
int i;
int i, n;
if( argc<1 || SQLITE_NULL==sqlite3_value_type(argv[0]) ) return;
n = sqlite3_value_bytes(argv[0]);
z2 = (char*)sqlite3_value_text(argv[0]);
if( z2 ){
z1 = sqlite3_malloc(sqlite3_value_bytes(argv[0])+1);
z1 = sqlite3_malloc(n+1);
if( z1 ){
strcpy(z1, z2);
for(i=0; z1[i]; i++){
@@ -703,15 +705,15 @@ static void replaceFunc(
int i, j; /* Loop counters */
assert( argc==3 );
nStr = sqlite3_value_bytes(argv[0]);
zStr = sqlite3_value_text(argv[0]);
if( zStr==0 ) return;
nStr = sqlite3_value_bytes(argv[0]);
nPattern = sqlite3_value_bytes(argv[1]);
zPattern = sqlite3_value_text(argv[1]);
if( zPattern==0 || zPattern[0]==0 ) return;
nPattern = sqlite3_value_bytes(argv[1]);
nRep = sqlite3_value_bytes(argv[2]);
zRep = sqlite3_value_text(argv[2]);
if( zRep==0 ) return;
nRep = sqlite3_value_bytes(argv[2]);
if( nPattern>=nRep ){
nOut = nStr;
}else{
@@ -754,9 +756,9 @@ static void trimFunc(
if( sqlite3_value_type(argv[0])==SQLITE_NULL ){
return;
}
nIn = sqlite3_value_bytes(argv[0]);
zIn = sqlite3_value_text(argv[0]);
if( zIn==0 ) return;
nIn = sqlite3_value_bytes(argv[0]);
if( argc==1 ){
static const unsigned char zSpace[] = " ";
zCharSet = zSpace;