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Add the sqliteErrorMsg() function and use it to generate error message

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text during parsing and code generation.  This simplifies the code
somewhat and makes it easier to handle names with a database prefix. (CVS 891)

FossilOrigin-Name: 1d3fc977211abdc7ba3fd51d661863e8ce5aef69
This commit is contained in:
drh
2003-03-31 02:12:46 +00:00
parent 1c2d84148a
commit da93d238c2
11 changed files with 228 additions and 175 deletions
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130
src/util.c
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@@ -14,7 +14,7 @@
** This file contains functions for allocating memory, comparing
** strings, and stuff like that.
**
** $Id: util.c,v 1.58 2003/02/16 22:21:32 drh Exp $
** $Id: util.c,v 1.59 2003/03/31 02:12:48 drh Exp $
*/
#include "sqliteInt.h"
#include <stdarg.h>
@@ -392,6 +392,134 @@ void sqliteSetNString(char **pz, ...){
va_end(ap);
}
/*
** Add an error message to pParse->zErrMsg and increment pParse->nErr.
** The following formatting characters are allowed:
**
** %s Insert a string
** %z A string that should be freed after use
** %d Insert an integer
** %T Insert a token
** %S Insert the first element of a SrcList
*/
void sqliteErrorMsg(Parse *pParse, const char *zFormat, ...){
va_list ap;
int nByte;
int i, j;
char *z;
static char zNull[] = "NULL";
pParse->nErr++;
nByte = 1 + strlen(zFormat);
va_start(ap, zFormat);
for(i=0; zFormat[i]; i++){
if( zFormat[i]!='%' && zFormat[i+1] ) continue;
i++;
switch( zFormat[i] ){
case 'd': {
(void)va_arg(ap, int);
nByte += 20;
break;
}
case 'z':
case 's': {
char *z2 = va_arg(ap, char*);
if( z2==0 ) z2 = zNull;
nByte += strlen(z2);
break;
}
case 'T': {
Token *p = va_arg(ap, Token*);
nByte += p->n;
break;
}
case 'S': {
SrcList *p = va_arg(ap, SrcList*);
int k = va_arg(ap, int);
assert( p->nSrc>k && k>=0 );
nByte += strlen(p->a[k].zName);
if( p->a[k].zDatabase && p->a[k].zDatabase[0] ){
nByte += strlen(p->a[k].zDatabase)+1;
}
break;
}
default: {
nByte++;
break;
}
}
}
va_end(ap);
z = sqliteMalloc( nByte );
if( z==0 ) return;
sqliteFree(pParse->zErrMsg);
pParse->zErrMsg = z;
va_start(ap, zFormat);
for(i=j=0; zFormat[i]; i++){
if( zFormat[i]!='%' ) continue;
if( i>j ){
memcpy(z, &zFormat[j], i-j);
z += i-j;
}
j = i+2;
i++;
switch( zFormat[i] ){
case 'd': {
int x = va_arg(ap, int);
sprintf(z, "%d", x);
z += strlen(z);
break;
}
case 'z':
case 's': {
int len;
char *z2 = va_arg(ap, char*);
if( z2==0 ) z2 = zNull;
len = strlen(z2);
memcpy(z, z2, len);
z += len;
if( zFormat[i]=='z' && z2!=zNull ){
sqliteFree(z2);
}
break;
}
case 'T': {
Token *p = va_arg(ap, Token*);
memcpy(z, p->z, p->n);
z += p->n;
break;
}
case 'S': {
int len;
SrcList *p = va_arg(ap, SrcList*);
int k = va_arg(ap, int);
assert( p->nSrc>k && k>=0 );
if( p->a[k].zDatabase && p->a[k].zDatabase[0] ){
len = strlen(p->a[k].zDatabase);
memcpy(z, p->a[k].zDatabase, len);
z += len;
*(z++) = '.';
}
len = strlen(p->a[k].zName);
memcpy(z, p->a[k].zName, len);
z += len;
break;
}
default: {
*(z++) = zFormat[i];
break;
}
}
}
va_end(ap);
if( i>j ){
memcpy(z, &zFormat[j], i-j);
z += i-j;
}
assert( (z - pParse->zErrMsg) < nByte );
*z = 0;
}
/*
** Convert an SQL-style quoted string into a normal string by removing
** the quote characters. The conversion is done in-place. If the