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Fix deficiencies in sqlite_complete() pointed out by R. Dennis Cote. (CVS 955)

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FossilOrigin-Name: 54b33a5ed9f7a89435c2f1395a3177e8c778bb8a
This commit is contained in:
drh
2003-05-04 17:58:25 +00:00
parent 5640433e48
commit 7ad4334add
5 changed files with 236 additions and 141 deletions
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128
src/main.c
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@@ -14,7 +14,7 @@
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: main.c,v 1.129 2003/04/29 16:20:46 drh Exp $
** $Id: main.c,v 1.130 2003/05/04 17:58:26 drh Exp $
*/
#include "sqliteInt.h"
#include "os.h"
@@ -553,132 +553,6 @@ void sqlite_close(sqlite *db){
sqliteFree(db);
}
/*
** Return TRUE if the given SQL string ends in a semicolon.
**
** Special handling is require for CREATE TRIGGER statements.
** Whenever the CREATE TRIGGER keywords are seen, the statement
** must end with ";END;".
*/
int sqlite_complete(const char *zSql){
int isComplete = 1;
int requireEnd = 0;
int seenText = 0;
int seenCreate = 0;
while( *zSql ){
switch( *zSql ){
case ';': {
isComplete = 1;
seenText = 1;
seenCreate = 0;
break;
}
case ' ':
case '\r':
case '\t':
case '\n':
case '\f': {
break;
}
case '[': {
isComplete = 0;
seenText = 1;
seenCreate = 0;
zSql++;
while( *zSql && *zSql!=']' ){ zSql++; }
if( *zSql==0 ) return 0;
break;
}
case '"':
case '\'': {
int c = *zSql;
isComplete = 0;
seenText = 1;
seenCreate = 0;
zSql++;
while( *zSql && *zSql!=c ){ zSql++; }
if( *zSql==0 ) return 0;
break;
}
case '/': {
if( zSql[1]!='*' ){
isComplete = 0;
seenText = 1;
seenCreate = 0;
break;
}
zSql += 2;
while( zSql[0] && (zSql[0]!='*' || zSql[1]!='/') ){ zSql++; }
if( zSql[0]==0 ) return 0;
zSql += 2;
break;
}
case '-': {
if( zSql[1]!='-' ){
isComplete = 0;
seenCreate = 0;
break;
}
while( *zSql && *zSql!='\n' ){ zSql++; }
if( *zSql==0 ) return seenText && isComplete && requireEnd==0;
break;
}
case 'c':
case 'C': {
seenText = 1;
if( !isComplete ) break;
isComplete = 0;
if( sqliteStrNICmp(zSql, "create", 6)!=0 ) break;
if( !isspace(zSql[6]) ) break;
zSql += 5;
seenCreate = 1;
while( isspace(zSql[1]) ) zSql++;
if( sqliteStrNICmp(&zSql[1],"trigger", 7)!=0 ) break;
zSql += 7;
requireEnd++;
break;
}
case 't':
case 'T': {
seenText = 1;
if( !seenCreate ) break;
seenCreate = 0;
isComplete = 0;
if( sqliteStrNICmp(zSql, "trigger", 7)!=0 ) break;
if( !isspace(zSql[7]) ) break;
zSql += 6;
requireEnd++;
break;
}
case 'e':
case 'E': {
seenCreate = 0;
seenText = 1;
if( !isComplete ) break;
isComplete = 0;
if( requireEnd==0 ) break;
if( sqliteStrNICmp(zSql, "end", 3)!=0 ) break;
zSql += 2;
while( isspace(zSql[1]) ) zSql++;
if( zSql[1]==';' ){
zSql++;
isComplete = 1;
requireEnd--;
}
break;
}
default: {
seenCreate = 0;
seenText = 1;
isComplete = 0;
break;
}
}
zSql++;
}
return /* seenText && */ isComplete && requireEnd==0;
}
/*
** Rollback all database files.
*/