/*
** Convert an SQL-style quoted string into a normal string by removing
** the quote characters. The conversion is done in-place. If the
** input does not begin with a quote character, then this routine
** is a no-op.
**
** Examples:
**
** "abc" becomes abc
** 'xyz' becomes xyz
** [pqr] becomes pqr
** `mno` becomes mno
*/
void sqlite3Fts5Dequote(char *z){
char quote; /* Quote character (if any ) */
assert( 0==fts5_iswhitespace(z[0]) );
quote = z[0];
if( quote=='[' || quote=='\'' || quote=='"' || quote=='`' ){
fts5Dequote(z);
}
}
/*
** Gobble up the first bareword or quoted word from the input buffer zIn.
** Return a pointer to the character immediately following the last in
** the gobbled word if successful, or a NULL pointer otherwise (failed
** to find close-quote character).
**
** Before returning, set pzOut to point to a new buffer containing a
** nul-terminated, dequoted copy of the gobbled word. If the word was
** quoted, *pbQuoted is also set to 1 before returning.
**
** If *pRc is other than SQLITE_OK when this function is called, it is
** a no-op (NULL is returned). Otherwise, if an OOM occurs within this
** function, *pRc is set to SQLITE_NOMEM before returning. *pRc is *not*
** set if a parse error (failed to find close quote) occurs.
*/
static const char *fts5ConfigGobbleWord(
int *pRc, /* IN/OUT: Error code */
const char *zIn, /* Buffer to gobble string/bareword from */
char **pzOut, /* OUT: malloc'd buffer containing str/bw */
int *pbQuoted /* OUT: Set to true if dequoting required */
){
const char *zRet = 0;
int nIn = (int)strlen(zIn);
char *zOut = sqlite3_malloc(nIn+1);
assert( *pRc==SQLITE_OK );
*pbQuoted = 0;
*pzOut = 0;
if( zOut==0 ){
*pRc = SQLITE_NOMEM;
}else{
memcpy(zOut, zIn, nIn+1);
if( fts5_isopenquote(zOut[0]) ){
int ii = fts5Dequote(zOut);
zRet = &zIn[ii];
*pbQuoted = 1;
}else{
zRet = fts5ConfigSkipBareword(zIn);
if( zRet ){
zOut[zRet-zIn] = '\0';
}
}
}
if( zRet==0 ){
sqlite3_free(zOut);
}else{
*pzOut = zOut;
}
return zRet;
}
