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Fix quote_ident to use quote_identifier rather than its own, not quite

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up-to-speed logic; in particular this will cause it to quote names that
match keywords.  Remove unnecessary multibyte cruft from quote_literal
(all backend-internal encodings are 8-bit-safe).
This commit is contained in:
Tom Lane 2005-03-21 16:29:20 +00:00
parent 6a8eb1a7b6
commit 775d28302c
1 changed files with 37 additions and 145 deletions
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182
src/backend/utils/adt/quote.c
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@ -7,23 +7,15 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/quote.c,v 1.14 2005/01/01 05:43:07 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/quote.c,v 1.15 2005/03/21 16:29:20 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include <ctype.h>
#include "mb/pg_wchar.h"
#include "utils/builtins.h"
static bool quote_ident_required(text *iptr);
static text *do_quote_ident(text *iptr);
static text *do_quote_literal(text *iptr);
/*
* quote_ident -
* returns a properly quoted identifier
@ -33,16 +25,22 @@ quote_ident(PG_FUNCTION_ARGS)
{
text *t = PG_GETARG_TEXT_P(0);
text *result;
const char *qstr;
char *str;
int len;
if (quote_ident_required(t))
result = do_quote_ident(t);
else
{
result = (text *) palloc(VARSIZE(t));
memcpy(result, t, VARSIZE(t));
}
/* We have to convert to a C string to use quote_identifier */
len = VARSIZE(t) - VARHDRSZ;
str = (char *) palloc(len + 1);
memcpy(str, VARDATA(t), len);
str[len] = '\0';
PG_FREE_IF_COPY(t, 0);
qstr = quote_identifier(str);
len = strlen(qstr);
result = (text *) palloc(len + VARHDRSZ);
VARATT_SIZEP(result) = len + VARHDRSZ;
memcpy(VARDATA(result), qstr, len);
PG_RETURN_TEXT_P(result);
}
@ -56,136 +54,30 @@ quote_literal(PG_FUNCTION_ARGS)
{
text *t = PG_GETARG_TEXT_P(0);
text *result;
char *cp1;
char *cp2;
int len;
result = do_quote_literal(t);
len = VARSIZE(t) - VARHDRSZ;
/* We make a worst-case result area; wasting a little space is OK */
result = (text *) palloc(len * 2 + 2 + VARHDRSZ);
PG_FREE_IF_COPY(t, 0);
cp1 = VARDATA(t);
cp2 = VARDATA(result);
*cp2++ = '\'';
while (len-- > 0)
{
if (*cp1 == '\'')
*cp2++ = '\'';
else if (*cp1 == '\\')
*cp2++ = '\\';
*cp2++ = *cp1++;
}
*cp2++ = '\'';
VARATT_SIZEP(result) = cp2 - ((char *) result);
PG_RETURN_TEXT_P(result);
}
/*
* Check if a given identifier needs quoting
*/
static bool
quote_ident_required(text *iptr)
{
char *cp;
char *ep;
cp = VARDATA(iptr);
ep = VARDATA(iptr) + VARSIZE(iptr) - VARHDRSZ;
if (cp >= ep)
return true;
if (pg_mblen(cp) != 1)
return true;
if (!(*cp == '_' || (*cp >= 'a' && *cp <= 'z')))
return true;
while ((++cp) < ep)
{
if (pg_mblen(cp) != 1)
return true;
if (*cp >= 'a' && *cp <= 'z')
continue;
if (*cp >= '0' && *cp <= '9')
continue;
if (*cp == '_')
continue;
return true;
}
return false;
}
/*
* Return a properly quoted identifier
*/
static text *
do_quote_ident(text *iptr)
{
text *result;
char *cp1;
char *cp2;
int len;
int wl;
len = VARSIZE(iptr) - VARHDRSZ;
result = (text *) palloc(len * 2 + VARHDRSZ + 2);
cp1 = VARDATA(iptr);
cp2 = VARDATA(result);
*cp2++ = '"';
while (len > 0)
{
if ((wl = pg_mblen(cp1)) != 1)
{
len -= wl;
while (wl-- > 0)
*cp2++ = *cp1++;
continue;
}
if (*cp1 == '"')
*cp2++ = '"';
*cp2++ = *cp1++;
len--;
}
*cp2++ = '"';
VARATT_SIZEP(result) = cp2 - ((char *) result);
return result;
}
/*
* Return a properly quoted literal value
*/
static text *
do_quote_literal(text *lptr)
{
text *result;
char *cp1;
char *cp2;
int len;
int wl;
len = VARSIZE(lptr) - VARHDRSZ;
result = (text *) palloc(len * 2 + VARHDRSZ + 2);
cp1 = VARDATA(lptr);
cp2 = VARDATA(result);
*cp2++ = '\'';
while (len > 0)
{
if ((wl = pg_mblen(cp1)) != 1)
{
len -= wl;
while (wl-- > 0)
*cp2++ = *cp1++;
continue;
}
if (*cp1 == '\'')
*cp2++ = '\'';
if (*cp1 == '\\')
*cp2++ = '\\';
*cp2++ = *cp1++;
len--;
}
*cp2++ = '\'';
VARATT_SIZEP(result) = cp2 - ((char *) result);
return result;
}