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Accept 'on' and 'off' as input for boolean data type, unifying the syntax

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that the data type and GUC accepts.

ITAGAKI Takahiro
This commit is contained in:
Peter Eisentraut
2009-03-09 14:34:35 +00:00
parent fd497ab650
commit 05a7db0582
7 changed files with 149 additions and 115 deletions
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141
src/backend/utils/adt/bool.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/bool.c,v 1.45 2009/01/01 17:23:49 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/bool.c,v 1.46 2009/03/09 14:34:34 petere Exp $
*
*-------------------------------------------------------------------------
*/
@ -20,6 +20,99 @@
#include "libpq/pqformat.h"
#include "utils/builtins.h"
/*
* Try to interpret value as boolean value. Valid values are: true,
* false, yes, no, on, off, 1, 0; as well as unique prefixes thereof.
* If the string parses okay, return true, else false.
* If okay and result is not NULL, return the value in *result.
*/
bool
parse_bool(const char *value, bool *result)
{
return parse_bool_with_len(value, strlen(value), result);
}
bool
parse_bool_with_len(const char *value, size_t len, bool *result)
{
switch (*value)
{
case 't':
case 'T':
if (pg_strncasecmp(value, "true", len) == 0)
{
if (result)
*result = true;
return true;
}
break;
case 'f':
case 'F':
if (pg_strncasecmp(value, "false", len) == 0)
{
if (result)
*result = false;
return true;
}
break;
case 'y':
case 'Y':
if (pg_strncasecmp(value, "yes", len) == 0)
{
if (result)
*result = true;
return true;
}
break;
case 'n':
case 'N':
if (pg_strncasecmp(value, "no", len) == 0)
{
if (result)
*result = false;
return true;
}
break;
case 'o':
case 'O':
/* 'o' is not unique enough */
if (pg_strncasecmp(value, "on", (len > 2 ? len : 2)) == 0)
{
if (result)
*result = true;
return true;
}
else if (pg_strncasecmp(value, "off", (len > 2 ? len : 2)) == 0)
{
if (result)
*result = false;
return true;
}
break;
case '1':
if (len == 1)
{
if (result)
*result = true;
return true;
}
break;
case '0':
if (len == 1)
{
if (result)
*result = false;
return true;
}
break;
default:
break;
}
*result = false; /* suppress compiler warning */
return false;
}
/*****************************************************************************
* USER I/O ROUTINES *
*****************************************************************************/
@ -27,8 +120,8 @@
/*
* boolin - converts "t" or "f" to 1 or 0
*
* Check explicitly for "true/false" and TRUE/FALSE, 1/0, YES/NO.
* Reject other values. - thomas 1997-10-05
* Check explicitly for "true/false" and TRUE/FALSE, 1/0, YES/NO, ON/OFF.
* Reject other values.
*
* In the switch statement, check the most-used possibilities first.
*/
@ -38,6 +131,7 @@ boolin(PG_FUNCTION_ARGS)
const char *in_str = PG_GETARG_CSTRING(0);
const char *str;
size_t len;
bool result;
/*
* Skip leading and trailing whitespace
@ -50,45 +144,8 @@ boolin(PG_FUNCTION_ARGS)
while (len > 0 && isspace((unsigned char) str[len - 1]))
len--;
switch (*str)
{
case 't':
case 'T':
if (pg_strncasecmp(str, "true", len) == 0)
PG_RETURN_BOOL(true);
break;
case 'f':
case 'F':
if (pg_strncasecmp(str, "false", len) == 0)
PG_RETURN_BOOL(false);
break;
case 'y':
case 'Y':
if (pg_strncasecmp(str, "yes", len) == 0)
PG_RETURN_BOOL(true);
break;
case '1':
if (pg_strncasecmp(str, "1", len) == 0)
PG_RETURN_BOOL(true);
break;
case 'n':
case 'N':
if (pg_strncasecmp(str, "no", len) == 0)
PG_RETURN_BOOL(false);
break;
case '0':
if (pg_strncasecmp(str, "0", len) == 0)
PG_RETURN_BOOL(false);
break;
default:
break;
}
if (parse_bool_with_len(str, len, &result))
PG_RETURN_BOOL(result);
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),