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3eb1bc67b1
Allow true/false, yes/no, 1/0. Throw elog warning if anything else. Allow shorter strings, so "t", "tr", "tru" and "true" match "true". Old behavior accepted anything starting with "t" as TRUE, everything else as FALSE.
119 lines
2.3 KiB
C
119 lines
2.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* bool.c--
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* Functions for the built-in type "bool".
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/bool.c,v 1.9 1997/10/25 05:09:58 thomas Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include <string.h>
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#include "postgres.h"
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#include "utils/builtins.h" /* where the declarations go */
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#include "utils/palloc.h"
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/*****************************************************************************
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* USER I/O ROUTINES *
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*****************************************************************************/
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/*
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* boolin - converts "t" or "f" to 1 or 0
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*
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* Check explicitly for "true/false" and TRUE/FALSE, 1/0, YES/NO.
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* Reject other values. - thomas 1997-10-05
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*
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* In the switch statement, check the most-used possibilities first.
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*/
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bool
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boolin(char *b)
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{
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switch(*b) {
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case 't':
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case 'T':
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if (strncasecmp(b, "true", strlen(b)) == 0)
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return (TRUE);
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break;
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case 'f':
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case 'F':
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if (strncasecmp(b, "false", strlen(b)) == 0)
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return (FALSE);
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break;
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case 'y':
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case 'Y':
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if (strncasecmp(b, "yes", strlen(b)) == 0)
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return (TRUE);
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break;
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case '1':
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if (strncasecmp(b, "1", strlen(b)) == 0)
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return (TRUE);
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break;
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case 'n':
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case 'N':
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if (strncasecmp(b, "no", strlen(b)) == 0)
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return (FALSE);
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break;
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case '0':
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if (strncasecmp(b, "0", strlen(b)) == 0)
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return (FALSE);
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break;
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default:
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break;
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}
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elog(WARN,"Invalid input string '%s'\n", b);
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return (FALSE);
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} /* boolin() */
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/*
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* boolout - converts 1 or 0 to "t" or "f"
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*/
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char *
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boolout(bool b)
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{
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char *result = (char *) palloc(2);
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*result = (b) ? 't' : 'f';
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result[1] = '\0';
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return (result);
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} /* boolout() */
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/*****************************************************************************
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* PUBLIC ROUTINES *
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*****************************************************************************/
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bool
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booleq(bool arg1, bool arg2)
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{
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return (arg1 == arg2);
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}
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bool
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boolne(bool arg1, bool arg2)
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{
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return (arg1 != arg2);
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}
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bool
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boollt(bool arg1, bool arg2)
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{
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return (arg1 < arg2);
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}
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bool
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boolgt(bool arg1, bool arg2)
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{
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return (arg1 > arg2);
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}
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