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e2ded829f6
any amount of leading or trailing whitespace (where "whitespace" is defined by isspace()). This is for SQL conformance, as well as consistency with other numeric types (e.g. oid, numeric). Also refactor pg_atoi() to avoid looking at errno where not necessary, and add a bunch of regression tests for the input to these types.
156 lines
3.7 KiB
C
156 lines
3.7 KiB
C
/*-------------------------------------------------------------------------
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*
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* numutils.c
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* utility functions for I/O of built-in numeric types.
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*
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* integer: pg_atoi, pg_itoa, pg_ltoa
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*
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* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
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* Portions 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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* $PostgreSQL: pgsql/src/backend/utils/adt/numutils.c,v 1.62 2004/03/11 02:11:13 neilc Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include <errno.h>
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#include <math.h>
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#include <limits.h>
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#include <ctype.h>
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#include "utils/builtins.h"
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#ifndef INT_MAX
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#define INT_MAX (0x7FFFFFFFL)
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#endif
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#ifndef INT_MIN
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#define INT_MIN (-INT_MAX-1)
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#endif
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#ifndef SHRT_MAX
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#define SHRT_MAX (0x7FFF)
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#endif
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#ifndef SHRT_MIN
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#define SHRT_MIN (-SHRT_MAX-1)
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#endif
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#ifndef SCHAR_MAX
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#define SCHAR_MAX (0x7F)
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#endif
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#ifndef SCHAR_MIN
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#define SCHAR_MIN (-SCHAR_MAX-1)
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#endif
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/*
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* pg_atoi: convert string to integer
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*
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* 'size' is the sizeof() the desired integral result (1, 2, or 4 bytes).
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*
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* allows any number of leading or trailing whitespace characters.
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*
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* 'c' is the character that terminates the input string (after any
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* number of whitespace characters).
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*
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* Unlike plain atoi(), this will throw ereport() upon bad input format or
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* overflow.
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*/
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int32
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pg_atoi(char *s, int size, int c)
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{
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long l;
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char *badp;
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/*
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* Some versions of strtol treat the empty string as an error, but
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* some seem not to. Make an explicit test to be sure we catch it.
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*/
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if (s == NULL)
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elog(ERROR, "NULL pointer");
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if (*s == 0)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
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errmsg("invalid input syntax for integer: \"%s\"",
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s)));
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errno = 0;
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l = strtol(s, &badp, 10);
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/* We made no progress parsing the string, so bail out */
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if (s == badp)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
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errmsg("invalid input syntax for integer: \"%s\"",
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s)));
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/*
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* Skip any trailing whitespace; if anything but whitespace
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* remains before the terminating character, bail out
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*/
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while (*badp != c && isspace(*badp))
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badp++;
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if (*badp != c)
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ereport(ERROR,
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(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
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errmsg("invalid input syntax for integer: \"%s\"",
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s)));
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switch (size)
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{
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case sizeof(int32):
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if (errno == ERANGE
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#if defined(HAVE_LONG_INT_64)
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/* won't get ERANGE on these with 64-bit longs... */
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|| l < INT_MIN || l > INT_MAX
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#endif
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)
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ereport(ERROR,
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(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
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errmsg("value \"%s\" is out of range for type integer", s)));
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break;
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case sizeof(int16):
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if (errno == ERANGE || l < SHRT_MIN || l > SHRT_MAX)
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ereport(ERROR,
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(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
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errmsg("value \"%s\" is out of range for type shortint", s)));
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break;
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case sizeof(int8):
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if (errno == ERANGE || l < SCHAR_MIN || l > SCHAR_MAX)
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ereport(ERROR,
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(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
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errmsg("value \"%s\" is out of range for 8-bit integer", s)));
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break;
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default:
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elog(ERROR, "unsupported result size: %d", size);
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}
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return (int32) l;
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}
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/*
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* pg_itoa - converts a short int to its string represention
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*
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* Note:
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* previously based on ~ingres/source/gutil/atoi.c
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* now uses vendor's sprintf conversion
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*/
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void
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pg_itoa(int16 i, char *a)
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{
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sprintf(a, "%hd", (short) i);
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}
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/*
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* pg_ltoa - converts a long int to its string represention
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*
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* Note:
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* previously based on ~ingres/source/gutil/atoi.c
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* now uses vendor's sprintf conversion
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*/
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void
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pg_ltoa(int32 l, char *a)
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{
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sprintf(a, "%d", l);
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}
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