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146 lines
3.8 KiB
C
146 lines
3.8 KiB
C
/* A small test for strtol. Assumes twos complement */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <errno.h>
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#define outfile stderr
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#define ERROR 0
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#define OK 1
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static unsigned int Failures = 0;
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static void IncStr (char* Buf)
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/* Increment a number represented as a string by one. The string MUST not
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* start with a '9', we cannot handle overflow in this case.
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*/
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{
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int Len = strlen (Buf);
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while (--Len >= 0) {
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switch (Buf[Len]) {
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case '9':
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Buf[Len] = '0';
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break;
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default:
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++(Buf[Len]);
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return;
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}
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}
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}
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static void CheckStrToL (const char* Str, int Base, long Val, unsigned char Ok)
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{
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char* EndPtr;
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long Res = strtol (Str, &EndPtr, Base);
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if (Ok) {
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if (Res != Val) {
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fprintf (outfile,
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"strtol error in \"%s\":\n"
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" result = %ld, should be %ld, chars = %d\n",
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Str, Res, Val, EndPtr - Str);
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++Failures;
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}
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} else {
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if (errno != ERANGE) {
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fprintf (outfile,
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"strtol error in \"%s\":\n"
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" should not convert, but errno = %d\n",
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Str, errno);
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++Failures;
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}
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if (Res != Val) {
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fprintf (outfile,
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"strtol error in \"%s\":\n"
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" result = %ld, should be %ld, chars = %d\n",
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Str, Res, Val, EndPtr - Str);
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++Failures;
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}
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}
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}
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int main (void)
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{
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char Buf[80];
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/* Prefixed allowed if base = 0 */
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CheckStrToL ("\t 0x10G ", 0, 16L, OK);
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CheckStrToL ("\t 0X10G ", 0, 16L, OK);
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CheckStrToL (" \t0377\t", 0, 255L, OK);
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CheckStrToL (" 377", 0, 377L, OK);
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CheckStrToL ("\t -0x10G ", 0, -16L, OK);
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CheckStrToL ("\t -0X10G ", 0, -16L, OK);
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CheckStrToL (" \t-0377\t", 0, -255L, OK);
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CheckStrToL (" -377", 0, -377L, OK);
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/* No prefixes if base = 10 */
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CheckStrToL ("\t 1234 ", 10, 1234L, OK);
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CheckStrToL ("\t -1234 ", 10, -1234L, OK);
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CheckStrToL ("\t -0x10G ", 10, 0L, OK);
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CheckStrToL ("\t -0X10G ", 10, 0L, OK);
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CheckStrToL (" \t-0377\t", 10, -377L, OK);
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CheckStrToL (" 0377", 10, 377L, OK);
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/* 0x prefix is allowed if base = 16 */
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CheckStrToL ("\t 0x1234 ", 16, 0x1234L, OK);
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CheckStrToL ("\t -0x1234 ", 16, -0x1234L, OK);
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CheckStrToL ("\t -010G ", 16, -16L, OK);
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CheckStrToL ("\t 10G ", 16, 16L, OK);
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/* Check LONG_MIN and LONG_MAX */
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sprintf (Buf, "%ld", LONG_MIN);
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CheckStrToL (Buf, 0, LONG_MIN, OK);
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sprintf (Buf, "%ld", LONG_MAX);
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CheckStrToL (Buf, 0, LONG_MAX, OK);
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/* Check value one smaller */
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sprintf (Buf+1, "%ld", LONG_MIN);
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Buf[1] = '0'; /* Overwrite '-' */
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IncStr (Buf+1);
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if (Buf[1] == '0') {
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Buf[1] = '-';
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Buf[0] = ' ';
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} else {
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Buf[0] = '-';
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}
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CheckStrToL (Buf, 0, LONG_MIN, ERROR);
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/* Check value one larger */
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sprintf (Buf+1, "%ld", LONG_MAX);
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Buf[0] = '0';
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IncStr (Buf);
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if (Buf[0] == '0') {
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Buf[0] = ' ';
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}
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CheckStrToL (Buf, 0, LONG_MAX, ERROR);
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/* Check numbers that are much too large or small */
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CheckStrToL ("-999999999999999999999999999999999999999999999999999999999", 0, LONG_MIN, ERROR);
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CheckStrToL ("+999999999999999999999999999999999999999999999999999999999", 0, LONG_MAX, ERROR);
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CheckStrToL (" 999999999999999999999999999999999999999999999999999999999", 0, LONG_MAX, ERROR);
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/* Check a few other bases */
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CheckStrToL ("aBcD", 36, 481261L, OK);
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CheckStrToL ("zyaB", 35, 0L, ERROR);
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CheckStrToL ("zyaB", 36, 1677395L, ERROR);
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fprintf (outfile, "Failures: %u\n", Failures);
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return (Failures != 0);
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}
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