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54 lines
1.2 KiB
54 lines
1.2 KiB
2 years ago
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/*
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* Copyright(C) 1999-2020 National Technology & Engineering Solutions
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* of Sandia, LLC (NTESS). Under the terms of Contract DE-NA0003525 with
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* NTESS, the U.S. Government retains certain rights in this software.
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*
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* See packages/seacas/LICENSE for details
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*/
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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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int count_digits(int value)
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{
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char tmp[32];
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sprintf(tmp, "%d", value);
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return strlen(tmp);
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}
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/* Output a zero-padded sequence of digits from [0..limit). For
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example zpad 10 will output 00, 01, 02, 03, ..., 09 each on a
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single line.
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*/
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int main(int argc, char **argv)
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{
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int start = 0;
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if (argc < 2) {
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fprintf(stderr, "Usage: %s limit [start=0]\n", argv[0]);
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exit(EXIT_FAILURE);
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}
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if (argc == 3) {
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start = strtol(argv[2], NULL, 10);
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}
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{
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int i;
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char format[] = "%.0Xd\n";
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char digits[2];
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int limit = strtol(argv[1], NULL, 10);
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/* Count number of digits needed to represent 'limit' */
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int width = count_digits(limit);
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sprintf(digits, "%d", width);
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/* Create an output format that will zero-pad to that width */
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format[3] = digits[0];
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for (i = start; i < limit; i++) {
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printf(format, i);
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}
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}
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return EXIT_SUCCESS;
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}
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