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	strverscmp.c - noice - small file browser (mirror / fork from 2f30.org)
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	---
	strverscmp.c (979B)
	---
	1 /* See LICENSE file for copyright and license details. */
	2 #include <ctype.h>
	3 #include <stdlib.h>
	4 #include <string.h>
	5
	6 #include "util.h"
	7
	8 int
	9 strverscmp(const char str1, const char str2)
	10 {
	11 size_t len1 = strlen(str1);
	12 size_t len2 = strlen(str2);
	13 size_t i1 = 0;
	14 size_t i2 = 0;
	15 for (; i1 < len1 && i2 < len2; i1++, i2++) {
	16 unsigned char c1 = str1[i1];
	17 unsigned char c2 = str2[i2];
	18 if (isdigit(c1) && isdigit(c2)) {
	19 unsigned long long int num1;
	20 unsigned long long int num2;
	21 char *end1;
	22 char *end2;
	23 num1 = strtoull(str1 + i1, &end1, 10);
	24 num2 = strtoull(str2 + i2, &end2, 10);
	25 DPRINTF_LLU(num1);
	26 DPRINTF_LLU(num2);
	27 if (num1 < num2)
	28 return -1;
	29 if (num1 > num2)
	30 return 1;
	31 i1 = end1 - str1 - 1;
	32 i2 = end2 - str2 - 1;
	33 if (i1 < i2)
	34 return -1;
	35 if (i1 > i2)
	36 return 1;
	37 } else {
	38 if (c1 < c2)
	39 return -1;
	40 if (c1 > c2)
	41 return 1;
	42 }
	43 }
	44 if (len1 < len2)
	45 return -1;
	46 if (len1 > len2)
	47 return 1;
	48 return 0;
	49 }