Last change
on this file since 3853 was 3621, checked in by Bruno Cornec, 8 years ago |
New 3?3 banch for incorporation of latest busybox 1.25. Changing minor version to handle potential incompatibilities.
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Property svn:eol-style
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native
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File size:
1.3 KB
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[2725] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Utility routines.
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| 4 | *
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| 5 | * Copyright (C) 2008 Bernhard Reutner-Fischer
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| 6 | *
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| 7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 8 | */
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| 9 |
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| 10 | #include "libbb.h"
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| 11 |
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| 12 | /*
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| 13 | * The strrstr() function finds the last occurrence of the substring needle
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| 14 | * in the string haystack. The terminating nul characters are not compared.
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| 15 | */
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| 16 | char* FAST_FUNC strrstr(const char *haystack, const char *needle)
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| 17 | {
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| 18 | char *r = NULL;
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| 19 |
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| 20 | if (!needle[0])
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| 21 | return (char*)haystack + strlen(haystack);
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| 22 | while (1) {
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| 23 | char *p = strstr(haystack, needle);
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| 24 | if (!p)
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| 25 | return r;
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| 26 | r = p;
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| 27 | haystack = p + 1;
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| 28 | }
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| 29 | }
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| 30 |
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[3621] | 31 | #if ENABLE_UNIT_TEST
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| 32 |
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| 33 | BBUNIT_DEFINE_TEST(strrstr)
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[2725] | 34 | {
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| 35 | static const struct {
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| 36 | const char *h, *n;
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| 37 | int pos;
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| 38 | } test_array[] = {
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| 39 | /* 0123456789 */
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| 40 | { "baaabaaab", "aaa", 5 },
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| 41 | { "baaabaaaab", "aaa", 6 },
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| 42 | { "baaabaab", "aaa", 1 },
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| 43 | { "aaa", "aaa", 0 },
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| 44 | { "aaa", "a", 2 },
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| 45 | { "aaa", "bbb", -1 },
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| 46 | { "a", "aaa", -1 },
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| 47 | { "aaa", "", 3 },
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| 48 | { "", "aaa", -1 },
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| 49 | { "", "", 0 },
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| 50 | };
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| 51 |
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| 52 | int i;
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| 53 |
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| 54 | i = 0;
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| 55 | while (i < sizeof(test_array) / sizeof(test_array[0])) {
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| 56 | const char *r = strrstr(test_array[i].h, test_array[i].n);
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| 57 | if (r == NULL)
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| 58 | r = test_array[i].h - 1;
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[3621] | 59 | BBUNIT_ASSERT_EQ(r, test_array[i].h + test_array[i].pos);
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[2725] | 60 | i++;
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| 61 | }
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| 62 |
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[3621] | 63 | BBUNIT_ENDTEST;
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[2725] | 64 | }
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[3621] | 65 |
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| 66 | #endif /* ENABLE_UNIT_TEST */
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