[3621] | 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) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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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 | //kbuild:lib-y += replace.o
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| 11 |
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| 12 | #include "libbb.h"
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| 13 |
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| 14 | unsigned FAST_FUNC count_strstr(const char *str, const char *sub)
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| 15 | {
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| 16 | size_t sub_len = strlen(sub);
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| 17 | unsigned count = 0;
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| 18 |
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| 19 | while ((str = strstr(str, sub)) != NULL) {
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| 20 | count++;
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| 21 | str += sub_len;
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| 22 | }
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| 23 | return count;
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| 24 | }
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| 25 |
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| 26 | char* FAST_FUNC xmalloc_substitute_string(const char *src, int count, const char *sub, const char *repl)
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| 27 | {
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| 28 | char *buf, *dst, *end;
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| 29 | size_t sub_len = strlen(sub);
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| 30 | size_t repl_len = strlen(repl);
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| 31 |
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| 32 | //dbg_msg("subst(s:'%s',count:%d,sub:'%s',repl:'%s'", src, count, sub, repl);
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| 33 |
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| 34 | buf = dst = xmalloc(strlen(src) + count * ((int)repl_len - (int)sub_len) + 1);
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| 35 | /* we replace each sub with repl */
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| 36 | while ((end = strstr(src, sub)) != NULL) {
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| 37 | dst = mempcpy(dst, src, end - src);
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| 38 | dst = mempcpy(dst, repl, repl_len);
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| 39 | /*src = end + 1; - GNU findutils 4.5.10 doesn't do this... */
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| 40 | src = end + sub_len; /* but this. Try "xargs -Iaa echo aaa" */
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| 41 | }
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| 42 | strcpy(dst, src);
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| 43 | //dbg_msg("subst9:'%s'", buf);
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| 44 | return buf;
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| 45 | }
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