/* vi: set sw=4 ts=4: */ /* * Utility routines. * * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> * * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ //kbuild:lib-y += replace.o #include "libbb.h" unsigned FAST_FUNC count_strstr(const char *str, const char *sub) { size_t sub_len = strlen(sub); unsigned count = 0; /* If sub is empty, avoid an infinite loop */ if (sub_len == 0) return strlen(str) + 1; while ((str = strstr(str, sub)) != NULL) { count++; str += sub_len; } return count; } char* FAST_FUNC xmalloc_substitute_string(const char *src, int count, const char *sub, const char *repl) { char *buf, *dst, *end; size_t sub_len = strlen(sub); size_t repl_len = strlen(repl); //dbg_msg("subst(s:'%s',count:%d,sub:'%s',repl:'%s'", src, count, sub, repl); buf = dst = xmalloc(strlen(src) + count * ((int)repl_len - (int)sub_len) + 1); /* we replace each sub with repl */ while ((end = strstr(src, sub)) != NULL) { dst = mempcpy(dst, src, end - src); dst = mempcpy(dst, repl, repl_len); /*src = end + 1; - GNU findutils 4.5.10 doesn't do this... */ src = end + sub_len; /* but this. Try "xargs -Iaa echo aaa" */ } strcpy(dst, src); //dbg_msg("subst9:'%s'", buf); return buf; }