1 files changed, 45 insertions, 0 deletions

diff --git a/libbb/replace.c b/libbb/replace.c
new file mode 100644
index 000000000..8711f957d
--- /dev/null
+++ b/libbb/replace.c
@@ -0,0 +1,45 @@
+/* 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;
+
+        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;
+}