1 files changed, 46 insertions, 0 deletions

diff --git a/tools/perf/util/string.c b/tools/perf/util/string.c
index aaa08ee8c717..d8bfd0c4d2cb 100644
--- a/tools/perf/util/string.c
+++ b/tools/perf/util/string.c
@@ -396,3 +396,49 @@ out_err_overflow:
         free(expr);
         return NULL;
 }
+
+/* Like strpbrk(), but not break if it is right after a backslash (escaped) */
+char *strpbrk_esc(char *str, const char *stopset)
+{
+        char *ptr;
+
+        do {
+                ptr = strpbrk(str, stopset);
+                if (ptr == str ||
+                    (ptr == str + 1 && *(ptr - 1) != '\\'))
+                        break;
+                str = ptr + 1;
+        } while (ptr && *(ptr - 1) == '\\' && *(ptr - 2) != '\\');
+
+        return ptr;
+}
+
+/* Like strdup, but do not copy a single backslash */
+char *strdup_esc(const char *str)
+{
+        char *s, *d, *p, *ret = strdup(str);
+
+        if (!ret)
+                return NULL;
+
+        d = strchr(ret, '\\');
+        if (!d)
+                return ret;
+
+        s = d + 1;
+        do {
+                if (*s == '\0') {
+                        *d = '\0';
+                        break;
+                }
+                p = strchr(s + 1, '\\');
+                if (p) {
+                        memmove(d, s, p - s);
+                        d += p - s;
+                        s = p + 1;
+                } else
+                        memmove(d, s, strlen(s) + 1);
+        } while (p);
+
+        return ret;
+}