zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/tools/perf/util/quote.c b/ap/os/linux/linux-3.4.x/tools/perf/util/quote.c
new file mode 100644
index 0000000..01f0324
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/tools/perf/util/quote.c
@@ -0,0 +1,54 @@
+#include "cache.h"
+#include "quote.h"
+
+/* Help to copy the thing properly quoted for the shell safety.
+ * any single quote is replaced with '\'', any exclamation point
+ * is replaced with '\!', and the whole thing is enclosed in a
+ *
+ * E.g.
+ * original sq_quote result
+ * name ==> name ==> 'name'
+ * a b ==> a b ==> 'a b'
+ * a'b ==> a'\''b ==> 'a'\''b'
+ * a!b ==> a'\!'b ==> 'a'\!'b'
+ */
+static inline int need_bs_quote(char c)
+{
+ return (c == '\'' || c == '!');
+}
+
+static void sq_quote_buf(struct strbuf *dst, const char *src)
+{
+ char *to_free = NULL;
+
+ if (dst->buf == src)
+ to_free = strbuf_detach(dst, NULL);
+
+ strbuf_addch(dst, '\'');
+ while (*src) {
+ size_t len = strcspn(src, "'!");
+ strbuf_add(dst, src, len);
+ src += len;
+ while (need_bs_quote(*src)) {
+ strbuf_addstr(dst, "'\\");
+ strbuf_addch(dst, *src++);
+ strbuf_addch(dst, '\'');
+ }
+ }
+ strbuf_addch(dst, '\'');
+ free(to_free);
+}
+
+void sq_quote_argv(struct strbuf *dst, const char** argv, size_t maxlen)
+{
+ int i;
+
+ /* Copy into destination buffer. */
+ strbuf_grow(dst, 255);
+ for (i = 0; argv[i]; ++i) {
+ strbuf_addch(dst, ' ');
+ sq_quote_buf(dst, argv[i]);
+ if (maxlen && dst->len > maxlen)
+ die("Too many or long arguments");
+ }
+}