bstr.[ch], path.[ch]: add string and path handling functions

Add some new string and path handling functions to be used in
following commits.

Use new path handling functions to simplify find_files().

1 files changed, 34 insertions, 2 deletions

diff --git a/bstr.h b/bstr.h
index 459bf70bef..33a47c0abc 100644
--- a/bstr.h
+++ b/bstr.h
@@ -22,18 +22,50 @@
 #include <stdint.h>
 #include <stddef.h>
 #include <string.h>
+#include <stdbool.h>
 
+#include "talloc.h"
+
+/* NOTE: 'len' is size_t, but most string-handling functions below assume
+ * that input size has been sanity checked and len fits in an int.
+ */
 struct bstr {
-    const uint8_t *start;
+    unsigned char *start;
     size_t len;
 };
 
 int bstrcmp(struct bstr str1, struct bstr str2);
 int bstrcasecmp(struct bstr str1, struct bstr str2);
+int bstrchr(struct bstr str, int c);
+struct bstr *bstr_splitlines(void *talloc_ctx, struct bstr str);
+struct bstr bstr_strip(struct bstr str);
+struct bstr bstr_split(struct bstr str, char *sep, struct bstr *rest);
+struct bstr bstr_splice(struct bstr str, int start, int end);
+long long bstrtoll(struct bstr str, struct bstr *rest, int base);
+
+static inline struct bstr bstr_cut(struct bstr str, int n)
+{
+    return (struct bstr){str.start + n, str.len - n};
+}
+
+static inline bool bstr_startswith(struct bstr str, struct bstr prefix)
+{
+    if (str.len < prefix.len)
+        return false;
+    return !memcmp(str.start, prefix.start, prefix.len);
+}
+
+static inline char *bstrdup0(void *talloc_ctx, struct bstr str)
+{
+    // cast is live555 C++ compilation workaround
+    return talloc_strndup(talloc_ctx, (char *)str.start, str.len);
+}
 
 // Create bstr compound literal from null-terminated string
-#define BSTR(s) (struct bstr){(s), (s) ? strlen(s) : 0}
+#define BSTR(s) (struct bstr){(char *)(s), (s) ? strlen(s) : 0}
 // create a pair (not single value!) for "%.*s" printf syntax
 #define BSTR_P(bstr) (int)((bstr).len), (bstr).start
 
+#define WHITESPACE " \f\n\r\t\v"
+
 #endif /* MPLAYER_BSTR_H */