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authorDavid Robillard <d@drobilla.net>2020-08-14 15:51:12 +0200
committerDavid Robillard <d@drobilla.net>2020-08-14 19:07:52 +0200
commit3f5ba5908117cf3351702c144a2509f4bf48d75b (patch)
tree3b0434d1ee5a6749ea1d4b5fecc7492b0272bbd0 /src/uri_utils.h
parent45cdfed515dbbcb85c6d54076b6103788d097400 (diff)
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Clean up and separate internal headers
Diffstat (limited to 'src/uri_utils.h')
-rw-r--r--src/uri_utils.h106
1 files changed, 106 insertions, 0 deletions
diff --git a/src/uri_utils.h b/src/uri_utils.h
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+/*
+ Copyright 2011-2020 David Robillard <http://drobilla.net>
+
+ Permission to use, copy, modify, and/or distribute this software for any
+ purpose with or without fee is hereby granted, provided that the above
+ copyright notice and this permission notice appear in all copies.
+
+ THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#ifndef SERD_URI_UTILS_H
+#define SERD_URI_UTILS_H
+
+#include "string_utils.h"
+
+#include <string.h>
+
+static inline bool
+chunk_equals(const SerdChunk* a, const SerdChunk* b)
+{
+ return a->len == b->len
+ && !strncmp((const char*)a->buf, (const char*)b->buf, a->len);
+}
+
+static inline size_t
+uri_path_len(const SerdURI* uri)
+{
+ return uri->path_base.len + uri->path.len;
+}
+
+static inline uint8_t
+uri_path_at(const SerdURI* uri, size_t i)
+{
+ if (i < uri->path_base.len) {
+ return uri->path_base.buf[i];
+ } else {
+ return uri->path.buf[i - uri->path_base.len];
+ }
+}
+
+/**
+ Return the index of the first differing character after the last root slash,
+ or zero if `uri` is not under `root`.
+*/
+static inline size_t
+uri_rooted_index(const SerdURI* uri, const SerdURI* root)
+{
+ if (!root || !root->scheme.len ||
+ !chunk_equals(&root->scheme, &uri->scheme) ||
+ !chunk_equals(&root->authority, &uri->authority)) {
+ return 0;
+ }
+
+ bool differ = false;
+ const size_t path_len = uri_path_len(uri);
+ const size_t root_len = uri_path_len(root);
+ size_t last_root_slash = 0;
+ for (size_t i = 0; i < path_len && i < root_len; ++i) {
+ const uint8_t u = uri_path_at(uri, i);
+ const uint8_t r = uri_path_at(root, i);
+
+ differ = differ || u != r;
+ if (r == '/') {
+ last_root_slash = i;
+ if (differ) {
+ return 0;
+ }
+ }
+ }
+
+ return last_root_slash + 1;
+}
+
+/** Return true iff `uri` shares path components with `root` */
+static inline bool
+uri_is_related(const SerdURI* uri, const SerdURI* root)
+{
+ return uri_rooted_index(uri, root) > 0;
+}
+
+/** Return true iff `uri` is within the base of `root` */
+static inline bool
+uri_is_under(const SerdURI* uri, const SerdURI* root)
+{
+ const size_t index = uri_rooted_index(uri, root);
+ return index > 0 && uri->path.len > index;
+}
+
+static inline bool
+is_uri_scheme_char(const int c)
+{
+ switch (c) {
+ case ':': case '+': case '-': case '.':
+ return true;
+ default:
+ return is_alpha(c) || is_digit(c);
+ }
+}
+
+#endif // SERD_URI_UTILS_H