First commit

url.h

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+#ifndef URL_INCLUDED
+#define URL_INCLUDED
+// This is free and unencumbered software released into the public domain.
+//
+// Anyone is free to copy, modify, publish, use, compile, sell, or
+// distribute this software, either in source code form or as a compiled
+// binary, for any purpose, commercial or non-commercial, and by any
+// means.
+//
+// In jurisdictions that recognize copyright laws, the author or authors
+// of this software dedicate any and all copyright interest in the
+// software to the public domain. We make this dedication for the benefit
+// of the public at large and to the detriment of our heirs and
+// successors. We intend this dedication to be an overt act of
+// relinquishment in perpetuity of all present and future rights to this
+// software under copyright law.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+// IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+// OTHER DEALINGS IN THE SOFTWARE.
+//
+// For more information, please refer to <https://unlicense.org>
+
+#define URL_STATIC_ASSERT _Static_assert
+
+typedef unsigned char  URL_u8;
+typedef unsigned short URL_u16;
+typedef unsigned int   URL_u32;
+typedef unsigned int   URL_b32;
+
+URL_STATIC_ASSERT(sizeof(URL_u8)  == 1, "");
+URL_STATIC_ASSERT(sizeof(URL_u16) == 2, "");
+URL_STATIC_ASSERT(sizeof(URL_u32) == 4, "");
+URL_STATIC_ASSERT(sizeof(URL_b32) == 4, "");
+
+typedef struct {
+    char *ptr;
+    int   len;
+} URL_String;
+
+typedef enum {
+    URL_HOST_EMPTY,
+    URL_HOST_IPV4,
+    URL_HOST_IPV6,
+    URL_HOST_NAME,
+} URL_HostType;
+
+typedef struct {
+    URL_u32 data;
+} URL_IPv4;
+
+typedef struct {
+    URL_u16 data[8];
+} URL_IPv6;
+
+URL_STATIC_ASSERT(sizeof(URL_IPv4) == 4, "");
+URL_STATIC_ASSERT(sizeof(URL_IPv6) == 16, "");
+
+typedef struct {
+
+    // May be empty
+    URL_String scheme;
+
+    // Both may be empty
+    URL_String username;
+    URL_String password;
+
+    // The raw host string is stored in host_text.
+    // If the host is an IPv4 or IPv6, its parsed
+    // value is also stored in host_ipv4 or host_ipv6
+    // (host byte order).
+    // Note that the host may be empty, in which
+    // case host_type=URL_HOST_EMPTY.
+    URL_HostType host_type;
+    URL_String   host_text;
+    union {
+        URL_IPv4 host_ipv4;
+        URL_IPv6 host_ipv6;
+    };
+
+    // If no port was specified, no_port is set
+    // to 1 and port to 0.
+    URL_b32 no_port;
+    URL_u16 port;
+
+    URL_String path;
+
+    // May be empty
+    URL_String query;
+
+    // May be empty
+    URL_String fragment;
+
+} URL;
+
+int url_parse(char *src, int len, int *pcur, URL *out);
+int url_parse_ipv4(char *src, int len, int *pcur, URL_IPv4 *out);
+int url_parse_ipv6(char *src, int len, int *pcur, URL_IPv6 *out);
+
+#endif // URL_INCLUDED