From 19653e153b70e72e9a75e74655c8e56025ce4d61 Mon Sep 17 00:00:00 2001
From: Paul Duncan <pabs@pablotron.org>
Date: Sat, 27 Aug 2016 14:39:23 -0400
Subject: hash http method and version and add tokens for fast parsing

---
 include/fhp/fhp.h | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 66 insertions(+), 5 deletions(-)

(limited to 'include')

diff --git a/include/fhp/fhp.h b/include/fhp/fhp.h
index 563d2ad..2e1dc95 100644
--- a/include/fhp/fhp.h
+++ b/include/fhp/fhp.h
@@ -5,6 +5,21 @@
 #include <stddef.h> // for size_t
 #include <stdbool.h> // for size_t
 
+//
+// hash functions (djb2)
+// (see http://aras-p.info/blog/2016/08/02/Hash-Functions-all-the-way-down/)
+//
+
+uint32_t fhp_hash_init(void);
+uint32_t fhp_hash_push(uint32_t, uint8_t * const, size_t);
+uint32_t fhp_hash_string(char * const);
+uint32_t fhp_lc_hash_push(uint32_t, uint8_t * const, size_t);
+uint32_t fhp_lc_hash_string(char * const);
+
+//
+// error functions
+//
+
 typedef enum {
   FHP_OK,
   FHP_ERR_CB,
@@ -24,11 +39,23 @@ typedef enum {
 fhp_err_t
 fhp_strerror(fhp_err_t, char * const, size_t);
 
+//
+// token functions
+//
+
 typedef enum {
   FHP_TOKEN_METHOD_START,
   FHP_TOKEN_METHOD_FRAGMENT,
   FHP_TOKEN_METHOD_END,
 
+  FHP_TOKEN_METHOD_GET,
+  FHP_TOKEN_METHOD_POST,
+  FHP_TOKEN_METHOD_HEAD,
+  FHP_TOKEN_METHOD_PUT,
+  FHP_TOKEN_METHOD_DELETE,
+  FHP_TOKEN_METHOD_OPTIONS,
+  FHP_TOKEN_METHOD_OTHER,
+
   FHP_TOKEN_URL_START,
   FHP_TOKEN_URL_FRAGMENT,
   FHP_TOKEN_URL_END,
@@ -37,6 +64,10 @@ typedef enum {
   FHP_TOKEN_VERSION_FRAGMENT,
   FHP_TOKEN_VERSION_END,
 
+  FHP_TOKEN_VERSION_HTTP_10,
+  FHP_TOKEN_VERSION_HTTP_11,
+  FHP_TOKEN_VERSION_OTHER,
+
   FHP_TOKEN_HEADER_NAME_START,
   FHP_TOKEN_HEADER_NAME_FRAGMENT,
   FHP_TOKEN_HEADER_NAME_END,
@@ -51,6 +82,23 @@ typedef enum {
 fhp_err_t
 fhp_strtoken(fhp_token_t, char * const, size_t);
 
+//
+// env functions
+//
+
+#define FHP_ENV_NUM_HASHES 6
+
+typedef struct {
+  uint32_t hashes[FHP_ENV_NUM_HASHES];
+} fhp_env_t;
+
+void fhp_env_init(fhp_env_t * const env);
+fhp_env_t *fhp_get_default_env(void);
+
+//
+// context functions
+//
+
 typedef struct fhp_t_ fhp_t;
 
 typedef bool (*fhp_cb_t)(
@@ -88,15 +136,18 @@ typedef enum {
 #define FHP_BUF_SIZE 1024
 
 struct fhp_t_ {
+  // env pointer
+  fhp_env_t *env;
+
+  // opaque user data
+  void *user_data;
+
   // current parser state
   fhp_state_t state;
 
   // user callback
   fhp_cb_t cb;
 
-  // opaque user data
-  void *user_data;
-
   // last error
   fhp_err_t err;
 
@@ -107,17 +158,27 @@ struct fhp_t_ {
   uint8_t buf[FHP_BUF_SIZE];
   size_t buf_len;
 
+  // buffer hashing state
+  bool is_hashing;
+  uint32_t buf_hash;
+
+  // cached http method and version
+  fhp_token_t http_method, http_version;
+
   // state for url hex decoder
   uint32_t hex;
 };
 
 fhp_err_t
-fhp_init(fhp_t * const, fhp_cb_t, void * const);
+fhp_init(fhp_t * const, fhp_env_t * const, fhp_cb_t, void * const);
 
 fhp_err_t
 fhp_push(fhp_t * const, uint8_t * const, size_t);
 
+fhp_env_t *
+fhp_get_env(fhp_t * const);
+
 void *
-fhp_user_data(fhp_t * const);
+fhp_get_user_data(fhp_t * const);
 
 #endif /* FHP_H */
-- 
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