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#ifndef FHP_H_
#define FHP_H
#include <stdint.h> // for uint8_t
#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,
FHP_ERR_BAD_STATE,
FHP_ERR_INVALID_CHAR,
FHP_ERR_INVALID_CHAR_IN_METHOD,
FHP_ERR_INVALID_CHAR_IN_URL,
FHP_ERR_INVALID_CHAR_IN_URL_PERCENT,
FHP_ERR_INVALID_CHAR_IN_VERSION,
FHP_ERR_INVALID_CHAR_AFTER_CR,
FHP_ERR_INVALID_CHAR_IN_HEADER_NAME,
FHP_ERR_INVALID_ERROR,
FHP_ERR_BUFFER_TOO_SMALL,
FHP_ERR_LAST
} fhp_err_t;
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,
FHP_TOKEN_VERSION_START,
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,
FHP_TOKEN_HEADER_VALUE_START,
FHP_TOKEN_HEADER_VALUE_FRAGMENT,
FHP_TOKEN_HEADER_VALUE_END,
FHP_TOKEN_LAST
} fhp_token_t;
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)(
fhp_t * const,
fhp_token_t,
uint8_t * const,
size_t
);
typedef enum {
FHP_STATE_INIT,
FHP_STATE_ERROR,
FHP_STATE_METHOD,
FHP_STATE_METHOD_END,
FHP_STATE_URL,
FHP_STATE_URL_PERCENT,
FHP_STATE_URL_PERCENT_LAST,
FHP_STATE_URL_END,
FHP_STATE_VERSION,
FHP_STATE_VERSION_END,
FHP_STATE_VERSION_END_CR,
FHP_STATE_STATUS_END,
FHP_STATE_STATUS_END_CR,
FHP_STATE_HEADER_NAME,
FHP_STATE_HEADER_NAME_END,
FHP_STATE_HEADER_NAME_END_CR,
FHP_STATE_HEADER_VALUE,
FHP_STATE_HEADER_VALUE_END_CR,
FHP_STATE_HEADER_VALUE_END,
FHP_STATE_HEADERS_END,
FHP_STATE_HEADERS_END_CR,
FHP_STATE_LAST
} fhp_state_t;
#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;
// last error
fhp_err_t err;
// number of bytes read
uint64_t ofs;
// fragment data buffer
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;
// hash of last header name
uint32_t header_name_hash;
// state for url hex decoder
uint32_t hex;
};
fhp_err_t
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_get_user_data(fhp_t * const);
#endif /* FHP_H */
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