#include <string.h>
#include "fhp/fhp.h"

#define UNUSED(a) ((void) (a))

#define CASE_ALNUM_CHARS \
  case '0': \
  case '1': \
  case '2': \
  case '3': \
  case '4': \
  case '5': \
  case '6': \
  case '7': \
  case '8': \
  case '9': \
  case 'a': \
  case 'b': \
  case 'c': \
  case 'd': \
  case 'e': \
  case 'f': \
  case 'g': \
  case 'h': \
  case 'i': \
  case 'j': \
  case 'k': \
  case 'l': \
  case 'm': \
  case 'n': \
  case 'o': \
  case 'p': \
  case 'q': \
  case 'r': \
  case 's': \
  case 't': \
  case 'u': \
  case 'v': \
  case 'w': \
  case 'x': \
  case 'y': \
  case 'z': \
  case 'A': \
  case 'B': \
  case 'C': \
  case 'D': \
  case 'E': \
  case 'F': \
  case 'G': \
  case 'H': \
  case 'I': \
  case 'J': \
  case 'K': \
  case 'L': \
  case 'M': \
  case 'N': \
  case 'O': \
  case 'P': \
  case 'Q': \
  case 'R': \
  case 'S': \
  case 'T': \
  case 'U': \
  case 'V': \
  case 'W': \
  case 'X': \
  case 'Y': \
  case 'Z':

#define CASE_DIGIT_CHARS \
  case '0': \
  case '1': \
  case '2': \
  case '3': \
  case '4': \
  case '5': \
  case '6': \
  case '7': \
  case '8': \
  case '9':

#define CASE_HEX_LC_ALPHA_CHARS \
  case 'a': \
  case 'b': \
  case 'c': \
  case 'd': \
  case 'e': \
  case 'f':

#define CASE_HEX_UC_ALPHA_CHARS \
  case 'A': \
  case 'B': \
  case 'C': \
  case 'D': \
  case 'E': \
  case 'F':

#define CASE_HEX_ALPHA_CHARS \
  CASE_HEX_LC_ALPHA_CHARS \
  CASE_HEX_UC_ALPHA_CHARS \

//
// rfc7230, Appendix B
// https://tools.ietf.org/html/rfc7230
//
//   tchar = "!" / "#" / "$" / "%" / "&" / "'" / "*" / "+" / "-" / "." /
//           "^" / "_" / "`" / "|" / "~" / DIGIT / ALPHA
//   token = 1*tchar
//
#define CASE_TOKEN_CHARS \
  CASE_ALNUM_CHARS \
  case '!': \
  case '#': \
  case '$': \
  case '%': \
  case '&': \
  case '\'': \
  case '*': \
  case '+': \
  case '-': \
  case '.': \
  case '^': \
  case '_': \
  case '|': \
  case '~': \

#define CASE_URL_CHARS \
  CASE_ALNUM_CHARS \
  case '!': \
  case '"': \
  case '#': \
  case '$': \
  case '&': \
  case '\'': \
  case '(': \
  case ')': \
  case '*': \
  case '+': \
  case ',': \
  case '-': \
  case '.': \
  case '/': \
  case ':': \
  case ';': \
  case '<': \
  case '=': \
  case '>': \
  case '?': \
  case '@': \
  case '[': \
  case '\\': \
  case ']': \
  case '^': \
  case '_': \
  case '`': \
  case '{': \
  case '|': \
  case '}': \
  case '~':

#define CASE_VISUAL_CHARS \
  CASE_URL_CHARS \
  case '%':

#define CASE_VERSION_CHARS \
  CASE_TOKEN_CHARS \
  case '/':

#define CASE_TE_CHARS \
  CASE_ALNUM_CHARS \
  case '-':

//
// rfc7230, Appendix B
// https://tools.ietf.org/html/rfc7230
//
//   OWS = *( SP / HTAB )
//
#define CASE_OWS_CHARS \
  case ' ': \
  case '\t':

//
// strings
//

typedef enum {
  FHP_STR_GET,
  FHP_STR_POST,
  FHP_STR_HEAD,
  FHP_STR_PUT,
  FHP_STR_DELETE,
  FHP_STR_OPTIONS,
  FHP_STR_HTTP_10,
  FHP_STR_HTTP_11,
  FHP_STR_CONTENT_LENGTH,
  FHP_STR_CONTENT_TYPE,
  FHP_STR_TRANSFER_ENCODING,
  FHP_STR_GZIP,
  FHP_STR_X_GZIP,
  FHP_STR_DEFLATE,
  FHP_STR_X_DEFLATE,
  FHP_STR_COMPRESS,
  FHP_STR_X_COMPRESS,
  FHP_STR_CHUNKED,
  FHP_STR_APPLICATION_X_WWW_FORM_URLENCODED,
  FHP_STR_MULTIPART_FORM_DATA,
  FHP_STR_LAST
} fhp_str_t;

fhp_err_t
fhp_header_value_parser_init(fhp_ctx_t * const);

fhp_err_t
fhp_header_value_parser_push(fhp_ctx_t * const, uint8_t * const, size_t);

fhp_err_t
fhp_header_value_parser_done(fhp_ctx_t * const);