Copyright (c) 2005 Zed A. Shaw
You can redistribute it and/or modify it under the same terms as Ruby.

include “http11_parser.h” include <stdio.h> include <assert.h> include <stdlib.h> include <ctype.h> include <string.h>

 capitalizes all lower-case ASCII characters,
 converts dashes to underscores.
/

static void snake_upcase_char(char *c) {

if (*c >= 'a' && *c <= 'z')
   c &= ~0x20;
else if (*c == '-')
   c = '_';

}

define LEN(AT, FPC) (FPC - buffer - parser->AT) define MARK(M,FPC) (parser->M = (FPC) - buffer) define PTR_TO(F) (buffer + parser->F)

/** Machine

%%{

machine puma_parser;

action mark { MARK(mark, fpc); }

action start_field { MARK(field_start, fpc); }
action snake_upcase_field { snake_upcase_char((char *)fpc); }
action write_field { 
  parser->field_len = LEN(field_start, fpc);
}

action start_value { MARK(mark, fpc); }
action write_value {
  parser->http_field(parser, PTR_TO(field_start), parser->field_len, PTR_TO(mark), LEN(mark, fpc));
}
action request_method { 
  parser->request_method(parser, PTR_TO(mark), LEN(mark, fpc));
}
action request_uri { 
  parser->request_uri(parser, PTR_TO(mark), LEN(mark, fpc));
}
action fragment {
  parser->fragment(parser, PTR_TO(mark), LEN(mark, fpc));
}

action start_query { MARK(query_start, fpc); }
action query_string { 
  parser->query_string(parser, PTR_TO(query_start), LEN(query_start, fpc));
}

action http_version { 
  parser->http_version(parser, PTR_TO(mark), LEN(mark, fpc));
}

action request_path {
  parser->request_path(parser, PTR_TO(mark), LEN(mark,fpc));
}

action done { 
  parser->body_start = fpc - buffer + 1; 
  parser->header_done(parser, fpc + 1, pe - fpc - 1);
  fbreak;
}

include puma_parser_common "http11_parser_common.rl";

}%%

/** Data **/ %% write data;

int puma_parser_init(puma_parser *parser) {

int cs = 0;
%% write init;
parser->cs = cs;
parser->body_start = 0;
parser->content_len = 0;
parser->mark = 0;
parser->nread = 0;
parser->field_len = 0;
parser->field_start = 0;
parser->request = Qnil;
parser->body = Qnil;

return 1;

}

/** exec **/ size_t puma_parser_execute(puma_parser *parser, const char *buffer, size_t len, size_t off) {

const char *p, *pe;
int cs = parser->cs;

assert(off <= len && "offset past end of buffer");

p = buffer+off;
pe = buffer+len;

/* assert(*pe == '\0' && "pointer does not end on NUL"); */
assert(pe - p == len - off && "pointers aren't same distance");

%% write exec;

if (!puma_parser_has_error(parser))
  parser->cs = cs;
parser->nread += p - (buffer + off);

assert(p <= pe && "buffer overflow after parsing execute");
assert(parser->nread <= len && "nread longer than length");
assert(parser->body_start <= len && "body starts after buffer end");
assert(parser->mark < len && "mark is after buffer end");
assert(parser->field_len <= len && "field has length longer than whole buffer");
assert(parser->field_start < len && "field starts after buffer end");

return(parser->nread);

}

int puma_parser_finish(puma_parser *parser) {

if (puma_parser_has_error(parser) ) {
  return -1;
} else if (puma_parser_is_finished(parser) ) {
  return 1;
} else {
  return 0;
}

}

int puma_parser_has_error(puma_parser *parser) {

return parser->cs == puma_parser_error;

}

int puma_parser_is_finished(puma_parser *parser) {

return parser->cs >= puma_parser_first_final;

}