initial commitHEADmaster

1 files changed, 157 insertions, 0 deletions

diff --git a/code/spyglass/ext/spyglass_parser/parser.rl b/code/spyglass/ext/spyglass_parser/parser.rl
new file mode 100644
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+++ b/code/spyglass/ext/spyglass_parser/parser.rl
@@ -0,0 +1,157 @@
+/**
+ * Copyright (c) 2005 Zed A. Shaw
+ * You can redistribute it and/or modify it under the same terms as Ruby.
+ */
+#include "parser.h"
+#include <stdio.h>
+#include <assert.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+
+#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 http_parser;
+
+  action mark {MARK(mark, fpc); }
+
+
+  action start_field { MARK(field_start, fpc); }
+  action write_field { 
+    parser->field_len = LEN(field_start, fpc);
+  }
+
+  action start_value { MARK(mark, fpc); }
+  action write_value { 
+    if (parser->http_field != NULL) {
+      parser->http_field(parser->data, PTR_TO(field_start), parser->field_len, PTR_TO(mark), LEN(mark, fpc));
+    }
+  }
+  action request_method { 
+    if (parser->request_method != NULL) {
+      parser->request_method(parser->data, PTR_TO(mark), LEN(mark, fpc));
+    }
+  }
+  action request_uri {
+    if (parser->request_uri != NULL) {
+      parser->request_uri(parser->data, PTR_TO(mark), LEN(mark, fpc));
+    }
+  }
+  action fragment { 
+    if (parser->fragment != NULL) {
+      parser->fragment(parser->data, PTR_TO(mark), LEN(mark, fpc));
+    }
+  }
+
+  action start_query {MARK(query_start, fpc); }
+  action query_string { 
+    if (parser->query_string != NULL) {
+      parser->query_string(parser->data, PTR_TO(query_start), LEN(query_start, fpc));
+    }
+  }
+
+  action http_version {	
+    if (parser->http_version != NULL) {
+      parser->http_version(parser->data, PTR_TO(mark), LEN(mark, fpc));
+    }
+  }
+
+  action request_path {
+    if (parser->request_path != NULL) {
+      parser->request_path(parser->data, PTR_TO(mark), LEN(mark,fpc));
+    }
+  }
+
+  action done { 
+    parser->body_start = fpc - buffer + 1; 
+    if (parser->header_done != NULL) {
+      parser->header_done(parser->data, fpc + 1, pe - fpc - 1);
+    }
+    fbreak;
+  }
+
+  include http_parser_common "common.rl";
+
+}%%
+
+/** Data **/
+%% write data;
+
+int spyglass_http_parser_init(http_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;    
+
+  return(1);
+}
+
+
+/** exec **/
+size_t spyglass_http_parser_execute(http_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;
+
+  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");
+
+  if(parser->body_start) {
+    /* final \r\n combo encountered so stop right here */
+    parser->nread++;
+  }
+
+  return(parser->nread);
+}
+
+int spyglass_http_parser_finish(http_parser *parser)
+{
+  int cs = parser->cs;
+
+
+  parser->cs = cs;
+
+  if (spyglass_http_parser_has_error(parser) ) {
+    return -1;
+  } else if (spyglass_http_parser_is_finished(parser) ) {
+    return 1;
+  } else {
+    return 0;
+  }
+}
+
+int spyglass_http_parser_has_error(http_parser *parser) {
+  return parser->cs == http_parser_error;
+}
+
+int spyglass_http_parser_is_finished(http_parser *parser) {
+  return parser->cs == http_parser_first_final;
+}