Remove HTTP_PARSER_DEBUG macro.

Remove the HTTP_PARSER_DEBUG macro for two reasons:

* It changes the size of struct http_parser, resulting in spurious memory
  corruption bugs if part of your application is built with HTTP_PARSER_DEBUG=1
  and other parts with HTTP_PARSER_DEBUG=0.

* It's a debugging tool for maintainers. It should never have been exposed in
  the API in the first place.

Makefile

@@ -2,9 +2,9 @@ CC?=gcc
 AR?=ar
 
 CPPFLAGS += -I.
-CPPFLAGS_DEBUG = $(CPPFLAGS) -DHTTP_PARSER_STRICT=1 -DHTTP_PARSER_DEBUG=1
+CPPFLAGS_DEBUG = $(CPPFLAGS) -DHTTP_PARSER_STRICT=1
 CPPFLAGS_DEBUG += $(CPPFLAGS_DEBUG_EXTRA)
-CPPFLAGS_FAST = $(CPPFLAGS) -DHTTP_PARSER_STRICT=0 -DHTTP_PARSER_DEBUG=0
+CPPFLAGS_FAST = $(CPPFLAGS) -DHTTP_PARSER_STRICT=0
 CPPFLAGS_FAST += $(CPPFLAGS_FAST_EXTRA)
 
 CFLAGS += -Wall -Wextra -Werror

http_parser.c

@@ -51,18 +51,10 @@
 # define ELEM_AT(a, i, v) ((unsigned int) (i) < ARRAY_SIZE(a) ? (a)[(i)] : (v))
 #endif
 
-#if HTTP_PARSER_DEBUG
 #define SET_ERRNO(e)                                                 \
 do {                                                                 \
   parser->http_errno = (e);                                          \
-  parser->error_lineno = __LINE__;                                   \
 } while(0)
-#else
-#define SET_ERRNO(e)                                                 \
-do {                                                                 \
-  parser->http_errno = (e);                                          \
-} while(0)
-#endif
 
 
 /* Run the notify callback FOR, returning ER if it fails */

http_parser.h

@@ -51,14 +51,6 @@ typedef SSIZE_T ssize_t;
 # define HTTP_PARSER_STRICT 1
 #endif
 
-/* Compile with -DHTTP_PARSER_DEBUG=1 to add extra debugging information to
- * the error reporting facility.
- */
-#ifndef HTTP_PARSER_DEBUG
-# define HTTP_PARSER_DEBUG 0
-#endif
-
-
 /* Maximium header size allowed */
 #define HTTP_MAX_HEADER_SIZE (80*1024)
 
@@ -196,13 +188,6 @@ enum http_errno {
 /* Get an http_errno value from an http_parser */
 #define HTTP_PARSER_ERRNO(p)            ((enum http_errno) (p)->http_errno)
 
-/* Get the line number that generated the current error */
-#if HTTP_PARSER_DEBUG
-#define HTTP_PARSER_ERRNO_LINE(p)       ((p)->error_lineno)
-#else
-#define HTTP_PARSER_ERRNO_LINE(p)       0
-#endif
-
 
 struct http_parser {
   /** PRIVATE **/
@@ -229,10 +214,6 @@ struct http_parser {
    */
   unsigned char upgrade : 1;
 
-#if HTTP_PARSER_DEBUG
-  uint32_t error_lineno;
-#endif
-
   /** PUBLIC **/
   void *data; /* A pointer to get hook to the "connection" or "socket" object */
 };

test.c

@@ -1954,8 +1954,7 @@ upgrade_message_fix(char *body, const size_t nread, const size_t nmsgs, ...) {
 static void
 print_error (const char *raw, size_t error_location)
 {
-  fprintf(stderr, "\n*** %s:%d -- %s ***\n\n",
-          "http_parser.c", HTTP_PARSER_ERRNO_LINE(parser),
+  fprintf(stderr, "\n*** %s ***\n\n",
           http_errno_description(HTTP_PARSER_ERRNO(parser)));
 
   int this_line = 0, char_len = 0;