void require_string( char* string ) {
int c;
while (*string) {
c = fgetc( edits );
require_char( *string, c );
++string;
}
}
int read_edit_spec(void) {
//
// I wanted to do just
//
// int count = fscanf( edits, "%d: `%[^`]` -> `%[^`]`\n", &edit_offset, from_string, to_string );
//
// but fscanf has some weird prohibition against accepting
// zero-length fields :( so we just do it by hand:
///
char buf[ 4096 ];
char* p = buf;
int i = fgetc( edits );
if (i == EOF) return FALSE;
do {
*p++ = i;
} while (isdigit( i = fgetc( edits )));
*p = '\0';
edit_offset = atoi( buf );
require_char( ':', i );
require_string( " `" );
p = from_string;
while (( i = fgetc( edits )) != '`') {
require_char(i,i);
*p++ = i;
}
*p = '\0';
require_string( " -> `" );
p = to_string;
while (( i = fgetc( edits )) != '`') {
require_char(i,i);
*p++ = i;
}
*p = '\0';
require_string( "\n" );
return TRUE;
}
Result ws::http_request_parser::consume(char c)
{
switch(state_)
{
case METHOD_GET_1:
return require_char(c, 'G', METHOD_GET_2);
break;
case METHOD_GET_2:
return require_char(c, 'E', METHOD_GET_3);
break;
case METHOD_GET_3:
return require_char(c, 'T', METHOD_GET_SP);
break;
case METHOD_GET_SP:
return require_char(c, ' ', URI);
break;
case URI:
if (c == ' ')
state_ = HTTP_1;
else if (!is_ctl(c))
request.uri.push_back(c);
else
return BAD_REQUEST;
return INDETERMINATE;
break;
case HTTP_1:
return require_char(c, 'H', HTTP_2);
break;
case HTTP_2:
return require_char(c, 'T', HTTP_3);
break;
case HTTP_3:
return require_char(c, 'T', HTTP_4);
break;
case HTTP_4:
return require_char(c, 'P', HTTP_SLASH);
break;
case HTTP_SLASH:
return require_char(c, '/', HTTP_VERSION_MAJOR);
break;
case HTTP_VERSION_MAJOR:
return require_char(c, '1', HTTP_VERSION_POINT);
break;
case HTTP_VERSION_POINT:
return require_char(c, '.', HTTP_VERSION_MINOR);
break;
case HTTP_VERSION_MINOR:
return require_char(c, '1', REQUEST_LINE_CR);
break;
case REQUEST_LINE_CR:
return require_char(c, CR, REQUEST_LINE_LF);
break;
case REQUEST_LINE_LF:
return require_char(c, LF, HEADER_START);
break;
case HEADER_START:
if (c == CR)
{
state_ = FINAL_LF;
return INDETERMINATE;
}
state_ = HEADER_NAME;
return process_header_name_char(c);
break;
case HEADER_NAME:
if (c == ':')
{
state_ = HEADER_VALUE_START;
return INDETERMINATE;
}
return process_header_name_char(c);
break;
case HEADER_VALUE_START:
if (is_lws(c))
return INDETERMINATE;
state_ = HEADER_VALUE;
return process_header_value_char(c);
break;
case HEADER_VALUE:
if (c == CR)
{
header_value_complete();
state_ = HEADER_LF;
return INDETERMINATE;
}
return process_header_value_char(c);
break;
case HEADER_LF:
return require_char(c, LF, HEADER_START);
break;
case FINAL_LF:
if (c == LF)
{
state_ = AFTER_FINAL_LF;
return GOOD;
}
else
return BAD_REQUEST;
break;
case AFTER_FINAL_LF:
return BAD_REQUEST;
break;
}
return BAD_REQUEST;
}
