util.c
author Michael Granger <ged@FaerieMUD.org>
Wed, 09 Nov 2011 16:15:57 -0800
changeset 26 7b28fb383da2
parent 18 d4ce82194b64
child 22 822094314703
permissions -rw-r--r--
Small suggested content fixes.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/* vim: set noet nosta sw=4 ts=4 ft=c : */
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/*
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Copyright (c) 2011, Mahlon E. Smith <mahlon@martini.nu>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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    * Redistributions of source code must retain the above copyright
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      notice, this list of conditions and the following disclaimer.
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    * Redistributions in binary form must reproduce the above copyright
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      notice, this list of conditions and the following disclaimer in the
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      documentation and/or other materials provided with the distribution.
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    * Neither the name of Mahlon E. Smith nor the names of his
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      contributors may be used to endorse or promote products derived
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      from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "volta.h"
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2
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/*
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 * Output basic usage information.
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 */
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void
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usage( char *prg )
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{
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	printf( "%s [-vh] [-f <filename>] [-d <level>]\n", prg );
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	printf( "    -d <level> Show debug information on stderr\n" );
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	printf( "    -c <filename> Create the volta database from a rules file\n" );
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	printf( "    -f <filename> Specify the database file to use (default is './volta.db')\n");
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	printf( "    -h Usage (you're lookin' at it)\n" );
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	printf( "    -v Display version\n" );
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	printf( "\n" );
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	return;
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}
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/*
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 * Debug function, only output to stderr if the debug level is
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 * equal or greater to the set output level.
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 *
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 * 	level: The minimum debug level that must be set for the 
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 * 	       line to be logged.
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 * 	file:  The current code file that is emitting the log
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 * 	line:  The line number of the code file that is emitting the log
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 * 	... :  any printf style strings and formats that constitute the log message
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 */
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void
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debug( int level, char *file, int line, const char *fmt, ... )
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{
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	if ( v.debugmode < level ) return;
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	char timestamp[20];
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	time_t t = time( NULL );
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	struct tm *now = localtime( &t );
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	strftime( timestamp, 20, "%F %T", now );
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	va_list args;
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	va_start( args, fmt );
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	fprintf( stderr, "%s [%s] #%d %d (%s:%d): ",
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			 PROG, timestamp, getpid(), level, file, line );
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	vfprintf( stderr, fmt, args );
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	va_end( args );
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	fflush( stderr );
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	return;
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}
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/*
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 * Given a string, reverse it in place.
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 */
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void
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reverse_str( char *str )
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{
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	int i = 0;
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	int tmp = 0;
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	int j = strlen( str ) - 1;
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	while ( i < j ) {
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		tmp    = str[i];
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		str[i] = str[j];
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		str[j] = tmp;
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		i++;
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		j--;
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	}
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	return;
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}
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/*
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 * Lowercase a string in place.
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 *
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 */
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void
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lowercase_str( char *str, unsigned short int len )
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{
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	unsigned short int i = 0;
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	char c;
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	for ( ; i < len; i++ ) {
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		c = str[i];
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		str[i] = tolower( c );
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	}
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	return;
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}
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/*
2
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 * Append 'buf' to the end of 'line', a la strcat, except dynamically
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 * grow memory for the target string.
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 *
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 * 'buf' should be null terminated.  Returns the modified line.
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 */
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char *
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extend_line( char *line, const char *buf )
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{
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	char *line_realloc;
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	unsigned short int offset;
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	size_t new_len;
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   138
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	/* find offset and lengths, first assignment */
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	if ( line == NULL ) {
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		offset  = 0;
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		new_len = strlen( buf );
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   143
	}
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	/* find offset and lengths, append to existing string */
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   145
	else {
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		offset  = strlen( line ); /* not including '\0' */
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		new_len = offset + LINE_BUFSIZE;
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	}
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   149
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	debug( 5, LOC, "Extending line %d to %d bytes at offset %d\n", v.timer.lines+1, new_len, offset );
10
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   151
	if ( new_len > LINE_MAX || (line_realloc = realloc(line, sizeof(char) * new_len)) == NULL ) {
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		debug( 5, LOC, "Ignoring line %d, error while allocating memory: %s\n",
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				v.timer.lines+1, (line_realloc == NULL ? strerror(errno) : "Line too large") );
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		free( line ), line = NULL;
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		printf( "\n" );
16
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   156
		fflush( stdout );
2
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	}
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   158
	else {
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		line = line_realloc;
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		memcpy( line + offset, buf, LINE_BUFSIZE );
2
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	}
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	return( line );
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}
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   165
4
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   166
10
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   167
/* 
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 * Allocate memory and copy +length+ bytes (plus 1 for null) from the given
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 * +string+ into a new string, returning a pointer to it.
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 * 
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 */
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char *
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copy_string_token( char *string, unsigned short int length )
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{
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	char *alloc_ptr = NULL;
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   176
	if ( string == NULL || length == 0 ) return ( NULL );
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   177
10
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	if ( (alloc_ptr = calloc( length + 1, sizeof(char) )) == NULL ) {
12
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		debug( 5, LOC, "Unable to allocate memory for token: %s\n", strerror(errno) );
10
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		return( NULL );
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   181
	}
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   182
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   183
	(void)memcpy( alloc_ptr, string, length );
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   184
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   185
	return( alloc_ptr );
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   186
}
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   187
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   188
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   189
/* 
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   190
 * Allocate memory and copy +length+ bytes from the given dotted quad style
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   191
 * +ip_string+ into an in_addr struct, returning a pointer to it.
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   192
 * 
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   193
 */
14
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   194
/*
10
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   195
struct in_addr *
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   196
copy_ipv4_token( char *ip_string, unsigned short int length )
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   197
{
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   198
	struct in_addr *alloc_ptr = NULL;
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   199
	char c_ip[ INET_ADDRSTRLEN ];
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   200
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   201
	if ( ip_string == NULL ) return ( NULL );
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   202
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   203
	(void)strncpy( c_ip, ip_string, length );
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   204
	c_ip[ length ] = '\0';
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   205
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   206
	if ( (alloc_ptr = calloc( length, sizeof(struct in_addr) )) == NULL ) {
12
191b3c25974a Clean up redundant parser actions via preprocessor macros, add a
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   207
		debug( 5, LOC, "Unable to allocate memory for ip '%s': %s\n",
10
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   208
				c_ip, strerror(errno) );
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   209
	}
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   210
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   211
	if ( inet_pton( AF_INET, c_ip, alloc_ptr ) < 1 ) {
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   212
		debug( 1, LOC, "Unable to create in_addr struct for client ip '%s': %s\n",
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   213
				c_ip, strerror(errno) );
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   214
		free( alloc_ptr ), alloc_ptr = NULL;
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diff changeset
   215
	}
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diff changeset
   216
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   217
	return( alloc_ptr );
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diff changeset
   218
}
14
51eb85ae4de4 There isn't a fast way to look up ( value exists or null ) for every
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diff changeset
   219
*/
10
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diff changeset
   220
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   221
/*
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   222
 * Report how many lines were processed per second.
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   223
 *
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   224
 */
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   225
void
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   226
report_speed( void )
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   227
{
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   228
	if ( v.debugmode < 3 ) return;
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diff changeset
   229
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   230
	time_t end_time = time( NULL );
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diff changeset
   231
	double elapsed  = difftime( end_time, v.timer.start );
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diff changeset
   232
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   233
	if ( elapsed > 0 )  {
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diff changeset
   234
		debug( 3, LOC, "Processed %lu lines in %0.1f seconds. (%0.1f lines/sec)\n",
d07309450285 Get the ragel line parser properly tokenizing the input lines. Add a
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diff changeset
   235
				v.timer.lines, elapsed, v.timer.lines/elapsed );
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diff changeset
   236
	}
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diff changeset
   237
	else {
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diff changeset
   238
		debug( 3, LOC, "Processed %lu lines in under a second.\n", v.timer.lines );
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diff changeset
   239
	}
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diff changeset
   240
d07309450285 Get the ragel line parser properly tokenizing the input lines. Add a
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diff changeset
   241
	return;
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diff changeset
   242
}
d07309450285 Get the ragel line parser properly tokenizing the input lines. Add a
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parents: 5
diff changeset
   243