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/*
* qstat
* by Steve Jankowski
* steve@qstat.org
* http://www.qstat.org
*
* Copyright 1996,1997,1998,1999 by Steve Jankowski
*
* Licensed under the Artistic License, see LICENSE.txt for license terms
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include "config.h"
#ifdef __hpux
#define STATIC static
#else
#define STATIC
#endif
#ifdef _WIN32
#define strcasecmp stricmp
#endif
#ifdef _WIN32
#define HOME_CONFIG_FILE "qstat.cfg"
#else
#define HOME_CONFIG_FILE ".qstatrc"
#endif
static server_type ** config_types;
static int n_config_types;
static int max_config_types;
static int next_gametype_id= LAST_BUILTIN_SERVER+1;
static int load_config_file(char const* filename);
static int try_load_config_file(char const* filename, int const show_error);
static int pf_top_level( char *text, void *context);
static int pf_gametype_new( char *text, void *context);
static int pf_gametype_modify( char *text, void *context);
static int set_game_type_value( server_type *gametype, int key, char *value);
static int modify_game_type_value( server_type *gametype, int key, char *value);
static int set_packet_value(server_type* gametype, char const* value,
char const* packet_name, char** packet, int* len);
static char *first_token( char *text);
static char *next_token();
static char *next_token_dup();
static char *next_value();
static char * parse_value( char *source, int len);
static unsigned int parse_hex( char *hex, int len, int *error);
static unsigned int parse_oct( char *oct, int len, int *error);
static char *force_lower_case( char *string);
static char *force_upper_case( char *string);
static char *get_token();
static void *memdup( const void *mem, unsigned int len);
int parse_config_file( FILE *file);
static int (*parse_func)( char *, void *);
static void *parse_context;
static int line;
static char const* current_file_name;
static char *parse_text;
static char *parse_end;
static char *lex;
static char *token_end;
static char token_buf[1024];
static int value_len;
static int debug= 0;
#define REPORT_ERROR(a) print_location(); fprintf a; fprintf(stderr, "\n")
enum {
CK_NONE = 0,
CK_MASTER_PROTOCOL,
CK_MASTER_QUERY,
CK_MASTER_PACKET,
CK_FLAGS,
CK_NAME,
CK_DEFAULT_PORT,
CK_GAME_RULE,
CK_TEMPLATE_VAR,
CK_MASTER_TYPE,
CK_STATUS_PACKET,
CK_STATUS2_PACKET,
CK_PLAYER_PACKET,
CK_RULE_PACKET,
CK_PORT_OFFSET
};
typedef struct _config_key {
int key;
char *key_name;
} ConfigKey;
static ConfigKey const new_keys[] = {
{ CK_MASTER_PROTOCOL, "master protocol" },
{ CK_MASTER_QUERY, "master query" },
{ CK_MASTER_PACKET, "master packet" },
{ CK_FLAGS, "flags" },
{ CK_NAME, "name" },
{ CK_DEFAULT_PORT, "default port" },
{ CK_GAME_RULE, "game rule" },
{ CK_TEMPLATE_VAR, "template var" },
{ CK_MASTER_TYPE, "master for gametype" },
{ CK_STATUS_PACKET, "status packet" },
{ CK_STATUS2_PACKET, "status2 packet" },
{ CK_PLAYER_PACKET, "player packet" },
{ CK_RULE_PACKET, "rule packet" },
{ CK_PORT_OFFSET, "status port offset" },
{ 0, NULL },
};
static ConfigKey const modify_keys[] = {
{ CK_MASTER_PROTOCOL, "master protocol" },
{ CK_MASTER_QUERY, "master query" },
{ CK_MASTER_PACKET, "master packet" },
{ CK_FLAGS, "flags" },
{ CK_MASTER_TYPE, "master for gametype" },
{ 0, NULL },
};
typedef struct {
const char *name;
int value;
} ServerFlag;
#define SERVER_FLAG(x) { #x, x }
ServerFlag const server_flags[] = {
SERVER_FLAG(TF_SINGLE_QUERY),
SERVER_FLAG(TF_OUTFILE),
SERVER_FLAG(TF_MASTER_MULTI_RESPONSE),
SERVER_FLAG(TF_TCP_CONNECT),
SERVER_FLAG(TF_QUERY_ARG),
SERVER_FLAG(TF_QUERY_ARG_REQUIRED),
SERVER_FLAG(TF_QUAKE3_NAMES),
SERVER_FLAG(TF_TRIBES2_NAMES),
SERVER_FLAG(TF_SOF_NAMES),
SERVER_FLAG(TF_U2_NAMES),
SERVER_FLAG(TF_RAW_STYLE_QUAKE),
SERVER_FLAG(TF_RAW_STYLE_TRIBES),
SERVER_FLAG(TF_RAW_STYLE_GHOSTRECON),
SERVER_FLAG(TF_NO_PORT_OFFSET),
SERVER_FLAG(TF_SHOW_GAME_PORT),
{ NULL, 0 }
};
#undef SERVER_FLAG
static int get_config_key( char *first_token, const ConfigKey *keys);
static void add_config_type( server_type *gametype);
static server_type * get_config_type( char *game_type);
static void copy_server_type( server_type *dest, server_type *source);
static server_type * get_server_type( char *game_type);
static server_type * get_builtin_type( char *game_type);
typedef struct _gametype_context {
char *type;
char *extend_type;
server_type *gametype;
} GameTypeContext;
static void
print_location()
{
fprintf( stderr, "%s line %d: ", current_file_name, line);
}
int
qsc_load_default_config_files()
{
int rc= 0;
char *filename= NULL, *var;
char path[1024];
var= getenv( "QSTAT_CONFIG");
if ( var != NULL && var[0] != '\0') {
rc= try_load_config_file( var, 1);
if ( rc == 0 || rc == -1)
return rc;
}
var= getenv( "HOME");
if ( var != NULL && var[0] != '\0') {
int len= strlen(var);
if ( len > 900)
len= 900;
strncpy( path, var, len);
path[len]= '\0';
strcat( path, "/");
strcat( path, HOME_CONFIG_FILE);
/* sprintf( path, "%s/%s", var, HOME_CONFIG_FILE); */
rc= try_load_config_file( path, 0);
if ( rc == 0 || rc == -1)
return rc;
}
#ifdef sysconfdir
strcpy( path, sysconfdir "/qstat.cfg");
filename= path;
#elif defined(_WIN32)
if ( filename == NULL && _pgmptr && strchr( _pgmptr, '\\')) {
char *slash= strrchr( _pgmptr, '\\');
strncpy( path, _pgmptr, slash - _pgmptr);
path[slash - _pgmptr]= '\0';
strcat( path, "\\qstat.cfg");
filename= path;
}
#endif
if ( filename != NULL) {
rc= try_load_config_file( filename, 0);
if ( rc == 0 || rc == -1)
return rc;
}
return rc;
/*
if ( rc == -2 && show_error) {
perror( filename);
fprintf( stderr, "Error: Could not open config file \"%s\"\n",
filename);
}
else if ( rc == -1 && show_error)
fprintf( stderr, "Error: Error loading $QSTAT_CONFIG file\n");
return rc;
*/
#ifdef foo
filename= getenv( "HOME");
if ( filename != NULL && filename[0] != '\0') {
char path[1024];
snprintf( path, (sizeof(path) -1),"%s/%s", var, HOME_CONFIG_FILE);
}
/* 1. $QSTAT_CONFIG
2. UNIX: $HOME/.qstatrc WIN: $HOME/qstat.cfg
3. UNIX: sysconfdir/qstat.cfg WIN: qstat.exe-dir/qstat.cfg
*/
rc= load_config_file( "qstat.cfg");
if ( rc == -1)
fprintf( stderr, "Warning: Error loading default qstat.cfg\n");
return 0;
#endif
}
int
qsc_load_config_file(char const* filename)
{
int rc= load_config_file( filename);
if ( rc == -2) {
perror( filename);
fprintf( stderr, "Could not open config file \"%s\"\n",
filename);
return -1;
}
return rc;
}
server_type **
qsc_get_config_server_types( int *n_config_types_ref)
{
if ( n_config_types_ref)
*n_config_types_ref= n_config_types;
return config_types;
}
STATIC int
try_load_config_file(char const* filename, int const show_error)
{
int rc= load_config_file( filename);
if ( rc == -2 && show_error) {
perror( filename);
fprintf( stderr, "Error: Could not open config file \"%s\"\n",
filename);
}
else if ( rc == -1)
fprintf( stderr, "Error: Could not load config file \"%s\"\n",
filename);
return rc;
}
STATIC int
load_config_file(char const* filename)
{
FILE *file;
int rc;
file= fopen( filename, "r");
if ( file == NULL)
return -2;
current_file_name= filename;
rc= parse_config_file( file);
fclose(file);
return rc;
}
int
parse_config_file( FILE *file)
{
char buf[4096];
int rc;
line= 0;
parse_func= pf_top_level;
while ( fgets( buf, sizeof(buf), file) != NULL) {
int len= strlen(buf);
while ( len && (buf[len-1] == '\n' || buf[len-1] == '\r'))
len--;
buf[len]= '\0';
line++;
rc= parse_func( buf, parse_context);
if ( rc != 0)
return rc;
}
return 0;
}
/* Top level
* Keywords: gametype
*/
STATIC int
pf_top_level( char *text, void *_context)
{
GameTypeContext *context;
server_type *extend;
char *token, *game_type, *extend_type;
token= first_token( text);
if ( token == NULL)
return 0;
if ( strcmp( token, "gametype") != 0) {
REPORT_ERROR(( stderr, "Unknown config command \"%s\"", token));
return -1;
}
game_type= next_token_dup();
if ( game_type == NULL) {
REPORT_ERROR(( stderr, "Missing game type"));
return -1;
}
force_lower_case( game_type);
token= next_token();
if ( token == NULL) {
REPORT_ERROR(( stderr, "Expecting \"new\" or \"modify\""));
return -1;
}
if ( strcmp( token, "new") == 0) {
parse_func= pf_gametype_new;
}
else if ( strcmp( token, "modify") == 0) {
parse_func= pf_gametype_modify;
}
else {
REPORT_ERROR(( stderr, "Expecting \"new\" or \"modify\""));
return -1;
}
context= (GameTypeContext*) malloc( sizeof(GameTypeContext));
context->type= game_type;
context->extend_type= NULL;
context->gametype= NULL;
token= next_token();
if ( parse_func == pf_gametype_modify) {
if ( token != NULL) {
REPORT_ERROR(( stderr, "Extra text after gametype modify"));
return -1;
}
context->gametype= get_server_type( game_type);
if ( context->gametype == NULL) {
REPORT_ERROR(( stderr, "Unknown game type \"%s\"", game_type));
free(context);
return -1;
}
parse_context= context;
return 0;
}
if ( token == NULL || strcmp( token, "extend") != 0) {
REPORT_ERROR(( stderr, "Expecting \"extend\""));
return -1;
}
extend_type= next_token();
if ( extend_type == NULL) {
REPORT_ERROR(( stderr, "Missing extend game type"));
return -1;
}
force_lower_case( extend_type);
if ( strcasecmp( extend_type, game_type) == 0) {
REPORT_ERROR(( stderr, "Identical game type and extend type"));
return -1;
}
context->extend_type= extend_type;
extend= get_server_type( extend_type);
if ( extend == NULL) {
REPORT_ERROR(( stderr, "Unknown extend game type \"%s\"", extend_type));
return -1;
}
/* Over-write a previous gametype new */
context->gametype= get_config_type( game_type);
if ( context->gametype == NULL)
context->gametype= (server_type*) malloc( sizeof(server_type));
copy_server_type( context->gametype, extend);
/* Set flag for new type-id if not re-defining previous config type */
if ( get_config_type( game_type) == NULL)
context->gametype->id= 0;
context->gametype->type_string= game_type;
context->gametype->type_prefix= strdup(game_type);
force_upper_case( context->gametype->type_prefix);
context->gametype->type_option= (char*)malloc( strlen(game_type)+2);
context->gametype->type_option[0]= '-';
strcpy( &context->gametype->type_option[1], game_type);
parse_context= context;
return 0;
}
STATIC int
pf_gametype_modify( char *text, void *_context)
{
GameTypeContext *context= (GameTypeContext*) _context;
char *token;
int key;
token= first_token( text);
if ( token == NULL)
return 0;
if ( strcmp( token, "end") == 0) {
parse_func= pf_top_level;
parse_context= NULL;
return 0;
}
key= get_config_key( token, modify_keys);
token= next_token();
if ( strcmp( token, "=") != 0) {
REPORT_ERROR(( stderr, "Expecting \"=\", found \"%s\"", token));
return -1;
}
token= next_value();
if ( token == NULL) {
REPORT_ERROR(( stderr, "Missing value after \"=\""));
return -1;
}
if ( debug)
printf( "%d %s = <%s>\n", key, modify_keys[key-1].key_name,
token?token:"");
return modify_game_type_value( context->gametype, key, token);
}
STATIC int
pf_gametype_new( char *text, void *_context)
{
GameTypeContext *context= (GameTypeContext*) _context;
char *token;
int key;
token= first_token( text);
if ( token == NULL)
return 0;
if ( strcmp( token, "end") == 0) {
add_config_type( context->gametype);
parse_func= pf_top_level;
parse_context= NULL;
return 0;
}
key= get_config_key( token, new_keys);
if ( key <= 0)
return key;
token= next_token();
if ( strcmp( token, "=") != 0) {
REPORT_ERROR(( stderr, "Expecting \"=\", found \"%s\"", token));
return -1;
}
token= next_value();
if ( token == NULL && (key != CK_MASTER_PROTOCOL && key != CK_MASTER_QUERY)) {
REPORT_ERROR(( stderr, "Missing value after \"=\""));
return -1;
}
if ( debug)
printf("%d %s = <%s>\n", key, new_keys[key-1].key_name, token?token:"");
return set_game_type_value( context->gametype, key, token);
}
STATIC int
get_config_key( char *first_token, const ConfigKey *keys)
{
char key_name[1024], *token;
int key= 0;
strcpy( key_name, first_token);
do {
int k;
for ( k= 0; keys[k].key_name; k++) {
if ( strcmp( keys[k].key_name, key_name) == 0) {
key= keys[k].key;
break;
}
}
if ( key)
break;
token= next_token();
if ( token == NULL || strcmp( token, "=") == 0)
break;
if ( strlen(key_name) + strlen(token) > sizeof(key_name)-2) {
REPORT_ERROR(( stderr, "Key name too long"));
return -1;
}
strcat( key_name, " ");
strcat( key_name, token);
} while ( 1);
if ( key == 0) {
REPORT_ERROR(( stderr, "Unknown config key \"%s\"", key_name));
return -1;
}
return key;
}
STATIC int get_server_flag_value(const char* value, unsigned len)
{
int i= 0;
for ( i= 0; server_flags[i].name; ++i) {
if ( len == strlen(server_flags[i].name) &&
strncmp( server_flags[i].name, value, len) == 0) {
return server_flags[i].value;
}
}
return -1;
}
STATIC int parse_server_flags(const char* value)
{
int val = 0, v, first = 1;
const char* s = value;
const char* e;
while(*s)
{
while(isspace((unsigned char)*s))
++s;
if(!first)
{
if(*s != '|') {
REPORT_ERROR(( stderr, "Syntax error: expecting |"));
val = -1;
break;
}
++s;
while(isspace((unsigned char)*s))
++s;
}
else
first = 0;
e = s;
while(isalnum((unsigned char)*e) || *e == '_')
++e;
if(e == s) {
REPORT_ERROR(( stderr, "Syntax error: expecting flag"));
val = -1;
break;
}
v = get_server_flag_value(s, e-s);
if(v == -1) {
REPORT_ERROR(( stderr, "Syntax error: invalid flag"));
val = -1;
break;
}
s = e;
val |= v;
}
return val;
}
STATIC int
set_game_type_value( server_type *gametype, int key, char *value)
{
switch ( key) {
case CK_NAME:
gametype->game_name= strdup(value);
break;
case CK_FLAGS:
{
int flags = parse_server_flags(value);
if(flags == -1)
return -1;
gametype->flags = flags;
}
break;
case CK_DEFAULT_PORT: {
unsigned short port;
if ( sscanf( value, "%hu", &port) != 1) {
REPORT_ERROR(( stderr, "Syntax error on port. Should be a number between 1 and 65535."));
return -1;
}
gametype->default_port= port;
break;
}
case CK_GAME_RULE:
gametype->game_rule= strdup(value);
break;
case CK_TEMPLATE_VAR:
gametype->template_var= strdup(value);
force_upper_case( gametype->template_var);
break;
case CK_MASTER_PROTOCOL:
if ( ! gametype->master) {
REPORT_ERROR((stderr, "Cannot set master protocol on non-master game type\n"));
return -1;
}
if ( value)
gametype->master_protocol= strdup(value);
else
gametype->master_protocol= NULL;
break;
case CK_MASTER_QUERY:
if ( ! gametype->master) {
REPORT_ERROR((stderr, "Cannot set master query on non-master game type\n"));
return -1;
}
if ( value)
gametype->master_query= strdup(value);
else
gametype->master_query= NULL;
break;
case CK_MASTER_TYPE:
{
server_type *type;
if ( ! gametype->master) {
REPORT_ERROR((stderr, "Cannot set master type on non-master game type\n"));
return -1;
}
force_lower_case( value);
type= get_server_type( value);
if ( type == NULL) {
REPORT_ERROR((stderr, "Unknown server type \"%s\"\n", value));
return -1;
}
gametype->master= type->id;
}
break;
case CK_MASTER_PACKET:
if ( ! gametype->master) {
REPORT_ERROR((stderr, "Cannot set master packet on non-master game type"));
return -1;
}
if ( value == NULL || value[0] == '\0') {
REPORT_ERROR((stderr, "Empty master packet"));
return -1;
}
gametype->master_packet= memdup( value, value_len);
gametype->master_len= value_len;
break;
case CK_STATUS_PACKET:
return set_packet_value( gametype, value, "status",
&gametype->status_packet, &gametype->status_len);
case CK_STATUS2_PACKET:
return set_packet_value( gametype, value, "status2",
&gametype->rule_packet, &gametype->rule_len);
case CK_PLAYER_PACKET:
return set_packet_value( gametype, value, "player",
&gametype->player_packet, &gametype->player_len);
case CK_RULE_PACKET:
return set_packet_value( gametype, value, "rule",
&gametype->rule_packet, &gametype->rule_len);
case CK_PORT_OFFSET: {
short port;
if ( sscanf( value, "%hd", &port) != 1) {
REPORT_ERROR(( stderr, "Syntax error on port. Should be a number between 32767 and -32768."));
return -1;
}
gametype->port_offset= port;
break;
}
}
return 0;
}
STATIC int
set_packet_value(server_type* gametype, char const* value, char const* packet_name,
char **packet, int *len)
{
if ( gametype->master) {
REPORT_ERROR((stderr, "Cannot set info packet on master game type"));
return -1;
}
if ( value == NULL || value[0] == '\0') {
REPORT_ERROR((stderr, "Empty %s packet", packet_name));
return -1;
}
// Removed as this doesn't seem to be any reason why we can't do this and it works just fine for warsow
//if ( *packet == NULL) {
// REPORT_ERROR((stderr, "Cannot set %s packet; extend game type does not define a %s packet", packet_name, packet_name));
// return -1;
//}
*packet= memdup( value, value_len);
*len= value_len;
return 0;
}
STATIC int
modify_game_type_value( server_type *gametype, int key, char *value)
{
switch ( key) {
case CK_FLAGS:
{
int flags = parse_server_flags(value);
if(flags == -1)
return -1;
gametype->flags = flags;
}
break;
case CK_MASTER_PROTOCOL:
if ( ! gametype->master) {
REPORT_ERROR((stderr, "Cannot set master protocol on non-master game type"));
return -1;
}
if ( value)
gametype->master_protocol= strdup(value);
else
gametype->master_protocol= NULL;
break;
case CK_MASTER_QUERY:
if ( ! gametype->master) {
REPORT_ERROR((stderr, "Cannot set master query on non-master game type"));
return -1;
}
if ( value)
gametype->master_query= strdup(value);
else
gametype->master_query= NULL;
break;
case CK_MASTER_PACKET:
if ( ! gametype->master) {
REPORT_ERROR((stderr, "Cannot set master packet on non-master game type"));
return -1;
}
if ( value == NULL || value[0] == '\0') {
REPORT_ERROR((stderr, "Empty master packet"));
return -1;
}
gametype->master_packet= memdup( value, value_len);
gametype->master_len= value_len;
break;
case CK_MASTER_TYPE:
{
server_type *type;
if ( ! gametype->master) {
REPORT_ERROR((stderr, "Cannot set master type on non-master game type\n"));
return -1;
}
force_lower_case( value);
type= get_server_type( value);
if ( type == NULL) {
REPORT_ERROR((stderr, "Unknown server type \"%s\"\n", value));
return -1;
}
gametype->master= type->id;
}
break;
}
return 0;
}
STATIC server_type *
get_server_type( char *game_type)
{
server_type *result;
result= get_builtin_type( game_type);
if ( result != NULL)
return result;
return get_config_type( game_type);
}
STATIC server_type*
get_builtin_type( char* type_string)
{
server_type *type= &builtin_types[0];
for ( ; type->id != Q_UNKNOWN_TYPE; type++)
if ( strcmp( type->type_string, type_string) == 0)
return type;
return NULL;
}
STATIC void
add_config_type( server_type *gametype)
{
if ( gametype->id == 0) {
if ( next_gametype_id >= MASTER_SERVER) {
REPORT_ERROR(( stderr, "Exceeded game type limit, ignoring \"%s\"",
gametype->type_string));
return;
}
gametype->id= next_gametype_id;
if ( gametype->master)
gametype->id |= MASTER_SERVER;
next_gametype_id++;
}
if ( max_config_types == 0) {
max_config_types= 4;
config_types= (server_type**) malloc(sizeof(server_type*) * (max_config_types + 1));
}
else if ( n_config_types >= max_config_types) {
max_config_types*= 2;
config_types= (server_type**) realloc( config_types,
sizeof(server_type*) * (max_config_types + 1));
}
config_types[ n_config_types]= gametype;
n_config_types++;
}
STATIC server_type *
get_config_type( char *game_type)
{
int i;
for ( i= 0; i < n_config_types; i++)
if ( strcmp( config_types[i]->type_string, game_type) == 0)
return config_types[i];
return NULL;
}
STATIC void
copy_server_type( server_type *dest, server_type *source)
{
*dest= *source;
}
STATIC void *
memdup( const void *mem, unsigned int len)
{
void *result= malloc( len);
if ( NULL == result )
{
REPORT_ERROR(( stderr, "Failed to malloc %d bytes of memory", len ) );
return NULL;
}
memcpy( result, mem, len);
return result;
}
/* Parsing primitives
*/
STATIC char *
first_token( char *text)
{
parse_text= text;
parse_end= parse_text + strlen( parse_text);
lex= text;
token_end= text;
if ( *lex == '#')
return NULL;
return get_token();
}
STATIC char *
next_token()
{
lex= token_end;
return get_token();
}
STATIC char *
next_token_dup()
{
return strdup( next_token());
}
STATIC char *
get_token()
{
char *token= &token_buf[0];
while ( isspace((unsigned char)*token_end))
token_end++;
if ( token_end == parse_end)
return NULL;
while ( (isalnum((unsigned char)*token_end) || *token_end == '.' || *token_end == '_' || *token_end == '-')
&& token < &token_buf[0] + sizeof(token_buf))
*token++= *token_end++;
if ( token == &token_buf[0])
*token++= *token_end++;
*token= '\0';
return &token_buf[0];
}
STATIC char *
next_value()
{
char *token= &token_buf[0];
while ( isspace((unsigned char)*token_end))
token_end++;
if ( token_end == parse_end)
return NULL;
while ( token_end < parse_end && token < &token_buf[0] + sizeof(token_buf))
*token++= *token_end++;
*token--= '\0';
if ( strchr( token_buf, '\\'))
return parse_value(token_buf, (token - token_buf)+1);
while ( isspace((unsigned char)*token))
*token--= '\0';
value_len= token - token_buf + 1;
return &token_buf[0];
}
STATIC char *
parse_value( char *source, int len)
{
char *value, *v, *end;
int error= 0;
value= (char*)malloc( len + 1);
end = v = value;
/*
printf( "parse_value <%.*s>\n", len, source);
*/
for ( ; len; len--, source++) {
if ( *source != '\\') {
*v++= *source;
if ( *source != ' ')
end= v;
continue;
}
source++; len--;
if ( len == 0)
break;
if ( *source == '\\')
*v++= *source;
else if ( *source == 'n')
*v++= '\n';
else if ( *source == 'r')
*v++= '\r';
else if ( *source == ' ')
*v++= ' ';
else if ( *source == 'x') {
source++; len--;
if ( len < 2)
break;
*v++= parse_hex(source, 2, &error);
if ( error)
break;
source++; len--;
}
else if ( isdigit( (unsigned char)*source)) {
if ( len < 3)
break;
*v++= parse_oct(source, 3, &error);
if ( error)
break;
source++; len--;
source++; len--;
}
else {
error= 1;
REPORT_ERROR(( stderr, "Invalid character escape \"%.*s\"", 2,
source-1));
break;
}
end= v;
}
if ( error) {
free(value);
return NULL;
}
value_len= end - value;
memcpy( token_buf, value, value_len);
token_buf[value_len]= '\0';
free(value);
return &token_buf[0];
}
STATIC unsigned int
parse_hex( char *hex, int len, int *error)
{
char *save_hex= hex;
int save_len= len;
unsigned int result= 0;
*error= 0;
for ( ; len; len--, hex++) {
result <<= 4;
if ( ! isxdigit( (unsigned char)*hex)) {
*error= 1;
REPORT_ERROR(( stderr, "Invalid hex \"%.*s\"", save_len+2,
save_hex-2));
return 0;
}
if ( *hex >= '0' && *hex <= '9')
result|= *hex - '0';
else if ( *hex >= 'A' && *hex <= 'F')
result|= ((*hex - 'A') + 10);
else if ( *hex >= 'a' && *hex <= 'f')
result|= ((*hex - 'a') + 10);
}
return result;
}
STATIC unsigned int
parse_oct( char *oct, int len, int *error)
{
char *save_oct= oct;
int save_len= len;
unsigned int result= 0;
*error= 0;
for ( ; len; len--, oct++) {
result <<= 3;
if ( *oct >= '0' && *oct <= '7')
result|= *oct - '0';
else {
*error= 1;
REPORT_ERROR(( stderr, "Invalid octal \"%.*s\"", save_len+1,
save_oct-1));
return 0;
}
}
return result;
}
STATIC char *
force_lower_case( char *string)
{
char *s= string;
for ( ; *s; s++)
*s= tolower(*s);
return string;
}
STATIC char *
force_upper_case( char *string)
{
char *s= string;
for ( ; *s; s++)
*s= toupper(*s);
return string;
}
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