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jedioutcast/utils/common/cmdlib.c

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Jedi Outcast v056
2013-04-04 18:02:27 +00:00
// cmdlib.c
#include "cmdlib.h"
#include <sys/types.h>
#include <sys/stat.h>
#ifdef Q3DATA
#include "conio.h"
extern qboolean gbKeyPress;
#endif
#ifdef WIN32
#include <direct.h>
#endif
#ifdef NeXT
#include <libc.h>
#endif
#define BASEDIRNAME "base" // important that these 2 are in this order!!!!
#define BASEDIRNAME2 "game" //
#define PATHSEPERATOR '/'
// set these before calling CheckParm
int myargc;
char **myargv;
char com_token[1024];
qboolean com_eof;
qboolean archive;
char archivedir[1024];
char baseDirName[64] = {BASEDIRNAME};
void setQDir( const char* newName)
{
strncpy(baseDirName,newName, sizeof(baseDirName));
}
/*
===================
ExpandWildcards
Mimic unix command line expansion
===================
*/
#define MAX_EX_ARGC 1024
int ex_argc;
char *ex_argv[MAX_EX_ARGC];
#ifdef _WIN32
#include "io.h"
void ExpandWildcards( int *argc, char ***argv )
{
struct _finddata_t fileinfo;
int handle;
int i;
char filename[1024];
char filebase[1024];
char *path;
ex_argc = 0;
for (i=0 ; i<*argc ; i++)
{
path = (*argv)[i];
if ( path[0] == '-'
|| ( !strstr(path, "*") && !strstr(path, "?") ) )
{
ex_argv[ex_argc++] = path;
continue;
}
handle = _findfirst (path, &fileinfo);
if (handle == -1)
return;
ExtractFilePath (path, filebase);
do
{
sprintf (filename, "%s%s", filebase, fileinfo.name);
ex_argv[ex_argc++] = copystring (filename);
} while (_findnext( handle, &fileinfo ) != -1);
_findclose (handle);
}
*argc = ex_argc;
*argv = ex_argv;
}
#else
void ExpandWildcards (int *argc, char ***argv)
{
}
#endif
#ifdef WIN_ERROR
#include <windows.h>
/*
=================
Error
For abnormal program terminations in windowed apps
=================
*/
void Error( const char *error, ... )
{
va_list argptr;
char text[1024];
char text2[1024];
int err;
err = GetLastError ();
va_start (argptr,error);
vsprintf (text, error,argptr);
va_end (argptr);
sprintf (text2, "%s\nGetLastError() = %i", text, err);
MessageBox(NULL, text2, "Error", 0 /* MB_OK */ );
exit (1);
}
#else
/*
=================
Error
For abnormal program terminations in console apps
=================
*/
void Error( const char *error, ...)
{
va_list argptr;
printf ("\n************ ERROR ************\n");
va_start (argptr,error);
vprintf (error,argptr);
va_end (argptr);
printf ("\n");
#ifdef Q3DATA
if (gbKeyPress)
{
printf("\nPress any key...\n\n");
getch();
}
#endif
exit (1);
}
#endif
// only printf if in verbose mode
qboolean verbose = qfalse;
void qprintf( const char *format, ... ) {
va_list argptr;
if (!verbose)
return;
va_start (argptr,format);
vprintf (format,argptr);
va_end (argptr);
}
/*
qdir will hold the path up to the quake directory, including the slash
f:\quake\
/raid/quake/
gamedir will hold qdir + the game directory (id1, id2, etc)
*/
char qdir[1024];
char gamedir[1024];
char writedir[1024];
static qboolean SetQdirFromPath2( const char *path, const char *psBaseDir )
{
const char *c;
const char *sep;
int len, count;
char temp[1024];
if (!(path[0] == '/' || path[0] == '\\' || path[1] == ':'))
{ // path is partial
Q_getwd (temp);
strcat (temp, path);
path = temp;
}
else
{
strcpy(temp,path);
path = temp;
}
_strlwr((char*)path);
// search for "base" in path from the RIGHT hand side (and must have a [back]slash just before it)
len = strlen(psBaseDir);
for (c=path+strlen(path)-1 ; c != path ; c--)
{
int i;
if (!strnicmp (c, psBaseDir, len)
&&
(*(c-1) == '/' || *(c-1) == '\\') // would be more efficient to do this first, but only checking after a strncasecmp ok ensures no invalid pointer-1 access
)
{
sep = c + len;
count = 1;
while (*sep && *sep != '/' && *sep != '\\')
{
sep++;
count++;
}
strncpy (gamedir, path, c+len+count-path);
gamedir[c+len+count-path]='\0';
for ( i = 0; i < (int)strlen( gamedir ); i++ )
{
if ( gamedir[i] == '\\' )
gamedir[i] = '/';
}
// qprintf ("gamedir: %s\n", gamedir);
strncpy (qdir, path, c-path);
qdir[c-path] = 0;
for ( i = 0; i < (int)strlen( qdir ); i++ )
{
if ( qdir[i] == '\\' )
qdir[i] = '/';
}
// qprintf ("qdir: %s\n", qdir);
if ( !writedir[0] )
strcpy( writedir, gamedir );
else if ( writedir[strlen( writedir )-1] != '/' )
{
writedir[strlen( writedir )] = '/';
writedir[strlen( writedir )+1] = 0;
}
return qtrue;
}
}
// Error ("SetQdirFromPath: no '%s' in %s", BASEDIRNAME, path);
return qfalse;
}
/*
static qboolean SetQdirFromPath2( const char *path, const char *psBaseDirName )
{
char temp[1024];
const char *c;
const char *sep;
int len, count;
if (!(path[0] == '/' || path[0] == '\\' || path[1] == ':'))
{ // path is partial
Q_getwd (temp);
strcat (temp, path);
path = temp;
}
_strlwr((char*)path);
// search for "quake2" in path
len = strlen(psBaseDirName);
for (c=path+strlen(path)-1 ; c != path ; c--)
{
int i;
if (!Q_strncasecmp (c, psBaseDirName, len))
{
// strncpy (qdir, path, c+len+2-path);
// the +2 assumes a 2 or 3 following quake which is not the
// case with a retail install
// so we need to add up how much to the next separator
sep = c + len;
count = 1;
while (*sep && *sep != '/' && *sep != '\\')
{
sep++;
count++;
}
strncpy (qdir, path, c+len+count-path);
qprintf ("qdir: %s\n", qdir);
for ( i = 0; i < strlen( qdir ); i++ )
{
if ( qdir[i] == '\\' )
qdir[i] = '/';
}
c += len+count;
while (*c)
{
if (*c == '/' || *c == '\\')
{
strncpy (gamedir, path, c+1-path);
for ( i = 0; i < strlen( gamedir ); i++ )
{
if ( gamedir[i] == '\\' )
gamedir[i] = '/';
}
qprintf ("gamedir: %s\n", gamedir);
if ( !writedir[0] )
strcpy( writedir, gamedir );
else if ( writedir[strlen( writedir )-1] != '/' )
{
writedir[strlen( writedir )] = '/';
writedir[strlen( writedir )+1] = 0;
}
return qtrue;
}
c++;
}
Error ("No gamedir in %s", path);
return qfalse;
}
}
// Error ("SetQdirFromPath: no '%s' in %s\n(use -qdir X to change)", psBaseDirName, path);
return qfalse;
}
*/
void SetQdirFromPath( const char *path )
{
if (SetQdirFromPath2( path, baseDirName ) // try software version, in case it was overridden
||
SetQdirFromPath2( path, BASEDIRNAME ) // ... else try the two hardwired ones
||
SetQdirFromPath2( path, BASEDIRNAME2 ) // actually, this last isn't needed inhouse, but will work for stuff like "game/demo" instead of "game/base" (I think). Whatever.
)
{
return;
}
// ... else give up...
//
Error("Unable to work out basedir from \"%s\"!\n",path);
}
char *ExpandArg (const char *path)
{
static char full[1024];
if (path[0] != '/' && path[0] != '\\' && path[1] != ':')
{
Q_getwd (full);
strcat (full, path);
}
else
strcpy (full, path);
return full;
}
char *ExpandPath (const char *path)
{
static char full[1024];
if (!qdir)
Error ("ExpandPath called without qdir set");
if (path[0] == '/' || path[0] == '\\' || path[1] == ':') {
strcpy( full, path );
return full;
}
sprintf (full, "%s%s", qdir, path);
return full;
}
char *ExpandGamePath (const char *path)
{
static char full[1024];
if (!qdir)
Error ("ExpandGamePath called without qdir set");
if (path[0] == '/' || path[0] == '\\' || path[1] == ':') {
strcpy( full, path );
return full;
}
sprintf (full, "%s%s", gamedir, path);
return full;
}
char *ExpandPathAndArchive (const char *path)
{
char *expanded;
char archivename[1024];
expanded = ExpandPath (path);
if (archive)
{
sprintf (archivename, "%s/%s", archivedir, path);
QCopyFile (expanded, archivename);
}
return expanded;
}
char *copystring(const char *s)
{
char *b;
b = malloc(strlen(s)+1);
strcpy (b, s);
return b;
}
/*
================
I_FloatTime
================
*/
double I_FloatTime (void)
{
time_t t;
time (&t);
return t;
#if 0
// more precise, less portable
struct timeval tp;
struct timezone tzp;
static int secbase;
gettimeofday(&tp, &tzp);
if (!secbase)
{
secbase = tp.tv_sec;
return tp.tv_usec/1000000.0;
}
return (tp.tv_sec - secbase) + tp.tv_usec/1000000.0;
#endif
}
void Q_getwd (char *out)
{
int i = 0;
#ifdef WIN32
_getcwd (out, 256);
strcat (out, "\\");
#else
getwd (out);
strcat (out, "/");
#endif
while ( out[i] != 0 )
{
if ( out[i] == '\\' )
out[i] = '/';
i++;
}
}
void Q_mkdir (const char *path)
{
#ifdef WIN32
if (_mkdir (path) != -1)
return;
#else
if (mkdir (path, 0777) != -1)
return;
#endif
if (errno != EEXIST)
Error ("mkdir %s: %s",path, strerror(errno));
}
/*
============
FileTime
returns -1 if not present
============
*/
int FileTime (const char *path)
{
struct stat buf;
if (stat (path,&buf) == -1)
return -1;
return buf.st_mtime;
}
/*
==============
COM_Parse
Parse a token out of a string
==============
*/
char *COM_Parse (char *data)
{
int c;
int len;
len = 0;
com_token[0] = 0;
if (!data)
return NULL;
// skip whitespace
skipwhite:
while ( (c = *data) <= ' ')
{
if (c == 0)
{
com_eof = qtrue;
return NULL; // end of file;
}
data++;
}
// skip // comments
if (c=='/' && data[1] == '/')
{
while (*data && *data != '\n')
data++;
goto skipwhite;
}
// handle quoted strings specially
if (c == '\"')
{
data++;
do
{
c = *data++;
if (c=='\"')
{
com_token[len] = 0;
return data;
}
com_token[len] = c;
len++;
} while (1);
}
// parse single characters
if (c=='{' || c=='}'|| c==')'|| c=='(' || c=='\'' || c==':')
{
com_token[len] = c;
len++;
com_token[len] = 0;
return data+1;
}
// parse a regular word
do
{
com_token[len] = c;
data++;
len++;
c = *data;
if (c=='{' || c=='}'|| c==')'|| c=='(' || c=='\'' || c==':')
break;
} while (c>32);
com_token[len] = 0;
return data;
}
int Q_strncasecmp (const char *s1, const char *s2, int n)
{
int c1, c2;
do
{
c1 = *s1++;
c2 = *s2++;
if (!n--)
return 0; // strings are equal until end point
if (c1 != c2)
{
if (c1 >= 'a' && c1 <= 'z')
c1 -= ('a' - 'A');
if (c2 >= 'a' && c2 <= 'z')
c2 -= ('a' - 'A');
if (c1 != c2)
return -1; // strings not equal
}
} while (c1);
return 0; // strings are equal
}
int Q_stricmp (const char *s1, const char *s2)
{
return Q_strncasecmp (s1, s2, 99999);
}
char *strupr (char *start)
{
char *in;
in = start;
while (*in)
{
*in = toupper(*in);
in++;
}
return start;
}
char *strlower (char *start)
{
char *in;
in = start;
while (*in)
{
*in = tolower(*in);
in++;
}
return start;
}
/*
=============================================================================
MISC FUNCTIONS
=============================================================================
*/
/*
=================
CheckParm
Checks for the given parameter in the program's command line arguments
Returns the argument number (1 to argc-1) or 0 if not present
=================
*/
int CheckParm (const char *check)
{
int i;
for (i = 1;i<myargc;i++)
{
if ( !Q_stricmp(check, myargv[i]) )
return i;
}
return 0;
}
/*
================
Q_filelength
================
*/
int Q_filelength (FILE *f)
{
int pos;
int end;
pos = ftell (f);
fseek (f, 0, SEEK_END);
end = ftell (f);
fseek (f, pos, SEEK_SET);
return end;
}
FILE *SafeOpenWrite (const char *filename)
{
FILE *f;
f = fopen(filename, "wb");
if (!f)
Error ("Error opening %s: %s",filename,strerror(errno));
return f;
}
FILE *SafeOpenRead (const char *filename)
{
FILE *f;
f = fopen(filename, "rb");
if (!f)
Error ("Error opening %s: %s",filename,strerror(errno));
return f;
}
void SafeRead (FILE *f, void *buffer, int count)
{
if ( fread (buffer, 1, count, f) != (size_t)count)
Error ("File read failure");
}
void SafeWrite (FILE *f, const void *buffer, int count)
{
if (fwrite (buffer, 1, count, f) != (size_t)count)
Error ("File write failure");
}
/*
==============
FileExists
==============
*/
qboolean FileExists (const char *filename)
{
FILE *f;
f = fopen (filename, "r");
if (!f)
return qfalse;
fclose (f);
return qtrue;
}
/*
==============
LoadFile
==============
*/
int LoadFile( const char *filename, void **bufferptr )
{
FILE *f;
int length;
void *buffer;
f = SafeOpenRead (filename);
length = Q_filelength (f);
buffer = malloc (length+1);
((char *)buffer)[length] = 0;
SafeRead (f, buffer, length);
fclose (f);
*bufferptr = buffer;
return length;
}
/*
==============
LoadFileBlock
-
rounds up memory allocation to 4K boundry
-
==============
*/
int LoadFileBlock( const char *filename, void **bufferptr )
{
FILE *f;
int length, nBlock, nAllocSize;
void *buffer;
f = SafeOpenRead (filename);
length = Q_filelength (f);
nAllocSize = length;
nBlock = nAllocSize % MEM_BLOCKSIZE;
if ( nBlock > 0) {
nAllocSize += MEM_BLOCKSIZE - nBlock;
}
buffer = malloc (nAllocSize+1);
memset(buffer, 0, nAllocSize+1);
SafeRead (f, buffer, length);
fclose (f);
*bufferptr = buffer;
return length;
}
/*
==============
TryLoadFile
Allows failure
==============
*/
int TryLoadFile (const char *filename, void **bufferptr)
{
FILE *f;
int length;
void *buffer;
*bufferptr = NULL;
f = fopen (filename, "rb");
if (!f)
return -1;
length = Q_filelength (f);
buffer = malloc (length+1);
((char *)buffer)[length] = 0;
SafeRead (f, buffer, length);
fclose (f);
*bufferptr = buffer;
return length;
}
/*
==============
SaveFile
==============
*/
void SaveFile (const char *filename, const void *buffer, int count)
{
FILE *f;
f = SafeOpenWrite (filename);
SafeWrite (f, buffer, count);
fclose (f);
}
void DefaultExtension (char *path, const char *extension)
{
char *src;
//
// if path doesnt have a .EXT, append extension
// (extension should include the .)
//
src = path + strlen(path) - 1;
while (*src != '/' && *src != '\\' && src != path)
{
if (*src == '.')
return; // it has an extension
src--;
}
strcat (path, extension);
}
void DefaultPath (char *path, const char *basepath)
{
char temp[128];
if (path[0] == PATHSEPERATOR)
return; // absolute path location
strcpy (temp,path);
strcpy (path,basepath);
strcat (path,temp);
}
void StripFilename (char *path)
{
int length;
length = strlen(path)-1;
while (length > 0 && path[length] != PATHSEPERATOR)
length--;
path[length] = 0;
}
void StripExtension (char *path)
{
int length;
length = strlen(path)-1;
while (length > 0 && path[length] != '.')
{
length--;
if (path[length] == '/')
return; // no extension
}
if (length)
path[length] = 0;
}
/*
====================
Extract file parts
====================
*/
// FIXME: should include the slash, otherwise
// backing to an empty path will be wrong when appending a slash
void ExtractFilePath (const char *path, char *dest)
{
const char *src;
src = path + strlen(path) - 1;
//
// back up until a \ or the start
//
while (src != path && *(src-1) != '\\' && *(src-1) != '/')
src--;
memcpy (dest, path, src-path);
dest[src-path] = 0;
}
void ExtractFileBase (const char *path, char *dest)
{
const char *src;
src = path + strlen(path) - 1;
//
// back up until a \ or the start
//
// while (src != path && *(src-1) != PATHSEPERATOR)
while (src != path && *(src-1) != '\\' && *(src-1) != '/')
src--;
while (*src && *src != '.')
{
*dest++ = *src++;
}
*dest = 0;
}
void ExtractFileExtension (const char *path, char *dest)
{
const char *src;
src = path + strlen(path) - 1;
//
// back up until a . or the start
//
while (src != path && *(src-1) != '.')
src--;
if (src == path)
{
*dest = 0; // no extension
return;
}
strcpy (dest,src);
}
/*
==============
ParseNum / ParseHex
==============
*/
int ParseHex (const char *hex)
{
const char *str;
int num;
num = 0;
str = hex;
while (*str)
{
num <<= 4;
if (*str >= '0' && *str <= '9')
num += *str-'0';
else if (*str >= 'a' && *str <= 'f')
num += 10 + *str-'a';
else if (*str >= 'A' && *str <= 'F')
num += 10 + *str-'A';
else
Error ("Bad hex number: %s",hex);
str++;
}
return num;
}
int ParseNum (const char *str)
{
if (str[0] == '$')
return ParseHex (str+1);
if (str[0] == '0' && str[1] == 'x')
return ParseHex (str+2);
return atol (str);
}
/*
============================================================================
BYTE ORDER FUNCTIONS
============================================================================
*/
#ifdef _SGI_SOURCE
#define __BIG_ENDIAN__
#endif
#ifdef __BIG_ENDIAN__
short LittleShort (short l)
{
byte b1,b2;
b1 = l&255;
b2 = (l>>8)&255;
return (b1<<8) + b2;
}
short BigShort (short l)
{
return l;
}
int LittleLong (int l)
{
byte b1,b2,b3,b4;
b1 = l&255;
b2 = (l>>8)&255;
b3 = (l>>16)&255;
b4 = (l>>24)&255;
return ((int)b1<<24) + ((int)b2<<16) + ((int)b3<<8) + b4;
}
int BigLong (int l)
{
return l;
}
float LittleFloat (float l)
{
union {byte b[4]; float f;} in, out;
in.f = l;
out.b[0] = in.b[3];
out.b[1] = in.b[2];
out.b[2] = in.b[1];
out.b[3] = in.b[0];
return out.f;
}
float BigFloat (float l)
{
return l;
}
#else
short BigShort (short l)
{
byte b1,b2;
b1 = l&255;
b2 = (l>>8)&255;
return (b1<<8) + b2;
}
short LittleShort (short l)
{
return l;
}
int BigLong (int l)
{
byte b1,b2,b3,b4;
b1 = l&255;
b2 = (l>>8)&255;
b3 = (l>>16)&255;
b4 = (l>>24)&255;
return ((int)b1<<24) + ((int)b2<<16) + ((int)b3<<8) + b4;
}
int LittleLong (int l)
{
return l;
}
float BigFloat (float l)
{
union {byte b[4]; float f;} in, out;
in.f = l;
out.b[0] = in.b[3];
out.b[1] = in.b[2];
out.b[2] = in.b[1];
out.b[3] = in.b[0];
return out.f;
}
float LittleFloat (float l)
{
return l;
}
#endif
//=======================================================
// FIXME: byte swap?
// this is a 16 bit, non-reflected CRC using the polynomial 0x1021
// and the initial and final xor values shown below... in other words, the
// CCITT standard CRC used by XMODEM
#define CRC_INIT_VALUE 0xffff
#define CRC_XOR_VALUE 0x0000
static unsigned short crctable[256] =
{
0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
};
void CRC_Init(unsigned short *crcvalue)
{
*crcvalue = CRC_INIT_VALUE;
}
void CRC_ProcessByte(unsigned short *crcvalue, byte data)
{
*crcvalue = (*crcvalue << 8) ^ crctable[(*crcvalue >> 8) ^ data];
}
unsigned short CRC_Value(unsigned short crcvalue)
{
return crcvalue ^ CRC_XOR_VALUE;
}
//=============================================================================
/*
============
CreatePath
============
*/
void CreatePath (const char *path)
{
const char *ofs;
char c;
char dir[1024];
#ifdef _WIN32
int olddrive = -1;
if ( path[1] == ':' )
{
olddrive = _getdrive();
_chdrive( toupper( path[0] ) - 'A' + 1 );
}
#endif
if (path[1] == ':')
path += 2;
for (ofs = path+1 ; *ofs ; ofs++)
{
c = *ofs;
if (c == '/' || c == '\\')
{ // create the directory
memcpy( dir, path, ofs - path );
dir[ ofs - path ] = 0;
Q_mkdir( dir );
}
}
#ifdef _WIN32
if ( olddrive != -1 )
{
_chdrive( olddrive );
}
#endif
}
/*
============
QCopyFile
Used to archive source files
============
*/
void QCopyFile (const char *from, const char *to)
{
void *buffer;
int length;
length = LoadFile (from, &buffer);
CreatePath (to);
SaveFile (to, buffer, length);
free (buffer);
}
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