mirror of https://bitbucket.org/CPMADevs/cnq3
507 lines
9.7 KiB
C
507 lines
9.7 KiB
C
/*
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===========================================================================
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Copyright (C) 1999-2005 Id Software, Inc.
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This file is part of Quake III Arena source code.
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Quake III Arena source code is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Quake III Arena source code is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Quake III Arena source code; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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===========================================================================
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*/
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#include "../../qcommon/q_shared.h"
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#include "cmdlib.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#define PATHSEPERATOR '/'
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char com_token[1024];
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qboolean com_eof;
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char *copystring(const char *s)
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{
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char *b;
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b = malloc(strlen(s)+1);
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strcpy (b, s);
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return b;
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}
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float Q_FloatTime()
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{
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clock_t t = clock();
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return ((float)t / CLOCKS_PER_SEC);
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}
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void Q_mkdir( const char* path )
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{
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#ifdef WIN32
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if (_mkdir (path) != -1)
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return;
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#else
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if (mkdir (path, 0777) != -1)
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return;
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#endif
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if (errno != EEXIST)
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Com_Error( ERR_FATAL, "mkdir %s: %s",path, strerror(errno) );
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}
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/*
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============
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FileTime
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returns -1 if not present
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============
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*/
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int FileTime (const char *path)
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{
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struct stat buf;
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if (stat (path,&buf) == -1)
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return -1;
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return buf.st_mtime;
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}
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/*
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==============
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COM_Parse
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Parse a token out of a string
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==============
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*/
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char *ASM_Parse (char *data)
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{
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int c;
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int len;
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len = 0;
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com_token[0] = 0;
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if (!data)
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return NULL;
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// skip whitespace
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skipwhite:
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while ( (c = *data) <= ' ')
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{
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if (c == 0)
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{
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com_eof = qtrue;
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return NULL; // end of file;
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}
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data++;
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}
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// skip // comments
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if (c=='/' && data[1] == '/')
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{
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while (*data && *data != '\n')
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data++;
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goto skipwhite;
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}
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// handle quoted strings specially
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if (c == '\"')
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{
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data++;
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do
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{
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c = *data++;
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if (c=='\"')
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{
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com_token[len] = 0;
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return data;
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}
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com_token[len] = c;
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len++;
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} while (1);
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}
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// parse single characters
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if (c=='{' || c=='}'|| c==')'|| c=='(' || c=='\'' || c==':')
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{
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com_token[len] = c;
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len++;
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com_token[len] = 0;
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return data+1;
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}
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// parse a regular word
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do
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{
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com_token[len] = c;
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data++;
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len++;
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c = *data;
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if (c=='{' || c=='}'|| c==')'|| c=='(' || c=='\'' || c==':')
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break;
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} while (c>32);
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com_token[len] = 0;
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return data;
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}
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/*
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=============================================================================
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MISC FUNCTIONS
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=============================================================================
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*/
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/*
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================
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Q_filelength
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================
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*/
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int Q_filelength (FILE *f)
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{
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int pos;
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int end;
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pos = ftell (f);
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fseek (f, 0, SEEK_END);
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end = ftell (f);
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fseek (f, pos, SEEK_SET);
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return end;
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}
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static FILE* myfopen(const char* filename, const char* mode)
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{
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char* p;
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char fn[MAX_OSPATH];
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fn[0] = '\0';
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strncat(fn, filename, sizeof(fn)-1);
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for(p=fn;*p;++p) if(*p == '\\') *p = '/';
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return fopen(fn, mode);
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}
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FILE* SafeOpenRead( const char* filename )
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{
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FILE* f = myfopen( filename, "rb" );
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if (!f)
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Com_Error( ERR_FATAL, "Error opening %s: %s", filename, strerror(errno) );
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return f;
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}
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FILE* SafeOpenWrite( const char* filename )
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{
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FILE* f = myfopen( filename, "wb" );
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if (!f)
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Com_Error( ERR_FATAL, "Error opening %s: %s", filename, strerror(errno) );
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return f;
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}
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void SafeRead( FILE* f, void* buffer, int count )
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{
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if ( fread(buffer, 1, count, f) != (size_t)count )
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Com_Error( ERR_FATAL, "File read failure" );
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}
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void SafeWrite( FILE* f, const void* buffer, int count )
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{
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if ( fwrite(buffer, 1, count, f) != (size_t)count )
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Com_Error( ERR_FATAL, "File write failure" );
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}
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/*
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==============
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FileExists
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==============
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*/
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qboolean FileExists (const char *filename)
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{
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FILE *f;
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f = myfopen (filename, "r");
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if (!f)
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return qfalse;
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fclose (f);
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return qtrue;
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}
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/*
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==============
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LoadFile
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==============
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*/
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int LoadFile( const char *filename, void **bufferptr )
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{
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FILE *f;
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int length;
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void *buffer;
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f = SafeOpenRead (filename);
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length = Q_filelength (f);
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buffer = malloc (length+1);
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((char *)buffer)[length] = 0;
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SafeRead (f, buffer, length);
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fclose (f);
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*bufferptr = buffer;
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return length;
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}
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/*
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==============
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TryLoadFile
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Allows failure
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==============
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*/
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int TryLoadFile (const char *filename, void **bufferptr)
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{
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FILE *f;
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int length;
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void *buffer;
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*bufferptr = NULL;
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f = myfopen (filename, "rb");
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if (!f)
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return -1;
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length = Q_filelength (f);
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buffer = malloc (length+1);
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((char *)buffer)[length] = 0;
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SafeRead (f, buffer, length);
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fclose (f);
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*bufferptr = buffer;
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return length;
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}
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/*
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==============
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SaveFile
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==============
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*/
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void SaveFile (const char *filename, const void *buffer, int count)
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{
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FILE *f;
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f = SafeOpenWrite (filename);
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SafeWrite (f, buffer, count);
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fclose (f);
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}
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void DefaultPath (char *path, const char *basepath)
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{
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char temp[128];
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if (path[0] == PATHSEPERATOR)
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return; // absolute path location
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strcpy (temp,path);
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strcpy (path,basepath);
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strcat (path,temp);
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}
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void StripFilename (char *path)
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{
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int length;
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length = strlen(path)-1;
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while (length > 0 && path[length] != PATHSEPERATOR)
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length--;
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path[length] = 0;
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}
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static int ParseHex( const char* hex )
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{
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int num = 0;
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const char* s = hex;
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while (*s)
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{
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num <<= 4;
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if (*s >= '0' && *s <= '9')
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num += *s-'0';
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else if (*s >= 'a' && *s <= 'f')
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num += 10 + *s-'a';
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else if (*s >= 'A' && *s <= 'F')
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num += 10 + *s-'A';
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else
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Com_Error( ERR_FATAL, "Bad hex number: %s", hex );
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s++;
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}
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return num;
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}
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int ParseNum( const char* s )
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{
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if (s[0] == '$')
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return ParseHex( s+1 );
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if (s[0] == '0' && s[1] == 'x')
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return ParseHex( s+2 );
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return atoi( s );
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}
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//=======================================================
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// FIXME: byte swap?
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// this is a 16 bit, non-reflected CRC using the polynomial 0x1021
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// and the initial and final xor values shown below...
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// in other words, the CCITT standard CRC used by XMODEM
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#define CRC_INIT_VALUE 0xffff
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#define CRC_XOR_VALUE 0x0000
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static const unsigned short crctable[256] =
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{
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0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
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0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
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0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
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0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
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0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
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0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
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0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
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0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
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0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
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0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
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0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
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0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
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0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
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0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
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0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
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0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
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0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
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0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
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0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
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0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
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0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
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0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
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0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
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0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
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0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
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0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
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0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
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0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
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0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
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0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
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0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
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0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
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};
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void CRC_Init(unsigned short *crcvalue)
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{
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*crcvalue = CRC_INIT_VALUE;
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}
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void CRC_ProcessByte(unsigned short *crcvalue, byte data)
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{
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*crcvalue = (*crcvalue << 8) ^ crctable[(*crcvalue >> 8) ^ data];
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}
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unsigned short CRC_Value(unsigned short crcvalue)
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{
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return crcvalue ^ CRC_XOR_VALUE;
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}
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//=============================================================================
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/*
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============
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CreatePath
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============
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*/
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void CreatePath (const char *path)
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{
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const char *ofs;
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char c;
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char dir[1024];
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#ifdef _WIN32
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int olddrive = -1;
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if ( path[1] == ':' )
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{
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olddrive = _getdrive();
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_chdrive( toupper( path[0] ) - 'A' + 1 );
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}
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#endif
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if (path[1] == ':')
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path += 2;
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for (ofs = path+1 ; *ofs ; ofs++)
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{
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c = *ofs;
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if (c == '/' || c == '\\')
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{ // create the directory
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memcpy( dir, path, ofs - path );
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dir[ ofs - path ] = 0;
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Q_mkdir( dir );
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}
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}
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#ifdef _WIN32
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if ( olddrive != -1 )
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{
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_chdrive( olddrive );
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}
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#endif
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}
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/*
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============
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QCopyFile
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Used to archive source files
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============
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*/
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void QCopyFile (const char *from, const char *to)
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{
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void *buffer;
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int length;
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length = LoadFile (from, &buffer);
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CreatePath (to);
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SaveFile (to, buffer, length);
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free (buffer);
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}
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