/* cmdlib.c Command library Copyright (C) 1996-1997 id Software, Inc. Copyright (C) 2001 Jeff Teunissen This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to: Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307, USA $Id$ */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #ifdef HAVE_STRING_H # include #endif #ifdef HAVE_STRINGS_H # include #endif #include #include #ifdef WIN32 #include #endif #ifdef NeXT #include #endif #include "cmdlib.h" #define PATHSEPERATOR '/' // set these before calling CheckParm int myargc; char **myargv; char com_token[1024]; qboolean com_eof; /* Error For abnormal program terminations */ void Error (char *error, ...) { va_list argptr; printf ("************ ERROR ************\n"); va_start (argptr, error); vprintf (error, argptr); va_end (argptr); printf ("\n"); exit (1); } /* 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 } /* COM_Parse Parse a token out of a string */ char * COM_Parse (char *data) { int c; int len = 0; com_token[0] = 0; if (!data) return NULL; // skip whitespace skipwhite: while ((c = *data) <= ' ') { if (c == 0) { com_eof = true; 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; } /* ============================================================================= 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 (char *check) { int i; for (i = 1; i < myargc; i++) { if (!strcasecmp (check, myargv[i])) return i; } return 0; } /* filelength */ int 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 (char *filename) { FILE *f; f = fopen (filename, "wb"); if (!f) Error ("Error opening %s: %s", filename, strerror (errno)); return f; } FILE * SafeOpenRead (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, void *buffer, int count) { if (fwrite (buffer, 1, count, f) != (size_t) count) Error ("File read failure"); } /* LoadFile */ int LoadFile (char *filename, void **bufferptr) { FILE *f; int length; void *buffer; f = SafeOpenRead (filename); length = filelength (f); buffer = malloc (length + 1); ((char *) buffer)[length] = 0; SafeRead (f, buffer, length); fclose (f); *bufferptr = buffer; return length; } /* ============================================================================ BYTE ORDER FUNCTIONS ============================================================================ */ #ifdef WORDS_BIGENDIAN 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; }