// cmdlib.c (mostly borrowed from the Q2 source #ifdef _WIN32 #define WIN32_LEAN_AND_MEAN #include #include #endif #include "cmdlib.h" #include "i_system.h" #include #include #include "m_alloc.h" #define PATHSEPERATOR '/' char com_token[8192]; BOOL com_eof; /* progdir will hold the path up to the game directory, including the slash f:\quake\ /raid/quake/ gamedir will hold progdir + the game directory (id1, id2, etc) */ char progdir[1024]; void FixPathSeperator (char *path) { char *c; c = path; while ( (c = strchr (c, '\\')) ) *c++ = PATHSEPERATOR; } char *copystring(const char *s) { char *b; b = Malloc(strlen(s)+1); strcpy (b, s); return b; } /* ============== 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 = 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==':' || /*[RH]*/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==':' || c=='=') break; } while (c>32); com_token[len] = 0; return data; } /* ============================================================================= MISC FUNCTIONS ============================================================================= */ /* ================ 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; } /* ============== FileExists ============== */ BOOL FileExists (char *filename) { FILE *f; // [RH] Empty filenames are never there if (*filename == 0) return false; f = fopen (filename, "r"); if (!f) return false; fclose (f); return true; } void DefaultExtension (char *path, char *extension) { char *src; // // if path doesnt have a .EXT, append extension // (extension should include the .) // src = path + strlen(path) - 1; while (*src != PATHSEPERATOR && src != path) { if (*src == '.') return; // it has an extension src--; } strcat (path, extension); } /* ==================== Extract file parts ==================== */ // FIXME: should include the slash, otherwise // backing to an empty path will be wrong when appending a slash void ExtractFilePath (char *path, char *dest) { 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 (char *path, char *dest) { char *src; src = path + strlen(path) - 1; // // back up until a / or the start // while (src != path && *(src-1) != PATHSEPERATOR) src--; while (*src && *src != '.') { *dest++ = *src++; } *dest = 0; } /* ============== ParseNum / ParseHex ============== */ int ParseHex (char *hex) { 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 { Printf ("Bad hex number: %s\n",hex); return 0; } str++; } return num; } int ParseNum (char *str) { if (str[0] == '$') return ParseHex (str+1); if (str[0] == '0' && str[1] == 'x') return ParseHex (str+2); return atol (str); } // [RH] Returns true if the specified string is a valid decimal number BOOL IsNum (char *str) { BOOL result = true; while (*str) { if (((*str < '0') || (*str > '9')) && (*str != '-')) { result = false; break; } str++; } return result; } //======================================================= /* // 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; } */ //=============================================================================