612 lines
8.0 KiB
C
612 lines
8.0 KiB
C
// cmdlib.c
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#include "cmdlib.h"
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#define PATHSEPERATOR '/'
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/*
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================
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I_FloatTime
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================
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*/
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double I_FloatTime (void)
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{
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struct timeval tp;
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struct timezone tzp;
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static int secbase;
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gettimeofday(&tp, &tzp);
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if (!secbase)
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{
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secbase = tp.tv_sec;
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return tp.tv_usec/1000000.0;
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}
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return (tp.tv_sec - secbase) + tp.tv_usec/1000000.0;
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}
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char com_token[1024];
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boolean com_eof;
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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 *COM_Parse (char *data)
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{
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int c;
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int len;
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com_eof = false;
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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 = true;
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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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=
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= filelength
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=
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================
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*/
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int filelength (int handle)
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{
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struct stat fileinfo;
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if (fstat (handle,&fileinfo) == -1)
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{
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fprintf (stderr,"Error fstating");
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exit (1);
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}
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return fileinfo.st_size;
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}
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int tell (int handle)
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{
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return lseek (handle, 0, L_INCR);
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}
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char *strupr (char *start)
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{
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char *in;
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in = start;
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while (*in)
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{
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*in = toupper(*in);
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in++;
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}
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return start;
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}
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char *strlower (char *start)
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{
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char *in;
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in = start;
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while (*in)
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{
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*in = tolower(*in);
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in++;
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}
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return start;
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}
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char *getcwd (char *path, int length)
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{
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return getwd(path);
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}
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/* globals for command line args */
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extern int NXArgc;
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extern char **NXArgv;
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#define myargc NXArgc
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#define myargv NXArgv
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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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=
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= CheckParm
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=
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= Checks for the given parameter in the program's command line arguments
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=
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= Returns the argument number (1 to argc-1) or 0 if not present
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=
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=================
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*/
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int CheckParm (char *check)
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{
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int i;
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for (i = 1;i<myargc;i++)
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{
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if ( !stricmp(check, myargv[i]) )
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return i;
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}
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return 0;
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}
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int SafeOpenWrite (char *filename)
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{
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int handle;
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umask (0);
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handle = open(filename,O_RDWR | O_CREAT | O_TRUNC
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, 0666);
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if (handle == -1)
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Error ("Error opening %s: %s",filename,strerror(errno));
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return handle;
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}
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int SafeOpenRead (char *filename)
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{
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int handle;
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handle = open(filename,O_RDONLY);
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if (handle == -1)
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Error ("Error opening %s: %s",filename,strerror(errno));
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return handle;
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}
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void SafeRead (int handle, void *buffer, long count)
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{
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int iocount;
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iocount = read (handle,buffer,count);
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if (iocount != count)
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Error ("File read failure");
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}
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void SafeWrite (int handle, void *buffer, long count)
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{
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int iocount;
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iocount = write (handle,buffer,count);
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if (iocount != count)
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Error ("File write failure");
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}
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void *SafeMalloc (long size)
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{
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void *ptr;
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ptr = malloc (size);
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if (!ptr)
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Error ("Malloc failure for %lu bytes",size);
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return ptr;
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}
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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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= appends a 0 byte
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==============
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*/
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long LoadFile (char *filename, void **bufferptr)
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{
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int handle;
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long length;
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void *buffer;
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handle = SafeOpenRead (filename);
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length = filelength (handle);
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buffer = SafeMalloc (length+1);
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((char *)buffer)[length] = 0;
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SafeRead (handle, buffer, length);
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close (handle);
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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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=
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= SaveFile
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=
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==============
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*/
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void SaveFile (char *filename, void *buffer, long count)
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{
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int handle;
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handle = SafeOpenWrite (filename);
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SafeWrite (handle, buffer, count);
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close (handle);
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}
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void DefaultExtension (char *path, char *extension)
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{
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char *src;
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//
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// if path doesn't have a .EXT, append extension
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// (extension should include the .)
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//
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src = path + strlen(path) - 1;
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while (*src != PATHSEPERATOR && src != path)
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{
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if (*src == '.')
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return; // it has an extension
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src--;
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}
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strcat (path, extension);
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}
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void DefaultPath (char *path, 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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void StripExtension (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] != '.')
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length--;
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if (length)
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path[length] = 0;
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}
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/*
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====================
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=
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= Extract file parts
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=
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====================
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*/
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void ExtractFilePath (char *path, char *dest)
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{
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char *src;
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src = path + strlen(path) - 1;
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//
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// back up until a \ or the start
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//
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while (src != path && *(src-1) != PATHSEPERATOR)
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src--;
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memcpy (dest, path, src-path);
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dest[src-path] = 0;
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}
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void ExtractFileBase (char *path, char *dest)
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{
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char *src;
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src = path + strlen(path) - 1;
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//
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// back up until a \ or the start
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//
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while (src != path && *(src-1) != PATHSEPERATOR)
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src--;
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while (*src && *src != '.')
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{
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*dest++ = *src++;
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}
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*dest = 0;
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}
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void ExtractFileExtension (char *path, char *dest)
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{
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char *src;
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src = path + strlen(path) - 1;
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//
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// back up until a . or the start
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//
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while (src != path && *(src-1) != '.')
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src--;
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if (src == path)
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{
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*dest = 0; // no extension
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return;
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}
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strcpy (dest,src);
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}
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/*
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==============
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=
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= ParseNum / ParseHex
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=
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==============
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*/
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long ParseHex (char *hex)
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{
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char *str;
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long num;
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num = 0;
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str = hex;
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while (*str)
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{
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num <<= 4;
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if (*str >= '0' && *str <= '9')
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num += *str-'0';
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else if (*str >= 'a' && *str <= 'f')
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num += 10 + *str-'a';
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else if (*str >= 'A' && *str <= 'F')
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num += 10 + *str-'A';
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else
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Error ("Bad hex number: %s",hex);
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str++;
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}
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return num;
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}
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long ParseNum (char *str)
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{
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if (str[0] == '$')
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return ParseHex (str+1);
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if (str[0] == '0' && str[1] == 'x')
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return ParseHex (str+2);
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return atol (str);
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}
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int GetKey (void)
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{
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return getchar ();
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}
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/*
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============================================================================
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BYTE ORDER FUNCTIONS
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============================================================================
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*/
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#ifdef __BIG_ENDIAN__
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short LittleShort (short l)
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{
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byte b1,b2;
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b1 = l&255;
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b2 = (l>>8)&255;
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return (b1<<8) + b2;
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}
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short BigShort (short l)
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{
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return l;
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}
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long LittleLong (long l)
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{
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byte b1,b2,b3,b4;
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b1 = l&255;
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b2 = (l>>8)&255;
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b3 = (l>>16)&255;
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b4 = (l>>24)&255;
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return ((long)b1<<24) + ((long)b2<<16) + ((long)b3<<8) + b4;
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}
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long BigLong (long l)
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{
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return l;
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}
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float LittleFloat (float l)
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{
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union {byte b[4]; float f;} in, out;
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in.f = l;
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out.b[0] = in.b[3];
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out.b[1] = in.b[2];
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out.b[2] = in.b[1];
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out.b[3] = in.b[0];
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return out.f;
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}
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float BigFloat (float l)
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{
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return l;
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}
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#else
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short BigShort (short l)
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{
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byte b1,b2;
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b1 = l&255;
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b2 = (l>>8)&255;
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return (b1<<8) + b2;
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}
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short LittleShort (short l)
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{
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return l;
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}
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long BigLong (long l)
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{
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byte b1,b2,b3,b4;
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b1 = l&255;
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b2 = (l>>8)&255;
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b3 = (l>>16)&255;
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b4 = (l>>24)&255;
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return ((long)b1<<24) + ((long)b2<<16) + ((long)b3<<8) + b4;
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}
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long LittleLong (long l)
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{
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return l;
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}
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float BigFloat (float l)
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{
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union {byte b[4]; float f;} in, out;
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in.f = l;
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out.b[0] = in.b[3];
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out.b[1] = in.b[2];
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out.b[2] = in.b[1];
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out.b[3] = in.b[0];
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return out.f;
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}
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float LittleFloat (float l)
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{
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return l;
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}
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#endif
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