PC PowerPlay 22/PCPP #22.iso/Quake2/q2source_12_11/utils3/common/cmdlib.c

C/C++ Source or Header | 1997-11-15 | 16.6 KB | 1,034 lines

// cmdlib.c

#include "cmdlib.h"
#include <sys/types.h>
#include <sys/stat.h>

#ifdef WIN32
#include <direct.h>
#endif

#ifdef NeXT
#include <libc.h>
#endif

#define    BASEDIRNAME    "quake2"
#define PATHSEPERATOR   '/'

// set these before calling CheckParm
int myargc;
char **myargv;

char        com_token[1024];
qboolean    com_eof;

qboolean        archive;
char            archivedir[1024];


/*
===================
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 (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 (char *error, ...)
{
    va_list argptr;

    printf ("\n************ ERROR ************\n");

    va_start (argptr,error);
    vprintf (error,argptr);
    va_end (argptr);
    printf ("\n");

    exit (1);
}
#endif

// only printf if in verbose mode
qboolean verbose = false;
void qprintf (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];

void SetQdirFromPath (char *path)
{
    char    temp[1024];
    char    *c;
    int        len;

    if (!(path[0] == '/' || path[0] == '\\' || path[1] == ':'))
    {    // path is partial
        Q_getwd (temp);
        strcat (temp, path);
        path = temp;
    }

    // search for "quake2" in path

    len = strlen(BASEDIRNAME);
    for (c=path+strlen(path)-1 ; c != path ; c--)
        if (!Q_strncasecmp (c, BASEDIRNAME, len))
        {
            strncpy (qdir, path, c+len+1-path);
            qprintf ("qdir: %s\n", qdir);
            c += len+1;
            while (*c)
            {
                if (*c == '/' || *c == '\\')
                {
                    strncpy (gamedir, path, c+1-path);
                    qprintf ("gamedir: %s\n", gamedir);
                    return;
                }
                c++;
            }
            Error ("No gamedir in %s", path);
            return;
        }
    Error ("SetQdirFromPath: no '%s' in %s", BASEDIRNAME, path);
}

char *ExpandArg (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 (char *path)
{
    static char full[1024];
    if (!qdir)
        Error ("ExpandPath called without qdir set");
    if (path[0] == '/' || path[0] == '\\' || path[1] == ':')
        return path;
    sprintf (full, "%s%s", qdir, path);
    return full;
}

char *ExpandPathAndArchive (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(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)
{
#ifdef WIN32
   _getcwd (out, 256);
   strcat (out, "\\");
#else
   getwd (out);
   strcat (out, "/");
#endif
}


void Q_mkdir (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 (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 = 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;
}


int Q_strncasecmp (char *s1, 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_strcasecmp (char *s1, 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 (char *check)
{
    int             i;

    for (i = 1;i<myargc;i++)
    {
        if ( !Q_strcasecmp(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 (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 write failure");
}


/*
==============
FileExists
==============
*/
qboolean    FileExists (char *filename)
{
    FILE    *f;

    f = fopen (filename, "r");
    if (!f)
        return false;
    fclose (f);
    return true;
}

/*
==============
LoadFile
==============
*/
int    LoadFile (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;
}


/*
==============
TryLoadFile

Allows failure
==============
*/
int    TryLoadFile (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 (char *filename, void *buffer, int count)
{
    FILE    *f;

    f = SafeOpenWrite (filename);
    SafeWrite (f, buffer, count);
    fclose (f);
}



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);
}


void DefaultPath (char *path, 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 (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;
}

void ExtractFileExtension (char *path, char *dest)
{
    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 (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
            Error ("Bad hex number: %s",hex);
        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);
}



/*
============================================================================

                    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 (char *path)
{
    char    *ofs, c;

    if (path[1] == ':')
        path += 2;

    for (ofs = path+1 ; *ofs ; ofs++)
    {
        c = *ofs;
        if (c == '/' || c == '\\')
        {    // create the directory
            *ofs = 0;
            Q_mkdir (path);
            *ofs = c;
        }
    }
}


/*
============
QCopyFile

  Used to archive source files
============
*/
void QCopyFile (char *from, char *to)
{
    void    *buffer;
    int        length;

    length = LoadFile (from, &buffer);
    CreatePath (to);
    SaveFile (to, buffer, length);
    free (buffer);
}