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/* Copyright (C) 1996-1997 Id Software, Inc.
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 the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
See file, 'COPYING', for details.
*/
#include <common/cmdlib.hh>
#include <common/log.hh>
#include <common/threads.hh>
#include <sys/types.h>
#include <sys/stat.h>
#ifdef WIN32
#include <direct.h>
#include <windows.h>
#endif
#ifdef LINUX
#include <sys/time.h>
#include <unistd.h>
#include <string.h>
#endif
#include <stdint.h>
#include <string>
#define PATHSEPERATOR '/'
/* set these before calling CheckParm */
int myargc;
char **myargv;
char com_token[1024];
qboolean com_eof;
qboolean archive;
char archivedir[1024];
/*
* =================
* Error
* For abnormal program terminations
* =================
*/
[[noreturn]] void
Error(const char *error, ...)
{
va_list argptr;
/* Using lockless prints so we can error out while holding the lock */
InterruptThreadProgress__();
logprint_locked__("************ ERROR ************\n");
va_start(argptr, error);
logvprint(error, argptr);
va_end(argptr);
logprint_locked__("\n");
exit(1);
}
/*
* qdir will hold the path up to the base directory (basedir), including the
* slash:
* c:\quake\
* /usr/local/games/quake/
*
* gamedir will hold qdir + the game directory (id1, hipnotic, etc).
* SetQdirFromPath requires an input containing both the basedir and the
* gamedir:
* c:\quake\id1\somefile.dat
* /usr/local/games/quake/id1/somefile.dat
* or similar partials:
* id1\somefile.dat
* quake/id1/somefile.dat
*
*/
char qdir[1024]; // c:/Quake/, c:/Hexen II/ etc.
char gamedir[1024]; // c:/Quake/mymod/
char basedir[1024]; //mxd. c:/Quake/ID1/, c:/Quake 2/BASEQ2/ etc.
void //mxd
string_replaceall(std::string& str, const std::string& from, const std::string& to)
{
if (from.empty()) return;
size_t start_pos = 0;
while ((start_pos = str.find(from, start_pos)) != std::string::npos) {
str.replace(start_pos, from.length(), to);
start_pos += to.length(); // In case 'to' contains 'from', like replacing 'x' with 'yx'
}
}
bool //mxd
string_iequals(const std::string& a, const std::string& b)
{
const auto sz = a.size();
if (b.size() != sz) return false;
for (unsigned int i = 0; i < sz; ++i)
if (tolower(a[i]) != tolower(b[i]))
return false;
return true;
}
int //mxd. Returns offset in path to the next updir, sets dirname to the name of updir
up_dir_pos(const std::string& path, std::string& dirname)
{
const int pos = path.rfind(PATHSEPERATOR);
if (pos > -1) dirname = path.substr(pos + 1, path.size() - pos - 1);
return pos;
}
int //mxd. Finds dirname in path and returns offset to it
find_dir(const std::string& path, const std::string& dirname)
{
std::string cur_path { path };
std::string cur_dir {};
int pos = 0;
while (pos != -1) {
pos = up_dir_pos(cur_path, cur_dir);
if (pos > -1) {
if (string_iequals(cur_dir, dirname)) return pos;
cur_path = cur_path.substr(0, pos);
}
}
return pos;
}
bool //mxd
dir_exists(const char *path)
{
struct stat buf{};
return (stat(path, &buf) == 0 && buf.st_mode & S_IFDIR);
}
/**
* It's possible to compile quake 1/hexen 2 maps without a qdir
*/
static void
ClearQdir(void)
{
qdir[0] = '\0';
gamedir[0] = '\0';
basedir[0] = '\0';
}
void //mxd. Expects the path to contain "maps" folder
SetQdirFromPath(const char *basedirname, const char *path)
{
char temp[1024];
if (!(path[0] == PATHSEPERATOR || path[0] == '\\' || path[1] == ':')) {
// path is partial
Q_getwd(temp);
strcat(temp, "/");
strcat(temp, path);
path = temp;
}
const std::string basedir_s { basedirname };
std::string path_s{ path };
string_replaceall(path_s, "\\", "/");
int pos = find_dir(path_s, "maps");
if (pos == -1) {
logprint("SetQdirFromPath: no \"maps\" in '%s'", path);
ClearQdir();
return;
}
// Expect mod folder to be above "maps" folder
path_s = path_s.substr(0, pos);
strcpy(gamedir, (path_s + PATHSEPERATOR).c_str());
logprint("gamedir: %s\n", gamedir);
// See if it's the main game data folder (ID1 / baseq2 / data1 etc.)
std::string gamename_s;
pos = up_dir_pos(path_s, gamename_s);
if (pos == -1) {
logprint("SetQdirFromPath: invalid path: '%s'", path);
ClearQdir();
return;
}
// Not the main game data folder...
if (!string_iequals(gamename_s, basedir_s)) {
pos = 0;
while (pos != -1) {
const std::string checkpath_s = path_s + PATHSEPERATOR + basedir_s;
if (dir_exists(checkpath_s.c_str())) {
// Set basedir
strcpy(basedir, (checkpath_s + PATHSEPERATOR).c_str());
logprint("basedir: %s\n", basedir);
break;
}
pos = up_dir_pos(path_s, gamename_s);
path_s = path_s.substr(0, pos);
}
if (pos == -1) {
logprint("SetQ2dirFromPath: failed to find %s in '%s'\n", basedir, path);
ClearQdir();
return;
}
// qdir is already in path_s
} else {
// Set basedir
strcpy(basedir, (path_s + PATHSEPERATOR).c_str());
logprint("basedir: %s\n", basedir);
// qdir shound be 1 level above basedir
pos = up_dir_pos(path_s, gamename_s);
path_s = path_s.substr(0, pos);
}
// Store qdir...
strcpy(qdir, (path_s + PATHSEPERATOR).c_str());
logprint("qdir: %s\n", qdir);
}
char *
ExpandPath(char *path)
{
static char full[1024];
if (!qdir[0])
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);
Q_CopyFile(expanded, archivename);
}
return expanded;
}
char *
copystring(const char *s)
{
char *b;
b = static_cast<char *>(malloc(strlen(s) + 1));
strcpy(b, s);
return b;
}
/*
* ================
* I_FloatTime
* ================
*/
double
I_FloatTime(void)
{
#ifdef WIN32
FILETIME ft;
uint64_t hundred_ns;
GetSystemTimeAsFileTime(&ft);
hundred_ns = (((uint64_t)ft.dwHighDateTime) << 32) + ((uint64_t)ft.dwLowDateTime);
return (double)hundred_ns / 10000000.0;
#else
struct timeval tv;
gettimeofday(&tv, NULL);
return (double)tv.tv_sec + (tv.tv_usec / 1000000.0);
#endif
}
void
Q_getwd(char *out)
{
#ifdef WIN32
_getcwd(out, 256);
strcat(out, "\\");
#else
#ifdef LINUX
char *pwd;
int len;
pwd = getenv("PWD");
if (!pwd)
Error("Couldn't get working directory - "
"PWD not set in environment\n");
len = strlen(pwd);
if (len > 255)
Error("Not enough space to hold working dir\n");
strcpy(out, pwd);
#else
getwd(out);
#endif
#endif
}
void
Q_mkdir(const 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(const 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
* ==============
*/
const char *
COM_Parse(const 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 // (double forward slash) comments */
if (c == '/' && data[1] == '/') {
while (*data && *data != '\n')
data++;
goto skipwhite;
}
/* skip C-style comments */
if (c == '/' && data[1] == '*') {
data += 2;
while (*data && !(*data == '*' && data[1] == '/'))
data++;
if (*data)
data += 2;
goto skipwhite;
}
/* handle quoted strings specially */
if (c == '\"') {
data++;
do {
c = *data;
if (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(const char *s1, const char *s2, int n)
{
int c1, c2;
while (1) {
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 */
}
if (!c1)
return 0; /* strings are equal */
}
return -1;
}
int
Q_strcasecmp(const char *s1, const char *s2)
{
return Q_strncasecmp(s1, s2, 99999);
}
char *
Q_strupr(char *start)
{
char *in;
in = start;
while (*in) {
*in = toupper(*in);
in++;
}
return start;
}
char *
Q_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(const char *check)
{
int i;
for (i = 1; i < myargc; i++) {
if (!Q_strcasecmp(check, myargv[i]))
return i;
}
return 0;
}
/*
* ===========
* filelength
* ===========
*/
int
Sys_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(const char *filename)
{
FILE *f;
f = fopen(filename, "wb");
if (!f)
Error("Error opening %s: %s", filename, strerror(errno));
return f;
}
FILE *
SafeOpenRead(const 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, const void *buffer, int count)
{
const size_t written = fwrite(buffer, 1, count, f);
if (written != (size_t) count)
Error("File write failure");
}
typedef struct {
char magic[4];
unsigned int tableofs;
unsigned int numfiles;
} pakheader_t;
typedef struct {
char name[56];
unsigned int offset;
unsigned int length;
} pakfile_t;
/*
* ==============
* LoadFilePak
* reads a file directly out of a pak, to make re-lighting friendlier
* writes to the filename, stripping the pak part of the name
* ==============
*/
int
LoadFilePak(char *filename, void *destptr)
{
uint8_t **bufferptr = static_cast<uint8_t **>(destptr);
uint8_t *buffer;
FILE *file;
int length;
char *e = NULL;
file = fopen(filename, "rb");
if (!file)
{
e = filename + strlen(filename);
for( ; e>filename ; )
{
while(e > filename)
if (*--e == '/')
break;
if (*e == '/')
{
*e = 0;
file = fopen(filename, "rb");
if (file)
{
uint8_t **bufferptr = static_cast<uint8_t **>(destptr);
pakheader_t header;
unsigned int i;
const char *innerfile = e+1;
length = -1;
SafeRead(file, &header, sizeof(header));
header.numfiles = LittleLong(header.numfiles) / sizeof(pakfile_t);
header.tableofs = LittleLong(header.tableofs);
if (!strncmp(header.magic, "PACK", 4))
{
pakfile_t *files = static_cast<pakfile_t *>(malloc(header.numfiles * sizeof(*files)));
// printf("%s: %u files\n", pakfilename, header.numfiles);
fseek(file, header.tableofs, SEEK_SET);
SafeRead(file, files, header.numfiles * sizeof(*files));
for (i = 0; i < header.numfiles; i++)
{
if (!strcmp(files[i].name, innerfile))
{
fseek(file, files[i].offset, SEEK_SET);
*bufferptr = static_cast<uint8_t*>(malloc(files[i].length + 1));
SafeRead(file, *bufferptr, files[i].length);
length = files[i].length;
break;
}
}
free(files);
}
fclose(file);
if (length < 0)
Error("Unable to find %s inside %s", innerfile, filename);
while(e > filename)
if (*--e == '/')
{
strcpy(e+1, innerfile);
return length;
}
strcpy(filename, innerfile);
return length;
}
*e = '/';
}
}
Error("Error opening %s: %s", filename, strerror(errno));
}
file = SafeOpenRead(filename);
length = Sys_filelength(file);
buffer = *bufferptr = static_cast<uint8_t*>(malloc(length + 1));
if (!buffer)
Error("%s: allocation of %i bytes failed.", __func__, length);
SafeRead(file, buffer, length);
fclose(file);
buffer[length] = 0;
return length;
}
/*
* ==============
* LoadFile
* ==============
*/
int
LoadFile(const char *filename, void *destptr)
{
uint8_t **bufferptr = static_cast<uint8_t**>(destptr);
uint8_t *buffer;
FILE *file;
int length;
file = SafeOpenRead(filename);
length = Sys_filelength(file);
buffer = *bufferptr = static_cast<uint8_t*>(malloc(length + 1));
if (!buffer)
Error("%s: allocation of %i bytes failed.", __func__, length);
SafeRead(file, buffer, length);
fclose(file);
buffer[length] = 0;
return length;
}
/*
* ==============
* SaveFile
* ==============
*/
void
SaveFile(const char *filename, const void *buffer, int count)
{
FILE *f;
f = SafeOpenWrite(filename);
SafeWrite(f, buffer, count);
fclose(f);
}
void
DefaultExtension(char *path, const char *extension)
{
char *src;
/* if path doesn't 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, const char *basepath)
{
char temp[128];
if (path[0] == PATHSEPERATOR)
return; /* absolute path location */
strcpy(temp, path);
strcpy(path, basepath);
strcat(path, temp);
}
std::string
StrippedFilename(const std::string& path)
{
const size_t lastSlash = path.rfind(PATHSEPERATOR);
if (lastSlash == std::string::npos) {
return std::string();
}
// excludes the trailing slash
return path.substr(0, lastSlash);
}
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;
}
std::string
StrippedExtension(const std::string& path) {
std::string result = path;
int length;
length = static_cast<int>(path.size()) - 1;
while (length > 0 && path[length] != '.') {
length--;
if (path[length] == '/')
return path; /* no extension */
}
if (length)
result = result.substr(0, static_cast<size_t>(length - 1));
return result;
}
int
IsAbsolutePath(const char *path)
{
return path[0] == PATHSEPERATOR || (isalpha(path[0]) && path[1] == ':');
}
/*
* ====================
* Extract file parts
* ====================
*/
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) != PATHSEPERATOR)
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)
{
uint8_t b1, b2;
b1 = l & 255;
b2 = (l >> 8) & 255;
return (b1 << 8) + b2;
}
short
BigShort(short l)
{
return l;
}
int
LittleLong(int l)
{
uint8_t 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 {
uint8_t 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 /* must be little endian */
short
BigShort(short l)
{
uint8_t b1, b2;
b1 = l & 255;
b2 = (l >> 8) & 255;
return (b1 << 8) + b2;
}
short
LittleShort(short l)
{
return l;
}
int
BigLong(int l)
{
uint8_t 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 {
uint8_t 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, uint8_t data)
{
*crcvalue = (*crcvalue << 8) ^ crctable[(*crcvalue >> 8) ^ data];
}
unsigned short
CRC_Value(unsigned short crcvalue)
{
return crcvalue ^ CRC_XOR_VALUE;
}
unsigned short CRC_Block (const unsigned char *start, int count)
{
unsigned short crc;
CRC_Init (&crc);
while (count--)
crc = (crc << 8) ^ crctable[(crc >> 8) ^ *start++];
return crc;
}
/* ========================================================================= */
/*
* ============
* CreatePath
* ============
*/
void
CreatePath(char *path)
{
char *ofs, c;
for (ofs = path + 1; *ofs; ofs++) {
c = *ofs;
if (c == '/' || c == '\\') { /* create the directory */
*ofs = 0;
Q_mkdir(path);
*ofs = c;
}
}
}
/*
* ============
* Q_CopyFile
* Used to archive source files
*============
*/
void
Q_CopyFile(const char *from, char *to)
{
void *buffer;
int length;
length = LoadFile(from, &buffer);
CreatePath(to);
SaveFile(to, buffer, length);
free(buffer);
}
// from QuakeSpasm
/* platform dependant (v)snprintf function names: */
#if defined(_WIN32)
#define snprintf_func _snprintf
#define vsnprintf_func _vsnprintf
#else
#define snprintf_func snprintf
#define vsnprintf_func vsnprintf
#endif
int q_vsnprintf(char *str, size_t size, const char *format, va_list args)
{
int ret;
ret = vsnprintf_func(str, size, format, args);
if (ret < 0)
ret = (int)size;
if (size == 0) /* no buffer */
return ret;
if ((size_t)ret >= size)
str[size - 1] = '\0';
return ret;
}
int q_snprintf(char *str, size_t size, const char *format, ...)
{
int ret;
va_list argptr;
va_start(argptr, format);
ret = q_vsnprintf(str, size, format, argptr);
va_end(argptr);
return ret;
}
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