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OS/2 Shareware BBS: 9 Archive
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09-Archive.zip
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lha100bt.zip
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lha-1.00
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src
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util.c
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C/C++ Source or Header
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1992-04-04
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7KB
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351 lines
/*
* util.c - part of LHa for UNIX
* Feb 26 1992 modified by Masaru Oki
* Mar 4 1992 modified by Masaru Oki
* #ifndef USESTRCASECMP added.
* Mar 31 1992 modified by Masaru Oki
* #ifdef NOMEMSET added.
*/
#include <stdio.h>
#include <errno.h>
#ifdef sony_news
#include <sys/param.h>
#endif
#if defined(__STDC__) || defined(NEWSOS)
#include <stdlib.h>
#endif
#include "lharc.h"
#define BUFFERSIZE 2048
#ifndef NULL
#define NULL (char *)0
#endif
extern unsigned short crc;
extern int quiet;
long copyfile(f1, f2, size, crc_flg) /* return: size of source file */
FILE *f1;
FILE *f2;
long size;
int crc_flg; /* 0: no crc, 1: crc check, 2: extract, 3: append */
{
unsigned short xsize;
char *buf;
long rsize = 0;
if ((buf = (char *)malloc(BUFFERSIZE)) == NULL)
fatal_error("virtual memory exhausted.\n");
crc = 0;
if ((crc_flg == 2 || crc_flg) && text_mode)
init_code_cache();
while (size > 0) {
/* read */
if (crc_flg == 3 && text_mode) {
xsize = fread_txt(buf, BUFFERSIZE, f1);
if (xsize == 0)
break;
if (ferror(f1)) {
fatal_error("file read error\n");
}
}
else {
xsize = (size > BUFFERSIZE) ? BUFFERSIZE : size;
if (fread(buf, 1, xsize, f1) != xsize) {
fatal_error("file read error\n");
}
}
/* write */
if (f2) {
if (crc_flg == 2 && text_mode) {
if (fwrite_txt(buf, xsize, f2)) {
fatal_error("file write error\n");
}
}
else {
if (fwrite(buf, 1, xsize, f2) != xsize) {
fatal_error("file write error\n");
}
}
}
/* calculate crc */
if (crc_flg) {
calccrc(buf, xsize);
}
rsize += xsize;
if (crc_flg != 3 || !text_mode)
size -= xsize;
}
free(buf);
return rsize;
}
int
encode_stored_crc (ifp, ofp, size, original_size_var, write_size_var)
FILE *ifp, *ofp;
long size;
long *original_size_var;
long *write_size_var;
{
int save_quiet;
save_quiet = quiet;
quiet = 1;
size = copyfile (ifp,ofp,size,3);
*original_size_var = *write_size_var = size;
quiet = save_quiet;
return crc;
}
/***************************************
convert path delimiter
****************************************
returns *filename
***************************************/
unsigned char *
convdelim(path, delim)
unsigned char *path;
unsigned char delim;
{
unsigned char c;
unsigned char *p;
#ifdef MULTIBYTE_CHAR
int kflg;
kflg = 0;
#endif
for (p = path; (c = *p) != 0; p++) {
#ifdef MULTIBYTE_CHAR
if (kflg) {
kflg = 0;
} else if (iskanji(c)) {
kflg = 1;
} else
#endif
if (c == '\\' || c == DELIM || c == DELIM2)
{
*p = delim;
path = p + 1;
}
}
return path;
}
/* If TRUE, archive file name is msdos SFX file name. */
boolean
archive_is_msdos_sfx1 (name)
char *name;
{
int len = strlen (name);
return ((len >= 4) &&
(strucmp (".COM",name + len - 4) == 0 ||
strucmp (".EXE",name + len - 4) == 0)) ||
((len >= 2) &&
(strucmp (".x",name + len - 2) == 0));
}
/* skip SFX header */
boolean
skip_msdos_sfx1_code (fp)
FILE *fp;
{
unsigned char buffer[4096];
unsigned char *p, *q;
int n;
n = fread (buffer, sizeof (char), 4096, fp);
for (p = buffer + 2, q = buffer + n - 5; p < q; p ++)
{
/* found "-l??-" keyword (as METHOD type string) */
if (p[0] == '-' && p[1] == 'l' && p[4] == '-')
{
/* size and checksum validate check */
if (p[-2] > 20 && p[-1] == calc_sum (p, p[-2]))
{
fseek (fp, ((p - 2) - buffer) - n, SEEK_CUR);
return TRUE;
}
}
}
fseek (fp, -n, SEEK_CUR);
return FALSE;
}
/*
* strdup(3)
*/
#ifdef NOSTRDUP
char *strdup ( buf )
char *buf;
{
char *p;
if ((p = (char *)malloc(strlen(buf) + 1)) == NULL) return NULL;
strcpy( p, buf );
return p;
}
#endif
/*
* memmove( char *dst , char *src , size_t cnt )
*/
#if defined(NOBSTRING) && !defined(__STDC__)
void *
memmove( dst , src , cnt )
register char *dst , *src;
register int cnt;
{
if ( dst == src ) return dst;
if ( src > dst )
{
while ( --cnt >=0 ) *dst++ = *src++;
}
else
{
dst += cnt; src += cnt;
while ( --cnt >=0 ) *--dst = *--src;
}
return dst;
}
#endif
/* rename - change the name of file
* 91.11.02 by Tomohiro Ishikawa (ishikawa@gaia.cow.melco.CO.JP)
* 92.01.20 little modified (added #ifdef) by Masaru Oki
* 92.01.28 added mkdir() and rmdir() by Tomohiro Ishikawa
*/
#if defined(NOFTRUNCATE) && !defined(_MINIX)
int
rename(from, to)
char *from, *to;
{
struct stat s1,s2;
extern int errno;
if (stat(from, &s1) < 0)
return(-1);
/* is 'FROM' file a directory? */
if ((s1.st_mode & S_IFMT) == S_IFDIR){
errno = ENOTDIR;
return(-1);
}
if (stat(to, &s2) >= 0) { /* 'TO' exists! */
/* is 'TO' file a directory? */
if ((s2.st_mode & S_IFMT) == S_IFDIR){
errno=EISDIR;
return(-1);
}
if (unlink(to) < 0)
return(-1);
}
if (link(from, to) < 0)
return(-1);
if (unlink(from) < 0)
return(-1);
return(0);
}
#endif /* NOFTRUNCATE */
#ifdef NOMKDIR
#ifndef MKDIRPATH
#define MKDIRPATH "/bin/mkdir"
#endif
#ifndef RMDIRPATH
#define RMDIRPATH "/bin/rmdir"
#endif
int
rmdir(path)
char *path;
{
int stat,rtn=0;
char *cmdname;
if ( (cmdname=(char *)malloc(strlen(RMDIRPATH)+1+strlen(path)+1))
== 0)
return(-1);
strcpy(cmdname,RMDIRPATH);
*(cmdname+strlen(RMDIRPATH))=' ';
strcpy(cmdname+strlen(RMDIRPATH)+1,path);
if ((stat = system(cmdname))<0)
rtn=-1; /* fork or exec error */
else if(stat){ /* RMDIR command error */
errno = EIO;
rtn=-1;
}
free(cmdname);
return(rtn);
}
int
mkdir(path,mode)
char *path;
int mode;
{
int child, stat;
char *cmdname,*cmdpath=MKDIRPATH;
if ( (cmdname=(char *)strrchr(cmdpath,'/'))==(char *)0)
cmdname=cmdpath;
if ((child = fork())<0)
return(-1); /* fork error */
else if(child) { /* parent process */
while (child != wait(&stat)) /* ignore signals */
continue;
}
else{ /* child process */
int maskvalue;
maskvalue = umask(0); /* get current umask() value */
umask(maskvalue | (0777 & ~mode)); /* set it! */
execl(cmdpath, cmdname, path, (char *)0);
/* never come here except execl is error */
return(-1);
}
if (stat != 0) {
errno = EIO; /* cannot get error num. */
return(-1);
}
return(0);
}
#endif
/*
* strucmp
* modified: Oct 29 1991 by Masaru Oki
*/
#ifndef USESTRCASECMP
static int my_toupper(n)
register int n;
{
if(n >= 'a' && n <= 'z') return n & (~('a'-'A'));
return n;
}
int strucmp(s, t)
register char *s, *t;
{
while (my_toupper(*s++) == my_toupper(*t++))
if ( !*s || !*t ) break;
if ( !*s && !*t ) return 0;
return 1;
}
#endif
#ifdef NOMEMSET
/* Public Domain memset(3) */
char *
memset (s, c, n)
char *s;
int c, n;
{
char *p = s;
while(n--) *p++ = (char)c;
return s;
}
#endif