kolibrios/programs/fs/unzip60/acorn/riscos.c

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/*
Copyright (c) 1990-2002 Info-ZIP. All rights reserved.
See the accompanying file LICENSE, version 2000-Apr-09 or later
(the contents of which are also included in unzip.h) for terms of use.
If, for some reason, all these files are missing, the Info-ZIP license
also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html
*/
/* riscos.c */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* #define NO_UNZIPH_STUFF */
#define UNZIP_INTERNAL
#include "unzip.h"
#include "riscos.h"
#define MAXEXT 16
char *exts2swap = NULL; /* Extensions to swap (actually, directory names) */
int stat(char *filename,struct stat *res)
{
int attr; /* object attributes */
unsigned int load; /* load address */
unsigned int exec; /* exec address */
int type; /* type: 0 not found, 1 file, 2 dir, 3 image */
if (!res)
return -1;
if (SWI_OS_File_5(filename,&type,&load,&exec,(int *)&res->st_size,&attr)!=NULL)
return -1;
if (type==0)
return -1;
res->st_dev=0;
res->st_ino=0;
res->st_nlink=0;
res->st_uid=1;
res->st_gid=1;
res->st_rdev=0;
res->st_blksize=1024;
res->st_mode = ((attr & 0001) << 8) | ((attr & 0002) << 6) |
((attr & 0020) >> 2) | ((attr & 0040) >> 4);
switch (type) {
case 1: /* File */
res->st_mode |= S_IFREG;
break;
case 2: /* Directory */
res->st_mode |= S_IFDIR | 0700;
break;
case 3: /* Image file */
if (uO.scanimage)
res->st_mode |= S_IFDIR | 0700;
else
res->st_mode |= S_IFREG;
break;
}
if ((((unsigned int) load) >> 20) == 0xfff) { /* date stamped file */
register unsigned int t1, t2, tc;
t1 = (unsigned int) (exec);
t2 = (unsigned int) (load & 0xff);
tc = 0x6e996a00U;
if (t1 < tc)
t2--;
t1 -= tc;
t2 -= 0x33; /* 00:00:00 Jan. 1 1970 = 0x336e996a00 */
t1 = (t1 / 100) + (t2 * 42949673U); /* 0x100000000 / 100 = 42949672.96 */
t1 -= (t2 / 25); /* compensate for .04 error */
res->st_atime = res->st_mtime = res->st_ctime = t1;
}
else
res->st_atime = res->st_mtime = res->st_ctime = 0;
return 0;
}
#ifndef SFX
DIR *opendir(char *dirname)
{
DIR *thisdir;
int type;
int attr;
os_error *er;
thisdir=(DIR *)malloc(sizeof(DIR));
if (thisdir==NULL)
return NULL;
thisdir->dirname=(char *)malloc(strlen(dirname)+1);
if (thisdir->dirname==NULL) {
free(thisdir);
return NULL;
}
strcpy(thisdir->dirname,dirname);
if (thisdir->dirname[strlen(thisdir->dirname)-1]=='.')
thisdir->dirname[strlen(thisdir->dirname)-1]=0;
if (er=SWI_OS_File_5(thisdir->dirname,&type,NULL,NULL,NULL,&attr),er!=NULL ||
type<=1 || (type==3 && !uO.scanimage))
{
free(thisdir->dirname);
free(thisdir);
return NULL;
}
thisdir->buf=malloc(DIR_BUFSIZE);
if (thisdir->buf==NULL) {
free(thisdir->dirname);
free(thisdir);
return NULL;
}
thisdir->size=DIR_BUFSIZE;
thisdir->offset=0;
thisdir->read=0;
return thisdir;
}
struct dirent *readdir(DIR *d)
{
static struct dirent dent;
if (d->read==0) { /* no more objects read in the buffer */
if (d->offset==-1) { /* no more objects to read */
return NULL;
}
d->read=255;
if (SWI_OS_GBPB_9(d->dirname,d->buf,&d->read,&d->offset,DIR_BUFSIZE,NULL)!=NULL)
return NULL;
if (d->read==0) {
d->offset=-1;
return NULL;
}
d->read--;
d->act=(char *)d->buf;
}
else { /* some object is ready in buffer */
d->read--;
d->act=(char *)(d->act+strlen(d->act)+1);
}
strcpy(dent.d_name,d->act);
dent.d_namlen=strlen(dent.d_name);
/* If we're returning the last item, check if there are any more.
* If there are, nothing will happen; if not, then d->offset = -1 */
if (!d->read)
SWI_OS_GBPB_9(d->dirname,d->buf,&d->read,&d->offset,0,NULL);
return &dent;
}
void closedir(DIR *d)
{
if (d->buf!=NULL)
free(d->buf);
if (d->dirname!=NULL)
free(d->dirname);
free(d);
}
int unlink(f)
char *f; /* file to delete */
/* Delete the file *f, returning non-zero on failure. */
{
os_error *er;
char canon[256];
int size=255;
er=SWI_OS_FSControl_37(f,canon,&size);
if (er==NULL) {
er=SWI_OS_FSControl_27(canon,0x100);
}
else {
er=SWI_OS_FSControl_27(f,0x100);
}
return (int)er;
}
int rmdir(char *d)
{
int objtype;
char *s;
int len;
len = strlen(d);
if ((s = malloc(len + 1)) == NULL)
return -1;
strcpy(s,d);
if (s[len-1]=='.')
s[len-1]=0;
if (SWI_OS_File_5(s,&objtype,NULL,NULL,NULL,NULL)!=NULL) {
free(s);
return -1;
}
if (objtype<2 || (!uO.scanimage && objtype==3)) {
/* this is a file or it doesn't exist */
free(s);
return -1;
}
if (SWI_OS_File_6(s)!=NULL) {
free(s);
return -1;
}
free(s);
return 0;
}
#endif /* !SFX */
int chmod(char *file, int mode)
{
/*************** NOT YET IMPLEMENTED!!!!!! ******************/
/* I don't know if this will be needed or not... */
file=file;
mode=mode;
return 0;
}
void setfiletype(char *fname,int ftype)
{
char str[256];
sprintf(str,"SetType %s &%3.3X",fname,ftype);
SWI_OS_CLI(str);
}
void getRISCOSexts(char *envstr)
{
char *envptr; /* value returned by getenv */
envptr = getenv(envstr);
if (envptr == NULL || *envptr == 0) return;
exts2swap=malloc(1+strlen(envptr));
if (exts2swap == NULL)
return;
strcpy(exts2swap, envptr);
}
int checkext(char *suff)
{
register char *extptr = exts2swap ? exts2swap : "";
register char *suffptr;
register int e,s;
while(*extptr) {
suffptr=suff;
e=*extptr; s=*suffptr;
while (e && e!=':' && s && s!='.' && s!='/' && e==s) {
e=*++extptr; s=*++suffptr;
}
if (e==':') e=0;
if (s=='.' || s=='/') s=0;
if (!e && !s) {
return 1;
}
while(*extptr!=':' && *extptr!='\0') /* skip to next extension */
extptr++;
if (*extptr!='\0')
extptr++;
}
return 0;
}
void swapext(char *name, char *exptr)
{
char ext[MAXEXT];
register char *p1=exptr+1;
register char *p2=ext;
int extchar=*exptr;
while(*p1 && *p1!='.' && *p1!='/')
*p2++=*p1++;
*p2=0;
p2=exptr-1;
p1--;
while(p2 >= name)
*p1--=*p2--;
p1=name;
p2=ext;
while(*p2)
*p1++=*p2++;
*p1=(extchar=='/'?'.':'/');
}
void remove_prefix(void)
{
SWI_DDEUtils_Prefix(NULL);
}
void set_prefix(void)
{
char *pref;
int size=0;
if (SWI_OS_FSControl_37("@",pref,&size)!=NULL)
return;
size=1-size;
if (pref=malloc(size),pref!=NULL) {
if (SWI_OS_FSControl_37("@",pref,&size)!=NULL) {
free(pref);
return;
}
if (SWI_DDEUtils_Prefix(pref)==NULL) {
atexit(remove_prefix);
}
free(pref);
}
}
#ifdef localtime
# undef localtime
#endif
#ifdef gmtime
# undef gmtime
#endif
/* Acorn's implementation of localtime() and gmtime()
* doesn't consider the timezone offset, so we have to
* add it before calling the library functions
*/
struct tm *riscos_localtime(const time_t *timer)
{
time_t localt=*timer;
localt+=SWI_Read_Timezone()/100;
return localtime(&localt);
}
struct tm *riscos_gmtime(const time_t *timer)
{
time_t localt=*timer;
localt+=SWI_Read_Timezone()/100;
return gmtime(&localt);
}