riscos.c
资源名称:unzip540.zip [点击查看]
上传用户:andy_li
上传日期:2007-01-06
资源大小:1019k
文件大小:6k
源码类别:
压缩解压
开发平台:
MultiPlatform
- /* 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 = ""; /* 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);
- 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;
- 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!=' ') /* skip to next extension */
- extptr++;
- if (*extptr!=' ')
- 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);
- }