void Save_Config(const char* fn,int n)
{
/*
存储分页及书签配置
参数说明：
fn: 当前打开文件的文件名
n: 已缓存页数
*/
char tmp[64];
FONTCHARACTER fname[64];
int handle,size=0;
memset(tmp,0,sizeof(tmp));
strncpy(tmp,fn,strlen(fn)-strlen(strrchr(fn,'.'))); // 取文件名部分
strcat(tmp,".cfg");
char_to_font(tmp,fname);
Bfile_CreateEntry_OS(fname,1,&size); // 创建 .cfg 文件
handle=Bfile_OpenFile_OS(fname,2);
if (handle<=0) return;
Bfile_WriteFile_OS(handle,&n,4); // 前 4 字节，写入已缓存页数
Bfile_SeekFile_OS(handle,4);
Bfile_WriteFile_OS(handle,bookmark,16); // 4*4 字节，写入书签指向的页数
Bfile_SeekFile_OS(handle,20);
Bfile_WriteFile_OS(handle,bytes,n*4); // 4*n 字节，写入页面缓存
Bfile_CloseFile_OS(handle);
}
int fseek(FILE *f, long offset, int whence) {
if (isstdstream(f)) {
IOERR(f, ERANGE);
return -1;
}
switch (whence) {
case SEEK_CUR:
offset = ftell(f) + offset;
break;
case SEEK_END:
// TODO this probably doesn't work. Wild guessing.
// Speculation says we have Bfile_GetFileSize_OS
offset = INT_MAX;
break;
case SEEK_SET:
break;
default:
return -1;
}
int fileno = handle_tonative(f->fileno);
// TODO can this fail? Probably.
Bfile_SeekFile_OS(fileno, (int)offset);
f->error = 0;
return 0;
}
off_t lseek(int fd, off_t offset, int whence){
if(fd>5){
int fileno = toNativeFD(toNativeFD(fd));
switch (whence) {
case SEEK_CUR:
offset = Bfile_TellFile_OS(fileno) + offset;
break;
case SEEK_END:
offset = Bfile_GetFileSize_OS(fileno);
break;
case SEEK_SET:
break;
default:
return -1;
}
// TODO can this fail? Probably.
Bfile_SeekFile_OS(fileno, (int)offset);
}else
return -1;
}
