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feat(iso): add seek function

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This commit is contained in:
Malo Lecomte 2022-04-24 02:43:52 +02:00
parent 525739572f
commit 90a6ebafe9
2 changed files with 33 additions and 0 deletions
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25
k/iso.c
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@ -102,6 +102,31 @@ s64 read(int fd, void *buf, size_t count)
return i; return i;
} }
s64 seek(int fd, u32 offset, int whence)
{
if (fd > MAX_FD)
return -1;
struct file_entry *f = &fd_table[fd];
if (!f->open)
return -1;
switch (whence)
{
case SEEK_SET:
f->file_offset = offset;
break;
case SEEK_CUR:
f->file_offset += offset;
break;
case SEEK_END:
f->file_offset = f->file_size + offset;
break;
}
return f->file_offset;
}
int close(int fd) int close(int fd)
{ {
return destroy_fd(fd); return destroy_fd(fd);

8
k/iso.h
View File

@ -3,10 +3,18 @@
#include <k/types.h> #include <k/types.h>
/* open flags */
#define O_RDONLY 0 #define O_RDONLY 0
/* seek flags */
#define SEEK_SET 0
#define SEEK_CUR 1
#define SEEK_END 2
/* functions */
int open(const char *path, int flags); int open(const char *path, int flags);
s64 read(int fd, void *buf, size_t count); s64 read(int fd, void *buf, size_t count);
s64 seek(int fd, u32 offset, int whence);
int close(int fd); int close(int fd);
#endif /* !ISO_H */ #endif /* !ISO_H */