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stream: stream_seek will do clamped movement if offset is invalid

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If a forward/backward offset is too big, we'll clamp to the edges of
the file rather than failing completely.  We return the number of
bytes moved so callers can still validate, but the stream API can now
deal with these situations a bit more effectively.
This commit is contained in:
Aryadev Chavali
2026-02-06 04:53:10 +00:00
parent 5a78b01a57
commit 5bb83cfab7
2 changed files with 19 additions and 14 deletions
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6
include/alisp/stream.h
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@@ -66,9 +66,9 @@ char stream_next(stream_t *);
// Peek current character, do not push position
char stream_peek(stream_t *);
// Move forward or backward in the stream, return success of operation
bool stream_seek(stream_t *, i64);
bool stream_seek_forward(stream_t *, u64);
bool stream_seek_backward(stream_t *, u64);
u64 stream_seek(stream_t *, i64);
u64 stream_seek_forward(stream_t *, u64);
u64 stream_seek_backward(stream_t *, u64);
// Return a relative substring of a given size
sv_t stream_substr(stream_t *, u64);