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Introduce read_slice, make read_u8 use it.

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Jeroen van Rijn
2021-06-23 16:32:48 +02:00
parent 8663c64e47
commit 538004ba5f
1 changed files with 21 additions and 1 deletions
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core/compress/common.odin
+21 -1
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@@ -123,8 +123,22 @@ Code_Buffer :: struct #packed {
This simplifies end-of-stream handling where bits may be left in the bit buffer. This simplifies end-of-stream handling where bits may be left in the bit buffer.
*/ */
read_slice :: #force_inline proc(c: ^Context, size: int) -> (res: []u8, err: io.Error) {
when #config(TRACY_ENABLE, false) { tracy.ZoneN("Read Slice"); }
b := make([]u8, size, context.temp_allocator);
_, e := c.input->impl_read(b[:]);
if e != .None {
return []u8{}, e;
}
return b, .None;
}
read_data :: #force_inline proc(c: ^Context, $T: typeid) -> (res: T, err: io.Error) { read_data :: #force_inline proc(c: ^Context, $T: typeid) -> (res: T, err: io.Error) {
when #config(TRACY_ENABLE, false) { tracy.ZoneN("Read Data"); } when #config(TRACY_ENABLE, false) { tracy.ZoneN("Read Data"); }
when size_of(T) <= 128 { when size_of(T) <= 128 {
b: [size_of(T)]u8; b: [size_of(T)]u8;
} else { } else {
@@ -141,7 +155,13 @@ read_data :: #force_inline proc(c: ^Context, $T: typeid) -> (res: T, err: io.Err
read_u8 :: #force_inline proc(z: ^Context) -> (res: u8, err: io.Error) { read_u8 :: #force_inline proc(z: ^Context) -> (res: u8, err: io.Error) {
when #config(TRACY_ENABLE, false) { tracy.ZoneN("Read u8"); } when #config(TRACY_ENABLE, false) { tracy.ZoneN("Read u8"); }
return read_data(z, u8);
b, e := read_slice(z, 1);
if e == .None {
return b[0], .None;
} else {
return 0, e;
}
} }
peek_data :: #force_inline proc(c: ^Context, $T: typeid) -> (res: T, err: io.Error) { peek_data :: #force_inline proc(c: ^Context, $T: typeid) -> (res: T, err: io.Error) {