diff options
author | Nicholas <nbnoll@eml.cc> | 2021-11-11 17:07:44 -0800 |
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committer | Nicholas <nbnoll@eml.cc> | 2021-11-11 17:07:44 -0800 |
commit | b375f3cdedb5b0e08745d100b40e38d2f8396a58 (patch) | |
tree | a51d5763646ff482c26e79bfc1dcebccbe4812a7 /sys/base/bufio/unget.c | |
parent | 44b30ea0883af2827e618a45d472b47cf041a842 (diff) | |
parent | 9695ea005d4af93dcd60f74f10fd3c54499a182f (diff) |
chore: merge master into laptop
Diffstat (limited to 'sys/base/bufio/unget.c')
-rw-r--r-- | sys/base/bufio/unget.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/sys/base/bufio/unget.c b/sys/base/bufio/unget.c new file mode 100644 index 0000000..3fd16de --- /dev/null +++ b/sys/base/bufio/unget.c @@ -0,0 +1,18 @@ +#include "internal.h" + +error +bufio·ungetbyte(io·Buffer *buf, byte c) +{ + if(!(buf->state & bufio·rdr)) { + errorf("attempted to unget on non-active reader"); + return bufio·err; + } + + if(buf->pos == buf->buf) { + errorf("attempted to unget past end of buffer"); + return bufio·err; + } + + buf->pos--; + return 0; +} |