diff options
| author | cinap_lenrek <cinap_lenrek@centraldogma> | 2011-10-06 00:39:05 +0200 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@centraldogma> | 2011-10-06 00:39:05 +0200 |
| commit | c0c9a9927f413e70f59158a10c460b1927985f44 (patch) | |
| tree | 8455dbc351cf7c3536f21027a1ab56c407d585cc /sys/src/libbio | |
| parent | 7e744bda2bfe0c664890b0f844591793fb08c976 (diff) | |
libbio: add Breadn
Diffstat (limited to 'sys/src/libbio')
| -rw-r--r-- | sys/src/libbio/breadn.c | 26 | ||||
| -rw-r--r-- | sys/src/libbio/mkfile | 1 |
2 files changed, 27 insertions, 0 deletions
diff --git a/sys/src/libbio/breadn.c b/sys/src/libbio/breadn.c new file mode 100644 index 000000000..fa335873f --- /dev/null +++ b/sys/src/libbio/breadn.c @@ -0,0 +1,26 @@ +#include <u.h> +#include <libc.h> +#include <bio.h> + +long +Breadn(Biobufhdr *bp, void *data, long len) +{ + char *e, *p; + int n; + + p = data; + e = p + len; + if(e < p){ + Berror(bp, "invalid read length"); + return -1; + } + while(p < e){ + if((n = Bread(bp, p, e - p)) <= 0){ + if(n < 0 && p == data) + return -1; + break; + } + p += n; + } + return p - (char*)data; +} diff --git a/sys/src/libbio/mkfile b/sys/src/libbio/mkfile index 3b40fd25c..cae6e4850 100644 --- a/sys/src/libbio/mkfile +++ b/sys/src/libbio/mkfile @@ -17,6 +17,7 @@ OFILES=\ brdline.$O\ brdstr.$O\ bread.$O\ + breadn.$O\ bseek.$O\ bwrite.$O\ bvprint.$O\ |