Import sources from 2011-03-30 iso image

1 files changed, 51 insertions, 0 deletions

diff --git a/sys/src/libstdio/fwrite.c b/sys/src/libstdio/fwrite.c
new file mode 100755
index 000000000..d77679b22
--- /dev/null
+++ b/sys/src/libstdio/fwrite.c
@@ -0,0 +1,51 @@
+/*
+ * pANS stdio -- fwrite
+ */
+#include "iolib.h"
+
+#define BIGN (BUFSIZ/2)
+
+long fwrite(const void *p, long recl, long nrec, FILE *f){
+	char *s;
+	int n, d;
+
+	s=(char *)p;
+	n=recl*nrec;
+	while(n>0){
+		d=f->rp-f->wp;
+		if(d>0){
+			if(d>n)
+				d=n;
+			memmove(f->wp, s, d);
+			f->wp+=d;
+		}else{
+			if(n>=BIGN && f->state==WR && !(f->flags&(STRING|LINEBUF)) && f->buf!=f->unbuf){
+				d=f->wp-f->buf;
+				if(d>0){
+					if(f->flags&APPEND)
+						seek(f->fd, 0L, 2);
+					if(write(f->fd, f->buf, d)!=d){
+						f->state=ERR;
+						goto ret;
+					}
+					f->wp=f->rp=f->buf;
+				}
+				if(f->flags&APPEND)
+					seek(f->fd, 0L, 2);
+				d=write(f->fd, s, n);
+				if(d<=0){
+					f->state=ERR;
+					goto ret;
+				}
+			}else{
+				if(_IO_putc(*s, f)==EOF)
+					goto ret;
+				d=1;
+			}
+		}
+		s+=d;
+		n-=d;
+	}
+    ret:
+	return (s-(char *)p)/(recl?recl:1);
+}