rcx

commit 79a944325f45499e3bf4e150c0b7375664af205f
parent 7fc80a6d5d3387ccbcd3200480b5b999f01f52b7
Author: Robert Russell <robertrussell.72001@gmail.com>
Date:   Sat,  7 Jan 2023 18:52:02 -0800

Add read_all and write_all functions

Diffstat:
M
Makefile
 | 
2
++
M
inc/rcx/all.h
 | 
1
+
A
inc/rcx/unix.h
 | 
6
++++++
A
src/unix.c
 | 
35
+++++++++++++++++++++++++++++++++++

4 files changed, 44 insertions(+), 0 deletions(-)
diff --git a/Makefile b/Makefile
@@ -8,6 +8,7 @@ SRC =\
 	src/log.c\
 	src/str.c\
 	src/unicode.c\
+	src/unix.c\
 	src/utf8.c
 	# src/opt.c needs work
 
@@ -23,6 +24,7 @@ src/log.o: src/log.c inc/rcx/def.h inc/rcx/log.h inc/rcx/rcx.h config.mk
 src/opt.o: src/opt.c inc/rcx/def.h inc/rcx/opt.h inc/rcx/rcx.h config.mk
 src/str.o: src/str.c inc/rcx/alloc.h inc/rcx/def.h inc/rcx/log.h inc/rcx/rcx.h inc/rcx/str.h config.mk
 src/unicode.o: src/unicode.c inc/rcx/def.h inc/rcx/rcx.h gen/ucattab.inc config.mk
+src/unix.o: src/unix.c inc/rcx/def.h inc/rcx/rcx.h config.mk
 src/utf8.o: src/utf8.c inc/rcx/def.h inc/rcx/rcx.h inc/rcx/utf8.h config.mk
 
 gen/ucattab.inc: gen tool/ucattab gen/UnicodeData.txt
diff --git a/inc/rcx/all.h b/inc/rcx/all.h
@@ -6,5 +6,6 @@
 #include "rcx/rcx.h"
 #include "rcx/str.h"
 #include "rcx/unicode.h"
+#include "rcx/unix.h"
 #include "rcx/utf8.h"
 #include "rcx/vector.h"
diff --git a/inc/rcx/unix.h b/inc/rcx/unix.h
@@ -0,0 +1,6 @@
+#pragma once
+
+#include "rcx/def.h"
+
+int r_read_all(usize *n, int fd, void *buf, usize len);
+int r_write_all(usize *n, int fd, void *buf, usize len);
diff --git a/src/unix.c b/src/unix.c
@@ -0,0 +1,35 @@
+#include <errno.h>
+#include <unistd.h>
+
+#include "rcx/rcx.h"
+
+typedef isize (*IoOp)(int, void *, usize);
+
+static int
+perform_io(usize *n_, IoOp op, int fd, void *buf, usize len) {
+	usize n = 0;
+	do {
+		isize ret = op(fd, (char *)buf + n, len - n);
+		if (ret < 0) {
+			if (errno == EINTR)
+				continue;
+			*n_ = n;
+			return -1;
+		}
+		n += ret;
+	} while (n < len);
+
+	*n_ = n;
+	return 0;
+}
+
+int
+r_read_all(usize *n, int fd, void *buf, usize len) {
+	return perform_io(n, read, fd, buf, len);
+}
+
+int
+r_write_all(usize *n, int fd, void *buf, usize len) {
+	/* Cast off const-ness from write. */
+	return perform_io(n, (IoOp)write, fd, buf, len);
+}