Add compat bits for libtls on Windows

tls/CMakeLists.txt

@@ -19,6 +19,16 @@ set(
 	tls_verify.c
 )
 
+if(CMAKE_HOST_WIN32)
+set(
+	TLS_SRC
+	${TLS_SRC}
+	compat/ftruncate.c
+	compat/getuid.c
+	compat/pread.c
+	compat/pwrite.c
+)
+endif()
 
 if(NOT "${OPENSSLDIR}" STREQUAL "")
 	add_definitions(-D_PATH_SSL_CA_FILE=\"${OPENSSLDIR}/cert.pem\")

tls/Makefile.am

@@ -30,3 +30,10 @@ libtls_la_SOURCES += tls_peer.c
 libtls_la_SOURCES += tls_util.c
 libtls_la_SOURCES += tls_verify.c
 noinst_HEADERS = tls_internal.h
+
+if HOST_WIN
+libtls_la_SOURCES += compat/ftruncate.c
+libtls_la_SOURCES += compat/getuid.c
+libtls_la_SOURCES += compat/pread.c
+libtls_la_SOURCES += compat/pwrite.c
+endif

tls/compat/ftruncate.c

@@ -0,0 +1,13 @@
+/*
+ * Public domain
+ *
+ * Kinichiro Inoguchi <inoguchi@openbsd.org>
+ */
+
+#include <unistd.h>
+
+int
+ftruncate(int fd, off_t length)
+{
+	return _chsize(fd, length);
+}

tls/compat/getuid.c

@@ -0,0 +1,14 @@
+/*
+ * Public domain
+ *
+ * Kinichiro Inoguchi <inoguchi@openbsd.org>
+ */
+
+#include <unistd.h>
+
+uid_t
+getuid(void)
+{
+	/* Windows fstat sets 0 as st_uid */
+	return 0;
+}

tls/compat/pread.c

@@ -0,0 +1,23 @@
+/*
+ * Public domain
+ *
+ * Kinichiro Inoguchi <inoguchi@openbsd.org>
+ */
+
+#include <unistd.h>
+
+ssize_t
+pread(int d, void *buf, size_t nbytes, off_t offset)
+{
+	off_t cpos, opos, rpos;
+	ssize_t bytes;
+	if((cpos = lseek(d, 0, SEEK_CUR)) == -1)
+		return -1;
+	if((opos = lseek(d, offset, SEEK_SET)) == -1)
+		return -1;
+	if((bytes = read(d, buf, nbytes)) == -1)
+		return -1;
+	if((rpos = lseek(d, cpos, SEEK_SET)) == -1)
+		return -1;
+	return bytes;
+}

tls/compat/pwrite.c

@@ -0,0 +1,23 @@
+/*
+ * Public domain
+ *
+ * Kinichiro Inoguchi <inoguchi@openbsd.org>
+ */
+
+#include <unistd.h>
+
+ssize_t
+pwrite(int d, const void *buf, size_t nbytes, off_t offset)
+{
+	off_t cpos, opos, rpos;
+	ssize_t bytes;
+	if((cpos = lseek(d, 0, SEEK_CUR)) == -1)
+		return -1;
+	if((opos = lseek(d, offset, SEEK_SET)) == -1)
+		return -1;
+	if((bytes = write(d, buf, nbytes)) == -1)
+		return -1;
+	if((rpos = lseek(d, cpos, SEEK_SET)) == -1)
+		return -1;
+	return bytes;
+}