From 359d71e90050a8b83f7bc7d2ecd4ff29c477cc22 Mon Sep 17 00:00:00 2001
From: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Date: Sun, 26 Jun 2022 22:51:27 +0200
Subject: Cleanup: rename libfstream to libio, split headers
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
---
lib/io/win32/istream.c | 138 ++++++++++++++++++++++++++++++++++
lib/io/win32/ostream.c | 197 +++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 335 insertions(+)
create mode 100644 lib/io/win32/istream.c
create mode 100644 lib/io/win32/ostream.c
(limited to 'lib/io/win32')
diff --git a/lib/io/win32/istream.c b/lib/io/win32/istream.c
new file mode 100644
index 0000000..b591584
--- /dev/null
+++ b/lib/io/win32/istream.c
@@ -0,0 +1,138 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * istream.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "../internal.h"
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+typedef struct {
+ istream_t base;
+ char *path;
+ HANDLE hnd;
+
+ sqfs_u8 buffer[BUFSZ];
+} file_istream_t;
+
+static int file_precache(istream_t *strm)
+{
+ file_istream_t *file = (file_istream_t *)strm;
+ DWORD diff, actual;
+ HANDLE hnd;
+
+ hnd = file->path == NULL ? GetStdHandle(STD_INPUT_HANDLE) : file->hnd;
+
+ while (strm->buffer_used < sizeof(file->buffer)) {
+ diff = sizeof(file->buffer) - strm->buffer_used;
+
+ if (!ReadFile(hnd, strm->buffer + strm->buffer_used,
+ diff, &actual, NULL)) {
+ DWORD error = GetLastError();
+
+ if (error == ERROR_HANDLE_EOF ||
+ error == ERROR_BROKEN_PIPE) {
+ strm->eof = true;
+ break;
+ }
+
+ SetLastError(error);
+
+ w32_perror(file->path == NULL ? "stdin" : file->path);
+ return -1;
+ }
+
+ if (actual == 0) {
+ strm->eof = true;
+ break;
+ }
+
+ strm->buffer_used += actual;
+ }
+
+ return 0;
+}
+
+static const char *file_get_filename(istream_t *strm)
+{
+ file_istream_t *file = (file_istream_t *)strm;
+
+ return file->path == NULL ? "stdin" : file->path;
+}
+
+static void file_destroy(sqfs_object_t *obj)
+{
+ file_istream_t *file = (file_istream_t *)obj;
+
+ if (file->path != NULL) {
+ CloseHandle(file->hnd);
+ free(file->path);
+ }
+
+ free(file);
+}
+
+istream_t *istream_open_file(const char *path)
+{
+ file_istream_t *file = calloc(1, sizeof(*file));
+ sqfs_object_t *obj = (sqfs_object_t *)file;
+ istream_t *strm = (istream_t *)file;
+ WCHAR *wpath = NULL;
+
+ if (file == NULL) {
+ perror(path);
+ return NULL;
+ }
+
+ wpath = path_to_windows(path);
+ if (wpath == NULL)
+ goto fail_free;
+
+ file->path = strdup(path);
+ if (file->path == NULL) {
+ perror(path);
+ goto fail_free;
+ }
+
+ file->hnd = CreateFileW(wpath, GENERIC_READ, FILE_SHARE_READ, NULL,
+ OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+
+ if (file->hnd == INVALID_HANDLE_VALUE) {
+ perror(path);
+ goto fail_path;
+ }
+
+ free(wpath);
+
+ strm->buffer = file->buffer;
+ strm->precache = file_precache;
+ strm->get_filename = file_get_filename;
+ obj->destroy = file_destroy;
+ return strm;
+fail_path:
+ free(file->path);
+fail_free:
+ free(wpath);
+ free(file);
+ return NULL;
+}
+
+istream_t *istream_open_stdin(void)
+{
+ file_istream_t *file = calloc(1, sizeof(*file));
+ sqfs_object_t *obj = (sqfs_object_t *)file;
+ istream_t *strm = (istream_t *)file;
+
+ if (file == NULL) {
+ perror("stdin");
+ return NULL;
+ }
+
+ strm->buffer = file->buffer;
+ strm->precache = file_precache;
+ strm->get_filename = file_get_filename;
+ obj->destroy = file_destroy;
+ return strm;
+}
diff --git a/lib/io/win32/ostream.c b/lib/io/win32/ostream.c
new file mode 100644
index 0000000..2bd78c8
--- /dev/null
+++ b/lib/io/win32/ostream.c
@@ -0,0 +1,197 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * ostream.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "../internal.h"
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+typedef struct {
+ ostream_t base;
+ char *path;
+ HANDLE hnd;
+} file_ostream_t;
+
+static int w32_append(HANDLE hnd, const char *filename,
+ const void *data, size_t size)
+{
+ DWORD diff;
+
+ while (size > 0) {
+ if (!WriteFile(hnd, data, size, &diff, NULL)) {
+ w32_perror(filename);
+ return -1;
+ }
+
+ size -= diff;
+ data = (const char *)data + diff;
+ }
+
+ return 0;
+}
+
+static int w32_flush(HANDLE hnd, const char *filename)
+{
+ if (!FlushFileBuffers(hnd)) {
+ w32_perror(filename);
+ return -1;
+ }
+
+ return 0;
+}
+
+/*****************************************************************************/
+
+static int file_append(ostream_t *strm, const void *data, size_t size)
+{
+ file_ostream_t *file = (file_ostream_t *)strm;
+
+ return w32_append(file->hnd, file->path, data, size);
+}
+
+static int file_append_sparse(ostream_t *strm, size_t size)
+{
+ file_ostream_t *file = (file_ostream_t *)strm;
+ LARGE_INTEGER pos;
+
+ pos.QuadPart = size;
+
+ if (!SetFilePointerEx(file->hnd, pos, NULL, FILE_CURRENT))
+ goto fail;
+
+ if (!SetEndOfFile(file->hnd))
+ goto fail;
+
+ return 0;
+fail:
+ w32_perror(file->path);
+ return -1;
+}
+
+static int file_flush(ostream_t *strm)
+{
+ file_ostream_t *file = (file_ostream_t *)strm;
+
+ return w32_flush(file->hnd, file->path);
+}
+
+static void file_destroy(sqfs_object_t *obj)
+{
+ file_ostream_t *file = (file_ostream_t *)obj;
+
+ CloseHandle(file->hnd);
+ free(file->path);
+ free(file);
+}
+
+static const char *file_get_filename(ostream_t *strm)
+{
+ file_ostream_t *file = (file_ostream_t *)strm;
+
+ return file->path;
+}
+
+/*****************************************************************************/
+
+static int stdout_append(ostream_t *strm, const void *data, size_t size)
+{
+ (void)strm;
+ return w32_append(GetStdHandle(STD_OUTPUT_HANDLE), "stdout",
+ data, size);
+}
+
+static int stdout_flush(ostream_t *strm)
+{
+ (void)strm;
+ return w32_flush(GetStdHandle(STD_OUTPUT_HANDLE), "stdout");
+}
+
+static void stdout_destroy(sqfs_object_t *obj)
+{
+ free(obj);
+}
+
+static const char *stdout_get_filename(ostream_t *strm)
+{
+ (void)strm;
+ return "stdout";
+}
+
+/*****************************************************************************/
+
+ostream_t *ostream_open_file(const char *path, int flags)
+{
+ file_ostream_t *file = calloc(1, sizeof(*file));
+ sqfs_object_t *obj = (sqfs_object_t *)file;
+ ostream_t *strm = (ostream_t *)file;
+ int access_flags, creation_mode;
+ WCHAR *wpath = NULL;
+
+ if (file == NULL) {
+ perror(path);
+ return NULL;
+ }
+
+ wpath = path_to_windows(path);
+ if (wpath == NULL)
+ goto fail_free;
+
+ file->path = strdup(path);
+ if (file->path == NULL) {
+ perror(path);
+ goto fail_free;
+ }
+
+ access_flags = GENERIC_WRITE;
+
+ if (flags & OSTREAM_OPEN_OVERWRITE) {
+ creation_mode = CREATE_ALWAYS;
+ } else {
+ creation_mode = CREATE_NEW;
+ }
+
+ file->hnd = CreateFileW(wpath, access_flags, 0, NULL, creation_mode,
+ FILE_ATTRIBUTE_NORMAL, NULL);
+
+ if (file->hnd == INVALID_HANDLE_VALUE) {
+ w32_perror(path);
+ goto fail_path;
+ }
+
+ free(wpath);
+
+ if (flags & OSTREAM_OPEN_SPARSE)
+ strm->append_sparse = file_append_sparse;
+
+ strm->append = file_append;
+ strm->flush = file_flush;
+ strm->get_filename = file_get_filename;
+ obj->destroy = file_destroy;
+ return strm;
+fail_path:
+ free(file->path);
+fail_free:
+ free(file);
+ free(wpath);
+ return NULL;
+}
+
+ostream_t *ostream_open_stdout(void)
+{
+ ostream_t *strm = calloc(1, sizeof(*strm));
+ sqfs_object_t *obj = (sqfs_object_t *)strm;
+
+ if (strm == NULL) {
+ perror("creating stdout file wrapper");
+ return NULL;
+ }
+
+ strm->append = stdout_append;
+ strm->flush = stdout_flush;
+ strm->get_filename = stdout_get_filename;
+ obj->destroy = stdout_destroy;
+ return strm;
+}
--
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