[PATCH 22/25] efw-downloader: subcmd-file: add 'file' sub command

[Takashi Sakamoto <o-takashi@xxxxxxxxxxxxx>]

This commit adds 'file' subcommand to handle firmware files.

Signed-off-by: Takashi Sakamoto <o-takashi@xxxxxxxxxxxxx>
---
 efw-downloader/src/meson.build   |  1 +
 efw-downloader/src/subcmd-file.c | 85 ++++++++++++++++++++++++++++++++
 efw-downloader/src/subcmds.h     |  2 +
 3 files changed, 88 insertions(+)
 create mode 100644 efw-downloader/src/subcmd-file.c

diff --git a/efw-downloader/src/meson.build b/efw-downloader/src/meson.build
index 05d491d..7d11332 100644
--- a/efw-downloader/src/meson.build
+++ b/efw-downloader/src/meson.build
@@ -22,6 +22,7 @@ sources = [
   'file-cntr.c',
   'subcmd-device.c',
   'op-device-read.c',
+  'subcmd-file.c',
 ]
 
 headers = [
diff --git a/efw-downloader/src/subcmd-file.c b/efw-downloader/src/subcmd-file.c
new file mode 100644
index 0000000..0ee7653
--- /dev/null
+++ b/efw-downloader/src/subcmd-file.c
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2020 Takashi Sakamoto
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <assert.h>
+
+#include "subcmds.h"
+
+static void print_help()
+{
+    printf("Usage\n"
+           "  efw-downloader file FILEPATH OPERATION ARGUMENTS\n"
+           "\n"
+           "where:\n"
+           "  FILEPATH: The path to file.\n"
+           "  OPERATION:\n"
+           "    help:   print this help message\n"
+           "  ARGUMENTS:\n"
+           "    depending on the OPERATION\n");
+}
+
+static int parse_args(int argc, char **argv, const char **filepath, const char **op_name)
+{
+    if (argc < 2)
+        return -EINVAL;
+    assert(strncmp(argv[1], "file", sizeof("file")) == 0);
+
+    if (argc < 3)
+        return -EINVAL;
+    *filepath = argv[2];
+
+    if (argc < 4)
+        return -EINVAL;
+    *op_name = argv[3];
+
+    return 0;
+}
+
+int subcmd_file(int argc, char **argv)
+{
+    struct {
+        const char *name;
+        size_t size;
+        int (*op)(int argc, char **argv, struct file_cntr *cntr);
+    } *entry, entries[] = {
+    };
+    const char *op_name;
+    const char *filepath;
+    struct file_cntr cntr = {0};
+    int err;
+    int i;
+
+    err = parse_args(argc, argv, &filepath, &op_name);
+    if (err < 0) {
+        print_help();
+        return EXIT_FAILURE;
+    }
+
+    for (i = 0; i < sizeof(entries) / sizeof(entries[0]); ++i) {
+        entry = entries + i;
+        if (strncmp(op_name, entry->name, entry->size) == 0)
+            break;
+    }
+    if (i == sizeof(entries) / sizeof(entries[0])) {
+        print_help();
+        return EXIT_FAILURE;
+    }
+
+    err = file_cntr_parse(&cntr, filepath);
+    if (err < 0) {
+        printf("Fail to parse: %s\n", strerror(-err));
+        return EXIT_FAILURE;
+    }
+
+    err = entry->op(argc, argv, &cntr);
+
+    file_cntr_release(&cntr);
+
+    if (err < 0)
+        return EXIT_FAILURE;
+
+    return EXIT_SUCCESS;
+}
diff --git a/efw-downloader/src/subcmds.h b/efw-downloader/src/subcmds.h
index 70cbb5a..b1810b3 100644
--- a/efw-downloader/src/subcmds.h
+++ b/efw-downloader/src/subcmds.h
@@ -4,8 +4,10 @@
 #define __SUBCMDS_H__
 
 #include "efw-proto.h"
+#include "file-cntr.h"
 
 int subcmd_device(int argc, char **argv);
+int subcmd_file(int argc, char **argv);
 
 void op_device_read(int argc, char **argv, EfwProto *proto, GError **error);
 
-- 
2.25.1