Add libserialport + another improvements

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "vendor/argtable3"]
 	path = vendor/argtable3
 	url = https://github.com/argtable/argtable3
+[submodule "vendor/libserialport"]
+	path = vendor/libserialport
+	url = https://github.com/sigrokproject/libserialport/

CMakeLists.txt

@@ -9,3 +9,24 @@ add_executable(blisp src/main.c src/cmd/write.c)
 
 target_include_directories(blisp PRIVATE vendor/argtable3/src)
 target_link_libraries(blisp PRIVATE argtable3)
+
+target_sources(blisp PRIVATE
+        ${CMAKE_SOURCE_DIR}/vendor/libserialport/serialport.c
+        ${CMAKE_SOURCE_DIR}/vendor/libserialport/timing.c)
+
+if(WIN32)
+    target_link_libraries(blisp PRIVATE Setupapi.lib)
+    target_compile_definitions(blisp PRIVATE LIBSERIALPORT_MSBUILD)
+    target_sources(blisp PRIVATE
+            ${CMAKE_SOURCE_DIR}/vendor/libserialport/windows.c)
+elseif(UNIX AND NOT APPLE)
+    target_sources(blisp PRIVATE
+            ${CMAKE_SOURCE_DIR}/vendor/libserialport/linux.c
+            ${CMAKE_SOURCE_DIR}/vendor/libserialport/linux_termios.c)
+    target_compile_definitions(blisp PRIVATE
+            LIBSERIALPORT_ATBUILD
+            "SP_API=__attribute__((visibility(\"default\")))"
+            "SP_PRIV=__attribute__((visibility(\"hidden\")))")
+    target_include_directories(blisp PRIVATE ${CMAKE_SOURCE_DIR}/vendor/libserialport)
+    write_file(${CMAKE_SOURCE_DIR}/vendor/libserialport/config.h "// bypass errors.")
+endif()

src/cmd/write.c

@@ -21,6 +21,7 @@ cmd_write_args_init() {
         fprintf(stderr, "insufficient memory\n");
         return -1;
     }
+    return 0;
 }
 
 uint8_t

src/main.c

@@ -5,9 +5,11 @@
 #include <stdbool.h>
 
 struct cmd* cmds[] = {
-    &cmd_write,
+    &cmd_write
 };
 
+static uint8_t cmds_count = sizeof(cmds) / sizeof(cmds[0]);
+
 static struct arg_lit* help;
 static struct arg_lit* version;
 static struct arg_end* end;
@@ -22,11 +24,12 @@ int8_t args_init() {
         fprintf(stderr, "insufficient memory\n");
         return -1;
     }
+    return 0;
 }
 
 void print_help() {
     puts("Usage:");
-    for (uint8_t i = 0; cmds[i] != NULL; i++) {
+    for (uint8_t i = 0; i < cmds_count; i++) {
         fputs("\tblisp", stdout);
         cmds[i]->args_print_syntax();
     }
@@ -62,7 +65,7 @@ main(int argc, char** argv) {
         goto exit;
     }
 
-    for (uint8_t i = 0; cmds[i] != NULL; i++) {
+    for (uint8_t i = 0; i < cmds_count; i++) {
         if (cmds[i]->args_init() != 0) {
             exit_code = -1;
             goto exit;
@@ -74,7 +77,7 @@ main(int argc, char** argv) {
     }
 
     uint8_t command_found = false;
-    for (uint8_t i = 0; cmds[i] != NULL; i++) {
+    for (uint8_t i = 0; i < cmds_count; i++) {
         if (cmds[i]->args_parse_exec(argc, argv)) {
             command_found = true;
             break;
@@ -82,11 +85,11 @@ main(int argc, char** argv) {
     }
 
     if (!command_found) {
-
+        print_help();
     }
 
 exit:
-    for (uint8_t i = 0; cmds[i] != NULL; i++) {
+    for (uint8_t i = 0; i < cmds_count; i++) {
         cmds[i]->args_free();
     }
     args_free();