[clangd] add cmake files and guide for clangd usage

.clangd

@@ -1,2 +1,2 @@
 CompileFlags:
-    Add: [-std=c23]
+  CompilationDatabase: build

.gitignore

@@ -86,3 +86,5 @@ dkms.conf
 *.out
 *.app
 
+.cache/
+build/

CMakeLists.txt

@@ -0,0 +1,9 @@
+cmake_minimum_required(VERSION 3.20)
+project(pracitces)
+
+set(CMAKE_C_STANDARD 23)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+set(GLOBAL_INCLUDES ${CMAKE_SOURCE_DIR}/include)
+
+add_subdirectory(practice-1)

README.md

@@ -1,3 +1,13 @@
 # practices
-
 Repository with code from practice sessions
+
+# Clangd
+First, build the project to generate `compile_commands.json`:
+```bash
+cmake -B build
+```
+Then tell clangd where to find it by adding to `.clangd`:
+```yaml
+CompileFlags:
+  CompilationDatabase: build
+```

include/add.h

@@ -0,0 +1,3 @@
+#include <stdint.h>
+
+int32_t add(int32_t a, int32_t b);

practice-1/CMakeLists.txt

@@ -0,0 +1,2 @@
+add_executable(practice-1 main.c)
+target_include_directories(practice-1 PRIVATE ${GLOBAL_INCLUDES})

practice-1/main.c

@@ -1,13 +1,13 @@
-#include <stdio.h>
 #include <stdint.h>
+#include <stdio.h>
 #include <stdlib.h>
 
 struct my_perfect_float
 {
-  unsigned char sign;
-  signed char exponent;
-  unsigned char dop_var;
-  int mantissa;
+	unsigned char sign;
+	signed char exponent;
+	unsigned char dop_var;
+	int mantissa;
 };
 
 // 1. вернуть объект с некорректными данными в нём
@@ -22,62 +22,61 @@ const int MANTISSA_SIZE = 24;
 
 struct dm_e
 {
-  struct dm result;
-  int error_code;
+	struct dm result;
+	int error_code;
 };
 
 struct dm
 {
-  int32_t div;
-  int32_t mod;
+	int32_t div;
+	int32_t mod;
 };
 
-
 int divmod(int32_t x, int32_t y, struct dm* dm)
 {
-  int aa = 2; // initialization
-  aa = 3; // assignment
-  int bb; // non-initialize
-  if (y == 0)
-  {
-    return 1;
-  }
-  *dm = (struct dm){ .div = x / y, .mod = x % y };
-  return 0;
+	int aa = 2;	   // initialization
+	aa = 3;		   // assignment
+	int bb;		   // non-initialize
+	if (y == 0)
+	{
+		return 1;
+	}
+	*dm = (struct dm){ .div = x / y, .mod = x % y };
+	return 0;
 }
 
 // x, y => /, %
-struct dm divmod(int32_t x, int32_t y, int *error_code)
+struct dm divmod(int32_t x, int32_t y, int* error_code)
 {
-  int aa = 2; // initialization
-  aa = 3; // assignment
-  int bb; // non-initialize
-  if (y == 0)
-  {
-    *error_code = 1;
-    return (struct dm) { .div = 0, .mod = 0 };
-  }
-  //struct dm dm = { .div = x / y, .mod = x % y };
-  //return dm;
-  return (struct dm){ .div = x / y, .mod = x % y }; // compound literal
+	int aa = 2;	   // initialization
+	aa = 3;		   // assignment
+	int bb;		   // non-initialize
+	if (y == 0)
+	{
+		*error_code = 1;
+		return (struct dm){ .div = 0, .mod = 0 };
+	}
+	// struct dm dm = { .div = x / y, .mod = x % y };
+	// return dm;
+	return (struct dm){ .div = x / y, .mod = x % y };	 // compound literal
 }
 
 int main(int argc, char* argv[])
 {
-  if (argc != 4)
-  {
-    // free resourses
-    fprintf(stderr, "Usage: %s A.B <rounding> <number>\n", argv[0]);
-    return 1;
-  }
+	if (argc != 4)
+	{
+		// free resourses
+		fprintf(stderr, "Usage: %s A.B <rounding> <number>\n", argv[0]);
+		return 1;
+	}
 
-  int32_t a, b;
+	int32_t a, b;
 
-  int sz = 5;
-  // .... 100 lines
-  int64_t c;
+	int sz = 5;
+	// .... 100 lines
+	int64_t c;
 
-  c = 2;
+	c = 2;
 
-  return 0;
+	return 0;
 }