Merge pull request #82 from codecrafters-io/andy/add-c

[kafka/c] CC-2017: 2025-11 Langauges support

Author: andy1li

compiled_starters/c/.codecrafters/compile.sh

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+#!/bin/sh
+#
+# This script is used to compile your program on CodeCrafters
+#
+# This runs before .codecrafters/run.sh
+#
+# Learn more: https://codecrafters.io/program-interface
+
+set -e # Exit on failure
+
+cmake -B build -S . -DCMAKE_TOOLCHAIN_FILE=${VCPKG_ROOT}/scripts/buildsystems/vcpkg.cmake
+cmake --build ./build

compiled_starters/c/.codecrafters/run.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+#
+# This script is used to run your program on CodeCrafters
+#
+# This runs after .codecrafters/compile.sh
+#
+# Learn more: https://codecrafters.io/program-interface
+
+set -e # Exit on failure
+
+exec $(dirname "$0")/build/kafka "$@"

compiled_starters/c/.gitattributes

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+* text=auto

compiled_starters/c/.gitignore

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+# Prerequisites
+*.d
+
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Linker output
+*.ilk
+*.map
+*.exp
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
+*.su
+*.idb
+*.pdb
+
+# Kernel Module Compile Results
+*.mod*
+*.cmd
+.tmp_versions/
+modules.order
+Module.symvers
+Mkfile.old
+dkms.conf
+
+build
+vcpkg_installed

compiled_starters/c/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.13)
+
+project(codecrafters-kafka)
+
+file(GLOB_RECURSE SOURCE_FILES src/*.c src/*.h)
+
+set(CMAKE_C_STANDARD 23) # Enable the C23 standard
+
+add_executable(kafka ${SOURCE_FILES})

compiled_starters/c/README.md

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+![progress-banner](https://codecrafters.io/landing/images/default_progress_banners/kafka.png)
+
+This is a starting point for C solutions to the
+["Build Your Own Kafka" Challenge](https://codecrafters.io/challenges/kafka).
+
+In this challenge, you'll build a toy Kafka clone that's capable of accepting
+and responding to ApiVersions & Fetch API requests. You'll also learn about
+encoding and decoding messages using the Kafka wire protocol. You'll also learn
+about handling the network protocol, event loops, TCP sockets and more.
+
+**Note**: If you're viewing this repo on GitHub, head over to
+[codecrafters.io](https://codecrafters.io) to try the challenge.
+
+# Passing the first stage
+
+The entry point for your Kafka implementation is in `src/main.c`. Study and
+uncomment the relevant code, and push your changes to pass the first stage:
+
+```sh
+git commit -am "pass 1st stage" # any msg
+git push origin master
+```
+
+That's all!
+
+# Stage 2 & beyond
+
+Note: This section is for stages 2 and beyond.
+
+1. Ensure you have `cmake` installed locally
+1. Run `./your_program.sh` to run your Kafka broker, which is implemented in
+   `src/main.c`.
+1. Commit your changes and run `git push origin master` to submit your solution
+   to CodeCrafters. Test output will be streamed to your terminal.

compiled_starters/c/codecrafters.yml

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+# Set this to true if you want debug logs.
+#
+# These can be VERY verbose, so we suggest turning them off
+# unless you really need them.
+debug: false
+
+# Use this to change the C version used to run your code
+# on Codecrafters.
+#
+# Available versions: c-23
+buildpack: c-23

compiled_starters/c/src/main.c

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+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/ip.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+
+int main(int argc, char* argv[]) {
+	// Disable output buffering
+	setbuf(stdout, NULL);
+ 	setbuf(stderr, NULL);
+	
+	int server_fd, client_addr_len;
+	struct sockaddr_in client_addr;
+	
+	server_fd = socket(AF_INET, SOCK_STREAM, 0);
+	if (server_fd < 0) {
+		printf("Socket creation failed: %s...\n", strerror(errno));
+		return 1;
+	}
+	
+	// Since the tester restarts your program quite often, setting SO_REUSEADDR
+	// ensures that we don't run into 'Address already in use' errors
+	int reuse = 1;
+	if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0) {
+		printf("SO_REUSEADDR failed: %s \n", strerror(errno));
+		return 1;
+	}
+	
+	struct sockaddr_in serv_addr = {
+		.sin_family = AF_INET,
+		.sin_port = htons(9092),
+		.sin_addr = { htonl(INADDR_ANY) },
+	};
+	
+	if (bind(server_fd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) != 0) {
+		printf("Bind failed: %s \n", strerror(errno));
+		return 1;
+	}
+	
+	int connection_backlog = 5;
+	if (listen(server_fd, connection_backlog) != 0) {
+		printf("Listen failed: %s \n", strerror(errno));
+		return 1;
+	}
+	
+	printf("Waiting for a client to connect...\n");
+	client_addr_len = sizeof(client_addr);
+
+    // You can use print statements as follows for debugging, they'll be visible when running tests.
+	printf("Logs from your program will appear here!\n");
+
+    // TODO: Uncomment the code below to pass the first stage
+	//
+	// int client_fd = accept(server_fd, (struct sockaddr *) &client_addr, &client_addr_len);
+	// printf("Client connected\n");
+	// close(client_fd);
+	
+	close(server_fd);
+	return 0;
+}

compiled_starters/c/vcpkg-configuration.json

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+{
+  "default-registry": {
+    "kind": "git",
+    "baseline": "c4af3593e1f1aa9e14a560a09e45ea2cb0dfd74d",
+    "repository": "https://github.com/microsoft/vcpkg"
+  },
+  "registries": [
+    {
+      "kind": "artifact",
+      "location": "https://github.com/microsoft/vcpkg-ce-catalog/archive/refs/heads/main.zip",
+      "name": "microsoft"
+    }
+  ]
+}

compiled_starters/c/vcpkg.json

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+{
+  "dependencies": []
+}