Adding src so far

.gitignore

@@ -1,90 +1,12 @@
 # ---> C
-# Prerequisites
-*.d
-
 # Object files
-*.o
+build/
-*.ko
-*.obj
-*.elf
-
-# Linker output
-*.ilk
-*.map
-*.exp
-
-# Precompiled Headers
-*.gch
-*.pch
 
 # Libraries
-*.lib
+lib/
-*.a
-*.la
-*.lo
-
-# Shared objects (inc. Windows DLLs)
-*.dll
-*.so
-*.so.*
-*.dylib
 
 # Executables
-*.exe
+targets/
-*.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
-
-# ---> C++
-# Prerequisites
-*.d
-
-# Compiled Object files
-*.slo
-*.lo
-*.o
-*.obj
-
-# Precompiled Headers
-*.gch
-*.pch
-
-# Compiled Dynamic libraries
-*.so
-*.dylib
-*.dll
-
-# Fortran module files
-*.mod
-*.smod
-
-# Compiled Static libraries
-*.lai
-*.la
-*.a
-*.lib
-
-# Executables
-*.exe
-*.out
-*.app
 
 # ---> Gradle
 .gradle
@@ -120,9 +42,6 @@ gradle-app.setting
 # Local History for Visual Studio Code
 .history/
 
-# Built Visual Studio Code Extensions
-*.vsix
-
 # ---> Bazel
 # gitignore template for Bazel build system
 # website: https://bazel.build/
@@ -137,4 +56,3 @@ gradle-app.setting
 /.ijwb/
 /.aswb/
 /.clwb/
-

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "C_Cpp.default.cStandard": "c17"
+}

Makefile

@@ -0,0 +1,24 @@
+CFLAGS = -std=c17
+CPPFLAGS = -std=c++17
+APPS_DIR = ./apps
+TARGETS_DIR = ./targets
+OBJECTS_DIR = ./build
+LIBS_DIR = ./src
+INCLUDES = -I ./include
+TESTS_DIR = ./tests
+VPATH = $(TARGETS_DIR) $(OBJECTS_DIR) $(APPS_DIR) $(LIBS_DIR) $(TESTS_DIR)
+
+main: main.c requests.o
+	cc $(CFLAGS) $(INCLUDES) -lcurl $(APPS_DIR)/main.c $(LIBS_DIR)/requests.c -o $(TARGETS_DIR)/main
+
+requests.o: requests.c
+	$(CC) $(CFLAGS) $(INCLUDES) -c $(LIBS_DIR)/requests.c -o $(OBJECTS_DIR)/requests.o
+
+test: test_requests
+	$(TARGETS_DIR)/test_requests
+
+test_requests: test_requests.cpp requests.o
+	$(CXX) $(CPPFLAGS) $(INCLUDES) -lcurl -lgtest -lgtest_main $(TESTS_DIR)/test_requests.cpp $(OBJECTS_DIR)/requests.o -o $(TARGETS_DIR)/test_requests
+
+clean:
+	rm $(TARGETS_DIR)/* $(OBJECTS_DIR)/*

README.md

@@ -1,3 +1,14 @@
 # c-rss
 
 An RSS feed reader written in C
+
+I am re-learning C by writing an RSS feed reader from scratch. I plan on playing around with several build tools such as make, gradle, and bazel.
+
+## Goals
+
+* get better at C
+* get better at Makefiles
+* learn how to write gradle plugins
+* get better at SQL
+* compare make, gradle, and bazel
+* learn how to use gtest for C projects

apps/main.c

@@ -0,0 +1,11 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "requests.h"
+
+int main(void) {
+    printf("Hello, world!\n");
+    requestInit();
+    requestGet("https://google.com");
+    requestCleanup();
+}

include/requests.h

@@ -0,0 +1,28 @@
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stddef.h>
+
+#ifndef __SHILLERBEN_REQUESTS__
+#define __SHILLERBEN_REQUESTS__
+
+typedef struct GetRequestResult GetRequestResult;
+struct GetRequestResult {
+    int errorCode;
+    size_t size;
+    size_t capacity;
+    char *data;
+};
+
+void requestsInit(void);
+void requestsCleanup(void);
+GetRequestResult requestGet(const char* url);
+
+size_t _getRequestCb(char *buffer, size_t size, size_t nmemb, GetRequestResult *result);
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif

src/requests.c

@@ -0,0 +1,73 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <curl/curl.h>
+
+#include "requests.h"
+
+void requestsInit(void) {
+    curl_global_init(CURL_GLOBAL_DEFAULT);
+}
+
+void requestsCleanup(void) {
+    curl_global_cleanup();
+}
+
+GetRequestResult requestGet(const char* url) {
+    printf("requestGet(%s)\n", url);
+
+    GetRequestResult result = {
+        .errorCode = -1,
+        .data = NULL,
+    };
+
+    CURL *handle = curl_easy_init();
+    CURLcode err;
+
+    err = curl_easy_setopt(handle, CURLOPT_URL, url);
+    if (err) {
+        printf("Failed to set url\n");
+        return result;
+    }
+    err = curl_easy_setopt(handle, CURLOPT_WRITEFUNCTION, _getRequestCb);
+    if (err) {
+        printf("Failed to set callback function\n");
+        return result;
+    }
+    err = curl_easy_setopt(handle, CURLOPT_WRITEDATA, &result);
+    if (err) {
+        printf("Failed to set callback data\n");
+        return result;
+    }
+    result.errorCode = 0;
+    result.size = 0;
+    result.capacity = 1024;
+    result.data = calloc(1024, sizeof(char));
+    err = curl_easy_perform(handle);
+    if (err) {
+        printf("Error performing request\n");
+        result.errorCode = -1;
+        result.size = 0;
+        free(result.data);
+        result.data = NULL;
+        return result;
+    }
+    return result;
+}
+
+size_t _getRequestCb(char *buffer, size_t size, size_t nmemb, GetRequestResult *result) {
+    size_t numBytes = size * nmemb;
+    while (result->size + numBytes > result->capacity + 1 /*extra byte for null terminator*/) {
+        size_t newCapacity = result->capacity * 2;
+        char *newData = calloc(newCapacity, sizeof(char));
+        memcpy(newData, result->data, result->size);
+        free(result->data);
+        result->data = newData;
+        result->capacity = newCapacity;
+    }
+    memcpy(result->data + result->size, buffer, numBytes);
+    result->size += numBytes;
+    result->data[result->size] = '\0';
+    return numBytes;
+}

tests/test_requests.cpp

@@ -0,0 +1,16 @@
+#include <string>
+#include <gtest/gtest.h>
+
+#include "requests.h"
+
+TEST(RequestsTest, HttpsGetTest) {
+    requestsInit();
+    std::string expected = "<!DOCTYPE html>\n<html >\n<head><meta charset=\"utf-8\">\n<title>Ben Shiller</title>";
+    for (int i = 0; i < 10; ++i) {
+        GetRequestResult result = requestGet("https://shillerben.com");
+        // std::cout << "GET https://shillerben.com returned: " << result.data << '\n';
+        ASSERT_EQ(strncmp(result.data, expected.c_str(), expected.size()), 0);
+        free(result.data);
+    }
+    requestsCleanup();
+}