From 02484902ee864998b45e6fab8106b576bf3abac3 Mon Sep 17 00:00:00 2001
From: a dinosaur <dino@a-dinosaur.com>
Date: Tue, 12 Mar 2024 20:12:26 +1100
Subject: [PATCH] c99 conversion

---
 CMakeLists.txt             |  6 +++---
 Lesson10.cpp => Lesson10.c | 11 ++++++-----
 2 files changed, 9 insertions(+), 8 deletions(-)
 rename Lesson10.cpp => Lesson10.c (98%)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fe311d9..6ee6460 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,12 +1,12 @@
 cmake_minimum_required(VERSION "3.5" FATAL_ERROR)
-project(Lesson10 LANGUAGES CXX)
+project(Lesson10 LANGUAGES C)
 
 find_package(SDL3 REQUIRED CONFIG)
 find_package(OpenGL REQUIRED)
 
-add_executable(Lesson10 Lesson10.cpp)
+add_executable(Lesson10 Lesson10.c)
 set_target_properties(Lesson10 PROPERTIES
-	CXX_STANDARD 98
+	C_STANDARD 99
 	WIN32_EXECUTABLE ON)
 target_link_libraries(Lesson10 SDL3::SDL3 OpenGL::GL)
 target_compile_options(Lesson10 PRIVATE $<$<CXX_COMPILER_ID:GNU>:-Wall -Wextra -pedantic>)
diff --git a/Lesson10.cpp b/Lesson10.c
similarity index 98%
rename from Lesson10.cpp
rename to Lesson10.c
index 27aaf65..22925ff 100644
--- a/Lesson10.cpp
+++ b/Lesson10.c
@@ -9,6 +9,7 @@
 #include <math.h>              // Math Library Header File
 #include <stdio.h>             // Header File For Standard Input/Output
 #include <stdlib.h>
+#include <stdbool.h>
 #include <SDL3/SDL.h>
 #include <SDL3/SDL_main.h>
 #include <SDL3/SDL_opengl.h>   // Header File For The OpenGL32 Library
@@ -90,7 +91,7 @@ void SetupWorld()
 	readstr(filein, oneline);
 	sscanf(oneline, "NUMPOLLIES %d\n", &numtriangles);
 
-	sector1.triangle = new TRIANGLE[numtriangles];
+	sector1.triangle = malloc(sizeof(TRIANGLE) * numtriangles);
 	sector1.numtriangles = numtriangles;
 	for (int loop = 0; loop < numtriangles; loop++)
 	{
@@ -118,11 +119,11 @@ bool FlipSurface(SDL_Surface *surface)
 
 	const int pitch = surface->pitch;
 	const int numrows = surface->h;
-	unsigned char *pixels = (unsigned char*)surface->pixels;
-	unsigned char *tmprow = new unsigned char[pitch];
+	unsigned char *pixels = (unsigned char *)surface->pixels;
+	unsigned char *tmprow = malloc(sizeof(unsigned char) * pitch);
 
 	unsigned char *row1 = pixels;
-	unsigned char *row2 = pixels + (numrows- 1) * pitch;
+	unsigned char *row2 = pixels + (numrows - 1) * pitch;
 	for (int i = 0; i < numrows / 2; ++i)
 	{
 		// Swap rows
@@ -134,7 +135,7 @@ bool FlipSurface(SDL_Surface *surface)
 		row2 -= pitch;
 	}
 
-	delete[] tmprow;
+	free(tmprow);
 	SDL_UnlockSurface(surface);
 	return true;
 }