initial commit.

src/lgl_shader_tools.cpp

@@ -0,0 +1,47 @@
+//#include <GLFW/glfw3.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <cassert>
+#include <stdlib.h>
+#include <sys/stat.h>
+
+
+#define CONST_READSHADER_MAX_FN_LEN 256
+#define CONST_READSHADER_MAX_FN_SIZE 32*1024
+char *readshader(const char *fn) {
+	char shader_fn[CONST_READSHADER_MAX_FN_LEN];
+	assert(strlen(fn) + 9 < CONST_READSHADER_MAX_FN_LEN);
+	struct stat status_buffer;
+
+	snprintf(shader_fn, CONST_READSHADER_MAX_FN_LEN, "shaders/%s", fn);
+
+	printf("%s\n", shader_fn);
+
+	if (stat(shader_fn, &status_buffer) == -1) {
+		printf("Failed to stat file '%s'\n", shader_fn);
+		return NULL;
+	}
+	assert(status_buffer.st_size < CONST_READSHADER_MAX_FN_SIZE-1);
+
+	FILE *fh = fopen(shader_fn, "r");
+	assert(fh != NULL);
+
+	char *shader_data = (char *)malloc(CONST_READSHADER_MAX_FN_SIZE);
+	assert(shader_data != NULL);
+
+	size_t read_bytes = fread((void *)shader_data, sizeof(char), 
+		CONST_READSHADER_MAX_FN_SIZE-1, fh);
+	assert(read_bytes < CONST_READSHADER_MAX_FN_SIZE-1);
+	shader_data[read_bytes] = '\0';
+
+	fclose(fh);
+	
+	return shader_data;
+}
+
+void freeshader(void *shader_fh) {
+	assert(shader_fh != NULL);
+	free(shader_fh);
+}
+