1 files changed, 70 insertions, 0 deletions
diff --git a/linux.c b/linux.c
new file mode 100644
index 0000000..ff20e92
--- /dev/null
+++ b/linux.c
@@ -0,0 +1,70 @@
+#include "sys.h"
+#include "macros.h"
+#include <sys/mman.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+
+void *sys_alloc(u64 length)
+{
+	assert(length);
+	i32 prot = PROT_READ | PROT_WRITE;
+	i32 flags = MAP_PRIVATE|MAP_ANONYMOUS;
+	void *result = mmap(0, length, prot, flags, -1, 0);
+	return result;
+}
+
+void sys_free(void *memory, u64 length)
+{
+	assert(memory);
+	assert(length);
+	munmap(memory, length);
+}
+
+void die(const char *format, ...)
+{
+	va_list args;
+	va_start(args, format);
+	fprintf(stderr, "error: ");
+	vfprintf(stderr, format, args);
+	fprintf(stderr, "\n");
+	va_end(args);
+	_exit(1);
+}
+
+void info(const char *format, ...)
+{
+	va_list args;
+	va_start(args, format);
+	vprintf(format, args);
+	putchar('\n');
+	va_end(args);
+}
+
+char *read_entire_file(struct arena *arena, u64 *len, const char *filename)
+{
+	FILE *file = fopen(filename, "rb");
+	if (!file)
+		return 0;
+	if (fseek(file, 0, SEEK_END) == -1)
+		goto error;
+	i64 n = ftell(file);
+	if (n <= 0)
+		goto error;
+	if (len)
+		*len = n;
+	if (fseek(file, 0, SEEK_SET) == -1)
+		goto error;
+	char *buffer = push_arena(arena, n + 1);
+	if (!fread(buffer, 1, n, file)) {
+		pop_arena(arena, n + 1);
+		goto error;
+	}
+	fclose(file);
+	buffer[n] = 0;
+	return buffer;
+error:
+	fclose(file);
+	return 0;
+}