WIP

Makefile

@@ -1,7 +1,7 @@
 CC=riscv64-unknown-elf-gcc
 AS=riscv64-unknown-elf-as
 ASFLAGS=-g -mabi=ilp32e -march=rv32ec
-CFLAGS=$(ASFLAGS)
+CFLAGS=$(ASFLAGS) -Os -Wall -std=c99
 LD=riscv64-unknown-elf-ld
 export JQ?=jaq
 export QEMU?=qemu-riscv32
@@ -11,7 +11,7 @@ TEST_SRC := $(shell find tests -name '*.s')
 # Replace .s with .elf
 TESTS := $(patsubst %.s,%.elf,$(TEST_SRC))
 
-all: calc.elf
+all: calc.elf tests
 
 check: tests
 	@tests/unittest

calc.h

@@ -2,6 +2,9 @@
 #define CALC_H
 
 typedef unsigned char bool;
+#define true 1;
+#define false 0;
+
 typedef unsigned char u8;
 typedef unsigned int uint;
 

tests/charness.c

@@ -1,11 +1,43 @@
 #include "../calc.h"
 
-// TODO: make these pascal strings
-extern bool streq(u8 *, uint, u8 *, uint);
+#define BUF_SIZE 80
+
+#define make_str(s) { sizeof(s), (const u8 *)s }
+#define make_test(name) { make_str(#name), name }
+
+extern bool streq(const u8 *, uint, const u8 *, uint);
 extern int read(u8 *, uint); // read from stdin
 
+// Tests
+extern void count_digits(void);
+extern void fmt_decimal(void);
+
+typedef struct {
+  u8 len;
+  const u8 *data;
+} str;
+
+typedef void (*testfn)(void);
+
+typedef struct {
+  str name;
+  testfn fn;
+} test;
+
+static str tests[2] = {make_test(count_digits), make_test(fmt_decimal)};
+
 void _start(void) {
-  
+        u8 buf[BUF_SIZE];
+        int nread0 = read(buf, BUF_SIZE);
+        if (nread0 < 0) {
+                for(;;); // TODO: add abort function
+        }
+        uint nread = (uint)nread0;
 
+        for(uint i = 0; i < sizeof(tests); i++) {
+                const str s = tests[i];
+                if (streq(buf, nread, s.data, s.len)) {
+                    
+                }
+        }
 }
-