From 827be7304a4c40b6465951e55195caab1d666f86 Mon Sep 17 00:00:00 2001
From: Paul Duncan <pabs@pablotron.org>
Date: Thu, 21 Jun 2018 15:55:20 -0400
Subject: add test_execute_steps(), Makefile

---
 .gitignore |   3 ++
 Makefile   |  19 ++++++++++
 test.c     | 117 +++++++++++++++++++++++++++++++++++++++++++++++--------------
 3 files changed, 113 insertions(+), 26 deletions(-)
 create mode 100644 Makefile

diff --git a/.gitignore b/.gitignore
index 2e1f048..599400f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,5 @@
 gb.c
 *.o
+test
+*.gb
+out.png
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..79cc3c5
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,19 @@
+OBJS=gb.o test.o lodepng.o
+CFLAGS=-W -Wall -pedantic -Werror -Wextra -std=c11 -O3
+APP=./test
+
+.PHONY=all clean test
+
+all: $(APP)
+
+gb.c: ops.yaml
+	./gen.rb > gb.c
+
+$(APP): $(OBJS)
+	$(CC) -o $(APP) $(OBJS)
+
+%.o: %.c gb.h
+	$(CC) -c $(CFLAGS) $<
+
+clean:
+	$(RM) $(OBJS) $(APP)
diff --git a/test.c b/test.c
index 32f0474..247529c 100644
--- a/test.c
+++ b/test.c
@@ -10,6 +10,7 @@
 #include "gb.h"
 
 #define NUM_FRAMES 600
+#define NUM_STEPS 100
 
 static uint32_t
 file_size(
@@ -60,35 +61,99 @@ load(
 // buffer for rendered frames
 static uint8_t frames[NUM_FRAMES * GB_FRAME_SIZE];
 
-int main(int argc, char *argv[]) {
-  for (int i = 1; i < argc; i++) {
-    uint32_t rom_size = 0;
-    const uint8_t *rom_data = load(argv[i], &rom_size);
-    fprintf(stderr, "loaded \"%s\" (%u bytes)\n", argv[i], rom_size);
-
-    gb_t ctx;
-    gb_init(&ctx, rom_data, rom_size);
-    fprintf(stderr, "gb context initialized\n");
-
-    // render several frames
-    for (size_t j = 0; j < NUM_FRAMES; j++) {
-      // render frame
-      gb_frame(&ctx);
-
-      // copy frame to buffer
-      memcpy(frames + GB_FRAME_SIZE * j, gb_get_rgb_frame(&ctx), GB_FRAME_SIZE);
-    }
+static void
+test_render_frames(
+  const char * const png_path,
+  const char * const rom_path
+) {
+  // load rom data
+  uint32_t rom_size = 0;
+  const uint8_t *rom_data = load(rom_path, &rom_size);
+  fprintf(stderr, "loaded \"%s\" (%u bytes)\n", rom_path, rom_size);
+
+  // init context
+  gb_t ctx;
+  gb_init(&ctx, rom_data, rom_size);
+  fprintf(stderr, "gb context initialized\n");
+
+  // render frames
+  for (size_t j = 0; j < NUM_FRAMES; j++) {
+    // render frame
+    gb_frame(&ctx);
+
+    // copy frame to buffer
+    memcpy(frames + GB_FRAME_SIZE * j, gb_get_rgb_frame(&ctx), GB_FRAME_SIZE);
+  }
 
-    // save png
-    if (lodepng_encode24_file("out.png", frames, 160, 144 * NUM_FRAMES)) {
-      fprintf(stderr, "lode_png_encode24_file() failed\n");
-      return EXIT_FAILURE;
-    }
+  // save png
+  if (lodepng_encode24_file(png_path, frames, 160, 144 * NUM_FRAMES)) {
+    fprintf(stderr, "lode_png_encode24_file() failed\n");
+    exit(EXIT_FAILURE);
+  }
+  fprintf(stderr, "%d frames rendered\n", NUM_FRAMES);
 
-    fprintf(stderr, "%d frames rendered\n", NUM_FRAMES);
+  // free rom data
+  free((void*) rom_data);
+}
 
-    // free rom data
-    free((void*) rom_data);
+const char * const RWS[] = {
+  "AF",
+  "BC",
+  "DE",
+  "HL",
+  "SP",
+  "PC",
+  NULL
+};
+
+static void
+gb_dump_context(
+  const gb_t * const ctx
+) {
+  for (int i = 0; RWS[i]; i++) {
+    printf("%s%s: 0x%04x", (!i) ? "" : ", ", RWS[i], ctx->cpu.rs[i]);
+  }
+  printf("\n");
+}
+
+static void
+test_execute_steps(
+  const char * const rom_path
+) {
+  // load rom data
+  uint32_t rom_size = 0;
+  const uint8_t *rom_data = load(rom_path, &rom_size);
+  fprintf(stderr, "loaded \"%s\" (%u bytes)\n", rom_path, rom_size);
+
+  // init context
+  gb_t ctx;
+  gb_init(&ctx, rom_data, rom_size);
+  fprintf(stderr, "gb context initialized\n");
+
+  // render frames
+  for (size_t j = 0; j < NUM_STEPS; j++) {
+    // render frame
+    gb_step(&ctx);
+
+    // render frame
+    gb_dump_context(&ctx);
+  }
+
+  // free rom data
+  free((void*) rom_data);
+}
+
+int main(int argc, char *argv[]) {
+  // render 600 frames
+  for (int i = 2; i < argc; i++) {
+    if (argv[1][0] == 'f') {
+      test_render_frames("out.png", argv[i]);
+    } else if (argv[1][0] == 'e') {
+      test_execute_steps(argv[i]);
+    } else {
+      fprintf(stderr, "unknown test: %s\n", argv[i]);
+      exit(EXIT_FAILURE);
+    }
   }
 
   // return success
-- 
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