From 1d1b28c294143f7a918db7a646b5564674616e44 Mon Sep 17 00:00:00 2001
From: tslil <tslil@posteo.de>
Date: Fri, 7 May 2021 22:19:31 -0400
Subject: quick hach

---
 Makefile          |  4 ++--
 include/actions.c |  6 +++---
 include/actions.h |  2 +-
 include/negamax.c |  2 +-
 src/pptdb.c       | 37 ++++++++++++++++++++++++++++++++-----
 5 files changed, 39 insertions(+), 12 deletions(-)

diff --git a/Makefile b/Makefile
index 8b4ab58..af483bf 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ IDIR=include
 DEFINES=-DDETERMINISTIC
 CFLAGS=-O3 -Wall -Wextra -Wpedantic -std=c99 -D_DEFAULT_SOURCE $(DEFINES) -I$(IDIR)
 
-CTAK=include/tak.c
+CTAK=include/tak.c include/actions.c
 CTAK_OBJS=$(CTAK:.c=.o)
 SRCS=$(filter-out include/lcdlib.c,$(wildcard include/*.c))
 OBJS=$(SRCS:.c=.o)
@@ -23,7 +23,7 @@ cttei: src/cttei.o $(OBJS)
 	$(CC) $(CFLAGS) src/cttei.o $(OBJS) -o cttei
 
 pptdb: src/pptdb.o $(CTAK_OBJS)
-	$(CC) $(CFLAGS) src/pptdb.o $(CTAK_OBJS) -o pptdb
+	$(CC) $(CFLAGS) src/pptdb.o $(CTAK_OBJS) -o pptdb -lm
 
 clean:
 	rm -f ctlm ct1986 cttei pptdb
diff --git a/include/actions.c b/include/actions.c
index 374f4f9..6c2eb8c 100644
--- a/include/actions.c
+++ b/include/actions.c
@@ -80,9 +80,9 @@ void action_list_free(action_list_t *list) {
 // Keep track of move offsets
 int8_t move_deltas[4];
 
-void action_list_init(void) {
-	move_deltas[0] = +board_size;
-	move_deltas[1] = -board_size;
+void action_list_init(const uint8_t size) {
+	move_deltas[0] = +size;
+	move_deltas[1] = -size;
 	move_deltas[2] = -1;
 	move_deltas[3] = +1;
 }
diff --git a/include/actions.h b/include/actions.h
index 75c881e..de64b71 100644
--- a/include/actions.h
+++ b/include/actions.h
@@ -64,7 +64,7 @@ extern int8_t move_deltas[4];
 // Methods
 // ===================================================================
 
-void action_list_init(void);
+void action_list_init(const uint8_t size);
 void action_list_free(action_list_t *list);
 action_list_t *action_list_generate(void);
 
diff --git a/include/negamax.c b/include/negamax.c
index a970b83..e83d43b 100644
--- a/include/negamax.c
+++ b/include/negamax.c
@@ -40,7 +40,7 @@ static float negamax(const uint8_t cur_depth, const uint8_t init_depth,
 
 void negamax_init(const uint8_t new_board_size) {
 	board_size = new_board_size;
-	action_list_init();
+	action_list_init(new_board_size);
 	zobrist_init();
 	tt_init();
 }
diff --git a/src/pptdb.c b/src/pptdb.c
index 79f60c5..f3d19bf 100644
--- a/src/pptdb.c
+++ b/src/pptdb.c
@@ -23,6 +23,9 @@
 #include <string.h>
 
 #include <tak.h>
+#include <actions.h>
+
+#include <math.h>
 
 int generate;
 uint64_t heights[16];
@@ -74,15 +77,22 @@ write_input(const int dx, const int dy, const uint8_t swap) {
 
 // Warning: performs _no_ checks on input whatsoever
 static enum ACT_RESULT
-parse_line(const char *pt, const ssize_t read) {
+parse_line(const char *pt, const ssize_t read, float *out_avg_actions) {
 	ssize_t idx;
 	enum ACT_RESULT r;
 	int total_plies = 0;
 
+	float avg_actions = 0;
+	action_list_t *actions;
+
 	for (idx=0;idx<read;idx++) {
 		if (pt[idx]==',') total_plies++;
 	}
 	for(idx=0;;) {
+		actions = action_list_generate();
+		avg_actions += (float)(actions->length);
+		action_list_free(actions);
+
 		if (pt[idx] == 'P') {
 			// P [A-F][1-6] [CF]?,
 			idx+=2;
@@ -142,9 +152,12 @@ parse_line(const char *pt, const ssize_t read) {
 		}
 		// Parse next action
 		while (idx<read && pt[idx++]!=',');
-		if (idx>=read) return ACT_OK;
+		if (idx>=read) goto count_this;
 		next_ply();
 	}
+ count_this:
+	avg_actions /= (float) total_plies;
+	*out_avg_actions = avg_actions;
 	return ACT_OK;
 }
 
@@ -172,6 +185,11 @@ int main(int argc, char **argv) {
 
 	const uint8_t size = argv[1][0]-'0';
 
+#define LAZY_MAX_GAMES 1000000
+	float avg_actions[LAZY_MAX_GAMES];
+	for (uint32_t k=0; k<LAZY_MAX_GAMES; k++) avg_actions[k]=0;
+	action_list_init(size);
+
 	playtak_fh = fopen(argv[2], "r");
 	if (playtak_fh == NULL) exit(EXIT_FAILURE);
 
@@ -190,7 +208,7 @@ int main(int argc, char **argv) {
 		if (line[read-4] == '0') outcome_black = 0.9;
 		else outcome_black = -0.9;
 		// Parse the line
-		r = parse_line(line,read-4);
+		r = parse_line(line,read-4, avg_actions+games);
 		// Adjust counts if we're not generating training data
 		if (generate == 0) {
 			if (r == ACT_ILLEGAL) {
@@ -227,16 +245,25 @@ int main(int argc, char **argv) {
 	printf("Read %d games\n",games);
 
 	if (generate==0) {
+		float sum = 0;
+		for (uint32_t k=0; k<games; k++) sum+=avg_actions[k];
+		const float mean = sum/(float)games;
+		float variance = 0;
+		for (uint32_t k=0; k<games; k++) variance+=(avg_actions[k]-mean)*(avg_actions[k]-mean);
+		variance /= (float) games;
+
 		printf("Illegals:  %d\nOverflows: %d\n\
 Black wins: %.3f%%\n\
 Road wins: %d\nFlat wins: %d\n\
 Average turns to road win: %.3f\n\
-Average turns to flat win: %.3f\n",
+Average turns to flat win: %.3f\n\
+Mean avaiable actions per ply per game: %.3f ± %.3f σ\n",
 					 illegal, overflow,
 					 (double)black_wins / (double)(black_wins+white_wins) * 100,
 					 road_wins, flat_wins,
 					 (double)(road_turns)/(double)(road_wins),
-					 (double)(flat_turns)/(double)(flat_wins));
+					 (double)(flat_turns)/(double)(flat_wins),
+					 mean, sqrt(variance));
 		for (int k = 2; k < 16; k++) {
 			printf("Height %2d: %7ld\n",k,heights[k]);
 		}
-- 
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