From fdd8f1fe2d5ad5b0e09b00c919499d9fe9008c1f Mon Sep 17 00:00:00 2001
From: Anthony Wang
Date: Tue, 2 Jan 2024 19:25:44 -0600
Subject: Noninteractive mode

This mode accepts inputs with newlines and doesn't disable input buffering. This is useful for using SDC as a backend for GUIs such as https://git.exozy.me/a/SDGUI.
---
 sd.c | 37 +++++++++++++++++++++++++++----------
 1 file changed, 27 insertions(+), 10 deletions(-)

diff --git a/sd.c b/sd.c
index cd8195d..0e39156 100644
--- a/sd.c
+++ b/sd.c
@@ -10,19 +10,21 @@
 int main(int argc, char* argv[]) {
 	char *file = "cards";
 	bool verbose = false;
+	bool noninteractive = false;
 
 	/* Proccess args */
 	static struct option long_options[] = {
-		{"file",    required_argument, NULL, 'f'},
-		{"verbose", no_argument,       NULL, 'v'}
+		{"file",           required_argument, NULL, 'f'},
+		{"verbose",        no_argument,       NULL, 'v'},
+		{"noninteractive", no_argument,       NULL, 'n'}
 	};
 	while (true) {
-		int option_index = 0;
-		int c = getopt_long(argc, argv, "f:v", long_options, &option_index);
+		int c = getopt_long(argc, argv, "f:vn", long_options, NULL);
 		if (c == -1) break;
 		switch (c) {
 			case 'f': file = optarg; break;
 			case 'v': verbose = true; break;
+			case 'n': noninteractive = true; break;
 			default: abort();
 		}
 	}
@@ -54,9 +56,11 @@ int main(int argc, char* argv[]) {
 		printf("\n");
 	}
 
-	/* Disable input buffering */
-	assert(system("stty -F /dev/tty cbreak min 1") == 0);
-	assert(system("stty -F /dev/tty -echo") == 0);
+	if (!noninteractive) {
+		/* Disable input buffering */
+		assert(system("stty -F /dev/tty cbreak min 1") == 0);
+		assert(system("stty -F /dev/tty -echo") == 0);
+	}
 
 	while (true) {
 		/* Make sure sum of weights is positive */
@@ -76,14 +80,28 @@ int main(int argc, char* argv[]) {
 		sqlite3_bind_int(stmt, 1, i);
 		sqlite3_step(stmt);
 		printf("> %s\n", sqlite3_column_text(stmt, 0));
+		if (noninteractive) {
+			fflush(stdout);
+		}
 
 		/* Wait for confirmation */
-		char b = getchar();
+		getchar();
+		if (noninteractive) {
+			/* Skip newline */
+			getchar();
+		}
 		printf("%s\n", sqlite3_column_text(stmt, 1));
+		if (noninteractive) {
+			fflush(stdout);
+		}
 		sqlite3_finalize(stmt);
 
 		/* Read user input */
-		b = getchar();
+		char b = getchar();
+		if (noninteractive) {
+			/* Skip newline */
+			getchar();
+		}
 		if (b == 'y') w >>= 1;
 		else if (b == 'n') w <<= 3;
 		else break;
@@ -99,5 +117,4 @@ int main(int argc, char* argv[]) {
 
 	/* Cleanup */
 	sqlite3_close(db);
-	assert(system("stty -F /dev/tty echo") == 0);
 }
-- 
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