sloth context

3 files changed, 34 insertions, 0 deletions

diff --git a/main.c b/main.c
index 001f62d..ca14497 100644
--- a/main.c
+++ b/main.c
@@ -1,16 +1,24 @@
 #include "getln.h"
+#include "sloth.h"
 #include <stdlib.h>
 #include <stdio.h>
 
 int main(int argc, char **argv)
 {
 	(void)argc, (void)argv;
+	/* Initialize sloth. */
+	Sloth *const sloth = calloc(1, sizeof(Sloth));
+	if (sloth == NULL)
+		return 1;
 	/* Read stdin line by line until exhaustion. */
 	char *line = NULL;
 	while ((line = getln(stdin)) != NULL) {
 		printf("%s", line);
 		free(line);
 	}
+	/* Free everything. */
 	getln_cleanup();
+	sloth_deinit(sloth);
+	free(sloth);
 	return 0;
 }
diff --git a/sloth.c b/sloth.c
new file mode 100644
index 0000000..99222a9
--- /dev/null
+++ b/sloth.c
@@ -0,0 +1,10 @@
+#include "sloth.h"
+#include <stdlib.h>
+
+void sloth_deinit(Sloth *ctx)
+{
+	if (ctx->stack != NULL) {
+		free(ctx->stack);
+		ctx->stack = NULL;
+	}
+}
diff --git a/sloth.h b/sloth.h
new file mode 100644
index 0000000..9b30e93
--- /dev/null
+++ b/sloth.h
@@ -0,0 +1,16 @@
+#pragma once
+#include <stdint.h>
+#include <stddef.h>
+
+/* Replace '16' by desired byte size on both following lines. */
+#define SLOTH_BITS 16
+typedef uint16_t SlothByte;
+
+typedef struct Sloth {
+	SlothByte *stack;
+	size_t stack_size;
+	size_t stack_capacity;
+	SlothByte mem[1 << SLOTH_BITS];
+} Sloth;
+
+void sloth_deinit(Sloth *ctx);