From 2bc0161433869d21a8c99779f39ce2f932389ea0 Mon Sep 17 00:00:00 2001
From: kdx <kdx.42@42l.fr>
Date: Fri, 17 Mar 2023 06:28:35 +0100
Subject: generate static memory

---
 main.c   |  7 +++++++
 memory.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 memory.h |  9 +++++++++
 slice.c  | 18 ++++++++++++++++--
 slice.h  |  2 ++
 5 files changed, 93 insertions(+), 2 deletions(-)
 create mode 100644 memory.c
 create mode 100644 memory.h

diff --git a/main.c b/main.c
index ff6f17d..8fa5546 100644
--- a/main.c
+++ b/main.c
@@ -6,6 +6,7 @@
 #include "identify.h"
 #include "check.h"
 #include "scope.h"
+#include "memory.h"
 #include <stdio.h>
 #include <stdlib.h>
 
@@ -36,6 +37,7 @@ main(int argc, char **argv)
 
 	Token *tokens = lexer(slice);
 	if (tokens != NULL) {
+		Memory memory = {0};
 		destroy_duplicates(&tokens, TOK_END);
 		do {
 			if (group_scope(&tokens) ||
@@ -66,8 +68,13 @@ main(int argc, char **argv)
 			group->group.type = GROUP_SCOPE;
 			scope_extract(tokens);
 			scope_function(tokens);
+			if (memory_create(&memory, tokens)) {
+				fprintf(stderr, "memory_create failed\n");
+				break;
+			}
 			token_print(tokens, 1, 0);
 		} while(0);
+		memory_destroy(&memory);
 		token_destroy(tokens);
 	}
 
diff --git a/memory.c b/memory.c
new file mode 100644
index 0000000..b65ad42
--- /dev/null
+++ b/memory.c
@@ -0,0 +1,59 @@
+#include "memory.h"
+#include "slice.h"
+#include <stdlib.h>
+#include <stdio.h>
+
+static int
+strings_len(Token *list)
+{
+	int len = 0;
+	for (Token *e = list; e != NULL; e = e->next)
+		if (e->type == TOK_GROUP)
+			len += strings_len(e->group.tokens);
+		else if (e->type == TOK_STRING)
+			len += slice_len(e->slice) + 1;
+	return len;
+}
+
+static int
+strings_cat(char *mem, Token *list)
+{
+	int len = 0;
+	for (Token *e = list; e != NULL; e = e->next)
+		if (e->type == TOK_GROUP)
+			len += strings_cat(mem + len, e->group.tokens);
+		else if (e->type == TOK_STRING) {
+			slice_cpy(mem + len, e->slice);
+			len += slice_len(e->slice) + 1;
+		}
+	return len;
+}
+
+int
+memory_create(Memory *memory, Token *list)
+{
+	const int len = strings_len(list);
+	memory->strings = malloc(len);
+	if (memory->strings == NULL) {
+		perror("memory_create:malloc");
+		return 1;
+	}
+	const int cated = strings_cat(memory->strings, list);
+	if (cated != len) {
+		fprintf(stderr, "strings_cat wrote %d bytes instead of %d",
+		        cated, len);
+		free(memory->strings);
+		memory->strings = NULL;
+		return 1;
+	}
+	return 0;
+}
+
+void
+memory_destroy(Memory *memory)
+{
+	if (memory->strings != NULL) {
+		free(memory->strings);
+		memory->strings = NULL;
+	}
+}
diff --git a/memory.h b/memory.h
new file mode 100644
index 0000000..0b6f8e5
--- /dev/null
+++ b/memory.h
@@ -0,0 +1,9 @@
+#pragma once
+#include "token.h"
+
+typedef struct {
+	char *strings;
+} Memory;
+
+int memory_create(Memory *memory, Token *list);
+void memory_destroy(Memory *memory);
diff --git a/slice.c b/slice.c
index f2b64fc..d86a75e 100644
--- a/slice.c
+++ b/slice.c
@@ -37,8 +37,22 @@ slice_sub(Slice src, int begin, int end)
 int
 slice_equal(Slice s0, Slice s1)
 {
-	if (s0.end - s0.begin != s1.end - s1.begin)
+	if (slice_len(s0) != slice_len(s1))
 		return 0;
 	return 0 ==
-	       strncmp(s0.str + s0.begin, s1.str + s1.begin, s0.end - s0.begin);
+	       strncmp(s0.str + s0.begin, s1.str + s1.begin, slice_len(s0));
+}
+
+int
+slice_len(Slice slice)
+{
+	return slice.end - slice.begin;
+}
+
+void *
+slice_cpy(void *dest, Slice slice)
+{
+	memcpy(dest, slice.str + slice.begin, slice_len(slice));
+	((char*)dest)[slice_len(slice)] = '\0';
+	return dest;
 }
diff --git a/slice.h b/slice.h
index 0a69f78..2987f79 100644
--- a/slice.h
+++ b/slice.h
@@ -11,3 +11,5 @@ Slice slice_print(Slice slice);
 Slice slice_from_str(char *str);
 Slice slice_sub(Slice src, int begin, int end);
 int slice_equal(Slice s0, Slice s1);
+int slice_len(Slice slice);
+void *slice_cpy(void *dest, Slice slice);
-- 
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