string_dup and string_len

2 files changed, 18 insertions, 0 deletions

diff --git a/standard.c b/standard.c
index 96677ea..afe6ad4 100644
--- a/standard.c
+++ b/standard.c
@@ -1,4 +1,5 @@
 #include "maths.h"
+#include "memory.h"
 #include "standard.h"
 
 int string_equal(const char* a, const char* b) {
@@ -17,6 +18,19 @@ int string_copy(char* dst, const char* src) {
 	return i;
 }
 
+int string_len(const char* s) {
+	int l;
+	for (l = 0; *s; s++, l++);
+	return l;
+}
+
+char* dup_string(Arena* a, const char* s) {
+	int size = string_len(s) + 1;
+	char* d = arena_alloc_aligned(a, size, 1);
+	string_copy(d, s);
+	return d;
+}
+
 int int_to_buf(int n, char* buf) {
 	int i, sign, t;
 	unsigned n1;
diff --git a/standard.h b/standard.h
index 8d58e78..2f82e40 100644
--- a/standard.h
+++ b/standard.h
@@ -3,8 +3,12 @@
 
 #define no_mangle extern "C"
 
+struct Arena;
+
 int string_equal(const char* a, const char* b);
 int string_copy(char* dst, const char* src);
+int string_len(const char* s);
+char* dup_string(struct Arena* a, const char* s);
 
 /* Not safe! */
 int f_to_buf(int f, char* buf);