1 files changed, 48 insertions, 0 deletions
diff --git a/system.old/libraries/string/builder.zig b/system.old/libraries/string/builder.zig
new file mode 100644
index 0000000..16bd35c
--- /dev/null
+++ b/system.old/libraries/string/builder.zig
@@ -0,0 +1,48 @@
+//! String building
+
+pub fn build(buf: []u8, parts: anytype) []const u8 {
+    var pos: usize = 0;
+    inline for (parts) |part| {
+        for (part) |c| {
+            if (pos >= buf.len) break;
+            buf[pos] = c;
+            pos += 1;
+        }
+    }
+    return buf[0..pos];
+}
+
+pub fn concat(buf: []u8, a: []const u8, b: []const u8) []const u8 {
+    var pos: usize = 0;
+    for (a) |c| {
+        if (pos >= buf.len) break;
+        buf[pos] = c;
+        pos += 1;
+    }
+    for (b) |c| {
+        if (pos >= buf.len) break;
+        buf[pos] = c;
+        pos += 1;
+    }
+    return buf[0..pos];
+}
+
+pub fn concat3(buf: []u8, a: []const u8, b: []const u8, c: []const u8) []const u8 {
+    var pos: usize = 0;
+    for (a) |ch| {
+        if (pos >= buf.len) break;
+        buf[pos] = ch;
+        pos += 1;
+    }
+    for (b) |ch| {
+        if (pos >= buf.len) break;
+        buf[pos] = ch;
+        pos += 1;
+    }
+    for (c) |ch| {
+        if (pos >= buf.len) break;
+        buf[pos] = ch;
+        pos += 1;
+    }
+    return buf[0..pos];
+}