move from imgui to CLAY

src/base/base_strings.h

@@ -0,0 +1,49 @@
+#pragma once
+// base_strings.h - Simple length-delimited string type
+// Inspired by raddebugger's String8
+
+#include "base/base_core.h"
+
+////////////////////////////////
+// String types
+
+struct Str8 {
+    const char *str;
+    U64         size;
+};
+
+struct Str8Node {
+    Str8Node *next;
+    Str8      string;
+};
+
+struct Str8List {
+    Str8Node *first;
+    Str8Node *last;
+    U64       count;
+    U64       total_size;
+};
+
+////////////////////////////////
+// Forward declaration for Arena
+struct Arena;
+
+////////////////////////////////
+// Constructors
+
+static inline Str8 str8(const char *s, U64 len)  { return {s, len}; }
+static inline Str8 str8_cstr(const char *s)       { return {s, s ? (U64)strlen(s) : 0}; }
+static inline Str8 str8_lit(const char *s)         { return {s, s ? (U64)strlen(s) : 0}; }
+static inline B32  str8_match(Str8 a, Str8 b) {
+    if (a.size != b.size) return 0;
+    return MemoryCompare(a.str, b.str, a.size) == 0;
+}
+static inline B32 str8_is_empty(Str8 s) { return s.size == 0 || s.str == nullptr; }
+
+////////////////////////////////
+// String operations (require arena)
+
+Str8 str8_pushf(Arena *arena, const char *fmt, ...);
+Str8 str8_push_copy(Arena *arena, Str8 s);
+
+void str8_list_push(Arena *arena, Str8List *list, Str8 s);