initial

1 files changed, 115 insertions, 0 deletions

diff --git a/prb_string.c b/prb_string.c
new file mode 100644
index 0000000..061731c
--- /dev/null
+++ b/prb_string.c
@@ -0,0 +1,115 @@
+Str8 str8(U8 *ptr, U64 length)
+{
+	Assert(ptr);
+	Str8 r = { ptr, length };
+	return r;
+}
+
+Str8 str8_range(U8 *start, U8 *end)
+{
+	Str8 r = { start, end-start };
+	return r;
+}
+
+Str8 str8_from_cstr(char *cstr)
+{
+	U8 *ptr = (U8 *)cstr;
+	for (; *ptr; ++ptr);
+	Str8 r = str8_range((U8 *)cstr, ptr);
+	return r;
+}
+
+char *str8_to_cstr(Arena *arena, Str8 s)
+{
+	U64 length = s.length+1;
+	char *r = arena_push(arena, length*sizeof(U8));
+	MemoryCopy(r, s.ptr, length*sizeof(U8));
+	*(r+s.length) = 0;
+	return r;
+}
+
+Str8 str8_chop_end(Str8 s, U64 count)
+{
+	U64 length = s.length-ClampTop(count, s.length);
+	Str8 r = str8(s.ptr, length);
+	return r;
+}
+
+Str8 str8_chop_start(Str8 s, U64 count)
+{
+	U64 clamped = ClampTop(count, s.length);
+	U64 length = s.length-ClampTop(count, s.length);
+	Str8 r = str8(s.ptr+clamped, length);
+	return r;
+}
+
+Str8 str8_pushfv(Arena *arena, char *fmt, va_list args)
+{
+	Str8 r = {0};
+
+	va_list args2;
+	va_copy(args2, args);
+
+	U32 buf_size = 1024;
+	U8 *buf = arena_push(arena, buf_size);
+
+	S32 n = vsnprintf((char *)buf, buf_size, fmt, args);
+	va_end(args2);
+
+	if (n > 0)
+		r = str8(buf, n);
+
+	return r;
+}
+
+Str8 str8_pushf(Arena *arena, char *fmt, ...)
+{
+	va_list args;
+	va_start(args, fmt);
+	Str8 r = str8_pushfv(arena, fmt, args);
+	va_end(args);
+	return r;
+}
+
+void str8print(Str8 s)
+{
+	for (U64 i = 0; i < s.length; ++i)
+		printf("%c", (char)(*(s.ptr+i)));
+}
+
+Str8List *str8_list(Arena *arena)
+{
+	Str8List *list = arena_push(arena, sizeof(Str8List));
+	MemoryZero(list, sizeof(Str8List));
+	return list;
+}
+
+void str8_list_push(Arena *arena, Str8List *list, Str8 str, B32 to_front)
+{
+	Assert(arena && list);
+	Str8Node *n = arena_push(arena, sizeof(Str8Node));
+	n->str = str;
+	if (to_front)
+		DLLPushFront(list->first, list->last, n);
+	else
+		DLLPushBack(list->first, list->last, n);
+	list->total_length += str.length;
+	list->node_count++;
+}
+
+void str8_list_pushf(Arena *arena, Str8List *list, B32 to_front, char *fmt, ...)
+{
+	va_list args;
+	va_start(args, fmt);
+	Str8 str = str8_pushfv(arena, fmt, args);
+	va_end(args);
+	str8_list_push(arena, list, str, to_front);
+}
+
+void str8_list_print(Str8List *list)
+{
+	for (Str8Node *n = list->first; n; n = n->next) {
+		str8print(n->str);
+		printf("%s", (n->next) ? " -> " : "\n");
+	}
+}