1 files changed, 132 insertions, 0 deletions
diff --git a/prbs.c b/prbs.c
new file mode 100644
index 0000000..818a110
--- /dev/null
+++ b/prbs.c
@@ -0,0 +1,132 @@
+#include "prbs.h"
+#include "macros.h"
+#include <string.h>
+#include <stdio.h>
+
+i32 cstrings_equal(const char *s1, const char *s2)
+{
+	assert(s1 && s2);
+	while (*s1++ == *s2++)
+		if (!*s1)
+			return 1;
+	return 0;
+}
+
+char *string_to_cstring(struct arena *arena, struct string str)
+{
+	u64 len = str.len + 1;
+	char *cstr = push_arena(arena, len);
+	memmove(cstr, str.ptr, len);
+	cstr[str.len] = 0;
+	return cstr;
+}
+
+i32 strings_equal(struct string str1, struct string str2)
+{
+	if (str1.len != str2.len)
+		return 0;
+	for (u64 i = 0; i < str1.len; ++i)
+		if (str1.ptr[i] != str2.ptr[i])
+			return 0;
+	return 1;
+}
+
+u8 *find_char(struct string str, i32 c)
+{
+	for (u64 i = 0; i < str.len; ++i)
+		if (str.ptr[i] == c)
+			return str.ptr + i;
+	return 0;
+}
+
+u8 *find_last_char(struct string str, i32 c)
+{
+	for (u64 i = str.len - 1; i > 0; --i)
+		if (str.ptr[i] == c)
+			return str.ptr + i;
+	return 0;
+}
+
+struct string string_from_range(u8 *start, u8 *end)
+{
+	assert(start);
+	assert(end);
+	assert(start < end);
+	return (struct string){start, end - start};
+}
+
+struct string get_dirname(struct string str)
+{
+	assert(str.len);
+	u8 *slash = find_last_char(str, '/');
+	if (!slash)
+		return str;
+	return string_from_range(str.ptr, slash);
+}
+
+struct string push_fstringv(struct arena *arena, const char *format, va_list args)
+{
+	char tmp[kilobytes(4) + 1];
+	i32 len = vsnprintf(tmp, kilobytes(4), format, args);
+	struct string str = {0};
+	if (len < 0)
+		return str;
+	u8 *ptr = push_arena(arena, len);
+	memmove(ptr, tmp, len);
+	return (struct string){ptr, len};
+}
+
+struct string push_fstring(struct arena *arena, const char *format, ...)
+{
+	va_list args;
+	va_start(args, format);
+	struct string str = push_fstringv(arena, format, args);
+	va_end(args);
+	return str;
+}
+
+void print_string(struct string str)
+{
+	assert(str.ptr && str.len);
+	printf("%.*s", str.len, str.ptr);
+}
+
+void push_string_to_list(struct arena *arena, struct string_list *list, i32 front, struct string str)
+{
+	struct string_node *node = push_arena(arena, sizeof(struct string_node));
+	node->str = str;
+	if (front)
+		dllpushfront(list->first, list->last, node);
+	else
+		dllpushback(list->first, list->last, node);
+	list->len += str.len;
+	list->cnt++;
+}
+
+void push_fstring_to_list(struct arena *arena, struct string_list *list, i32 front, const char *format, ...)
+{
+	va_list args;
+	va_start(args, format);
+	struct string str = push_fstringv(arena, format, args);
+	va_end(args);
+	push_string_to_list(arena, list, front, str);
+}
+
+struct string join_string_list(struct arena *arena, struct string_list *list)
+{
+	assert(arena);
+	assert(list);
+	struct string str = {arena->memory + arena->used, 0};
+	for (struct string_node *node = list->first; node; node = node->next) {
+		u8 *ptr = push_arena(arena, node->str.len);
+		memmove(ptr, node->str.ptr, node->str.len);
+		str.len += node->str.len;
+	}
+	return str;
+}
+
+void print_string_list(struct string_list *list)
+{
+	for (struct string_node *node = list->first; node; node = node->next)
+		print_string(node->str);
+}