Merge branch 'master' of github.com:omnisci3nce/celeritas-core

1 files changed, 47 insertions, 5 deletions

diff --git a/src/std/str.h b/src/std/str.h
index f3ade5a..735b88e 100644
--- a/src/std/str.h
+++ b/src/std/str.h
@@ -1,10 +1,17 @@
 /**
+ * @file str.h
+ * @author your name (you@domain.com)
  * @brief
+ * @version 0.1
+ * @date 2024-02-25
+ *
+ * @copyright Copyright (c) 2024
  *
  */
 #pragma once
 
 #include "defines.h"
+#include "mem.h"
 
 /**
  * @brief Fat pointer representing a UTF8 (TODO some APIs supporting utf8) encoded string
@@ -12,20 +19,55 @@
          print routines are written. alternatively wrap in `cstr()` and pass to `%s`.
  */
 typedef struct {
-  u8 *buf;
+  u8* buf;
   size_t len;
 } str8;
 
+// --- Constructors
+
+/** @brief Take a string literal and turn it into a `str8` */
+#define str8lit(s) \
+  (str8) { (u8*)s, ((sizeof(s) / sizeof(*(s)) - 1)) }
+
+str8 str8_create(u8* buf, size_t len);
+
+/** @brief Return a null-terminated C string cloned onto an arena */
+char* str8_to_cstr(arena* a, str8 s);
+
+#define cstr(a, s) (str8_to_cstr(a, s))  // Shorthand
+
+// --- Comparisons
+
 /** @brief Compare two strings for exact equality */
 bool str8_equals(str8 a, str8 b);
 
 /**
  * @brief Compare the first `first_nchars` of each string for equality
-          If either of the strings are shorter than the number only the characters up until the end
- of the shorter string will be compared.
+ * @details If either of the strings are shorter than the number only the characters up until the
+ end of the shorter string will be compared.
  * @returns 0 if they are fully equal up until `first_nchars`, i.e they never differed, else it
- returns the index at which the first string differed from the second string.
+            returns the index at which the first string differed from the second string.
 */
 size_t str8_nequals(str8 a, str8 b, size_t first_nchars);
 
-bool str8_ends_with(str8 input_str, str8 suffix);
\ No newline at end of file
+bool str8_ends_with(str8 input_str, str8 suffix);
+
+/// --- Subviews
+
+str8 str8_substr(str8 s, u64 min, u64 max);
+/** @brief Keeps only the `first_n` chars of `s` */
+str8 str8_take(str8 s, u64 first_n);
+/** @brief Keeps only the `last_n` chars of `s` */
+str8 str8_drop(str8 s, u64 last_n);
+/** @brief Keeps everything after the first `n` chars of `s` */
+str8 str8_skip(str8 s, u64 n);
+/** @brief Keeps everything before the last `n` chars of `s` */
+str8 str8_chop(str8 s, u64 n);
+
+str8 str8_concat(arena* a, str8 left, str8 right);
+
+/// --- Misc
+
+static inline bool str8_is_null_term(str8 a) {
+  return a.buf[a.len] == 0;  // This doesn't seem safe. YOLO
+}
\ No newline at end of file