From 174a2027ff0db579e18d5efacb17c3addf6473f6 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Thu, 29 Jun 2023 13:53:03 -0400
Subject: dstring: Add some exact-size utility functions

---
 src/dstring.h | 99 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 94 insertions(+), 5 deletions(-)

(limited to 'src/dstring.h')

diff --git a/src/dstring.h b/src/dstring.h
index ee3b345..2673f1b 100644
--- a/src/dstring.h
+++ b/src/dstring.h
@@ -38,12 +38,31 @@ char *dstrdup(const char *str);
  */
 char *dstrndup(const char *str, size_t n);
 
+/**
+ * Create a dynamic copy of a dynamic string.
+ *
+ * @param dstr
+ *         The dynamic string to copy.
+ */
+char *dstrddup(const char *dstr);
+
+/**
+ * Create an exact-sized dynamic copy of a string.
+ *
+ * @param str
+ *         The string to copy.
+ * @param len
+ *         The length of the string, which may include internal NUL bytes.
+ */
+char *dstrxdup(const char *str, size_t len);
+
 /**
  * Get a dynamic string's length.
  *
  * @param dstr
  *         The string to measure.
- * @return The length of dstr.
+ * @return
+ *         The length of dstr.
  */
 size_t dstrlen(const char *dstr);
 
@@ -54,7 +73,8 @@ size_t dstrlen(const char *dstr);
  *         The dynamic string to preallocate.
  * @param capacity
  *         The new capacity for the string.
- * @return 0 on success, -1 on failure.
+ * @return
+ *         0 on success, -1 on failure.
  */
 int dstreserve(char **dstr, size_t capacity);
 
@@ -65,7 +85,8 @@ int dstreserve(char **dstr, size_t capacity);
  *         The dynamic string to resize.
  * @param length
  *         The new length for the dynamic string.
- * @return 0 on success, -1 on failure.
+ * @return
+ *         0 on success, -1 on failure.
  */
 int dstresize(char **dstr, size_t length);
 
@@ -89,7 +110,8 @@ int dstrcat(char **dest, const char *src);
  *         The string to append.
  * @param n
  *         The maximum number of characters to take from src.
- * @return 0 on success, -1 on failure.
+ * @return
+ *         0 on success, -1 on failure.
  */
 int dstrncat(char **dest, const char *src, size_t n);
 
@@ -105,6 +127,20 @@ int dstrncat(char **dest, const char *src, size_t n);
  */
 int dstrdcat(char **dest, const char *src);
 
+/**
+ * Append to a dynamic string.
+ *
+ * @param dest
+ *         The destination dynamic string.
+ * @param src
+ *         The string to append.
+ * @param len
+ *         The exact number of characters to take from src.
+ * @return
+ *         0 on success, -1 on failure.
+ */
+int dstrxcat(char **dest, const char *src, size_t len);
+
 /**
  * Append a single character to a dynamic string.
  *
@@ -112,10 +148,63 @@ int dstrdcat(char **dest, const char *src);
  *         The string to append to.
  * @param c
  *         The character to append.
- * @return 0 on success, -1 on failure.
+ * @return
+ *         0 on success, -1 on failure.
  */
 int dstrapp(char **str, char c);
 
+/**
+ * Copy a string into a dynamic string.
+ *
+ * @param dest
+ *         The destination dynamic string.
+ * @param src
+ *         The string to copy.
+ * @returns
+ *         0 on success, -1 on failure.
+ */
+int dstrcpy(char **dest, const char *str);
+
+/**
+ * Copy a dynamic string into another one.
+ *
+ * @param dest
+ *         The destination dynamic string.
+ * @param src
+ *         The dynamic string to copy.
+ * @returns
+ *         0 on success, -1 on failure.
+ */
+int dstrdcpy(char **dest, const char *str);
+
+/**
+ * Copy a string into a dynamic string.
+ *
+ * @param dest
+ *         The destination dynamic string.
+ * @param src
+ *         The dynamic string to copy.
+ * @param n
+ *         The maximum number of characters to take from src.
+ * @returns
+ *         0 on success, -1 on failure.
+ */
+int dstrncpy(char **dest, const char *str, size_t n);
+
+/**
+ * Copy a string into a dynamic string.
+ *
+ * @param dest
+ *         The destination dynamic string.
+ * @param src
+ *         The dynamic string to copy.
+ * @param len
+ *         The exact number of characters to take from src.
+ * @returns
+ *         0 on success, -1 on failure.
+ */
+int dstrxcpy(char **dest, const char *str, size_t len);
+
 /**
  * Create a dynamic string from a format string.
  *
-- 
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