docs: add memory chapter

1 files changed, 0 insertions, 54 deletions

diff --git a/docs/ref/api/util/nng_strdup.md b/docs/ref/api/util/nng_strdup.md
deleted file mode 100644
index 32d3fba2..00000000
--- a/docs/ref/api/util/nng_strdup.md
+++ /dev/null
@@ -1,54 +0,0 @@
-# nng_strdup
-
-## NAME
-
-nng_strdup --- duplicate string
-
-## SYNOPSIS
-
-```c
-#include <nng/nng.h>
-
-char *nng_strdup(const char *src);
-void nng_strfree(char *str);
-```
-
-## DESCRIPTION
-
-The {{i:`nng_strdup`}} duplicates the string _src_ and returns it.
-
-This is logically equivalent to using [`nng_alloc`][nng_alloc]
-to allocate a region of memory of `strlen(s) + 1` bytes, and then
-using `strcpy` to copy the string into the destination before
-returning it.
-
-The returned string should be deallocated with
-{{i:`nng_strfree`}}, or may be deallocated using the
-[`nng_free`][nng_free] using the length of the returned string plus
-one (for the `NUL` terminating byte).
-
-> [!IMPORTANT]
-> Do not use the system `free` or similar functions to deallocate
-> the string, since those may use a different memory arena!
-
-> [!IMPORTANT]
-> If a string created with
-> `nng_strdup` is modified to be shorter, then it is incorrect to free it with `nng_strfree`.
-> (The [`nng_free`][nng_free] function can be used instead in that
-> case, using the length of the original string plus one to account for the `NUL` byte, for the size.)
-
-## RETURN VALUES
-
-The `nng_strdup` function returns the new string on success, and `NULL` on failure.
-
-## ERRORS
-
-No errors are returned from `nng_strdup`, but a `NULL` return value should be
-treated the same as `NNG_ENOMEM`.
-
-## SEE ALSO
-
-[nng_alloc][nng_alloc]
-
-[nng_alloc]: ../util/nng_alloc.md
-[nng_free]: ../util/nng_alloc.md