strbufs has some invariants that are very important to keep in mind:
-. The `buf` member is never NULL, so you it can be used in any usual C
+. The `buf` member is never NULL, so it can be used in any usual C
string operations safely. strbuf's _have_ to be initialized either by
`strbuf_init()` or by `= STRBUF_INIT` before the invariants, though.
+
* `struct strbuf`
-This is string buffer structure. The `len` member can be used to
+This is the string buffer structure. The `len` member can be used to
determine the current length of the string, and `buf` member provides access to
the string itself.
Read a given size of data from a FILE* pointer to the buffer.
+
-NOTE: The buffer is rewinded if the read fails. If -1 is returned,
+NOTE: The buffer is rewound if the read fails. If -1 is returned,
`errno` must be consulted, like you would do for `read(3)`.
`strbuf_read()`, `strbuf_read_file()` and `strbuf_getline()` has the
same behaviour as well.
comments are considered contents to be removed or not.
`launch_editor`::
+
+ Launch the user preferred editor to edit a file and fill the buffer
+ with the file's contents upon the user completing their editing. The
+ third argument can be used to set the environment which the editor is
+ run in. If the buffer is NULL the editor is launched as usual but the
+ file's contents are not read into the buffer upon completion.