mirror of
https://github.com/git/git.git
synced 2024-11-05 16:52:59 +01:00
530e741c72
Most of them are still stubs, but the procedure to build the HTML documentation, maintaining the index and installing the end product are there. I placed names of people who are likely to know the most about the topic in the stub files, so that volunteers will know whom to ask questions as needed. Signed-off-by: Junio C Hamano <gitster@pobox.com>
34 lines
935 B
Text
34 lines
935 B
Text
allocation growing API
|
|
======================
|
|
|
|
Dynamically growing an array using realloc() is error prone and boring.
|
|
|
|
Define your array with:
|
|
|
|
* a pointer (`ary`) that points at the array, initialized to `NULL`;
|
|
|
|
* an integer variable (`alloc`) that keeps track of how big the current
|
|
allocation is, initialized to `0`;
|
|
|
|
* another integer variable (`nr`) to keep track of how many elements the
|
|
array currently has, initialized to `0`.
|
|
|
|
Then before adding `n`th element to the array, call `ALLOC_GROW(ary, n,
|
|
alloc)`. This ensures that the array can hold at least `n` elements by
|
|
calling `realloc(3)` and adjusting `alloc` variable.
|
|
|
|
------------
|
|
sometype *ary;
|
|
size_t nr;
|
|
size_t alloc
|
|
|
|
for (i = 0; i < nr; i++)
|
|
if (we like ary[i] already)
|
|
return;
|
|
|
|
/* we did not like any existing one, so add one */
|
|
ALLOC_GROW(ary, nr + 1, alloc);
|
|
ary[nr++] = value you like;
|
|
------------
|
|
|
|
You are responsible for updating the `nr` variable.
|