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author | Jonathan Maw <jonathan.maw@codethink.co.uk> | 2013-09-30 15:08:10 +0100 |
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committer | Jonathan Maw <jonathan.maw@codethink.co.uk> | 2013-09-30 15:08:10 +0100 |
commit | 43efcf42382e87de4aa423e5e1607958ad1717d0 (patch) | |
tree | 7e19a0765b0dd6885fbdf69d3a8d0159a1b42de8 /Documentation/technical/api-allocation-growing.txt | |
parent | 45d74c4b0fe38218b4569a90da7102cf48d616c2 (diff) | |
parent | c7fd06b6411fb04eb4d9acd7f8822a288a50dc17 (diff) | |
download | git-43efcf42382e87de4aa423e5e1607958ad1717d0.tar.gz |
Merge branch 'baserock/jonathanmaw/S9007/upgrade-git' into baserock/morphbaserock/morph
Reviewed-by: Lars Wirzenius <lars.wirzenius@codethink.co.uk>
Reviewed-by: Daniel Silverstone <daniel.silverstone@codethink.co.uk>
Diffstat (limited to 'Documentation/technical/api-allocation-growing.txt')
-rw-r--r-- | Documentation/technical/api-allocation-growing.txt | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/Documentation/technical/api-allocation-growing.txt b/Documentation/technical/api-allocation-growing.txt index 43dbe09f73..542946b1ba 100644 --- a/Documentation/technical/api-allocation-growing.txt +++ b/Documentation/technical/api-allocation-growing.txt @@ -5,7 +5,9 @@ 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`; +* a pointer (`item`) that points at the array, initialized to `NULL` + (although please name the variable based on its contents, not on its + type); * an integer variable (`alloc`) that keeps track of how big the current allocation is, initialized to `0`; @@ -13,22 +15,22 @@ Define your array with: * 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, +Then before adding `n`th element to the item, call `ALLOC_GROW(item, n, alloc)`. This ensures that the array can hold at least `n` elements by calling `realloc(3)` and adjusting `alloc` variable. ------------ -sometype *ary; +sometype *item; size_t nr; size_t alloc for (i = 0; i < nr; i++) - if (we like ary[i] already) + if (we like item[i] already) return; /* we did not like any existing one, so add one */ -ALLOC_GROW(ary, nr + 1, alloc); -ary[nr++] = value you like; +ALLOC_GROW(item, nr + 1, alloc); +item[nr++] = value you like; ------------ You are responsible for updating the `nr` variable. |