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author | Clément Foucault <foucault.clem@gmail.com> | 2018-05-25 13:34:02 +0300 |
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committer | Clément Foucault <foucault.clem@gmail.com> | 2018-05-30 13:25:20 +0300 |
commit | 7b9a0ed8c47dfef03e8b21cafae3b5438bc93415 (patch) | |
tree | bad2c70c6b18602babbd0ebffc89b41edcdb7361 /source/blender/blenlib | |
parent | 08d325805f0c55e69ee0bfa6e17325afa753354a (diff) |
BLI: Utils: Add Macro that compute the number of digits in integers type.
Usefull if you want to create char chains to contains hashes of a certain
type.
Diffstat (limited to 'source/blender/blenlib')
-rw-r--r-- | source/blender/blenlib/BLI_utildefines.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_utildefines.h b/source/blender/blenlib/BLI_utildefines.h index 75ddb5e739c..9c90b86832a 100644 --- a/source/blender/blenlib/BLI_utildefines.h +++ b/source/blender/blenlib/BLI_utildefines.h @@ -629,6 +629,14 @@ extern bool BLI_memory_is_zero(const void *arr, const size_t arr_size); # define UNLIKELY(x) (x) #endif +/* Expands to an integer constant expression evaluating to a close upper bound + * on the number the number of decimal digits in a value expressible in the + * integer type given by the argument (if it is a type name) or the the integer + * type of the argument (if it is an expression). The meaning of the resulting + * expression is unspecified for other arguments. + * i.e: DECIMAL_DIGITS_BOUND(uchar) is equal to 3. */ +#define DECIMAL_DIGITS_BOUND(t) (241 * sizeof(t) / 100 + 1) + #ifdef __cplusplus } #endif |