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git-compat-util.h: implement checked size_t to uint32_t conversion

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In a similar fashion as other checked cast functions in this header
(such as `cast_size_t_to_ulong()` and `cast_size_t_to_int()`), implement
a checked cast function for going from a size_t to a uint32_t value.

This function will be utilized in a future commit which needs to make
such a conversion.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Taylor Blau
2023-12-14 17:24:22 -05:00
committed by Junio C Hamano
parent b96289a10b
commit ed9f41480a
1 changed files with 9 additions and 0 deletions
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9
git-compat-util.h
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@ -1013,6 +1013,15 @@ static inline unsigned long cast_size_t_to_ulong(size_t a)
return (unsigned long)a; return (unsigned long)a;
} }
static inline uint32_t cast_size_t_to_uint32_t(size_t a)
{
if (a != (uint32_t)a)
die("object too large to read on this platform: %"
PRIuMAX" is cut off to %u",
(uintmax_t)a, (uint32_t)a);
return (uint32_t)a;
}
static inline int cast_size_t_to_int(size_t a) static inline int cast_size_t_to_int(size_t a)
{ {
if (a > INT_MAX) if (a > INT_MAX)