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string: Add strncpy

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Signed-off-by: Simon Rozman <simon@rozman.si>
This commit is contained in:
Simon Rozman 2023-07-03 13:56:48 +02:00
parent 556d5a9798
commit 1c54745b3b
1 changed files with 44 additions and 0 deletions
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44
include/stdex/string.hpp
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@ -336,6 +336,50 @@ namespace stdex
}
}
///
/// Copy zero-terminated string
///
/// \param[in] dst Destination string
/// \param[in] src Source string
/// \param[in] count String code unit count limit
///
template <class T1, class T2>
inline void strncpy(
_Out_writes_(count) _Post_maybez_ T1* dst,
_In_reads_or_z_opt_(count) const T2* src, _In_ size_t count)
{
assert(dst && src || !count);
for (size_t i = 0; i < count && (dst[i] = src[i]) != 0; ++i);
}
///
/// Copy zero-terminated string
///
/// \param[in] dst Destination string
/// \param[in] count_dst Destination string code unit count limit
/// \param[in] src Source string
/// \param[in] count_src Source string code unit count limit
///
template <class T1, class T2>
inline void strncpy(
_Out_writes_(count_dst) _Post_maybez_ T1* dst, _In_ size_t count_dst,
_In_reads_or_z_opt_(count_src) const T2* src, _In_ size_t count_src)
{
assert(dst || !count_dst);
assert(src || !count_src);
for (size_t i = 0; ; ++i)
{
if (i > count_dst)
break;
if (i > count_src) {
dst[i] = 0;
break;
}
if ((dst[i] = src[i]) == 0)
break;
}
}
///
/// Convert CRLF to LF
/// Source and destination strings may point to the same buffer for inline conversion.