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Define UTF8PROC_SSIZE_MAX for the maximum utf8proc_ssize_t value #349

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Define UTF8PROC_SSIZE_MAX for the maximum utf8proc_ssize_t value #349

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12 changes: 12 additions & 0 deletions test/misc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -44,11 +44,23 @@ static void issue317(void) /* #317 */
}
}

static void issue103(void) /* #103 */
{
/* UTF8PROC_SSIZE_MAX should be the largest value of utf8proc_ssize_t.
Since utf8proc_ssize_t is a two's-complement signed type the same
size as utf8proc_size_t, that value is all bits set shifted right by one. */
utf8proc_ssize_t computed = (utf8proc_ssize_t)((utf8proc_size_t)-1 >> 1);
check(UTF8PROC_SSIZE_MAX == computed,
"UTF8PROC_SSIZE_MAX (%lld) != computed max (%lld)",
(long long)UTF8PROC_SSIZE_MAX, (long long)computed);
}

int main(void)
{
issue128();
issue102();
issue317();
issue103();
#ifdef UNICODE_VERSION
printf("Unicode version: Makefile has %s, has API %s\n", UNICODE_VERSION, utf8proc_unicode_version());
check(!strcmp(UNICODE_VERSION, utf8proc_unicode_version()), "utf8proc_unicode_version mismatch");
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12 changes: 12 additions & 0 deletions utf8proc.h
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Original file line number Diff line number Diff line change
Expand Up @@ -120,6 +120,18 @@ typedef bool utf8proc_bool;
#endif
#include <limits.h>

/** The maximum value representable by the ::utf8proc_ssize_t type, useful
* for checked conversions from ::utf8proc_size_t (or size_t) lengths. */
#if defined(_MSC_VER) && _MSC_VER < 1800
# ifdef _WIN64
# define UTF8PROC_SSIZE_MAX _I64_MAX
# else
# define UTF8PROC_SSIZE_MAX INT_MAX
# endif
#else
# define UTF8PROC_SSIZE_MAX PTRDIFF_MAX
#endif

#ifdef UTF8PROC_STATIC
# ifndef UTF8PROC_DLLEXPORT
# define UTF8PROC_DLLEXPORT
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