diff options
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | stdlib/Makefile | 2 | ||||
| -rw-r--r-- | stdlib/tst-limits.c | 69 |
3 files changed, 78 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog index 920c69254b..9ae5136d40 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,11 @@ +2000-09-15 Ulrich Drepper <drepper@redhat.com> + + * include/limits.h: Define LLONG_MIN, LLONG_MAX, ULLONG_MAX if + necessary. Move includes of POSIX and Unix limits files to the + end. + * stdlib/Makefile (tests): Add tst-limits. + * stdlib/tst-limits.h: New file. + 2000-09-15 Andreas Jaeger <aj@suse.de> * sysdeps/mips/fpu/fesetenv.c (__fesetenv): Handle FE_NOMASK_ENV. diff --git a/stdlib/Makefile b/stdlib/Makefile index 24b4b44fbf..19e88f3aca 100644 --- a/stdlib/Makefile +++ b/stdlib/Makefile @@ -52,7 +52,7 @@ routines := \ distribute := exit.h grouping.h abort-instr.h isomac.c tests := tst-strtol tst-strtod testmb testrand testsort testdiv \ test-canon test-canon2 tst-strtoll tst-environ \ - tst-xpg-basename tst-random tst-bsearch + tst-xpg-basename tst-random tst-bsearch tst-limits # Several mpn functions from GNU MP are used by the strtod function. diff --git a/stdlib/tst-limits.c b/stdlib/tst-limits.c new file mode 100644 index 0000000000..b6a7f16334 --- /dev/null +++ b/stdlib/tst-limits.c @@ -0,0 +1,69 @@ +/* It is important that this comes first to not hide effects introduced + by other headers. */ +#include <limits.h> + +#include <inttypes.h> +#include <stdio.h> + + +static long long int +bitval (int bits) +{ + long long int val = 0; + while (bits-- > 0) + val |= 1ll << bits; + return val; +} + + +int +main (void) +{ + int result = 0; + +#define TEST(name, format, expected) \ + printf ("%-12s expected = %-20" format " actual = %" format "\n", \ + #name ":", expected, name); \ + result |= name != expected + + /* The limits from ISO C99. */ + + /* We cannot support anything but 8-bit chars. */ + TEST (CHAR_BIT, "d", 8); + TEST (SCHAR_MIN, "d", -128); + TEST (SCHAR_MAX, "d", 127); + TEST (UCHAR_MAX, "d", 255); + + TEST (SHRT_MIN, "d", -(1 << (sizeof (short int) * CHAR_BIT - 1))); + TEST (SHRT_MAX, "d", (1 << (sizeof (short int) * CHAR_BIT - 1)) - 1); + TEST (USHRT_MAX, "d", (1 << sizeof (short int) * CHAR_BIT) - 1); + + TEST (INT_MIN, "d", (int) -bitval (sizeof (int) * CHAR_BIT - 1) - 1); + TEST (INT_MAX, "d", (int) bitval (sizeof (int) * CHAR_BIT - 1)); + TEST (UINT_MAX, "u", + (unsigned int) bitval (sizeof (unsigned int) * CHAR_BIT)); + + TEST (LONG_MIN, "ld", + (long int) -bitval (sizeof (long int) * CHAR_BIT - 1) - 1); + TEST (LONG_MAX, "ld", (long int) bitval (sizeof (long int) * CHAR_BIT - 1)); + TEST (ULONG_MAX, "lu", + (unsigned long int) bitval (sizeof (unsigned long int) * CHAR_BIT)); + + TEST (LLONG_MIN, "lld", -bitval (sizeof (long long int) * CHAR_BIT - 1) - 1); + TEST (LLONG_MAX, "lld", bitval (sizeof (long long int) * CHAR_BIT - 1)); + TEST (ULLONG_MAX, "llu", + (unsigned long long int) bitval (sizeof (unsigned long long int) + * CHAR_BIT)); + + /* Values from POSIX and Unix. */ +#ifdef PAGESIZE + TEST (PAGESIZE, "d", getpagesize ()); +#elif PAGE_SIZE + TEST (PAGE_SIZE, "d", getpagesize ()); +#endif + + TEST (WORD_BIT, "d", sizeof (int) * CHAR_BIT); + TEST (LONG_BIT, "d", sizeof (long int) * CHAR_BIT); + + return result; +} |