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| author | Ulrich Drepper <drepper@redhat.com> | 1999-06-15 12:07:01 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 1999-06-15 12:07:01 +0000 |
| commit | 61464e3e737575c2f0df89866a32ff546b066fa1 (patch) | |
| tree | 4a5f92f880328fd6f01d76d5024f1ba0aabfd467 /sysdeps/generic/strtol.c | |
| parent | 540009244c7c9f1aec64af6fb1efba7245ed8bb3 (diff) | |
| download | glibc-61464e3e737575c2f0df89866a32ff546b066fa1.tar glibc-61464e3e737575c2f0df89866a32ff546b066fa1.tar.gz glibc-61464e3e737575c2f0df89866a32ff546b066fa1.tar.bz2 glibc-61464e3e737575c2f0df89866a32ff546b066fa1.zip | |
Update.
1999-06-14 Geoff Keating <geoffk@ozemail.com.au>
* stdlib/tst-strtoll.c: New file.
* stdlib/Makefile (tests): Add tst-strtoll.c
* stdlib/strtol.c: It is not generally true that if
(unsigned)a*(unsigned)b overflows, then the result is
less than 'a'.
Diffstat (limited to 'sysdeps/generic/strtol.c')
| -rw-r--r-- | sysdeps/generic/strtol.c | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/sysdeps/generic/strtol.c b/sysdeps/generic/strtol.c index 6ba2960f29..42da792c44 100644 --- a/sysdeps/generic/strtol.c +++ b/sysdeps/generic/strtol.c @@ -348,6 +348,7 @@ INTERNAL (strtol) (nptr, endptr, base, group LOCALE_PARAM) if (sizeof (long int) != sizeof (LONG int)) { unsigned long int j = 0; + unsigned long int jmax = ULONG_MAX / base; for (;c != L_('\0'); c = *++s) { @@ -362,18 +363,14 @@ INTERNAL (strtol) (nptr, endptr, base, group LOCALE_PARAM) if ((int) c >= base) break; /* Note that we never can have an overflow. */ - else + else if (j >= jmax) { - unsigned long int jj = j * (unsigned long int) base; - if (jj < j) - { - /* We have an overflow. Now use the long representation. */ - i = (unsigned LONG int) j; - goto use_long; - } - j = jj; - j += c; + /* We have an overflow. Now use the long representation. */ + i = (unsigned LONG int) j; + goto use_long; } + else + j = j * (unsigned long int) base + c; } i = (unsigned LONG int) j; |