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| author | Simon Glass <sjg@chromium.org> | 2022-04-24 23:30:57 -0600 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2022-04-25 10:00:03 -0400 |
| commit | d667a0d8f413d7278f912aa4e671bc56d28b25f2 (patch) | |
| tree | 333f3a7ff758dc6b9a32207fc8061c8f15bcca8a /lib | |
| parent | 4e64cae0a060c579078de299c6a118aa6f6d7b5b (diff) | |
| download | u-boot-d667a0d8f413d7278f912aa4e671bc56d28b25f2.tar.gz u-boot-d667a0d8f413d7278f912aa4e671bc56d28b25f2.tar.bz2 u-boot-d667a0d8f413d7278f912aa4e671bc56d28b25f2.zip | |
lib: Fix a few bugs in trailing_strtoln()
At present this has a minor bug in that it reads the byte before the
start of the string, if it is empty. Also it doesn't handle a
non-numeric prefix which is only one character long.
Fix these bugs with a reworked implementation. Add a test for the second
case. The first one is hard to test.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/strto.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/lib/strto.c b/lib/strto.c index f191884376..b1d803a77d 100644 --- a/lib/strto.c +++ b/lib/strto.c @@ -189,11 +189,12 @@ long trailing_strtoln(const char *str, const char *end) if (!end) end = str + strlen(str); - if (isdigit(end[-1])) { - for (p = end - 1; p > str; p--) { - if (!isdigit(*p)) - return dectoul(p + 1, NULL); - } + p = end - 1; + if (p > str && isdigit(*p)) { + do { + if (!isdigit(p[-1])) + return dectoul(p, NULL); + } while (--p > str); } return -1; |