Messages in this thread Patch in this message | | | Date | Sat, 2 May 2015 03:50:08 +0300 | From | Alexey Dobriyan <> | Subject | [PATCH 03/10] parse_integer: convert sscanf() |
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Remove base second guessing.
Uniformly fix too liberal acceptance in %lu/%ld cases in the next patch.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> ---
lib/vsprintf.c | 36 ++++++++++-------------------------- 1 file changed, 10 insertions(+), 26 deletions(-)
--- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -2470,8 +2470,6 @@ EXPORT_SYMBOL_GPL(bprintf); int vsscanf(const char *buf, const char *fmt, va_list args) { const char *str = buf; - char *next; - char digit; int num = 0; u8 qualifier; unsigned int base; @@ -2483,6 +2481,8 @@ int vsscanf(const char *buf, const char *fmt, va_list args) bool is_sign; while (*fmt) { + int len; + /* skip any white space in format */ /* white space in format matchs any amount of * white space, including none, in the input. @@ -2611,35 +2611,22 @@ int vsscanf(const char *buf, const char *fmt, va_list args) */ str = skip_spaces(str); - digit = *str; - if (is_sign && digit == '-') - digit = *(str + 1); - - if (!digit - || (base == 16 && !isxdigit(digit)) - || (base == 10 && !isdigit(digit)) - || (base == 8 && (!isdigit(digit) || digit > '7')) - || (base == 0 && !isdigit(digit))) - break; - if (is_sign) - val.s = qualifier != 'L' ? - simple_strtol(str, &next, base) : - simple_strtoll(str, &next, base); + len = parse_integer(str, base, &val.s); else - val.u = qualifier != 'L' ? - simple_strtoul(str, &next, base) : - simple_strtoull(str, &next, base); + len = parse_integer(str, base, &val.u); + if (len < 0) + break; - if (field_width > 0 && next - str > field_width) { + if (field_width > 0) { if (base == 0) _parse_integer_fixup_radix(str, &base); - while (next - str > field_width) { + while (len > field_width) { if (is_sign) val.s = div_s64(val.s, base); else val.u = div_u64(val.u, base); - --next; + len--; } } @@ -2680,10 +2667,7 @@ int vsscanf(const char *buf, const char *fmt, va_list args) break; } num++; - - if (!next) - break; - str = next; + str += len; } return num;
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