diff options
| -rw-r--r-- | doc/usage/cmdline.rst | 6 | ||||
| -rw-r--r-- | include/vsprintf.h | 16 | ||||
| -rw-r--r-- | lib/strto.c | 28 | ||||
| -rw-r--r-- | test/str_ut.c | 4 |
4 files changed, 37 insertions, 17 deletions
diff --git a/doc/usage/cmdline.rst b/doc/usage/cmdline.rst index 2d5127c955..88f18c974c 100644 --- a/doc/usage/cmdline.rst +++ b/doc/usage/cmdline.rst @@ -85,3 +85,9 @@ useful:: => pmic write 2 0177 => pmic read 2 0x02: 0x00007f + +It is possible to use a `0x` prefix to use a hex value if that is more +convenient:: + + => i2c speed 0x30000 + Setting bus speed to 196608 Hz diff --git a/include/vsprintf.h b/include/vsprintf.h index debf977401..83d187e53d 100644 --- a/include/vsprintf.h +++ b/include/vsprintf.h @@ -22,8 +22,12 @@ * the end these are ignored. In the worst case, if all characters are invalid, * 0 is returned * - * If @base is 0, octal or hex prefixes are supported (e.g. 0777, 0x123) to - * select a particular base. By default decimal is used. + * A hex prefix is supported (e.g. 0x123) regardless of the value of @base. + * If found, the base is set to hex (16). + * + * If @base is 0: + * - an octal '0' prefix (e.g. 0777) sets the base to octal (8). + * - otherwise the base defaults to decimal (10). */ ulong simple_strtoul(const char *cp, char **endp, unsigned int base); @@ -71,8 +75,12 @@ unsigned long dectoul(const char *cp, char **endp); * * echo will append a newline to the tail. * - * If @base is 0, octal or hex prefixes are supported (e.g. 0777, 0x123) to - * select a particular base. By default decimal is used. + * A hex prefix is supported (e.g. 0x123) regardless of the value of @base. + * If found, the base is set to hex (16). + * + * If @base is 0: + * - an octal '0' prefix (e.g. 0777) sets the base to octal (8). + * - otherwise the base defaults to decimal (10). * * Copied this function from Linux 2.6.38 commit ID: * 521cb40b0c44418a4fd36dc633f575813d59a43d diff --git a/lib/strto.c b/lib/strto.c index b056b205c8..7bba1e3e54 100644 --- a/lib/strto.c +++ b/lib/strto.c @@ -14,19 +14,25 @@ #include <linux/ctype.h> /* from lib/kstrtox.c */ -static const char *_parse_integer_fixup_radix(const char *s, unsigned int *base) +static const char *_parse_integer_fixup_radix(const char *s, uint *basep) { - if (*base == 0) { - if (s[0] == '0') { - if (tolower(s[1]) == 'x') - *base = 16; - else - *base = 8; - } else - *base = 10; + /* Look for a 0x prefix */ + if (s[0] == '0') { + int ch = tolower(s[1]); + + if (ch == 'x') { + *basep = 16; + s += 2; + } else if (!*basep) { + /* Only select octal if we don't have a base */ + *basep = 8; + } } - if (*base == 16 && s[0] == '0' && tolower(s[1]) == 'x') - s += 2; + + /* Use decimal by default */ + if (!*basep) + *basep = 10; + return s; } diff --git a/test/str_ut.c b/test/str_ut.c index 0d1bf39809..d2840d5152 100644 --- a/test/str_ut.c +++ b/test/str_ut.c @@ -89,7 +89,7 @@ static int str_simple_strtoul(struct unit_test_state *uts) ut_assertok(run_strtoul(uts, str2, 10, 1099, 4, upper)); ut_assertok(run_strtoul(uts, str2, 16, 0x1099ab, 6, upper)); ut_assertok(run_strtoul(uts, str3, 16, 0xb, 3, upper)); - ut_assertok(run_strtoul(uts, str3, 10, 0, 1, upper)); + ut_assertok(run_strtoul(uts, str3, 10, 0xb, 3, upper)); /* Octal */ ut_assertok(run_strtoul(uts, str6, 0, 63, 3, upper)); @@ -144,7 +144,7 @@ static int str_simple_strtoull(struct unit_test_state *uts) ut_assertok(run_strtoull(uts, str2, 10, 1099, 4, upper)); ut_assertok(run_strtoull(uts, str2, 16, 0x1099ab, 6, upper)); ut_assertok(run_strtoull(uts, str3, 16, 0xb, 3, upper)); - ut_assertok(run_strtoull(uts, str3, 10, 0, 1, upper)); + ut_assertok(run_strtoull(uts, str3, 10, 0xb, 3, upper)); /* Octal */ ut_assertok(run_strtoull(uts, str6, 0, 63, 3, upper)); |