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| author | Simon Glass <sjg@chromium.org> | 2023-01-17 10:47:30 -0700 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2023-01-23 18:11:39 -0500 |
| commit | 7f331941321d47ea4aa732b1174a57c273728cf5 (patch) | |
| tree | 1ef0af8a93e0d8e359ba9e2920b878615ac7bac4 /lib/vsprintf.c | |
| parent | 057c567fb5075b39f5ac040c7259675f472c3304 (diff) | |
| download | u-boot-7f331941321d47ea4aa732b1174a57c273728cf5.zip u-boot-7f331941321d47ea4aa732b1174a57c273728cf5.tar.gz u-boot-7f331941321d47ea4aa732b1174a57c273728cf5.tar.bz2 | |
lib: Support printing an error string
It is often useful to show an error code to give the user a clue as to
what went wrong. When error strings are compiled into U-Boot it is
possible to show a message as well.
But at present it is not very convenient, since code must check if the
error strings are present, then obtain the error string and use it in
a printf() string.
Add a %dE option which shows an error code along with an error string,
if available. This makes it easy to show one or both.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'lib/vsprintf.c')
| -rw-r--r-- | lib/vsprintf.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 530d808..8de3882 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -145,6 +145,7 @@ static noinline char *put_dec(char *buf, uint64_t num) #define LEFT 16 /* left justified */ #define SMALL 32 /* Must be 32 == 0x20 */ #define SPECIAL 64 /* 0x */ +#define ERRSTR 128 /* %dE showing error string if enabled */ /* * Macro to add a new character to our output string, but only if it will @@ -678,6 +679,8 @@ repeat: break; case 'd': + if (fmt[1] == 'E') + flags |= ERRSTR; case 'i': flags |= SIGN; case 'u': @@ -712,6 +715,15 @@ repeat: } str = number(str, end, num, base, field_width, precision, flags); + if (IS_ENABLED(CONFIG_ERRNO_STR) && (flags & ERRSTR)) { + const char *p; + + ADDCH(str, ':'); + ADDCH(str, ' '); + for (p = errno_str(num); *p; p++) + ADDCH(str, *p); + fmt++; + } } if (size > 0) { |