[PATCH v3 1/5] Add %X option to printf functions

[Javier Martinez Canillas]

From: Paulo Flabiano Smorigo <address@hidden>

The printf(3) function has support for the %X format specifier, to output
an unsigned hexadecimal integer in uppercase.

This can be achived in GRUB using the %x format specifier in grub_printf()
and calling grub_toupper(), but it is more convenient if there is support
for %X in grub_printf().

Signed-off-by: Paulo Flabiano Smorigo <address@hidden>
Signed-off-by: Javier Martinez Canillas <address@hidden>
Reviewed-by: Daniel Kiper <address@hidden>

---

Changes in v3: None
Changes in v2:
- Put patch that adds the %X format specifier first in the series.

 grub-core/kern/misc.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/grub-core/kern/misc.c b/grub-core/kern/misc.c
index 3b633d51f4c..76e7fb22872 100644
--- a/grub-core/kern/misc.c
+++ b/grub-core/kern/misc.c
@@ -588,7 +588,7 @@ grub_divmod64 (grub_uint64_t n, grub_uint64_t d, 
grub_uint64_t *r)
 static inline char *
 grub_lltoa (char *str, int c, unsigned long long n)
 {
-  unsigned base = (c == 'x') ? 16 : 10;
+  unsigned base = ((c == 'x') || (c == 'X')) ? 16 : 10;
   char *p;
 
   if ((long long) n < 0 && c == 'd')
@@ -603,7 +603,7 @@ grub_lltoa (char *str, int c, unsigned long long n)
     do
       {
        unsigned d = (unsigned) (n & 0xf);
-       *p++ = (d > 9) ? d + 'a' - 10 : d + '0';
+       *p++ = (d > 9) ? d + ((c == 'x') ? 'a' : 'A') - 10 : d + '0';
       }
     while (n >>= 4);
   else
@@ -676,6 +676,7 @@ parse_printf_args (const char *fmt0, struct printf_args 
*args,
        {
        case 'p':
        case 'x':
+       case 'X':
        case 'u':
        case 'd':
        case 'c':
@@ -762,6 +763,7 @@ parse_printf_args (const char *fmt0, struct printf_args 
*args,
       switch (c)
        {
        case 'x':
+       case 'X':
        case 'u':
          args->ptr[curn].type = UNSIGNED_INT + longfmt;
          break;
@@ -900,6 +902,7 @@ grub_vsnprintf_real (char *str, grub_size_t max_len, const 
char *fmt0,
          c = 'x';
          /* Fall through. */
        case 'x':
+       case 'X':
        case 'u':
        case 'd':
          {
-- 
2.21.0