format: supports %zd (ssize_t) and %zu (ssize_t)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27953 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 36 insertions, 0 deletions

diff --git a/firmware/common/format.c b/firmware/common/format.c
index 2655a871c9..0fa838f511 100644
--- a/firmware/common/format.c
+++ b/firmware/common/format.c
@@ -42,6 +42,8 @@ int format(
     long lval, lsign;
     unsigned int uval;
     unsigned long ulval;
+    size_t uszval;
+    ssize_t szval, szsign;
     bool ok = true;
 
     tmpbuf[sizeof tmpbuf - 1] = '\0';
@@ -167,6 +169,40 @@ int format(
 
             break;
 
+        case 'z':
+            ch = *fmt++;
+            switch(ch) {
+                case 'd':
+                    szval = szsign = va_arg (ap, long);
+                    if (szval < 0)
+                        szval = -szval;
+                    do
+                    {
+                        *--str = (szval % 10) + '0';
+                        szval /= 10;
+                    }
+                    while (szval > 0);
+                    if (szsign < 0)
+                        *--str = '-';
+                    break;
+
+                case 'u':
+                    uszval = va_arg(ap, size_t);
+                    do
+                    {
+                        *--str = (uszval % 10) + '0';
+                        uszval /= 10;
+                    }
+                    while (uszval > 0);
+                    break;
+
+                default:
+                    *--str = 'z';
+                    *--str = ch;
+            }
+
+            break;
+
         default:
             *--str = ch;
             break;