random small size optimizations

1 files changed, 8 insertions, 8 deletions

diff --git a/miscutils/hdparm.c b/miscutils/hdparm.c
index 16485b900..e60e642d6 100644
--- a/miscutils/hdparm.c
+++ b/miscutils/hdparm.c
@@ -2025,28 +2025,28 @@ static void process_dev(char *devname)
 #ifdef CONFIG_FEATURE_HDPARM_GET_IDENTITY
 static int fromhex(unsigned char c)
 {
-        if (c >= 'a' && c <= 'f')
-                return 10 + (c - 'a');
-        if (c >= '0' && c <= '9')
+        if (isdigit(c))
                 return (c - '0');
+        if (c >= 'a' && c <= 'f')
+                return (c - ('a' - 10));
         bb_error_msg_and_die("bad char: '%c' 0x%02x", c, c);
 }
 
 static void identify_from_stdin(void)
 {
         uint16_t sbuf[256];
-        unsigned char  buf[1280], *b = (unsigned char *)buf;
-        int i, count = read(0, buf, 1280);
+        unsigned char buf[1280];
+        unsigned char *b = (unsigned char *)buf;
+        int i;
 
-        if (count != 1280)
-                bb_error_msg_and_die("read(%d bytes) failed (rc=%d)", 1280, count);
+        xread(0, buf, 1280);
 
         // Convert the newline-separated hex data into an identify block.
 
         for (i = 0; i<256; i++)  {
                 int j;
                 for (j = 0; j < 4; j++)
-                        sbuf[i] = (sbuf[i] <<4) + fromhex(*(b++));
+                        sbuf[i] = (sbuf[i] << 4) + fromhex(*(b++));
         }
 
         // Parse the data.