serial plugin: Fix -Wshorten-64-to-32 warning.

serial.c:87:28: error: implicit conversion loses integer precision: 'unsigned long' to 'int' [-Werror,-Wshorten-64-to-32]
                len = strlen (fields[0]) - 1;
                    ~ ~~~~~~~~~~~~~~~~~~~^~~
serial.c:96:10: error: implicit conversion loses integer precision: 'unsigned long' to 'int' [-Werror,-Wshorten-64-to-32]
                        len = strlen (fields[i]);
                            ~ ^~~~~~~~~~~~~~~~~~

diff --git a/src/serial.c b/src/serial.c
index 4300822..0878d3c 100644 (file)
--- a/src/serial.c
+++ b/src/serial.c
@@ -54,13 +54,6 @@ static int serial_read (void)
        FILE *fh;
        char buffer[1024];
 
-       derive_t rx = 0;
-       derive_t tx = 0;
-       
-       char *fields[16];
-       int i, numfields;
-       int len;
-
        /* there are a variety of names for the serial device */
        if ((fh = fopen ("/proc/tty/driver/serial", "r")) == NULL &&
                (fh = fopen ("/proc/tty/driver/ttyS", "r")) == NULL)
@@ -73,10 +66,16 @@ static int serial_read (void)
 
        while (fgets (buffer, sizeof (buffer), fh) != NULL)
        {
-               int have_rx = 0, have_tx = 0;
+               derive_t rx = 0;
+               derive_t tx = 0;
+               _Bool have_rx = 0, have_tx = 0;
+               size_t len;
 
-               numfields = strsplit (buffer, fields, 16);
+               char *fields[16];
+               int numfields;
+               int i;
 
+               numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
                if (numfields < 6)
                        continue;
 
@@ -84,12 +83,12 @@ static int serial_read (void)
                 * 0: uart:16550A port:000003F8 irq:4 tx:0 rx:0
                 * 1: uart:16550A port:000002F8 irq:3 tx:0 rx:0
                 */
-               len = strlen (fields[0]) - 1;
-               if (len < 1)
+               len = strlen (fields[0]);
+               if (len < 2)
                        continue;
-               if (fields[0][len] != ':')
+               if (fields[0][len - 1] != ':')
                        continue;
-               fields[0][len] = '\0';
+               fields[0][len - 1] = 0;
 
                for (i = 1; i < numfields; i++)
                {
@@ -99,20 +98,18 @@ static int serial_read (void)
 
                        if (strncmp (fields[i], "tx:", 3) == 0)
                        {
-                               tx = atoll (fields[i] + 3);
-                               have_tx++;
+                               if (strtoderive (fields[i] + 3, &tx) == 0)
+                                       have_tx = 1;
                        }
                        else if (strncmp (fields[i], "rx:", 3) == 0)
                        {
-                               rx = atoll (fields[i] + 3);
-                               have_rx++;
+                               if (strtoderive (fields[i] + 3, &rx) == 0)
+                                       have_rx = 1;
                        }
                }
 
-               if ((have_rx == 0) || (have_tx == 0))
-                       continue;
-
-               serial_submit (fields[0], rx, tx);
+               if (have_rx && have_tx)
+                       serial_submit (fields[0], rx, tx);
        }
 
        fclose (fh);