input/raw_analog: Fix gcc 7 compiler warnings.

  ../src/input/raw_analog.c: In function ‘init’:
  ../src/input/raw_analog.c:133:31: warning: ‘%d’ directive output may be truncated writing between 1 and 10 bytes into a region of size 6 [-Wformat-truncation=]
     snprintf(channelname, 8, "CH%d", i + 1);
                                 ^~
  ../src/input/raw_analog.c:133:28: note: directive argument in the range [1, 2147483647]
     snprintf(channelname, 8, "CH%d", i + 1);
                              ^~~~~~
  ../src/input/raw_analog.c:133:3: note: ‘snprintf’ output between 4 and 13 bytes into a destination of size 8
     snprintf(channelname, 8, "CH%d", i + 1);
     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

diff --git a/src/input/raw_analog.c b/src/input/raw_analog.c
index 95b1d669ee0d5b51a2278ec4e8b14c625bc6fdaf..f6a02635ddde8f6ebc178e2a1abc47c9c24d5ad2 100644 (file)
--- a/src/input/raw_analog.c
+++ b/src/input/raw_analog.c
@@ -105,7 +105,7 @@ static int init(struct sr_input *in, GHashTable *options)
 {
        struct context *inc;
        int num_channels;
-       char channelname[8];
+       char channelname[16];
        const char *format;
        int fmt_index;
 
@@ -130,7 +130,7 @@ static int init(struct sr_input *in, GHashTable *options)
        in->priv = inc = g_malloc0(sizeof(struct context));
 
        for (int i = 0; i < num_channels; i++) {
-               snprintf(channelname, 8, "CH%d", i + 1);
+               snprintf(channelname, sizeof(channelname) - 1, "CH%d", i + 1);
                sr_channel_new(in->sdi, i, SR_CHANNEL_ANALOG, TRUE, channelname);
        }