Improve error messages for output I/O error

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@2049 9d0c8265-081b-0410-96cb-a4ca84ce46f8

1 files changed, 13 insertions, 3 deletions

diff --git a/converter/other/pnmtops.c b/converter/other/pnmtops.c
index 2d76e6e9..0a3379dc 100644
--- a/converter/other/pnmtops.c
+++ b/converter/other/pnmtops.c
@@ -398,6 +398,16 @@ writeFileChar(const char * const buffer,
 
 
 
+static void
+writeFileByte(unsigned char const byte,
+              const char *  const name,
+              FILE *        const ofP) {
+
+    writeFile(&byte, 1, name, ofP);
+}
+
+
+
 #define MAX_FILTER_CT 10
     /* The maximum number of filters this code is capable of applying */
 
@@ -642,10 +652,10 @@ rlePutBuffer (bool            const repeatMode,
     assert(count <= 128);
 
     if (repeatMode) {
-        fputc((257 - count) % 256,  fP);
-        fputc(repeatitem, fP);
+        writeFileByte((257 - count) % 256, "rlePutBuffer", fP);
+        writeFileByte(repeatitem, "rlePutBuffer", fP);
     } else {
-        fputc(count - 1, fP);
+        writeFileByte(count - 1, "rlePutBuffer", fP);
         writeFile(itembuf, count, "rlePutBuffer", fP);
     }
 }