[PATCH] xkbcomp: Improved -w option parsing

[Vincent Lefevre]

This patch improves -w option parsing even further, for cases like
"xkbcomp -w6 4.xkb out.xkb" (which were not handled by the fix of
#66344). Moreover, though this form can be regarded as ambiguous,
the warning level is still optional (set to 0 if not present), and
errors like "xkbcomp -wfoo in out" are detected and reported.

Signed-off-by: Vincent Lefevre <vincent at vinc17.net>
---
 xkbcomp.c | 29 +++++++++++++++++++++++------
 1 file changed, 23 insertions(+), 6 deletions(-)

diff --git a/xkbcomp.c b/xkbcomp.c
index 956e79c..1bb8ab2 100644
--- a/xkbcomp.c
+++ b/xkbcomp.c
@@ -576,17 +576,33 @@ parseArgs(int argc, char *argv[])
         }
         else if (strncmp(argv[i], "-w", 2) == 0)
         {
-            if ((i >= (argc - 1)) || (!isdigit(argv[i + 1][0])))
+            unsigned long utmp;
+            char *tmp2;
+            /* If text is just after "-w" in the same word, then it must
+             * be a number and it is the warning level. Otherwise, if the
+             * next argument is a number, then it is the warning level,
+             * else the warning level is assumed to be 0.
+             */
+            if (argv[i][2] == '\0')
             {
                 warningLevel = 0;
-                if (isdigit(argv[i][2]))
-                    if (sscanf(&argv[i][2], "%i", &itmp) == 1)
-                        warningLevel = itmp;
+                if (i < argc - 1)
+                {
+                    utmp = strtoul(argv[i+1], &tmp2, 10);
+                    if (argv[i+1][0] != '\0' && *tmp2 == '\0')
+                    {
+                        warningLevel = utmp > 10 ? 10 : utmp;
+                        i++;
+                    }
+                }
             }
             else
             {
-                if (sscanf(argv[++i], "%i", &itmp) == 1)
-                    warningLevel = itmp;
+                utmp = strtoul(&argv[i][2], &tmp2, 10);
+                if (*tmp2 == '\0')
+                    warningLevel = utmp > 10 ? 10 : utmp;
+                else
+                    goto unknown_flag;
             }
         }
         else if ((strcmp(argv[i], "-xkb") == 0) && (!xkblist))
@@ -619,6 +635,7 @@ parseArgs(int argc, char *argv[])
         }
         else
         {
+          unknown_flag:
             ERROR1("Unknown flag \"%s\" on command line\n", argv[i]);
             Usage(argc, argv);
             return False;
-- 
2.0.1