Enhance message if attribute is invalid

[colorize.git] / colorize.c

diff --git a/colorize.c b/colorize.c
index 0cfbaad0862809baf37a7e3a0037748e557d87f8..1e27fcae01878ea6f41c90adac3c52aa7138317b 100644 (file)
--- a/colorize.c
+++ b/colorize.c
@@ -120,7 +120,7 @@
 
 #define MAX_ATTRIBUTE_CHARS (5 * 2)
 
-#define VERSION "0.60"
+#define VERSION "0.61"
 
 typedef enum { false, true } bool;
 
@@ -215,6 +215,19 @@ static const struct option long_opts[] = {
     {  NULL,            0,                 NULL,      0                  },
 };
 
+enum attr_type {
+    ATTR_BOLD = 0x01,
+    ATTR_UNDERSCORE = 0x02,
+    ATTR_BLINK = 0x04,
+    ATTR_REVERSE = 0x08,
+    ATTR_CONCEALED = 0x10
+};
+struct attr {
+    const char *name;
+    unsigned int val;
+    enum attr_type type;
+};
+
 static FILE *stream;
 #if DEBUG
 static FILE *log;
@@ -233,7 +246,7 @@ static const char *program_name;
 
 static void process_opts (int, char **);
 static void process_opt_attr (const char *);
-static void write_attr (unsigned int);
+static void write_attr (const struct attr *, unsigned int *);
 static void print_hint (void);
 static void print_help (void);
 static void print_version (void);
@@ -369,13 +382,9 @@ process_opts (int argc, char **argv)
             case 0: /* long opts */
               switch (opt_type)
                 {
-                  case OPT_ATTR: {
-                    char *opt;
-                    opt = xstrdup (optarg);
-                    process_opt_attr (opt);
-                    free (opt);
+                  case OPT_ATTR:
+                    process_opt_attr (optarg);
                     break;
-                  }
                   case OPT_CLEAN:
                     clean = true;
                     break;
@@ -424,6 +433,16 @@ process_opts (int argc, char **argv)
 static void
 process_opt_attr (const char *p)
 {
+    /* If attributes are added to this "list", also increase MAX_ATTRIBUTE_CHARS!  */
+    const struct attr attrs[] = {
+        { "bold",       1, ATTR_BOLD       },
+        { "underscore", 4, ATTR_UNDERSCORE },
+        { "blink",      5, ATTR_BLINK      },
+        { "reverse",    7, ATTR_REVERSE    },
+        { "concealed",  8, ATTR_CONCEALED  },
+    };
+    unsigned int attr_types = 0;
+
     while (*p)
       {
         const char *s;
@@ -436,19 +455,27 @@ process_opt_attr (const char *p)
           vfprintf_fail (formats[FMT_GENERIC], "--attr switch must have strings separated by ,");
         else
           {
-            /* If attributes are added to this "list", also increase MAX_ATTRIBUTE_CHARS!  */
-            if (p - s == 4 && strneq (s, "bold", 4))
-              write_attr (1);
-            else if (p - s == 10 && strneq (s, "underscore", 10))
-              write_attr (4);
-            else if (p - s == 5 && strneq (s, "blink", 5))
-              write_attr (5);
-            else if (p - s == 7 && strneq (s, "reverse", 7))
-              write_attr (7);
-            else if (p - s == 9 && strneq (s, "concealed", 9))
-              write_attr (8);
-            else
-              vfprintf_fail (formats[FMT_GENERIC], "--attr switch must be provided valid attribute names");
+            bool valid_attr = false;
+            unsigned int i;
+            for (i = 0; i < sizeof (attrs) / sizeof (struct attr); i++)
+              {
+                const size_t name_len = strlen (attrs[i].name);
+                if ((size_t)(p - s) == name_len && strneq (s, attrs[i].name, name_len))
+                  {
+                    write_attr (&attrs[i], &attr_types);
+                    valid_attr = true;
+                    break;
+                  }
+              }
+            if (!valid_attr)
+              {
+                char *sep;
+                char *attr_invalid = xstrdup (s);
+                STACK_VAR (attr_invalid);
+                if ((sep = strchr (attr_invalid, ',')))
+                  *sep = '\0';
+                vfprintf_fail ("--attr switch attribute '%s' is not valid", attr_invalid);
+              }
           }
         if (*p)
           p++;
@@ -456,9 +483,16 @@ process_opt_attr (const char *p)
 }
 
 static void
-write_attr (unsigned int val)
+write_attr (const struct attr *attr_i, unsigned int *attr_types)
 {
+    const unsigned int val = attr_i->val;
+    const enum attr_type attr_type = attr_i->type;
+    const char *attr_name = attr_i->name;
+
+    if (*attr_types & attr_type)
+      vfprintf_fail ("--attr switch has attribute '%s' twice or more", attr_name);
     snprintf (attr + strlen (attr), 3, "%u;", val);
+    *attr_types |= attr_type;
 }
 
 static void
@@ -530,22 +564,23 @@ print_version (void)
 #endif
     const char *version_prefix, *version_string;
     const char *c_flags, *ld_flags, *cpp_flags;
+    const char *const desc_flags_unknown = "unknown";
     struct bytes_size bytes_size;
     bool debug;
 #ifdef CFLAGS
     c_flags = to_str (CFLAGS);
 #else
-    c_flags = "unknown";
+    c_flags = desc_flags_unknown;
 #endif
 #ifdef LDFLAGS
     ld_flags = to_str (LDFLAGS);
 #else
-    ld_flags = "unknown";
+    ld_flags = desc_flags_unknown;
 #endif
 #ifdef CPPFLAGS
     cpp_flags = to_str (CPPFLAGS);
 #else
-    cpp_flags = "unknown";
+    cpp_flags = desc_flags_unknown;
 #endif
 #if DEBUG
     debug = true;
@@ -746,15 +781,15 @@ skip_path_colors (const char *color_string, const char *file_string, const struc
 
     if (have_file)
       {
-        const char *file_exists = color_string;
+        const char *file_existing = color_string;
         if (file_string)
-          vfprintf_fail (formats[FMT_QUOTE], get_file_type (mode), file_exists, "cannot be used as color string");
+          vfprintf_fail (formats[FMT_QUOTE], get_file_type (mode), file_existing, "cannot be used as color string");
         else
           {
             if (VALID_FILE_TYPE (mode))
-              vfprintf_fail (formats[FMT_QUOTE], get_file_type (mode), file_exists, "must be preceded by color string");
+              vfprintf_fail (formats[FMT_QUOTE], get_file_type (mode), file_existing, "must be preceded by color string");
             else
-              vfprintf_fail (formats[FMT_QUOTE], get_file_type (mode), file_exists, "is not a valid file type");
+              vfprintf_fail (formats[FMT_QUOTE], get_file_type (mode), file_existing, "is not a valid file type");
           }
       }
 }
@@ -936,7 +971,7 @@ complete_part_line (const char *p, char **buf, FILE *stream)
             if (read_from_stream)
               save_char (ch, buf, &i, &size);
           }
-        else /* read next character */
+        else /* got next character */
           {
             got_next_char = true;
             break;