wcwidth: print running measure

src/poc/wcwidth.c

@@ -9,43 +9,59 @@ int main(int argc, char **argv){
   if(!setlocale(LC_ALL, "")){
     return EXIT_FAILURE;
   }
-  if(argc > 1){
-    while(*++argv){
-      const char* arg = *argv;
-      int totalcols = 0;
-      size_t totalb = 0;
-      int i = 0;
-      while(*arg){
-        mbstate_t mbs = {};
-        wchar_t w;
-        size_t conv = mbrtowc(&w, arg, strlen(arg), &mbs);
-        if(conv == (size_t)-1 || conv == (size_t)-2){
-          fprintf(stderr, "Invalid UTF-8: %s\n", arg);
-          return EXIT_FAILURE;
-        }
-        int width = wcwidth(w);
-        printf("0x%05lx: %d %lc\t", (long)w, width, w);
-        if(i++ % 4 == 3){
-          printf("\n");
-        }
-        if(width > 0){
-          totalcols += width;
-        }
-        arg += conv;
-        totalb += conv;
+  if(argc <= 1){
+    for(int i = 0 ; i < 128 ; ++i){
+      wchar_t w = i;
+      int width = wcwidth(w);
+      printf("0x%02x: %d%c\t", i, width, width < 0 ? '!' : ' ');
+      if(i % 4 == 3){
+        printf("\n");
       }
-      printf("\n Total width: %d  total bytes: %zu\n\n", totalcols, totalb);
     }
+    printf("\n");
     return EXIT_SUCCESS;
   }
-  for(int i = 0 ; i < 128 ; ++i){
-    wchar_t w = i;
-    int width = wcwidth(w);
-    printf("0x%02x: %d%c\t", i, width, width < 0 ? '!' : ' ');
-    if(i % 4 == 3){
-      printf("\n");
+  while(*++argv){
+    const char* arg = *argv;
+    int totalcols = 0;
+    size_t totalb = 0;
+    int i = 0;
+    while(*arg){
+      mbstate_t mbs = {};
+      wchar_t w;
+      size_t conv = mbrtowc(&w, arg, strlen(arg), &mbs);
+      if(conv == (size_t)-1 || conv == (size_t)-2){
+        fprintf(stderr, "Invalid UTF-8: %s\n", arg);
+        return EXIT_FAILURE;
+      }
+      int width = wcwidth(w);
+      printf("0x%05lx: %d %lc\t", (long)w, width, w);
+      if(i++ % 4 == 3){
+        printf("\n");
+      }
+      if(width > 0){
+        totalcols += width;
+      }
+      arg += conv;
+      totalb += conv;
+    }
+    printf("\n total width: %d  total bytes: %zu\n\n", totalcols, totalb);
+    // FIXME this will be broken if totalcols > screen width
+    printf("%s\n", *argv);
+    for(int z = 0 ; z < totalcols ; ++z){
+      putchar('0' + z % 10);
+    }
+    putchar('\n');
+    if(totalcols > 20){
+      for(int z = 0 ; z < totalcols ; ++z){
+        if(z % 10){
+          putchar(' ');
+        }else{
+          putchar('0' + z / 10);
+        }
+      }
+      putchar('\n');
     }
   }
-  printf("\n");
   return EXIT_SUCCESS;
 }