getpass.c: Move interface to own file.

[nmh] / test / getcwidth.c

diff --git a/test/getcwidth.c b/test/getcwidth.c
index 9e1ba65c456adb64fb82ce467b97088644a2eccc..165f12ab0142036f01c8593cd2db05b380801905 100644 (file)
--- a/test/getcwidth.c
+++ b/test/getcwidth.c
@@ -1,5 +1,4 @@
-/*
- * getcwidth - Get the OS's idea of the width of Unicode codepoints
+/* getcwidth - Get the OS's idea of the width of Unicode codepoints
  *
  * This code is Copyright (c) 2013, by the authors of nmh.  See the
  * COPYRIGHT file in the root directory of the nmh distribution for
@@ -18,11 +17,13 @@
 #ifdef MULTIBYTE_SUPPORT
 #include <locale.h>
 #include <wchar.h>
+#include <wctype.h>
 #endif
 
 #ifdef MULTIBYTE_SUPPORT
 static void usage(char *);
 static void dumpwidth(void);
+static void dumpctype(void);
 static void getwidth(const char *);
 #endif /* MULTIBYTE_SUPPORT */
 
@@ -30,13 +31,18 @@ int
 main(int argc, char *argv[])
 {
 #ifndef MULTIBYTE_SUPPORT
+       (void) argc;
+       (void) argv;
        fprintf(stderr, "Nmh was not configured with multibyte support\n");
        exit(1);
 #else /* MULTIBYTE_SUPPORT */
        wchar_t c;
        int i;
 
-       setlocale(LC_ALL, "");
+       if (! setlocale(LC_ALL, "")) {
+               fprintf(stderr, "setlocale failed, check your LC_ALL, "
+                   "LC_CTYPE, and LANG environment variables\n");
+       }
 
        if (argc < 2)
                usage(argv[0]);
@@ -52,6 +58,15 @@ main(int argc, char *argv[])
                }
        }
 
+       if (strcmp(argv[1], "--ctype") == 0) {
+               if (argc != 2) {
+                       fprintf(stderr, "--ctype cannot be combined with other arguments\n");
+                       exit(1);
+               }
+               dumpctype();
+               exit(0);
+       }
+
        /*
         * Process each argument.  If it begins with "U+", then try to
         * convert it to a Unicode codepoint.  Otherwise, take each
@@ -87,11 +102,13 @@ static void
 usage(char *argv0)
 {
        fprintf(stderr, "Usage: %s [--dump]\n", argv0);
+       fprintf(stderr, "       %s [--ctype]\n", argv0);
        fprintf(stderr, "       %s U+XXXX [...]\n", argv0);
        fprintf(stderr, "       %s utf-8-sequence [...]\n", argv0);
        fprintf(stderr, "Returns the column width of a Unicode codepoint "
                "or UTF-8 character sequence\n");
        fprintf(stderr, "\t--dump\tDump complete width table\n");
+       fprintf(stderr, "\t--ctype\tPrint wctype(3) table.\n");
 
        exit(1);
 }
@@ -109,7 +126,7 @@ getwidth(const char *string)
         * at a time.
         */
 
-       mbtowc(NULL, NULL, 0);
+       if (mbtowc(NULL, NULL, 0)) {}
 
        while (charleft > 0) {
                int clen;
@@ -139,25 +156,88 @@ getwidth(const char *string)
        printf("%d\n", length);
 }
 
+typedef struct {
+       wchar_t min, max;
+} unicode_range;
+
+static unicode_range range[] = {
+       /* https://en.wikipedia.org/wiki/Unicode#Code_point_planes_and_blocks */
+       {  L'\x0000',    L'\xff' },
+#if WCHAR_MAX >= 0xffff
+       {  L'\x0100',  L'\xffff' },
+#if WCHAR_MAX >= 0xfffff
+       { L'\x10000', L'\x14fff' },
+       { L'\x16000', L'\x18fff' },
+       { L'\x1b000', L'\x1bfff' },
+       { L'\x1d000', L'\x1ffff' },
+       { L'\x20000', L'\x2ffff' },
+       { L'\xe0000', L'\xe0fff' },
+#endif
+#endif
+       { L'\0', L'\0' }, /* Terminates list. */
+};
+
 static void
 dumpwidth(void)
 {
-       wchar_t wc, low;
+       unicode_range *r;
+       int first;
+       wchar_t wc, start;
        int width, lastwidth;
 
-       for (wc = 0, low = 1, lastwidth = wcwidth(1); wc < 0xffff; wc++) {
-               width = wcwidth(wc+1);
-               if (width != lastwidth) {
-                       printf("%04lX - %04lX = %d\n", (unsigned long int) low,
-                              (unsigned long int) (wc), lastwidth);
-                       low = wc+1;
+       for (r = range; r->max; r++) {
+               first = 1;
+               for (wc = r->min; wc <= r->max; wc++) {
+                       width = wcwidth(wc);
+                       if (first) {
+                               start = wc;
+                               lastwidth = width;
+                               first = 0;
+                               continue;
+                       }
+                       if (width != lastwidth) {
+                               printf("%04lX - %04lX = %d\n", (unsigned long)start,
+                                          (unsigned long int)wc - 1, lastwidth);
+                               start = wc;
+                               lastwidth = width;
+                       }
+                       if (wc == r->max) {
+                               printf("%04lX - %04lX = %d\n", (unsigned long)start,
+                                          (unsigned long int)wc, lastwidth);
+                /* wchar_t can be a 16-bit unsigned short. */
+                break;
+            }
                }
-               lastwidth = width;
        }
-
-       width = wcwidth(wc);
-       if (width == lastwidth)
-               printf("%04lX - %04lX = %d\n", (unsigned long int) low,
-                      (unsigned long int) (wc), width);
 }
+
+static void
+dumpctype(void)
+{
+       unicode_range *r;
+       wchar_t wc;
+
+       for (r = range; r->max; r++) {
+               for (wc = r->min; wc <= r->max; wc++) {
+                       printf("%6x  %2d  %c%c%c%c%c%c%c%c%c%c%c%c\n",
+                               wc, wcwidth(wc),
+                               iswcntrl(wc) ? 'c' : '-',
+                               iswprint(wc) ? 'p' : '-',
+                               iswgraph(wc) ? 'g' : '-',
+                               iswalpha(wc) ? 'a' : '-',
+                               iswupper(wc) ? 'u' : '-',
+                               iswlower(wc) ? 'l' : '-',
+                               iswdigit(wc) ? 'd' : '-',
+                               iswxdigit(wc) ? 'x' : '-',
+                               iswalnum(wc) ? 'N' : '-',
+                               iswpunct(wc) ? '@' : '-',
+                               iswspace(wc) ? 's' : '-',
+                               iswblank(wc) ? 'b' : '-');
+
+            if (wc == r->max)
+                /* wchar_t can be a 16-bit unsigned short. */
+                break;
+               }
+       }
 #endif /* MULTIBYTE_SUPPORT */
+}