Import getline helper from cdecl99.

[dxcommon.git] / src / help.c

diff --git a/src/help.c b/src/help.c
index c537eefa29f05eacf08c596158d23d6a6ef0ffd5..2e6043bea760b74c58d3b644358f48808a768324 100644 (file)
--- a/src/help.c
+++ b/src/help.c
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2021-2023 Nick Bowler
+ * Copyright © 2021-2024 Nick Bowler
  *
  * Helper functions for formatting --help program output.
  *
@@ -72,38 +72,44 @@ enum {
        OPT_SHORT_WITHOUT_ARG        = 4,
        OPT_LONG_WITH_OPTIONAL_ARG   = 2,
        OPT_LONG_WITH_MANDATORY_ARG  = 1,
-       OPT_LONG_WITHOUT_ARG         = 0,
+       OPT_LONG_WITHOUT_ARG         = 0
 };
 
 #if HELP_GETOPT_LONG_ONLY
 /* String table generated by gen-strtab.awk from help-glo.str */
 #define STRTAB_INITIALIZER \
-            N_("  -%s [%s]") \
-       "\0" N_("  -%s %s") \
-       "\0" N_("  -%s") \
+            N_(" -%s [%s]") \
+       "\0" "%*s%.*s\n" \
+       "\0" N_(" -%s %s") \
+       "\0" N_(" -%s") \
        ""
 enum {
        fmt_long_optional_arg = 0,
-       fmt_long_mandatory_arg = 11,
-       fmt_long_without_arg = 20
+       fmt_long_mandatory_arg = 19,
+       fmt_long_without_arg = 27,
+       fmt_desc = 10,
+       fmt_nl = 17
 };
 #else
 /* String table generated by gen-strtab.awk from help-std.str */
 #define STRTAB_INITIALIZER \
-            N_("  -%c, --%s[=%s]") \
-       "\0" N_("  -%c, --%s=%s") \
-       "\0" N_("  --%s[=%s]") \
-       "\0" N_("  -%c, --%s") \
-       "\0" N_("  --%s=%s") \
-       "\0" N_("  --%s") \
+       STR_L10N_(N_(" --%s[=%s]")) \
+       STR_L10N_(N_(" --%s=%s")) \
+       STR_L10N_(N_(" --%s")) \
+            N_(" -%c, --%s[=%s]") \
+       "\0" N_(" -%c, --%s=%s") \
+       "\0" N_(" -%c, --%s") \
+       "\0" "%*s%.*s\n" \
        ""
 enum {
        fmt_short_optional_arg = 0,
-       fmt_long_optional_arg = 32,
-       fmt_short_mandatory_arg = 17,
-       fmt_long_mandatory_arg = 56,
-       fmt_short_without_arg = 44,
-       fmt_long_without_arg = 66
+       fmt_long_optional_arg = 5,
+       fmt_short_mandatory_arg = 16,
+       fmt_long_mandatory_arg = 21,
+       fmt_short_without_arg = 30,
+       fmt_long_without_arg = 35,
+       fmt_desc = 41,
+       fmt_nl = 48
 };
 #endif
 
@@ -177,7 +183,7 @@ no_translate:
                w = printf(fmt, opt->name, argname);
        }
 out:
-       if (w < 0 || w > l) {
+       if (w <= 0 || w > l) {
                putchar('\n');
                return 0;
        }
@@ -191,9 +197,9 @@ void help_print_desc(const struct option *opt, const char *s, int i, int w)
                s = pgettext_expr(opt->name, s);
 
        do {
-               size_t n = strcspn(s, "\n");
+               size_t n = strcspn(s, &optstr.tab[fmt_nl]);
 
-               printf("%*s%.*s\n", n ? i-w : 0, "", (int)n, s);
+               printf(&optstr.tab[fmt_desc], n ? i-w : 0, "", (int)n, s);
                s += n + (s[n] != '\0');
                w = 0;
        } while (*s);