Wrap configure --help text at 80 chars

gvanem · Jul 18, 2023 · 551d8b5 · 551d8b5
1 parent df7dc8b
commit 551d8b5
Showing 1 changed file with 69 additions and 31 deletions.
diff --git a/util/mkconf.c b/util/mkconf.c
@@ -13,39 +13,39 @@ enum optval {
      OPT_DISABLE
    };
 
-static struct cfgopt options[] =
+static const struct cfgopt options[] =
 {
-  { "debug",            "DEBUG",            "Include debug code" },
-  { "multicast",        "MULTICAST",        "Include IP multicast code by Jim Martin" },
-  { "bind",             "BIND",             "Include Bind resolver code" },
-  { "bsd-api",          "BSD_API",          "Include BSD-sockets" },
-  { "bsd-fatal",        "BSD_FATAL",        "Exit application on BSD-socket fatal errors" },
-  { "bootp",            "BOOTP",            "Include BOOTP client code" },
-  { "dhcp",             "DHCP",             "Include DHCP boot client code" },
+  { "debug",            "DEBUG",            "Include debug code." },
+  { "multicast",        "MULTICAST",        "Include IP multicast code by Jim Martin." },
+  { "bind",             "BIND",             "Include Bind resolver code." },
+  { "bsd-api",          "BSD_API",          "Include BSD-sockets." },
+  { "bsd-fatal",        "BSD_FATAL",        "Exit application on BSD-socket fatal errors." },
+  { "bootp",            "BOOTP",            "Include BOOTP client code." },
+  { "dhcp",             "DHCP",             "Include DHCP boot client code." },
   { "rarp",             "RARP",             "Include RARP boot client code.  Contributed by Dan Kegel." },
-  { "geoip",            "GEOIP",            "Include GeoIP support. From Tor's geoip.c" },
-  { "ipv6",             "IPV6",             "Include IPv6 dual-stack support" },
-  { "language",         "LANGUAGE",         "Include Language translation code" },
-  { "fragments",        "FRAGMENTS",        "Include IP-fragment handling" },
-  { "statistics",       "STATISTICS",       "Include protocol statistics count" },
+  { "geoip",            "GEOIP",            "Include GeoIP support.  From Tor's geoip.c." },
+  { "ipv6",             "IPV6",             "Include IPv6 dual-stack support." },
+  { "language",         "LANGUAGE",         "Include Language translation code." },
+  { "fragments",        "FRAGMENTS",        "Include IP-fragment handling." },
+  { "statistics",       "STATISTICS",       "Include protocol statistics count." },
   { "stackwalker",      "STACKWALKER",      "Use StackWalker for allocations and crash-dumps." },
-  { "fsext",            "FSEXT",            "Use djgpp's File Extensions for file I/O functions" },
-  { "loopback",         "LOOPBACK",         "Use the simple loopback device" },
-  { "embedded",         "EMBEDDED",         "Make an embeddable (ROM-able) target.  See note in config.h" },
-  { "buffered-io",      "BUFFERED_IO",      "Use buffered file I/O in pcconfig.c.  Otherwise use a simple read-ahead cache" },
-  { "tftp",             "TFTP",             "Include TFTP protocol for simple file retrival" },
-  { "udp-only",         "UDP_ONLY",         "Exclude all stuff related to the TCP protocol" },
-  { "tcp-sack",         "TCP_SACK",         "Include TCP Selective ACK feature (not yet)" },
-  { "echo-disc",        "ECHO_DISC",        "Include echo/discard servers" },
-  { "pppoe",            "PPPOE",            "PPP-over-Ethernet encapsulation" },
-  { "fast-pkt",         "FAST_PKT",         "Use faster all real-mode PKTDRVR receiver (DOSX only)" },
-  { "dead-gwd",         "DEAD_GWD",         "Dead Gateway detection in ARP module" },
+  { "fsext",            "FSEXT",            "Use djgpp's File Extensions for file I/O functions." },
+  { "loopback",         "LOOPBACK",         "Use the simple loopback device." },
+  { "embedded",         "EMBEDDED",         "Make an embeddable (ROM-able) target.  See note in config.h." },
+  { "buffered-io",      "BUFFERED_IO",      "Use buffered file I/O in pcconfig.c.  Otherwise use a simple read-ahead cache." },
+  { "tftp",             "TFTP",             "Include TFTP protocol for simple file retrival." },
+  { "udp-only",         "UDP_ONLY",         "Exclude all stuff related to the TCP protocol." },
+  { "tcp-sack",         "TCP_SACK",         "Include TCP Selective ACK feature (not yet)." },
+  { "echo-disc",        "ECHO_DISC",        "Include echo/discard servers." },
+  { "pppoe",            "PPPOE",            "PPP-over-Ethernet encapsulation." },
+  { "fast-pkt",         "FAST_PKT",         "Use faster all real-mode PKTDRVR receiver (DOSX only)." },
+  { "dead-gwd",         "DEAD_GWD",         "Dead Gateway detection in ARP module." },
   { "gzip",             "GZIP",             "Use gzip compression for PPP and/or pcap debug file.  Also for SCTP." },
-  { "profiler",         "PROFILER",         "Include simple execution profiler (only DOSX with 64-bit types)" },
-  { "tcp-md5",          "TCP_MD5",          "TCP MD5 signature option" },
+  { "profiler",         "PROFILER",         "Include simple execution profiler (only DOSX with 64-bit types)." },
+  { "tcp-md5",          "TCP_MD5",          "TCP MD5 signature option." },
   { "idna",             "IDNA",             "Support national characters in DNS name lookups." },
-  { "dynip-cli",        "DYNIP_CLI",        "Support DynDNS.org name/IP client" },
-  { "sctp",             "SCTP",             "Stream Control Transfer Protocol; experimental" }
+  { "dynip-cli",        "DYNIP_CLI",        "Support DynDNS.org name/IP client." },
+  { "sctp",             "SCTP",             "Stream Control Transfer Protocol; experimental." }
 };
 
 #define NUM_OPTIONS (sizeof (options) / sizeof (struct cfgopt))
@@ -65,12 +65,50 @@ static int skip (const char* prefix, const char** arg)
 
 static void usage (void)
 {
+  const char * const prefix = "  --[en|dis]able-";
+  const int wrap_at         = 80;
+  const int name_len        = 13;
+  const int option_len      = strlen (prefix) + name_len;
+  const int help_len        = wrap_at - option_len;
+  const char *p, *space;
   int i;
 
-  printf("Available options:\n");
+  printf ("Available options:\n");
   for (i = 0; i < NUM_OPTIONS; ++i)
-      printf ("  --[en|dis]able-%-12s %s\n",
-              options[i].name, options[i].help);
+  {
+    p = options[i].help;
+    while (*p)
+    {
+      /* Skip spaces. */
+      while (*p == ' ') ++p;
+
+      space = p + strlen (p);
+      if (space - p > help_len)
+      {
+        /* Find last space character before wrap point. */
+        const char *q = p;
+        while (1)
+        {
+          q = strchr (q, ' ');
+          if (q && q - p < help_len)
+             space = q;
+          else break;
+          ++q;
+        }
+      }
+
+      /* Print option name. */
+      if (p == options[i].help)
+         printf ("%s%-*s", prefix, name_len, options[i].name);
+      else
+         printf ("%*c", option_len, ' ');
+
+      /* Print description. */
+      printf ("%.*s\n", (int)(space - p), p);
+
+      p = space;
+    }
+  }
 }
 
 int main (int argc, char** argv)