From c8b0fc89c210734002f04d1ec912dac4c7c36d79 Mon Sep 17 00:00:00 2001
From: Chris Love <christopherlove68@gmail.com>
Date: Sat, 4 Sep 2021 13:47:59 -0700
Subject: [PATCH] Support building spdlog_udp on Windows

---
 spdlog_udp/CMakeLists.txt |  2 +-
 spdlog_udp/udp.cpp        | 77 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 78 insertions(+), 1 deletion(-)

diff --git a/spdlog_udp/CMakeLists.txt b/spdlog_udp/CMakeLists.txt
index 1bc1e34..5318f48 100644
--- a/spdlog_udp/CMakeLists.txt
+++ b/spdlog_udp/CMakeLists.txt
@@ -10,5 +10,5 @@ set (spdlog_udp_SRC
 
 add_executable( spdlog_udp ${spdlog_udp_SRC})
 
-target_link_libraries( spdlog_udp spdlog::spdlog pthread )
+target_link_libraries( spdlog_udp spdlog::spdlog Threads::Threads )
 
diff --git a/spdlog_udp/udp.cpp b/spdlog_udp/udp.cpp
index 4cb0b4e..8e75fd3 100644
--- a/spdlog_udp/udp.cpp
+++ b/spdlog_udp/udp.cpp
@@ -5,7 +5,9 @@
 #include <chrono>
 #include <iostream>
 #include <memory>
+#ifndef WIN32
 #include <unistd.h>
+#endif
 
 class TraceMethod
 {
@@ -84,6 +86,81 @@ void usage()
               << "spdlog_console [-l <logLevel>][-i <ipAddr>][-p <port>]\n";
 }
 
+#ifdef WIN32
+#include <string.h>
+#include <stdio.h>
+
+int     opterr = 1,             /* if error message should be printed */
+  optind = 1,             /* index into parent argv vector */
+  optopt,                 /* character checked for validity */
+  optreset;               /* reset getopt */
+char    *optarg;                /* argument associated with option */
+
+#define BADCH   (int)'?'
+#define BADARG  (int)':'
+#define EMSG    ""
+
+/*
+* getopt --
+*      Parse argc/argv argument vector.
+*/
+int
+  getopt(int nargc, char * const nargv[], const char *ostr)
+{
+  static char *place = EMSG;              /* option letter processing */
+  const char *oli;                        /* option letter list index */
+
+  if (optreset || !*place) {              /* update scanning pointer */
+    optreset = 0;
+    if (optind >= nargc || *(place = nargv[optind]) != '-') {
+      place = EMSG;
+      return (-1);
+    }
+    if (place[1] && *++place == '-') {      /* found "--" */
+      ++optind;
+      place = EMSG;
+      return (-1);
+    }
+  }                                       /* option letter okay? */
+  if ((optopt = (int)*place++) == (int)':' ||
+    !(oli = strchr(ostr, optopt))) {
+      /*
+      * if the user didn't specify '-' as an option,
+      * assume it means -1.
+      */
+      if (optopt == (int)'-')
+        return (-1);
+      if (!*place)
+        ++optind;
+      if (opterr && *ostr != ':')
+        (void)printf("illegal option -- %c\n", optopt);
+      return (BADCH);
+  }
+  if (*++oli != ':') {                    /* don't need argument */
+    optarg = NULL;
+    if (!*place)
+      ++optind;
+  }
+  else {                                  /* need an argument */
+    if (*place)                     /* no white space */
+      optarg = place;
+    else if (nargc <= ++optind) {   /* no arg */
+      place = EMSG;
+      if (*ostr == ':')
+        return (BADARG);
+      if (opterr)
+        (void)printf("option requires an argument -- %c\n", optopt);
+      return (BADCH);
+    }
+    else                            /* white space */
+      optarg = nargv[optind];
+    place = EMSG;
+    ++optind;
+  }
+  return (optopt);                        /* dump back option letter */
+}
+#endif
+
 int main(int argc, char **argv)
 {
     int logLevel = spdlog::level::trace;