urlencoding: adding utility

1 files changed, 256 insertions, 0 deletions

diff --git a/src/urlencoding.c b/src/urlencoding.c
new file mode 100644
index 0000000..69079bc
--- /dev/null
+++ b/src/urlencoding.c
@@ -0,0 +1,256 @@
+/*
+ *  DMS Tools and Utilities
+ *  Copyright (C) 2022 David M. Syzdek <david@syzdek.net>.
+ *  All rights reserved.
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions are
+ *  met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of David M. Syzdek nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ *  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ *  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ *  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DAVID M. SYZDEK BE LIABLE FOR
+ *  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ *  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ *  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ *  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ *  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ *  SUCH DAMAGE.
+ */
+#define _SRC_URLENCODING_C 1
+
+///////////////
+//           //
+//  Headers  //
+//           //
+///////////////
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+#include <stdarg.h>
+#include <getopt.h>
+#include <arpa/inet.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <stdlib.h>
+#include <netdb.h>
+
+#include <bindle_prefix.h>
+
+
+///////////////////
+//               //
+//  Definitions  //
+//               //
+///////////////////
+
+#ifndef PROGRAM_NAME
+#define PROGRAM_NAME "urlencoding"
+#endif
+#ifndef PACKAGE_BUGREPORT
+#define PACKAGE_BUGREPORT "david@syzdek.net"
+#endif
+#ifndef PACKAGE_COPYRIGHT
+#define PACKAGE_COPYRIGHT ""
+#endif
+#ifndef PACKAGE_NAME
+#define PACKAGE_NAME ""
+#endif
+#ifndef PACKAGE_VERSION
+#define PACKAGE_VERSION ""
+#endif
+
+#define MY_OPT_ENCODE         0x00000001UL
+#define MY_OPT_DECODE         0x00000002UL
+#define MY_OPT_VERBOSE        0x00010000UL
+#define MY_OPT_QUIET          0x00020000UL
+
+
+//////////////////
+//              //
+//  Prototypes  //
+//              //
+//////////////////
+
+int
+main(
+         int                           argc,
+         char *                        argv[] );
+
+
+static int
+my_error(
+         unsigned                      opts,
+         const char *                  fmt,
+         ... );
+
+
+/////////////////
+//             //
+//  Functions  //
+//             //
+/////////////////
+
+int
+main(
+         int                           argc,
+         char *                        argv[] )
+{
+   int               c;
+   int               opt_index;
+   unsigned          opts;
+   char *            buff;
+   void *            ptr;
+   size_t            size;
+
+   // getopt options
+   static char          short_opt[] = "dehVvqs";
+   static struct option long_opt[] =
+   {
+      {"decode",           no_argument,       NULL, 'd' },
+      {"encode",           no_argument,       NULL, 'e' },
+      {"help",             no_argument,       NULL, 'h' },
+      {"quiet",            no_argument,       NULL, 'q' },
+      {"silent",           no_argument,       NULL, 'q' },
+      {"version",          no_argument,       NULL, 'V' },
+      {"verbose",          no_argument,       NULL, 'v' },
+      { NULL, 0, NULL, 0 }
+   };
+
+   opts = 0;
+
+   while((c = getopt_long(argc, argv, short_opt, long_opt, &opt_index)) != -1)
+   {
+      switch(c)
+      {
+         case -1:       /* no more arguments */
+         case 0:        /* long options toggles */
+         break;
+
+         case 'd':
+         opts |=  MY_OPT_DECODE;
+         opts &= ~MY_OPT_ENCODE;
+         break;
+
+         case 'e':
+         opts |=  MY_OPT_ENCODE;
+         opts &= ~MY_OPT_DECODE;
+         break;
+
+         case 'h':
+         printf("Usage: %s [OPTIONS] string1 [ string2 [ ... [ stringN ] ] ]\n", PROGRAM_NAME);
+         printf("OPTIONS:\n");
+         printf("  -d, --decode              decode string\n");
+         printf("  -e, --encode              encode string\n");
+         printf("  -h, --help                print this help and exit\n");
+         printf("  -q, --quiet, --silent     do not print messages\n");
+         printf("  -V, --version             print version number and exit\n");
+         printf("  -v, --verbose             print verbose messages\n");
+         printf("\n");
+         return(0);
+
+         case 'q':
+         opts |=  MY_OPT_QUIET;
+         opts &= ~MY_OPT_VERBOSE;
+         break;
+
+         case 'V':
+         printf("%s (%s) %s\n", PACKAGE_NAME, PACKAGE_NAME, PACKAGE_VERSION);
+         return(0);
+
+         case 'v':
+         opts |=  MY_OPT_VERBOSE;
+         opts &= ~MY_OPT_QUIET;
+         break;
+
+         case '?':
+         fprintf(stderr, "Try `%s --help' for more information.\n", PROGRAM_NAME);
+         return(1);
+
+         default:
+         fprintf(stderr, "%s: unrecognized option `--%c'\n", PROGRAM_NAME, c);
+         fprintf(stderr, "Try `%s --help' for more information.\n", PROGRAM_NAME);
+         return(1);
+      };
+   };
+
+   if (optind == argc)
+   {
+      fprintf(stderr, "%s: missing required argument\n", PROGRAM_NAME);
+      fprintf(stderr, "Try `%s --help' for more information.\n", PROGRAM_NAME);
+      return(1);
+   };
+
+   // loop through URLs
+   buff = NULL;
+   while (optind < argc)
+   {
+      if ((opts & MY_OPT_DECODE))
+      {
+         size = strlen(argv[optind]) + 1;
+         if ((ptr = realloc(buff, size)) == NULL)
+         {
+            my_error(opts, "out of virtual memory");
+            free(buff);
+            return(1);
+         };
+         buff = ptr;
+         dmstools_url_decode(argv[optind], buff, size);
+         printf("%s\n", buff);
+      } else
+      {
+         size = dmstools_url_encode_len(argv[optind]);
+         if ((ptr = realloc(buff, size)) == NULL)
+         {
+            my_error(opts, "out of virtual memory");
+            free(buff);
+            return(1);
+         };
+         buff = ptr;
+         dmstools_url_encode(argv[optind], buff, size);
+         printf("%s\n", buff);
+      };
+      optind++;
+   };
+
+   free(buff);
+
+   return(0);
+}
+
+
+int
+my_error(
+         unsigned                      opts,
+         const char *                  fmt,
+         ... )
+{
+   va_list args;
+   if ((opts & MY_OPT_QUIET))
+      return(1);
+   fprintf(stderr, "%s: ", PROGRAM_NAME);
+   va_start(args, fmt);
+   vfprintf(stderr, fmt, args);
+   va_end(args);
+   fprintf(stderr, "\n");
+   return(1);
+}
+
+
+// end of source file