--- /dev/null
+/*****************************************************************************/
+/* */
+/* cmdline.c */
+/* */
+/* Helper functions for command line parsing */
+/* */
+/* */
+/* */
+/* (C) 2000 Ullrich von Bassewitz */
+/* Wacholderweg 14 */
+/* D-70597 Stuttgart */
+/* EMail: uz@musoftware.de */
+/* */
+/* */
+/* This software is provided 'as-is', without any expressed or implied */
+/* warranty. In no event will the authors be held liable for any damages */
+/* arising from the use of this software. */
+/* */
+/* Permission is granted to anyone to use this software for any purpose, */
+/* including commercial applications, and to alter it and redistribute it */
+/* freely, subject to the following restrictions: */
+/* */
+/* 1. The origin of this software must not be misrepresented; you must not */
+/* claim that you wrote the original software. If you use this software */
+/* in a product, an acknowledgment in the product documentation would be */
+/* appreciated but is not required. */
+/* 2. Altered source versions must be plainly marked as such, and must not */
+/* be misrepresented as being the original software. */
+/* 3. This notice may not be removed or altered from any source */
+/* distribution. */
+/* */
+/*****************************************************************************/
+
+
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "cmdline.h"
+
+
+
+/*****************************************************************************/
+/* Data */
+/*****************************************************************************/
+
+
+
+static char** ArgVec = 0;
+static unsigned ArgCount = 0;
+
+
+
+/*****************************************************************************/
+/* Code */
+/*****************************************************************************/
+
+
+
+void InitCmdLine (char* aArgVec[], unsigned aArgCount)
+/* Initialize command line parsing. aArgVec is the argument array terminated by
+ * a NULL pointer (as usual), ArgCount is the number of valid arguments in the
+ * array. Both arguments are remembered in static storage.
+ */
+{
+ ArgVec = aArgVec;
+ ArgCount = aArgCount;
+}
+
+
+
+void UnknownOption (const char* Opt)
+/* Print an error about an unknown option. */
+{
+ fprintf (stderr, "Unknown option: %s\n", Opt);
+ exit (EXIT_FAILURE);
+}
+
+
+
+void NeedArg (const char* Opt)
+/* Print an error about a missing option argument and exit. */
+{
+ fprintf (stderr, "Option requires an argument: %s\n", Opt);
+ exit (EXIT_FAILURE);
+}
+
+
+
+void InvSym (const char* Def)
+/* Print an error about an invalid symbol definition and die */
+{
+ fprintf (stderr, "Invalid symbol definition: `%s'\n", Def);
+ exit (EXIT_FAILURE);
+}
+
+
+
+const char* GetArg (int* ArgNum, unsigned Len)
+/* Get an argument for a short option. The argument may be appended to the
+ * option itself or may be separate. Len is the length of the option string.
+ */
+{
+ const char* Arg = ArgVec[*ArgNum];
+ if (Arg[Len] != '\0') {
+ /* Argument appended */
+ return Arg + Len;
+ } else {
+ /* Separate argument */
+ Arg = ArgVec[*ArgNum + 1];
+ if (Arg == 0) {
+ /* End of arguments */
+ NeedArg (ArgVec[*ArgNum]);
+ }
+ ++(*ArgNum);
+ return Arg;
+ }
+}
+
+
+
+void LongOption (int* ArgNum, const LongOpt* OptTab, unsigned OptCount)
+/* Handle a long command line option */
+{
+ /* Get the option and the argument (which may be zero) */
+ const char* Opt = ArgVec[*ArgNum];
+
+ /* Search the table for a match */
+ while (OptCount) {
+ if (strcmp (Opt, OptTab->Option) == 0) {
+ /* Found, call the function */
+ if (OptTab->ArgCount > 0) {
+ OptTab->Func (Opt, ArgVec[++(*ArgNum)]);
+ } else {
+ OptTab->Func (Opt, 0);
+ }
+ }
+
+ /* Next table entry */
+ --OptCount;
+ ++OptTab;
+ }
+
+ /* Invalid option */
+ UnknownOption (Opt);
+}
+
+
+
--- /dev/null
+/*****************************************************************************/
+/* */
+/* cmdline.h */
+/* */
+/* Helper functions for command line parsing */
+/* */
+/* */
+/* */
+/* (C) 2000 Ullrich von Bassewitz */
+/* Wacholderweg 14 */
+/* D-70597 Stuttgart */
+/* EMail: uz@musoftware.de */
+/* */
+/* */
+/* This software is provided 'as-is', without any expressed or implied */
+/* warranty. In no event will the authors be held liable for any damages */
+/* arising from the use of this software. */
+/* */
+/* Permission is granted to anyone to use this software for any purpose, */
+/* including commercial applications, and to alter it and redistribute it */
+/* freely, subject to the following restrictions: */
+/* */
+/* 1. The origin of this software must not be misrepresented; you must not */
+/* claim that you wrote the original software. If you use this software */
+/* in a product, an acknowledgment in the product documentation would be */
+/* appreciated but is not required. */
+/* 2. Altered source versions must be plainly marked as such, and must not */
+/* be misrepresented as being the original software. */
+/* 3. This notice may not be removed or altered from any source */
+/* distribution. */
+/* */
+/*****************************************************************************/
+
+
+
+#ifndef CMDLINE_H
+#define CMDLINE_H
+
+
+
+/*****************************************************************************/
+/* Data */
+/*****************************************************************************/
+
+
+
+/* Structure defining a long option */
+typedef struct LongOpt LongOpt;
+struct LongOpt {
+ const char* Option;
+ unsigned ArgCount;
+ void (*Func) (const char* Opt, const char* Arg);
+};
+
+
+
+/*****************************************************************************/
+/* Code */
+/*****************************************************************************/
+
+
+
+void InitCmdLine (char* aArgVec[], unsigned aArgCount);
+/* Initialize command line parsing. aArgVec is the argument array terminated by
+ * a NULL pointer (as usual), ArgCount is the number of valid arguments in the
+ * array. Both arguments are remembered in static storage.
+ */
+
+void UnknownOption (const char* Opt);
+/* Print an error about an unknown option. */
+
+void NeedArg (const char* Opt);
+/* Print an error about a missing option argument and exit. */
+
+void InvSym (const char* Def);
+/* Print an error about an invalid symbol definition and die */
+
+const char* GetArg (int* ArgNum, unsigned Len);
+/* Get an argument for a short option. The argument may be appended to the
+ * option itself or may be separate. Len is the length of the option string.
+ */
+
+void LongOption (int* ArgNum, const LongOpt* OptTab, unsigned OptCount);
+/* Handle a long command line option */
+
+
+
+/* End of cmdline.h */
+
+#endif
+
+
+
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