1 /*****************************************************************************/
5 /* Helper functions for command line parsing */
9 /* (C) 2000 Ullrich von Bassewitz */
11 /* D-70597 Stuttgart */
12 /* EMail: uz@musoftware.de */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
43 /*****************************************************************************/
45 /*****************************************************************************/
49 static char** ArgVec = 0;
50 static unsigned ArgCount = 0;
54 /*****************************************************************************/
56 /*****************************************************************************/
60 void InitCmdLine (unsigned aArgCount, char* aArgVec[])
61 /* Initialize command line parsing. aArgVec is the argument array terminated by
62 * a NULL pointer (as usual), ArgCount is the number of valid arguments in the
63 * array. Both arguments are remembered in static storage.
72 void UnknownOption (const char* Opt)
73 /* Print an error about an unknown option. */
75 fprintf (stderr, "Unknown option: %s\n", Opt);
81 void NeedArg (const char* Opt)
82 /* Print an error about a missing option argument and exit. */
84 fprintf (stderr, "Option requires an argument: %s\n", Opt);
90 void InvSym (const char* Def)
91 /* Print an error about an invalid symbol definition and die */
93 fprintf (stderr, "Invalid symbol definition: `%s'\n", Def);
99 const char* GetArg (int* ArgNum, unsigned Len)
100 /* Get an argument for a short option. The argument may be appended to the
101 * option itself or may be separate. Len is the length of the option string.
104 const char* Arg = ArgVec[*ArgNum];
105 if (Arg[Len] != '\0') {
106 /* Argument appended */
109 /* Separate argument */
110 Arg = ArgVec[*ArgNum + 1];
112 /* End of arguments */
113 NeedArg (ArgVec[*ArgNum]);
122 void LongOption (int* ArgNum, const LongOpt* OptTab, unsigned OptCount)
123 /* Handle a long command line option */
125 /* Get the option and the argument (which may be zero) */
126 const char* Opt = ArgVec[*ArgNum];
128 /* Search the table for a match */
130 if (strcmp (Opt, OptTab->Option) == 0) {
131 /* Found, call the function */
132 if (OptTab->ArgCount > 0) {
133 OptTab->Func (Opt, ArgVec[++(*ArgNum)]);
135 OptTab->Func (Opt, 0);
141 /* Next table entry */