/* flex - tool to generate fast lexical analyzers */
/* Copyright (c) 1990 The Regents of the University of California. */ /* All rights reserved. */
/* This code is derived from software contributed to Berkeley by */ /* Vern Paxson. */
/* The United States Government has rights in this work pursuant */ /* to contract no. DE-AC03-76SF00098 between the United States */ /* Department of Energy and the University of California. */
/* This file is part of flex. */
/* Redistribution and use in source and binary forms, with or without */ /* modification, are permitted provided that the following conditions */ /* are met: */
/* 1. Redistributions of source code must retain the above copyright */ /* notice, this list of conditions and the following disclaimer. */ /* 2. 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 the University 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR */ /* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */ /* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */ /* PURPOSE. */
#ifndef SCANOPT_H #define SCANOPT_H
#include"flexdef.h"
#ifndef NO_SCANOPT_USAGE /* Used by scanopt_usage for pretty-printing. */ #ifdef HAVE_NCURSES_H #include <ncurses.h> #endif #endif
#ifdef __cplusplus extern"C" { #endif #ifndef PROTO #define PROTO(args) args #endif /* Error codes. */ enum scanopt_err_t {
SCANOPT_ERR_OPT_UNRECOGNIZED = -1, /* Unrecognized option. */
SCANOPT_ERR_OPT_AMBIGUOUS = -2, /* It matched more than one option name. */
SCANOPT_ERR_ARG_NOT_FOUND = -3, /* The required arg was not found. */
SCANOPT_ERR_ARG_NOT_ALLOWED = -4/* Option does not take an argument. */
};
/* flags passed to scanopt_init */ enum scanopt_flag_t {
SCANOPT_NO_ERR_MSG = 0x01 /* Suppress printing to stderr. */
};
/* Specification for a single option. */ struct optspec_t { constchar *opt_fmt; /* e.g., "--foo=FILE", "-f FILE", "-n [NUM]" */ int r_val; /* Value to be returned by scanopt_ex(). */ constchar *desc; /* Brief description of this option, or NULL. */
}; typedefstruct optspec_t optspec_t;
/* Used internally by scanopt() to maintain state. */ /* Never modify these value directly. */ typedefvoid *scanopt_t;
/* Initializes scanner and checks option list for errors. *Parameters: *options-Arrayofoptions. *argc-Sameaspassedtomain(). *argv-Sameaspassedtomain().Firstelementisskipped. *flags-Controlbehavior. *Return:Amalloc'dpointer.
*/
scanopt_t *scanopt_init PROTO ((const optspec_t * options, int argc, char **argv, int flags));
/* Frees memory used by scanner.
* Always returns 0. */ int scanopt_destroy PROTO ((scanopt_t * scanner));
#ifndef NO_SCANOPT_USAGE /* Prints a usage message based on contents of optlist. *Parameters: *scanner-Thescanner,alreadyinitializedwithscanopt_init(). *fp-Thefilestreamtowriteto. *usage-Texttobeprependedtooptionlist.MaybeNULL. *Return:Alwaysreturns0(zero).
*/ int scanopt_usage
PROTO (
(scanopt_t * scanner, FILE * fp, constchar *usage)); #endif
/* Scans command-line options in argv[]. *Parameters: *scanner-Thescanner,alreadyinitializedwithscanopt_init(). *optarg-Returnargument,maybeNULL. *Onsuccess,itpointstostartofanargument. *optindex-Returnargument,maybeNULL. *Onsuccessorfailure,itistheindexofthisoption. *Ifreturniszero,thenoptindexistheNEXTvalidoptionindex. * *Return:>0onsuccess.Returnvalueisfromoptspec_t->rval. *==0ifatendofoptions. *<0onerror(returnvalueisanerrorcode). *
*/ int scanopt
PROTO (
(scanopt_t * scanner, char **optarg, int *optindex));
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