| [3031] | 1 | /* flex - tool to generate fast lexical analyzers */
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| 2 |
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| 3 | /* Copyright (c) 1990 The Regents of the University of California. */
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| 4 | /* All rights reserved. */
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| 5 |
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| 6 | /* This code is derived from software contributed to Berkeley by */
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| 7 | /* Vern Paxson. */
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| 8 |
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| 9 | /* The United States Government has rights in this work pursuant */
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| 10 | /* to contract no. DE-AC03-76SF00098 between the United States */
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| 11 | /* Department of Energy and the University of California. */
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| 12 |
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| 13 | /* This file is part of flex. */
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| 14 |
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| 15 | /* Redistribution and use in source and binary forms, with or without */
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| 16 | /* modification, are permitted provided that the following conditions */
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| 17 | /* are met: */
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| 18 |
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| 19 | /* 1. Redistributions of source code must retain the above copyright */
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| 20 | /* notice, this list of conditions and the following disclaimer. */
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| 21 | /* 2. Redistributions in binary form must reproduce the above copyright */
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| 22 | /* notice, this list of conditions and the following disclaimer in the */
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| 23 | /* documentation and/or other materials provided with the distribution. */
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| 24 |
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| 25 | /* Neither the name of the University nor the names of its contributors */
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| 26 | /* may be used to endorse or promote products derived from this software */
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| 27 | /* without specific prior written permission. */
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| 28 |
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| 29 | /* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR */
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| 30 | /* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */
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| 31 | /* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */
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| 32 | /* PURPOSE. */
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| 33 | |
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| 34 |
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| 35 | #ifndef SCANOPT_H
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| 36 | #define SCANOPT_H
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| 37 |
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| 38 | #include "flexdef.h"
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| 39 |
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| 40 |
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| 41 | #ifndef NO_SCANOPT_USAGE
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| 42 | /* Used by scanopt_usage for pretty-printing. */
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| 43 | #ifdef HAVE_NCURSES_H
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| 44 | #include <ncurses.h>
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| 45 | #endif
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| 46 | #endif
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| 47 |
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| 48 | #ifdef __cplusplus
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| 49 | extern "C" {
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| 50 | #endif
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| 51 | #ifndef PROTO
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| 52 | #define PROTO(args) args
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| 53 | #endif
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| 54 | /* Error codes. */ enum scanopt_err_t {
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| 55 | SCANOPT_ERR_OPT_UNRECOGNIZED = -1, /* Unrecognized option. */
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| 56 | SCANOPT_ERR_OPT_AMBIGUOUS = -2, /* It matched more than one option name. */
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| 57 | SCANOPT_ERR_ARG_NOT_FOUND = -3, /* The required arg was not found. */
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| 58 | SCANOPT_ERR_ARG_NOT_ALLOWED = -4 /* Option does not take an argument. */
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| 59 | };
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| 60 |
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| 61 |
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| 62 | /* flags passed to scanopt_init */
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| 63 | enum scanopt_flag_t {
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| 64 | SCANOPT_NO_ERR_MSG = 0x01 /* Suppress printing to stderr. */
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| 65 | };
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| 66 |
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| 67 | /* Specification for a single option. */
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| 68 | struct optspec_t {
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| 69 | const char *opt_fmt; /* e.g., "--foo=FILE", "-f FILE", "-n [NUM]" */
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| 70 | int r_val; /* Value to be returned by scanopt_ex(). */
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| 71 | const char *desc; /* Brief description of this option, or NULL. */
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| 72 | };
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| 73 | typedef struct optspec_t optspec_t;
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| 74 |
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| 75 |
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| 76 | /* Used internally by scanopt() to maintain state. */
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| 77 | /* Never modify these value directly. */
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| 78 | typedef void *scanopt_t;
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| 79 | |
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| 80 |
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| 81 |
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| 82 | /* Initializes scanner and checks option list for errors.
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| 83 | * Parameters:
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| 84 | * options - Array of options.
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| 85 | * argc - Same as passed to main().
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| 86 | * argv - Same as passed to main(). First element is skipped.
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| 87 | * flags - Control behavior.
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| 88 | * Return: A malloc'd pointer .
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| 89 | */
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| 90 | scanopt_t *scanopt_init PROTO ((const optspec_t * options,
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| 91 | int argc, char **argv, int flags));
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| 92 |
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| 93 | /* Frees memory used by scanner.
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| 94 | * Always returns 0. */
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| 95 | int scanopt_destroy PROTO ((scanopt_t * scanner));
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| 96 |
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| 97 | #ifndef NO_SCANOPT_USAGE
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| 98 | /* Prints a usage message based on contents of optlist.
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| 99 | * Parameters:
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| 100 | * scanner - The scanner, already initialized with scanopt_init().
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| 101 | * fp - The file stream to write to.
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| 102 | * usage - Text to be prepended to option list. May be NULL.
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| 103 | * Return: Always returns 0 (zero).
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| 104 | */
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| 105 | int scanopt_usage
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| 106 | PROTO (
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| 107 | (scanopt_t * scanner, FILE * fp,
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| 108 | const char *usage));
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| 109 | #endif
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| 110 |
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| 111 | /* Scans command-line options in argv[].
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| 112 | * Parameters:
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| 113 | * scanner - The scanner, already initialized with scanopt_init().
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| 114 | * optarg - Return argument, may be NULL.
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| 115 | * On success, it points to start of an argument.
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| 116 | * optindex - Return argument, may be NULL.
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| 117 | * On success or failure, it is the index of this option.
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| 118 | * If return is zero, then optindex is the NEXT valid option index.
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| 119 | *
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| 120 | * Return: > 0 on success. Return value is from optspec_t->rval.
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| 121 | * == 0 if at end of options.
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| 122 | * < 0 on error (return value is an error code).
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| 123 | *
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| 124 | */
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| 125 | int scanopt
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| 126 | PROTO (
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| 127 | (scanopt_t * scanner, char **optarg,
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| 128 | int *optindex));
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| 129 |
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| 130 | #ifdef __cplusplus
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| 131 | }
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| 132 | #endif
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| 133 | #endif
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| 134 | /* vim:set tabstop=8 softtabstop=4 shiftwidth=4: */
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