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Annotation of mandoc/man_argv.c, Revision 1.1

1.1     ! kristaps    1: /*     $Id: mdoc_argv.c,v 1.21 2009/07/20 14:12:27 kristaps Exp $ */
        !             2: /*
        !             3:  * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
        !             4:  *
        !             5:  * Permission to use, copy, modify, and distribute this software for any
        !             6:  * purpose with or without fee is hereby granted, provided that the above
        !             7:  * copyright notice and this permission notice appear in all copies.
        !             8:  *
        !             9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !            10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
        !            14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
        !            15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            16:  */
        !            17: #include <sys/types.h>
        !            18:
        !            19: #include <assert.h>
        !            20: #include <stdlib.h>
        !            21: #include <string.h>
        !            22:
        !            23: #include "libman.h"
        !            24:
        !            25:
        !            26: int
        !            27: man_args(struct man *m, int line, int *pos, char *buf, char **v)
        !            28: {
        !            29:
        !            30:        assert(*pos);
        !            31:        assert(' ' != buf[*pos]);
        !            32:
        !            33:        if (0 == buf[*pos])
        !            34:                return(ARGS_EOLN);
        !            35:
        !            36:        *v = &buf[*pos];
        !            37:
        !            38:        /*
        !            39:         * Process a quoted literal.  A quote begins with a double-quote
        !            40:         * and ends with a double-quote NOT preceded by a double-quote.
        !            41:         * Whitespace is NOT involved in literal termination.
        !            42:         */
        !            43:
        !            44:        if ('\"' == buf[*pos]) {
        !            45:                *v = &buf[++(*pos)];
        !            46:
        !            47:                for ( ; buf[*pos]; (*pos)++) {
        !            48:                        if ('\"' != buf[*pos])
        !            49:                                continue;
        !            50:                        if ('\"' != buf[*pos + 1])
        !            51:                                break;
        !            52:                        (*pos)++;
        !            53:                }
        !            54:
        !            55:                if (0 == buf[*pos]) {
        !            56:                        if ( ! man_pwarn(m, line, *pos, WTQUOTE))
        !            57:                                return(ARGS_ERROR);
        !            58:                        return(ARGS_QWORD);
        !            59:                }
        !            60:
        !            61:                buf[(*pos)++] = 0;
        !            62:
        !            63:                if (0 == buf[*pos])
        !            64:                        return(ARGS_QWORD);
        !            65:
        !            66:                while (' ' == buf[*pos])
        !            67:                        (*pos)++;
        !            68:
        !            69:                if (0 == buf[*pos])
        !            70:                        if ( ! man_pwarn(m, line, *pos, WTSPACE))
        !            71:                                return(ARGS_ERROR);
        !            72:
        !            73:                return(ARGS_QWORD);
        !            74:        }
        !            75:
        !            76:        /*
        !            77:         * A non-quoted term progresses until either the end of line or
        !            78:         * a non-escaped whitespace.
        !            79:         */
        !            80:
        !            81:        for ( ; buf[*pos]; (*pos)++)
        !            82:                if (' ' == buf[*pos] && '\\' != buf[*pos - 1])
        !            83:                        break;
        !            84:
        !            85:        if (0 == buf[*pos])
        !            86:                return(ARGS_WORD);
        !            87:
        !            88:        buf[(*pos)++] = 0;
        !            89:
        !            90:        while (' ' == buf[*pos])
        !            91:                (*pos)++;
        !            92:
        !            93:        if (0 == buf[*pos])
        !            94:                if ( ! man_pwarn(m, line, *pos, WTSPACE))
        !            95:                        return(ARGS_ERROR);
        !            96:
        !            97:        return(ARGS_WORD);
        !            98: }
        !            99: