drawmap/trunk/unblock_dlg.c

/*
 * =========================================================================
 * unblock_dlg - A program to add newlines to an optional-format USGS DLG file.
 * Copyright (c) 1997,2000  Fred M. Erickson
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 * =========================================================================
 *
 * This program unblocks the information in an optional-format DLG file
 * by adding a newline to each record.
 * It sets the last byte in each record (which should always be
 * a blank) to a newline.
 *
 * The program reads from stdin and writes to stdout.
 */
#include <stdio.h>
#include <sys/types.h>
#include "drawmap.h"
#include "dlg.h"

void
license(void)
{
        fprintf(stderr, "This program is free software; you can redistribute it and/or modify\n");
        fprintf(stderr, "it under the terms of the GNU General Public License as published by\n");
        fprintf(stderr, "the Free Software Foundation; either version 2, or (at your option)\n");
        fprintf(stderr, "any later version.\n\n");

        fprintf(stderr, "This program is distributed in the hope that it will be useful,\n");
        fprintf(stderr, "but WITHOUT ANY WARRANTY; without even the implied warranty of\n");
        fprintf(stderr, "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n");
        fprintf(stderr, "GNU General Public License for more details.\n\n");

        fprintf(stderr, "You should have received a copy of the GNU General Public License\n");
        fprintf(stderr, "along with this program; if not, write to the Free Software\n");
        fprintf(stderr, "Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.\n");
}

main(int argc, char *argv[])
{
        unsigned char buf[DLG_RECORD_LENGTH];
        int start_flag = 0;
        int ret_val;
        int i;

        if ((argc == 2) && (argv[1][0] == '-') && (argv[1][1] == 'L'))  {
                license();
                exit(0);
        }
        else if (argc != 1)  {
                fprintf(stderr, "Usage:  %s < optional_format_dlg_file.opt\n", argv[0]);
                exit(0);
        }

        while ((ret_val = read(0, buf, DLG_RECORD_LENGTH)) == DLG_RECORD_LENGTH)  {
                if (start_flag == 0)  {
                        /*
                         * Check for newlines in the first read
                         * to try to prevent people from converting files
                         * that already have newlines in them.
                         */
                        for (i = 0; i < DLG_RECORD_LENGTH; i++)  {
                                if (buf[i] == '\n')  {
                                        fprintf(stderr, "This file already has newlines in it.  Aborting.\n");
                                        exit(0);
                                }
                        }
                        start_flag = 1;
                }
//              if (buf[DLG_RECORD_LENGTH - 1] != ' ')  {
//                      /*
//                       * According to the standard, bytes 73-80 of each record are
//                       * either blank (which seems to usually be the case) or can
//                       * contain a record sequence number.  This if-block assumes
//                       * that there is always a blank in byte 80, and checks for
//                       * record sanity based on that assumption.  Of course, the
//                       * check will erroneously fail if there is a record sequence
//                       * number.
//                       */
//                      fprintf(stderr, "This file may have formatting problems.  Aborting.\n");
//                      exit(0);
//              }
                buf[DLG_RECORD_LENGTH - 1] = '\n';
                write(1, buf, ret_val);
        }

        if ((ret_val != 0) && (ret_val != DLG_RECORD_LENGTH))  {
                fprintf(stderr, "read() returned %d\n", ret_val);
                exit(0);
        }
}
1	/*
2	* =========================================================================
3	* unblock_dlg - A program to add newlines to an optional-format USGS DLG file.
4	* Copyright (c) 1997,2000 Fred M. Erickson
5	*
6	* This program is free software; you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation; either version 2, or (at your option)
9	* any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19	* =========================================================================
20	*
21	* This program unblocks the information in an optional-format DLG file
22	* by adding a newline to each record.
23	* It sets the last byte in each record (which should always be
24	* a blank) to a newline.
25	*
26	* The program reads from stdin and writes to stdout.
27	*/
28	#include <stdio.h>
29	#include <sys/types.h>
30	#include "drawmap.h"
31	#include "dlg.h"
32
33	void
34	license(void)
35	{
36	fprintf(stderr, "This program is free software; you can redistribute it and/or modify\n");
37	fprintf(stderr, "it under the terms of the GNU General Public License as published by\n");
38	fprintf(stderr, "the Free Software Foundation; either version 2, or (at your option)\n");
39	fprintf(stderr, "any later version.\n\n");
40
41	fprintf(stderr, "This program is distributed in the hope that it will be useful,\n");
42	fprintf(stderr, "but WITHOUT ANY WARRANTY; without even the implied warranty of\n");
43	fprintf(stderr, "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n");
44	fprintf(stderr, "GNU General Public License for more details.\n\n");
45
46	fprintf(stderr, "You should have received a copy of the GNU General Public License\n");
47	fprintf(stderr, "along with this program; if not, write to the Free Software\n");
48	fprintf(stderr, "Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.\n");
49	}
50
51	main(int argc, char *argv[])
52	{
53	unsigned char buf[DLG_RECORD_LENGTH];
54	int start_flag = 0;
55	int ret_val;
56	int i;
57
58	if ((argc == 2) && (argv[1][0] == '-') && (argv[1][1] == 'L')) {
59	license();
60	exit(0);
61	}
62	else if (argc != 1) {
63	fprintf(stderr, "Usage: %s < optional_format_dlg_file.opt\n", argv[0]);
64	exit(0);
65	}
66
67	while ((ret_val = read(0, buf, DLG_RECORD_LENGTH)) == DLG_RECORD_LENGTH) {
68	if (start_flag == 0) {
69	/*
70	* Check for newlines in the first read
71	* to try to prevent people from converting files
72	* that already have newlines in them.
73	*/
74	for (i = 0; i < DLG_RECORD_LENGTH; i++) {
75	if (buf[i] == '\n') {
76	fprintf(stderr, "This file already has newlines in it. Aborting.\n");
77	exit(0);
78	}
79	}
80	start_flag = 1;
81	}
82	// if (buf[DLG_RECORD_LENGTH - 1] != ' ') {
83	// /*
84	// * According to the standard, bytes 73-80 of each record are
85	// * either blank (which seems to usually be the case) or can
86	// * contain a record sequence number. This if-block assumes
87	// * that there is always a blank in byte 80, and checks for
88	// * record sanity based on that assumption. Of course, the
89	// * check will erroneously fail if there is a record sequence
90	// * number.
91	// */
92	// fprintf(stderr, "This file may have formatting problems. Aborting.\n");
93	// exit(0);
94	// }
95	buf[DLG_RECORD_LENGTH - 1] = '\n';
96	write(1, buf, ret_val);
97	}
98
99	if ((ret_val != 0) && (ret_val != DLG_RECORD_LENGTH)) {
100	fprintf(stderr, "read() returned %d\n", ret_val);
101	exit(0);
102	}
103	}