96846ff646
o main returns int not void o use return 0 at end of main when needed o use braces to avoid potentially ambiguous else o don't default to type int o #ifdef 0 -> #if 0 Reviewed by: obrien and chuckr
232 lines
6.6 KiB
C
232 lines
6.6 KiB
C
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/***********************************************************
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Copyright 1990, by Alfalfa Software Incorporated, Cambridge, Massachusetts.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that Alfalfa's name not be used in
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advertising or publicity pertaining to distribution of the software
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without specific, written prior permission.
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ALPHALPHA DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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ALPHALPHA BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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If you make any modifications, bugfixes or other changes to this software
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we'd appreciate it if you could send a copy to us so we can keep things
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up-to-date. Many thanks.
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Kee Hinckley
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Alfalfa Software, Inc.
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267 Allston St., #3
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Cambridge, MA 02139 USA
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nazgul@alfalfa.com
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******************************************************************/
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/* Edit History
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01/18/91 3 hamilton #if not reparsed
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01/12/91 2 schulert conditionally use prototypes
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12/23/90 2 hamilton Fix fd == NULL to fd < 0
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11/03/90 1 hamilton Alphalpha->Alfalfa & OmegaMail->Poste
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08/13/90 1 schulert move from ua to omu
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*/
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#include <err.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <unistd.h>
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#ifdef SYSV
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#include <sys/fcntl.h>
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#define L_SET SEEK_SET
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#define L_INCR SEEK_CUR
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#endif
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#include <sys/file.h>
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#include <sys/stat.h>
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#include "gencat.h"
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/*
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* The spec says the syntax is "gencat catfile msgfile...".
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* We extend it to:
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* gencat [-lang C|C++|ANSIC] catfile msgfile [-h <header-file>]...
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* Flags are order dependant, we'll take whatever lang was most recently chosen
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* and use it to generate the next header file. The header files are generated
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* at the point in the command line they are listed. Thus the sequence:
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* gencat -lang C foo.cat foo.mcs -h foo.h -lang C++ bar.mcs -h bar.H
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* will put constants from foo.mcs into foo.h and constants from bar.mcs into
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* bar.h. Constants are not saved in the catalog file, so nothing will come
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* from that, even if things have been defined before. The constants in foo.h
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* will be in C syntax, in bar.H in C++ syntax.
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*/
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#if ANSI_C || defined(__cplusplus)
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# define P_(x) x
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#else
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# define P_(x) /**/
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#endif
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static void writeIfChanged P_((char *fname, int lang, int orConsts));
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#undef P_
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static void
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usage()
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{
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fprintf(stderr, "usage: gencat [-new] [-or] [-lang C|C++|ANSIC]\n");
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fprintf(stderr, " catfile msgfile [-h <header-file>]...\n");
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exit(1);
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}
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int main(
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#if ANSI_C || defined(__cplusplus)
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int argc, char *argv[])
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#else
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argc, argv)
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int argc;
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char *argv[];
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#endif
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{
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int ofd, ifd, i;
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char *catfile = NULL;
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char *input = NULL;
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int lang = MCLangC;
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int new = False;
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int orConsts = False;
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for (i = 1; i < argc; ++i) {
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if (argv[i][0] == '-') {
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if (strcmp(argv[i], "-lang") == 0) {
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++i;
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if (strcmp(argv[i], "C") == 0) lang = MCLangC;
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else if (strcmp(argv[i], "C++") == 0) lang = MCLangCPlusPlus;
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else if (strcmp(argv[i], "ANSIC") == 0) lang = MCLangANSIC;
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else {
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errx(1, "unrecognized language: %s", argv[i]);
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}
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} else if (strcmp(argv[i], "-h") == 0) {
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if (!input)
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errx(1, "can't write to a header before reading something");
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++i;
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writeIfChanged(argv[i], lang, orConsts);
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} else if (strcmp(argv[i], "-new") == 0) {
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if (catfile)
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errx(1, "you must specify -new before the catalog file name");
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new = True;
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} else if (strcmp(argv[i], "-or") == 0) {
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orConsts = ~orConsts;
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} else {
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usage();
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}
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} else {
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if (!catfile) {
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catfile = argv[i];
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if (new) {
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if ((ofd = open(catfile, O_WRONLY|O_TRUNC|O_CREAT, 0666)) < 0)
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errx(1, "unable to create a new %s", catfile);
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} else if ((ofd = open(catfile, O_RDONLY)) < 0) {
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if ((ofd = open(catfile, O_WRONLY|O_CREAT, 0666)) < 0)
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errx(1, "unable to create %s", catfile);
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} else {
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MCReadCat(ofd);
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close(ofd);
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if ((ofd = open(catfile, O_WRONLY|O_TRUNC)) < 0)
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errx(1, "unable to truncate %s", catfile);
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}
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} else {
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input = argv[i];
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if ((ifd = open(input, O_RDONLY)) < 0)
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errx(1, "unable to read %s", input);
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MCParse(ifd);
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close(ifd);
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}
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}
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}
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if (catfile) {
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MCWriteCat(ofd);
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exit(0);
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} else {
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usage();
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}
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return 0;
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}
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static void writeIfChanged(
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#if ANSI_C || defined(__cplusplus)
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char *fname, int lang, int orConsts)
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#else
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fname, lang, orConsts)
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char *fname;
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int lang;
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int orConsts;
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#endif
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{
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char tmpname[32];
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char buf[BUFSIZ], tbuf[BUFSIZ], *cptr, *tptr;
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int fd, tfd;
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int diff = False;
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int len, tlen;
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struct stat sbuf;
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/* If it doesn't exist, just create it */
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if (stat(fname, &sbuf)) {
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if ((fd = open(fname, O_WRONLY|O_CREAT, 0666)) < 0)
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errx(1, "unable to create header file %s", fname);
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MCWriteConst(fd, lang, orConsts);
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close(fd);
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return;
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}
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/* If it does exist, create a temp file for now */
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sprintf(tmpname, "/tmp/gencat.%d", (int) getpid());
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if ((tfd = open(tmpname, O_RDWR|O_CREAT, 0666)) < 0)
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errx(1, "unable to open temporary file: %s", tmpname);
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unlink(tmpname);
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/* Write to the temp file and rewind */
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MCWriteConst(tfd, lang, orConsts);
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/* Open the real header file */
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if ((fd = open(fname, O_RDONLY)) < 0)
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errx(1, "unable to read header file: %s", fname);
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/* Backup to the start of the temp file */
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if (lseek(tfd, 0L, L_SET) < 0)
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errx(1, "unable to seek in tempfile: %s", tmpname);
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/* Now compare them */
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while ((tlen = read(tfd, tbuf, BUFSIZ)) > 0) {
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if ((len = read(fd, buf, BUFSIZ)) != tlen) {
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diff = True;
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goto done;
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}
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for (cptr = buf, tptr = tbuf; cptr < buf+len; ++cptr, ++tptr) {
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if (*tptr != *cptr) {
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diff = True;
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goto done;
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}
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}
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}
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done:
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if (diff) {
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if (lseek(tfd, 0L, L_SET) < 0)
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errx(1, "unable to seek in tempfile: %s", tmpname);
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close(fd);
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if ((fd = open(fname, O_WRONLY|O_TRUNC)) < 0)
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errx(1, "unable to truncate header file: %s", fname);
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while ((len = read(tfd, buf, BUFSIZ)) > 0) {
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if (write(fd, buf, len) != len)
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warnx("error writing to header file: %s", fname);
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}
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}
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close(fd);
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close(tfd);
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}
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