1 /*********************************************************** 2 Copyright 1990, by Alfalfa Software Incorporated, Cambridge, Massachusetts. 3 4 All Rights Reserved 5 6 Permission to use, copy, modify, and distribute this software and its 7 documentation for any purpose and without fee is hereby granted, 8 provided that the above copyright notice appear in all copies and that 9 both that copyright notice and this permission notice appear in 10 supporting documentation, and that Alfalfa's name not be used in 11 advertising or publicity pertaining to distribution of the software 12 without specific, written prior permission. 13 14 ALPHALPHA DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 15 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL 16 ALPHALPHA BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR 17 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 18 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 19 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 20 SOFTWARE. 21 22 If you make any modifications, bugfixes or other changes to this software 23 we'd appreciate it if you could send a copy to us so we can keep things 24 up-to-date. Many thanks. 25 Kee Hinckley 26 Alfalfa Software, Inc. 27 267 Allston St., #3 28 Cambridge, MA 02139 USA 29 nazgul@alfalfa.com 30 31 ******************************************************************/ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <sys/file.h> 37 #include <sys/stat.h> 38 #include <err.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 #include "gencat.h" 44 45 /* 46 * The spec says the syntax is "gencat catfile msgfile...". 47 * We extend it to: 48 * gencat [-lang C|C++|ANSIC] catfile msgfile [-h <header-file>]... 49 * Flags are order dependent, we'll take whatever lang was most recently chosen 50 * and use it to generate the next header file. The header files are generated 51 * at the point in the command line they are listed. Thus the sequence: 52 * gencat -lang C foo.cat foo.mcs -h foo.h -lang C++ bar.mcs -h bar.H 53 * will put constants from foo.mcs into foo.h and constants from bar.mcs into 54 * bar.h. Constants are not saved in the catalog file, so nothing will come 55 * from that, even if things have been defined before. The constants in foo.h 56 * will be in C syntax, in bar.H in C++ syntax. 57 */ 58 59 static void writeIfChanged(char *, int, int); 60 61 static void 62 usage(void) 63 { 64 fprintf(stderr, "usage: gencat [-new] [-or] [-lang C|C++|ANSIC]\n" 65 " catfile msgfile [-h <header-file>]...\n"); 66 exit(1); 67 } 68 69 int 70 main(int argc, char *argv[]) 71 { 72 int ofd, ifd, i; 73 char *catfile = NULL; 74 char *input = NULL; 75 int lang = MCLangC; 76 int new = FALSE; 77 int orConsts = FALSE; 78 79 for (i = 1; i < argc; ++i) { 80 if (argv[i][0] == '-') { 81 if (strcmp(argv[i], "-lang") == 0) { 82 ++i; 83 if (strcmp(argv[i], "C") == 0) lang = MCLangC; 84 else if (strcmp(argv[i], "C++") == 0) lang = MCLangCPlusPlus; 85 else if (strcmp(argv[i], "ANSIC") == 0) lang = MCLangANSIC; 86 else { 87 errx(1, "unrecognized language: %s", argv[i]); 88 } 89 } else if (strcmp(argv[i], "-h") == 0) { 90 if (!input) 91 errx(1, "can't write to a header before reading something"); 92 ++i; 93 writeIfChanged(argv[i], lang, orConsts); 94 } else if (strcmp(argv[i], "-new") == 0) { 95 if (catfile) 96 errx(1, "you must specify -new before the catalog file name"); 97 new = TRUE; 98 } else if (strcmp(argv[i], "-or") == 0) { 99 orConsts = ~orConsts; 100 } else { 101 usage(); 102 } 103 } else { 104 if (!catfile) { 105 catfile = argv[i]; 106 if (new) { 107 if ((ofd = open(catfile, O_WRONLY|O_TRUNC|O_CREAT, 0666)) < 0) 108 errx(1, "unable to create a new %s", catfile); 109 } else if ((ofd = open(catfile, O_RDONLY)) < 0) { 110 if ((ofd = open(catfile, O_WRONLY|O_CREAT, 0666)) < 0) 111 errx(1, "unable to create %s", catfile); 112 } else { 113 MCReadCat(ofd); 114 close(ofd); 115 if ((ofd = open(catfile, O_WRONLY|O_TRUNC)) < 0) 116 errx(1, "unable to truncate %s", catfile); 117 } 118 } else { 119 input = argv[i]; 120 if ((ifd = open(input, O_RDONLY)) < 0) 121 errx(1, "unable to read %s", input); 122 MCParse(ifd); 123 close(ifd); 124 } 125 } 126 } 127 if (catfile) { 128 MCWriteCat(ofd); 129 exit(0); 130 } else { 131 usage(); 132 } 133 return 0; 134 } 135 136 static void 137 writeIfChanged(char *fname, int lang, int orConsts) 138 { 139 char tmpname[32]; 140 char buf[BUFSIZ], tbuf[BUFSIZ], *cptr, *tptr; 141 int fd, tfd; 142 int diff = FALSE; 143 int len, tlen; 144 struct stat sbuf; 145 146 /* If it doesn't exist, just create it */ 147 if (stat(fname, &sbuf)) { 148 if ((fd = open(fname, O_WRONLY|O_CREAT, 0666)) < 0) 149 errx(1, "unable to create header file %s", fname); 150 MCWriteConst(fd, lang, orConsts); 151 close(fd); 152 return; 153 } 154 155 /* If it does exist, create a temp file for now */ 156 sprintf(tmpname, "/tmp/gencat.%d", (int) getpid()); 157 if ((tfd = open(tmpname, O_RDWR|O_CREAT, 0666)) < 0) 158 errx(1, "unable to open temporary file: %s", tmpname); 159 unlink(tmpname); 160 161 /* Write to the temp file and rewind */ 162 MCWriteConst(tfd, lang, orConsts); 163 164 /* Open the real header file */ 165 if ((fd = open(fname, O_RDONLY)) < 0) 166 errx(1, "unable to read header file: %s", fname); 167 168 /* Backup to the start of the temp file */ 169 if (lseek(tfd, (off_t)0, L_SET) < 0) 170 errx(1, "unable to seek in tempfile: %s", tmpname); 171 172 /* Now compare them */ 173 while ((tlen = read(tfd, tbuf, BUFSIZ)) > 0) { 174 if ((len = read(fd, buf, BUFSIZ)) != tlen) { 175 diff = TRUE; 176 goto done; 177 } 178 for (cptr = buf, tptr = tbuf; cptr < buf+len; ++cptr, ++tptr) { 179 if (*tptr != *cptr) { 180 diff = TRUE; 181 goto done; 182 } 183 } 184 } 185 done: 186 if (diff) { 187 if (lseek(tfd, (off_t)0, L_SET) < 0) 188 errx(1, "unable to seek in tempfile: %s", tmpname); 189 close(fd); 190 if ((fd = open(fname, O_WRONLY|O_TRUNC)) < 0) 191 errx(1, "unable to truncate header file: %s", fname); 192 while ((len = read(tfd, buf, BUFSIZ)) > 0) { 193 if (write(fd, buf, (size_t)len) != len) 194 warnx("error writing to header file: %s", fname); 195 } 196 } 197 close(fd); 198 close(tfd); 199 } 200