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https://github.com/GnoConsortium/gno.git
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51b2bbcf92
Increased the number of characters in the name field of the nameEntry struct from 34 to 36. This gives an 8-byte alignment to the offset entry, which provides binary compatibility of the precompiled database file between the IIgs and little-endian 32-bit machines such as Linux boxes. *** THIS MEANS THAT THE PRECOMPILED DATABASE IS NO LONGER BINARY COMPATIBLE WITH EARLIER VERSIONS. Updated descu so that the "Last Updated" line in the describe source "header" is updated to reflect the current date and time (GMT, if supported). Fixed a bug in descu that caused the "header" to be slowly eaten, one character at a time. The describe database source file is no longer part of this archive. It is available separately from the url, above. Added a "Known Bugs" section and URLs on where to find the online database to this README. Modified the installation instructions a bit.
325 lines
10 KiB
C
325 lines
10 KiB
C
/* */
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/* descc - compile info file into describe database file */
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/* */
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/* $Id: descc.c,v 1.6 1998/01/17 07:20:07 gdr Exp $ */
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/* */
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/* v1.0.5 and later - see the README file for a list of changes. */
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/* */
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/* v1.0.4 - Changed location of database. Describe is now */
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/* part of the base GNO distribution. Version numbers */
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/* now in lockstep. */
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/* Devin Reade [Mon 22 Sep 1997] */
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/* */
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/* v1.0.3 - No changes, but changed version number to keep */
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/* in line with descu. */
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/* Soenke Behrens [Sun Jan 28 1996] */
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/* */
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/* v1.0.2 - One bug removed. Recompiled to accomodate new */
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/* SHELL line and DESCDB environment var */
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/* Soenke Behrens [Sun Oct 22 1995] */
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/* */
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/* v1.0.1 - Added -h and -V flags [Sat May 06 1995] */
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/* Extracted certain #defines to "desc.h" */
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/* Now uses getopt for command line parsing. */
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/* Fixed some potential bugs. */
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/* */
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/* v1.0.0 - James Brookes [Sat Oct 23 1993] */
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/* released [Thu Mar 31 1994] [!!!!!!!!!!!] */
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/* */
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/* This version implements the following features: */
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/* */
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/* o Compiles a text file which follows the specifications in the */
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/* included file 'describe.format'. The format of the describe */
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/* database is as follows: */
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/* */
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/* Header */
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/* */
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/* 2 bytes: Short Int, number of Name Entries */
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/* */
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/* Name Entries */
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/* */
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/* 36 bytes: Null-terminated string; name of utility */
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/* 4 bytes: Long Int, offset of record in file. */
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/* */
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/* Records */
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/* */
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/* 8 variable-length Null-terminated strings. */
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/* */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#ifdef __GNO__
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#include <types.h>
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#include <gsos.h>
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#include <gno/gno.h>
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#endif
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#include "desc.h"
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/* prototypes */
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void usage(char *callname);
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void version(char *callname);
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void puke(int error,int lines);
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int mygets(char *buffer, int2 *lines, FILE *FInPtr);
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int Vflag;
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/* version - print it out */
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void version (char *callname) {
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Vflag++;
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fprintf(stderr,"%s version %s\n",callname,_VERSION_);
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return;
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}
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/* */
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/* usage - you know what to do */
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/* */
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void usage (char *callname) {
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if (!Vflag) version(callname);
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fprintf(stderr,"usage: %s [-hV] <describe_sourcefile>\n",callname);
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exit(-1);
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}
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/* */
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/* puke - stdlib errors */
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/* */
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void puke (int error,int lines) {
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fprintf(stderr,"\nError $%x in line %d of script\n",error,lines);
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fflush(stdout);
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exit(error);
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}
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/* */
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/* mygets - get a line (skipping commented lines) and increment line count */
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/* */
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int mygets (char *buffer, int2 *lines, FILE *FInPtr) {
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char *p, c;
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do {
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if (fgets(buffer,MAX_LINE_LENGTH,FInPtr)==NULL) {
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return(-1);
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}
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p = buffer + strlen(buffer) - 1; /* remove trailing \n */
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if (*p == '\n') {
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*p = '\0';
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} else {
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fprintf(stderr,"Line %d exceeds %d characters. Remainder ignored.\n",
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*lines,MAX_LINE_LENGTH-1);
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do {
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c = fgetc(FInPtr);
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} while ((c!='\n') && !feof(FInPtr));
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}
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(*lines)++;
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} while(buffer[0] == QUOTE_CHAR || buffer[0] == '\n');
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return(0);
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}
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#ifdef __GNO__
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#define BIN 0x06
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/*
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* Change the file type of <path> to BINary
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*/
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void
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changeToBin(const char *path) {
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FileInfoRecGS pblock;
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pblock.pCount = 4;
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if ((pblock.pathname = (GSString255Ptr) __C2GSMALLOC(path)) == NULL) {
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/* silent failure */
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return;
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}
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GetFileInfoGS(&pblock);
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if (_toolErr == 0) {
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if (pblock.fileType != BIN) {
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pblock.fileType = BIN;
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pblock.auxType = 0L;
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SetFileInfoGS(&pblock);
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}
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}
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GIfree((GSStringPtr) pblock.pathname);
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return;
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}
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#endif /* __GNO__ */
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/* */
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/* Mainline */
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/* */
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int main (int argc, char **argv) {
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FILE *FInPtr, *FOutPtr;
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long int *record_locs, currLoc, endOfFile;
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char *buffer;
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int2 lines, namecount, i, j;
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nameEntry nameStruct;
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int c, errflag;
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char *db_path;
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/* initialize globals */
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Vflag=0;
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errflag=0;
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#ifdef __STACK_CHECK__
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_beginStackCheck();
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#endif
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assert(sizeof(int2)==2);
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assert(sizeof(int4)==4);
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/* Get database path: If DESCDB is set, use it,
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otherwise use DATABASE */
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if (getenv("DESCDB") == 0)
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{
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if ((db_path = strdup(DATABASE)) == 0)
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{
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fprintf(stderr,"couldn't allocate path variable\n");
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exit (-1);
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}
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} else {
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if ((db_path = strdup(getenv("DESCDB"))) == 0)
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{
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fprintf(stderr,"couldn't allocate path variable\n");
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exit (-1);
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}
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}
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/* parse command line */
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while ((c = getopt(argc, argv, "hV")) != EOF) {
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switch (c) {
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case 'V':
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version(basename(argv[0]));
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break;
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case 'h': /*FALLTHROUGH*/
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default:
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errflag++;
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break;
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}
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}
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if (errflag || (argc-optind != 1))
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{
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free (db_path);
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usage(basename(argv[0]));
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}
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/* open input and output files */
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if ((buffer = malloc (MAX_LINE_LENGTH)) == NULL) {
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fprintf(stderr,"couldn't allocate line buffer\n");
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free (db_path);
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exit (-1);
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}
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if ((FInPtr = fopen(argv[argc-1],"r")) == NULL) {
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fprintf(stderr,"Error opening %s; exiting.\n",argv[argc-1]);
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free (db_path);
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free(buffer);
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exit(1);
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}
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if ((FOutPtr = fopen(db_path,"wb+")) == NULL) {
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fprintf(stderr,"Error opening database file %s; exiting.\n",db_path);
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free (db_path);
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free(buffer);
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exit(1);
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}
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/* Compile array of names */
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lines = 0;
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namecount = 0;
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/* space for # of array entries */
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fwrite((void *)&namecount,sizeof(namecount),1,FOutPtr);
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while(mygets(buffer,&lines,FInPtr) != -1) {
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if (!strncmp(buffer,NAME,FIELD_LEN)) { /* found a match */
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strncpy(nameStruct.name,&buffer[FIELD_LEN],NAME_LEN-1);
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nameStruct.name[NAME_LEN-1] = '\0';
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fwrite((void *)&nameStruct,sizeof(nameStruct),1,FOutPtr);
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namecount++;
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}
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}
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if ((record_locs = malloc (namecount*sizeof(long int)))==NULL) {
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fprintf(stderr,"malloc of record_locs failed (%ld bytes); exiting\n",
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(long) namecount*sizeof(long int));
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exit(-1);
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}
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rewind(FInPtr);
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buffer[0] = '\0';
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lines = 0;
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fputc('\t',FOutPtr);
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/* Increment to first field */
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while (strncmp(buffer,NAME,FIELD_LEN)) /* found a match! */
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mygets(buffer,&lines,FInPtr);
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{ /* BUGBUG 22/10/95 Soenke Behrens */
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/* ORCA/C does not advance the file position indicator */
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/* correctly after above fputc(). This tries to remedy */
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/* the situation. Take out once library has been fixed */
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fprintf(FOutPtr,"Junk");
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fseek(FOutPtr,-4,SEEK_CUR);
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}
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/* Write out records and keep track of their file offsets */
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for (i = 0; i < namecount; i++) {
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record_locs[i] = ftell(FOutPtr);
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/* print out <Version>, <Shell>, <Author>, <Contact>, <Where>, <FTP> */
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for (j = 0; j < FIELD_COUNT-1; j++) {
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buffer[FIELD_LEN] = '\0';
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mygets(buffer,&lines,FInPtr);
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fprintf(FOutPtr,"%s\n",&buffer[FIELD_LEN]);
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}
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/* handle <description> field */
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for (;;) {
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if (mygets(buffer,&lines,FInPtr) == -1) break;
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if (!strncmp(buffer,NAME,FIELD_LEN)) break;
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fprintf(FOutPtr,"%s ",buffer);
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}
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fputc('\n',FOutPtr);
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}
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endOfFile = ftell(FOutPtr);
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fflush(FOutPtr); /*gdr 1*/
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rewind(FOutPtr);
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fwrite((void *)&namecount,sizeof(namecount),1,FOutPtr);
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fflush(FOutPtr); /*gdr 1*/
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/* time to go through the record_locs array and backpatch in */
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/* all the record locations. A little slower than necessary */
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/* perhaps, but it gets the job done. */
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for (i = 0; i < namecount; i++) {
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fread(&nameStruct,sizeof(nameStruct),1,FOutPtr);
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fseek(FOutPtr,-(sizeof(nameStruct)),SEEK_CUR);
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nameStruct.offset = record_locs[i];
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fwrite((void *)&nameStruct,sizeof(nameStruct),(size_t) 1,FOutPtr);
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fflush(FOutPtr);
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}
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fseek(FOutPtr,endOfFile,SEEK_SET);
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fclose(FOutPtr);
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#ifdef __GNO__
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/* change the filetype of the database to BIN */
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changeToBin(db_path);
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#endif
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free(db_path);
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free(record_locs);
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free(buffer);
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#ifdef __STACK_CHECK__
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fprintf(stderr,"stack usage: %d bytes\n", _endStackCheck());
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#endif
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return 0;
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}
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