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-rw-r--r--src/vms-pp.c243
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diff --git a/src/vms-pp.c b/src/vms-pp.c
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-/* vms_pp - preprocess emacs files in such a way that they can be
- * compiled on VMS without warnings.
- * Copyright (C) 1986 Free Software Foundation, Inc.
-
- This file is part of GNU Emacs.
-
-GNU Emacs 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.
-
-GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA.
-
- *
- * Usage:
- * vms_pp infile outfile
- * implicit inputs:
- * The file "vms_pp.trans" has the names and their translations.
- * description:
- * Vms_pp takes the input file and scans it, replacing the long
- * names with shorter names according to the table read in from
- * vms_pp.trans. The line is then written to the output file.
- *
- * Additionally, the "#undef foo" construct is replaced with:
- * #ifdef foo
- * #undef foo
- * #endif
- *
- * The construct #if defined(foo) is replaced with
- * #ifdef foo
- * #define foo_VAL 1
- * #else
- * #define foo_VAL 0
- * #endif
- * #define defined(XX) XX_val
- * #if defined(foo)
- *
- * This last construction only works on single line #if's and takes
- * advantage of a questionable C pre-processor trick. If there are
- * comments within the #if, that contain "defined", then this will
- * bomb.
- */
-#include <stdio.h>
-
-#define Max_table 100
-#define Table_name "vms_pp.trans"
-#define Word_member \
-"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_$"
-
-static FILE *in,*out; /* read from, write to */
-struct item { /* symbol table entries */
- char *name;
- char *value;
-};
-static struct item name_table[Max_table]; /* symbol table */
-static int defined_defined = 0; /* small optimization */
-
-main(argc,argv) int argc; char **argv; {
- char buffer[1024];
-
- if(argc != 3) { /* check argument count */
- fprintf(stderr,"usage: vms_pp infile outfile");
- exit();
- }
- init_table(); /* read in translation table */
-
-/* open input and output files
- */
- if((in = fopen(argv[1],"r")) == NULL) {
- fprintf(stderr,"vms_pp: unable to open file '%s'",argv[1]);
- exit();
- }
- if((out = fopen(argv[2],"w")) == NULL) {
- fprintf(stderr,"vms_pp: unable to create file '%s'",argv[2]);
- exit();
- }
-
- while(fgets(buffer,1023,in) != NULL) { /* loop through buffer until end */
- process_line(buffer); /* process the line */
- fputs(buffer,out); /* write out the line */
- }
-}
-
-/* buy - allocate and copy a string
- */
-static char *buy(str) char *str; {
- char *temp;
-
- if(!(temp = malloc(strlen(str)+1))) {
- fprintf(stderr,"vms_pp: can't allocate memory");
- exit();
- }
- strcpy(temp,str);
- return temp;
-}
-
-/* gather_word - return a buffer full of the next word
- */
-static char *gather_word(ptr,word) char *ptr, *word;{
- for(; strchr(Word_member,*ptr); ptr++,word++)
- *word = *ptr;
- *word = 0;
- return ptr;
-}
-
-/* skip_white - skip white space
- */
-static char *skip_white(ptr) char *ptr; {
- while(*ptr == ' ' || *ptr == '\t')
- ptr++;
- return ptr;
-}
-
-/* init_table - initialize translation table.
- */
-init_table() {
- char buf[256],*ptr,word[128];
- FILE *in;
- int i;
-
- if((in = fopen(Table_name,"r")) == NULL) { /* open file */
- fprintf(stderr,"vms_pp: can't open '%s'",Table_name);
- exit();
- }
- for(i = 0; fgets(buf,255,in) != NULL;) { /* loop through lines */
- ptr = skip_white(buf);
- if(*ptr == '!') /* skip comments */
- continue;
- ptr = gather_word(ptr,word); /* get long word */
- if(*word == 0) { /* bad entry */
- fprintf(stderr,"vms_pp: bad input line '%s'\n",buf);
- continue;
- }
- name_table[i].name = buy(word); /* set up the name */
- ptr = skip_white(ptr); /* skip white space */
- ptr = gather_word(ptr,word); /* get equivalent name */
- if(*word == 0) { /* bad entry */
- fprintf(stderr,"vms_pp: bad input line '%s'\n",buf);
- continue;
- }
- name_table[i].value = buy(word); /* and the equivalent name */
- i++; /* increment to next position */
- }
- for(; i < Max_table; i++) /* mark rest as unused */
- name_table[i].name = 0;
-}
-
-/* process_line - do actual line processing
- */
-process_line(buf) char *buf; {
- char *in_ptr,*out_ptr;
- char word[128],*ptr;
- int len;
-
- check_pp(buf); /* check for preprocessor lines */
-
- for(in_ptr = out_ptr = buf; *in_ptr;) {
- if(!strchr(Word_member,*in_ptr)) /* non alpha-numeric? just copy */
- *out_ptr++ = *in_ptr++;
- else {
- in_ptr = gather_word(in_ptr,word); /* get the 'word' */
- if(strlen(word) > 31) /* length is too long */
- replace_word(word); /* replace the word */
- for(ptr = word; *ptr; ptr++,out_ptr++) /* copy out the word */
- *out_ptr = *ptr;
- }
- }
- *out_ptr = 0;
-}
-
-/* check_pp - check for preprocessor lines
- */
-check_pp(buf) char *buf; {
- char *ptr,*p;
- char word[128];
-
- ptr = skip_white(buf); /* skip white space */
- if(*ptr != '#') /* is this a preprocessor line? */
- return; /* no, just return */
-
- ptr = skip_white(++ptr); /* skip white */
- ptr = gather_word(ptr,word); /* get command word */
- if(!strcmp("undef",word)) { /* undef? */
- ptr = skip_white(ptr);
- ptr = gather_word(ptr,word); /* get the symbol to undef */
- fprintf(out,"#ifdef %s\n",word);
- fputs(buf,out);
- strcpy(buf,"#endif");
- return;
- }
- if(!strcmp("if",word)) { /* check for if */
- for(;;) {
- ptr = strchr(ptr,'d'); /* look for d in defined */
- if(!ptr) /* are we done? */
- return;
- if(strchr(Word_member,*(ptr-1))){ /* at beginning of word? */
- ptr++; continue; /* no, continue looking */
- }
- ptr = gather_word(ptr,word); /* get the word */
- if(strcmp(word,"defined")) /* skip if not defined */
- continue;
- ptr = skip_white(ptr); /* skip white */
- if(*ptr != '(') /* look for open paren */
- continue; /* error, continue */
- ptr++; /* skip paren */
- ptr = skip_white(ptr); /* more white skipping */
- ptr = gather_word(ptr,word); /* get the thing to test */
- if(!*word) /* null word is bad */
- continue;
- fprintf(out,"#ifdef %s\n",word); /* generate the code */
- fprintf(out,"#define %s_VAL 1\n",word);
- fprintf(out,"#else\n");
- fprintf(out,"#define %s_VAL 0\n",word);
- fprintf(out,"#endif\n");
- if(!defined_defined) {
- fprintf(out,"#define defined(XXX) XXX/**/_VAL\n");
- defined_defined = 1;
- }
- }
- }
-}
-
-/* replace_word - look the word up in the table, and replace it
- * if a match is found.
- */
-replace_word(word) char *word; {
- int i;
-
- for(i = 0; i < Max_table && name_table[i].name; i++)
- if(!strcmp(word,name_table[i].name)) {
- strcpy(word,name_table[i].value);
- return;
- }
- fprintf(stderr,"couldn't find '%s'\n",word);
-}
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