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- /*
- * RCS file input
- */
- /*********************************************************************************
- * Lexical Analysis.
- * hashtable, Lexinit, nextlex, getlex, getkey,
- * getid, getnum, readstring, printstring, savestring,
- * checkid, fatserror, error, faterror, warn, diagnose
- * Testprogram: define LEXDB
- *********************************************************************************
- */
-
- /* Copyright (C) 1982, 1988, 1989 Walter Tichy
- Copyright 1990, 1991, 1992 by Paul Eggert
- Distributed under license by the Free Software Foundation, Inc.
-
- This file is part of RCS.
-
- RCS 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.
-
- RCS 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 RCS; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- Report problems and direct all questions to:
-
- rcs-bugs@cs.purdue.edu
-
- */
-
-
-
- /* $Log: rcslex.c,v $
- * Revision 5.14 1992/07/28 16:12:44 eggert
- * Identifiers may now start with a digit and (unless they are symbolic names)
- * may contain `.'. Avoid `unsigned'. Statement macro names now end in _.
- *
- * Revision 5.13 1992/02/17 23:02:27 eggert
- * Work around NFS mmap SIGBUS problem.
- *
- * Revision 5.12 1992/01/06 02:42:34 eggert
- * Use OPEN_O_BINARY if mode contains 'b'.
- *
- * Revision 5.11 1991/11/03 03:30:44 eggert
- * Fix porting bug to ancient hosts lacking vfprintf.
- *
- * Revision 5.10 1991/10/07 17:32:46 eggert
- * Support piece tables even if !has_mmap.
- *
- * Revision 5.9 1991/09/24 00:28:42 eggert
- * Don't export errsay().
- *
- * Revision 5.8 1991/08/19 03:13:55 eggert
- * Add eoflex(), mmap support. Tune.
- *
- * Revision 5.7 1991/04/21 11:58:26 eggert
- * Add MS-DOS support.
- *
- * Revision 5.6 1991/02/25 07:12:42 eggert
- * Work around fputs bug. strsave -> str_save (DG/UX name clash)
- *
- * Revision 5.5 1990/12/04 05:18:47 eggert
- * Use -I for prompts and -q for diagnostics.
- *
- * Revision 5.4 1990/11/19 20:05:28 hammer
- * no longer gives warning about unknown keywords if -q is specified
- *
- * Revision 5.3 1990/11/01 05:03:48 eggert
- * When ignoring unknown phrases, copy them to the output RCS file.
- *
- * Revision 5.2 1990/09/04 08:02:27 eggert
- * Count RCS lines better.
- *
- * Revision 5.1 1990/08/29 07:14:03 eggert
- * Work around buggy compilers with defective argument promotion.
- *
- * Revision 5.0 1990/08/22 08:12:55 eggert
- * Remove compile-time limits; use malloc instead.
- * Report errno-related errors with perror().
- * Ansify and Posixate. Add support for ISO 8859.
- * Use better hash function.
- *
- * Revision 4.6 89/05/01 15:13:07 narten
- * changed copyright header to reflect current distribution rules
- *
- * Revision 4.5 88/08/28 15:01:12 eggert
- * Don't loop when writing error messages to a full filesystem.
- * Flush stderr/stdout when mixing output.
- * Yield exit status compatible with diff(1).
- * Shrink stdio code size; allow cc -R; remove lint.
- *
- * Revision 4.4 87/12/18 11:44:47 narten
- * fixed to use "varargs" in "fprintf"; this is required if it is to
- * work on a SPARC machine such as a Sun-4
- *
- * Revision 4.3 87/10/18 10:37:18 narten
- * Updating version numbers. Changes relative to 1.1 actually relative
- * to version 4.1
- *
- * Revision 1.3 87/09/24 14:00:17 narten
- * Sources now pass through lint (if you ignore printf/sprintf/fprintf
- * warnings)
- *
- * Revision 1.2 87/03/27 14:22:33 jenkins
- * Port to suns
- *
- * Revision 4.1 83/03/25 18:12:51 wft
- * Only changed $Header to $Id.
- *
- * Revision 3.3 82/12/10 16:22:37 wft
- * Improved error messages, changed exit status on error to 1.
- *
- * Revision 3.2 82/11/28 21:27:10 wft
- * Renamed ctab to map and included EOFILE; ctab is now a macro in rcsbase.h.
- * Added fflsbuf(), fputs(), and fprintf(), which abort the RCS operations
- * properly in case there is an IO-error (e.g., file system full).
- *
- * Revision 3.1 82/10/11 19:43:56 wft
- * removed unused label out:;
- * made sure all calls to getc() return into an integer, not a char.
- */
-
-
- /*
- #define LEXDB
- */
- /* version LEXDB is for testing the lexical analyzer. The testprogram
- * reads a stream of lexemes, enters the revision numbers into the
- * hashtable, and prints the recognized tokens. Keywords are recognized
- * as identifiers.
- */
-
-
-
- #include "rcsbase.h"
-
- libId(lexId, "$Id: rcslex.c,v 5.14 1992/07/28 16:12:44 eggert Exp $")
-
- static struct hshentry *nexthsh; /*pointer to next hash entry, set by lookup*/
-
- enum tokens nexttok; /*next token, set by nextlex */
-
- int hshenter; /*if true, next suitable lexeme will be entered */
- /*into the symbol table. Handle with care. */
- int nextc; /*next input character, initialized by Lexinit */
-
- long rcsline; /*current line-number of input */
- int nerror; /*counter for errors */
- int quietflag; /*indicates quiet mode */
- RILE * finptr; /*input file descriptor */
-
- FILE * frewrite; /*file descriptor for echoing input */
-
- FILE * foutptr; /* copy of frewrite, but 0 to suppress echo */
-
- static struct buf tokbuf; /* token buffer */
-
- char const * NextString; /* next token */
-
- /*
- * Our hash algorithm is h[0] = 0, h[i+1] = 4*h[i] + c,
- * so hshsize should be odd.
- * See B J McKenzie, R Harries & T Bell, Selecting a hashing algorithm,
- * Software--practice & experience 20, 2 (Feb 1990), 209-224.
- */
- #ifndef hshsize
- # define hshsize 511
- #endif
-
- static struct hshentry *hshtab[hshsize]; /*hashtable */
-
- static int ignored_phrases; /* have we ignored phrases in this RCS file? */
-
- void
- warnignore()
- {
- if (! (ignored_phrases|quietflag)) {
- ignored_phrases = true;
- warn("Unknown phrases like `%s ...;' are in the RCS file.", NextString);
- }
- }
-
-
-
- static void
- lookup(str)
- char const *str;
- /* Function: Looks up the character string pointed to by str in the
- * hashtable. If the string is not present, a new entry for it is created.
- * In any case, the address of the corresponding hashtable entry is placed
- * into nexthsh.
- */
- {
- register unsigned ihash; /* index into hashtable */
- register char const *sp;
- register struct hshentry *n, **p;
-
- /* calculate hash code */
- sp = str;
- ihash = 0;
- while (*sp)
- ihash = (ihash<<2) + *sp++;
- ihash %= hshsize;
-
- for (p = &hshtab[ihash]; ; p = &n->nexthsh)
- if (!(n = *p)) {
- /* empty slot found */
- *p = n = ftalloc(struct hshentry);
- n->num = fstr_save(str);
- n->nexthsh = nil;
- # ifdef LEXDB
- VOID printf("\nEntered: %s at %u ", str, ihash);
- # endif
- break;
- } else if (strcmp(str, n->num) == 0)
- /* match found */
- break;
- nexthsh = n;
- NextString = n->num;
- }
-
-
-
-
-
-
- void
- Lexinit()
- /* Function: Initialization of lexical analyzer:
- * initializes the hashtable,
- * initializes nextc, nexttok if finptr != 0
- */
- { register int c;
-
- for (c = hshsize; 0 <= --c; ) {
- hshtab[c] = nil;
- }
-
- nerror = 0;
- if (finptr) {
- foutptr = 0;
- hshenter = true;
- ignored_phrases = false;
- rcsline = 1;
- bufrealloc(&tokbuf, 2);
- Iget_(finptr, nextc)
- nextlex(); /*initial token*/
- }
- }
-
-
-
-
-
-
-
- void
- nextlex()
-
- /* Function: Reads the next token and sets nexttok to the next token code.
- * Only if hshenter is set, a revision number is entered into the
- * hashtable and a pointer to it is placed into nexthsh.
- * This is useful for avoiding that dates are placed into the hashtable.
- * For ID's and NUM's, NextString is set to the character string.
- * Assumption: nextc contains the next character.
- */
- { register c;
- declarecache;
- register FILE *frew;
- register char * sp;
- char const *limit;
- register enum tokens d;
- register RILE *fin;
-
- fin=finptr; frew=foutptr;
- setupcache(fin); cache(fin);
- c = nextc;
-
- for (;;) { switch ((d = ctab[c])) {
-
- default:
- fatserror("unknown character `%c'", c);
- /*NOTREACHED*/
-
- case NEWLN:
- ++rcsline;
- # ifdef LEXDB
- afputc('\n',stdout);
- # endif
- /* Note: falls into next case */
-
- case SPACE:
- GETC_(frew, c)
- continue;
-
- case IDCHAR:
- case LETTER:
- case Letter:
- d = ID;
- /* fall into */
- case DIGIT:
- case PERIOD:
- sp = tokbuf.string;
- limit = sp + tokbuf.size;
- *sp++ = c;
- for (;;) {
- GETC_(frew, c)
- switch (ctab[c]) {
- case IDCHAR:
- case LETTER:
- case Letter:
- d = ID;
- /* fall into */
- case DIGIT:
- case PERIOD:
- *sp++ = c;
- if (limit <= sp)
- sp = bufenlarge(&tokbuf, &limit);
- continue;
- }
- break;
- }
- *sp = 0;
- if (d == DIGIT || d == PERIOD) {
- d = NUM;
- if (hshenter) {
- lookup(tokbuf.string);
- break;
- }
- }
- NextString = fstr_save(tokbuf.string);
- break;
-
- case SBEGIN: /* long string */
- d = STRING;
- /* note: only the initial SBEGIN has been read*/
- /* read the string, and reset nextc afterwards*/
- break;
-
- case COLON:
- case SEMI:
- GETC_(frew, c)
- break;
- } break; }
- nextc = c;
- nexttok = d;
- uncache(fin);
- }
-
- int
- eoflex()
- /*
- * Yield true if we look ahead to the end of the input, false otherwise.
- * nextc becomes undefined at end of file.
- */
- {
- register int c;
- declarecache;
- register FILE *fout;
- register RILE *fin;
-
- c = nextc;
- fin = finptr;
- fout = foutptr;
- setupcache(fin); cache(fin);
-
- for (;;) {
- switch (ctab[c]) {
- default:
- nextc = c;
- uncache(fin);
- return false;
-
- case NEWLN:
- ++rcsline;
- /* fall into */
- case SPACE:
- cachegeteof_(c, {uncache(fin);return true;})
- break;
- }
- if (fout)
- aputc_(c, fout)
- }
- }
-
-
- int getlex(token)
- enum tokens token;
- /* Function: Checks if nexttok is the same as token. If so,
- * advances the input by calling nextlex and returns true.
- * otherwise returns false.
- * Doesn't work for strings and keywords; loses the character string for ids.
- */
- {
- if (nexttok==token) {
- nextlex();
- return(true);
- } else return(false);
- }
-
- int
- getkeyopt(key)
- char const *key;
- /* Function: If the current token is a keyword identical to key,
- * advances the input by calling nextlex and returns true;
- * otherwise returns false.
- */
- {
- if (nexttok==ID && strcmp(key,NextString) == 0) {
- /* match found */
- ffree1(NextString);
- nextlex();
- return(true);
- }
- return(false);
- }
-
- void
- getkey(key)
- char const *key;
- /* Check that the current input token is a keyword identical to key,
- * and advance the input by calling nextlex.
- */
- {
- if (!getkeyopt(key))
- fatserror("missing '%s' keyword", key);
- }
-
- void
- getkeystring(key)
- char const *key;
- /* Check that the current input token is a keyword identical to key,
- * and advance the input by calling nextlex; then look ahead for a string.
- */
- {
- getkey(key);
- if (nexttok != STRING)
- fatserror("missing string after '%s' keyword", key);
- }
-
-
- char const *
- getid()
- /* Function: Checks if nexttok is an identifier. If so,
- * advances the input by calling nextlex and returns a pointer
- * to the identifier; otherwise returns nil.
- * Treats keywords as identifiers.
- */
- {
- register char const *name;
- if (nexttok==ID) {
- name = NextString;
- nextlex();
- return name;
- } else return nil;
- }
-
-
- struct hshentry * getnum()
- /* Function: Checks if nexttok is a number. If so,
- * advances the input by calling nextlex and returns a pointer
- * to the hashtable entry. Otherwise returns nil.
- * Doesn't work if hshenter is false.
- */
- {
- register struct hshentry * num;
- if (nexttok==NUM) {
- num=nexthsh;
- nextlex();
- return num;
- } else return nil;
- }
-
- struct cbuf
- getphrases(key)
- char const *key;
- /* Get a series of phrases that do not start with KEY, yield resulting buffer.
- * Stop when the next phrase starts with a token that is not an identifier,
- * or is KEY.
- * Assume !foutptr.
- */
- {
- declarecache;
- register int c;
- register char *p;
- char const *limit;
- register char const *ki, *kn;
- struct cbuf r;
- struct buf b;
- register RILE *fin;
-
- if (nexttok!=ID || strcmp(NextString,key) == 0) {
- r.string = 0;
- r.size = 0;
- return r;
- } else {
- warnignore();
- fin = finptr;
- setupcache(fin); cache(fin);
- bufautobegin(&b);
- bufscpy(&b, NextString);
- ffree1(NextString);
- p = b.string + strlen(b.string);
- limit = b.string + b.size;
- c = nextc;
- for (;;) {
- for (;;) {
- if (limit <= p)
- p = bufenlarge(&b, &limit);
- *p++ = c;
- switch (ctab[c]) {
- default:
- fatserror("unknown character `%c'", c);
- /*NOTREACHED*/
- case NEWLN:
- ++rcsline;
- /* fall into */
- case COLON: case DIGIT: case LETTER: case Letter:
- case PERIOD: case SPACE:
- cacheget_(c)
- continue;
- case SBEGIN: /* long string */
- for (;;) {
- for (;;) {
- if (limit <= p)
- p = bufenlarge(&b, &limit);
- cacheget_(c)
- *p++ = c;
- switch (c) {
- case '\n':
- ++rcsline;
- /* fall into */
- default:
- continue;
-
- case SDELIM:
- break;
- }
- break;
- }
- cacheget_(c)
- if (c != SDELIM)
- break;
- if (limit <= p)
- p = bufenlarge(&b, &limit);
- *p++ = c;
- }
- continue;
- case SEMI:
- cacheget_(c)
- if (ctab[c] == NEWLN) {
- ++rcsline;
- if (limit <= p)
- p = bufenlarge(&b, &limit);
- *p++ = c;
- cacheget_(c)
- }
- for (;;) {
- switch (ctab[c]) {
- case NEWLN:
- ++rcsline;
- /* fall into */
- case SPACE:
- cacheget_(c)
- continue;
-
- default: break;
- }
- break;
- }
- break;
- }
- break;
- }
- if (ctab[c] == Letter) {
- for (kn = key; c && *kn==c; kn++)
- cacheget_(c)
- if (!*kn)
- switch (ctab[c]) {
- case DIGIT: case LETTER: case Letter:
- case IDCHAR: case PERIOD:
- break;
- default:
- nextc = c;
- NextString = fstr_save(key);
- nexttok = ID;
- uncache(fin);
- goto returnit;
- }
- for (ki=key; ki<kn; ) {
- if (limit <= p)
- p = bufenlarge(&b, &limit);
- *p++ = *ki++;
- }
- } else {
- nextc = c;
- uncache(fin);
- nextlex();
- break;
- }
- }
- returnit:
- return bufremember(&b, (size_t)(p - b.string));
- }
- }
-
-
- void
- readstring()
- /* skip over characters until terminating single SDELIM */
- /* If foutptr is set, copy every character read to foutptr. */
- /* Does not advance nextlex at the end. */
- { register c;
- declarecache;
- register FILE *frew;
- register RILE *fin;
- fin=finptr; frew=foutptr;
- setupcache(fin); cache(fin);
- for (;;) {
- GETC_(frew, c)
- switch (c) {
- case '\n':
- ++rcsline;
- break;
-
- case SDELIM:
- GETC_(frew, c)
- if (c != SDELIM) {
- /* end of string */
- nextc = c;
- uncache(fin);
- return;
- }
- break;
- }
- }
- }
-
-
- void
- printstring()
- /* Function: copy a string to stdout, until terminated with a single SDELIM.
- * Does not advance nextlex at the end.
- */
- {
- register c;
- declarecache;
- register FILE *fout;
- register RILE *fin;
- fin=finptr;
- fout = stdout;
- setupcache(fin); cache(fin);
- for (;;) {
- cacheget_(c)
- switch (c) {
- case '\n':
- ++rcsline;
- break;
- case SDELIM:
- cacheget_(c)
- if (c != SDELIM) {
- nextc=c;
- uncache(fin);
- return;
- }
- break;
- }
- aputc_(c,fout)
- }
- }
-
-
-
- struct cbuf
- savestring(target)
- struct buf *target;
- /* Copies a string terminated with SDELIM from file finptr to buffer target.
- * Double SDELIM is replaced with SDELIM.
- * If foutptr is set, the string is also copied unchanged to foutptr.
- * Does not advance nextlex at the end.
- * Yield a copy of *TARGET, except with exact length.
- */
- {
- register c;
- declarecache;
- register FILE *frew;
- register char *tp;
- register RILE *fin;
- char const *limit;
- struct cbuf r;
-
- fin=finptr; frew=foutptr;
- setupcache(fin); cache(fin);
- tp = target->string; limit = tp + target->size;
- for (;;) {
- GETC_(frew, c)
- switch (c) {
- case '\n':
- ++rcsline;
- break;
- case SDELIM:
- GETC_(frew, c)
- if (c != SDELIM) {
- /* end of string */
- nextc=c;
- r.string = target->string;
- r.size = tp - r.string;
- uncache(fin);
- return r;
- }
- break;
- }
- if (tp == limit)
- tp = bufenlarge(target, &limit);
- *tp++ = c;
- }
- }
-
-
- static char *
- checkidentifier(id, delimiter, dotok)
- register char *id;
- int delimiter;
- register int dotok;
- /* Function: check whether the string starting at id is an */
- /* identifier and return a pointer to the delimiter*/
- /* after the identifier. White space, delim and 0 */
- /* are legal delimiters. Aborts the program if not*/
- /* a legal identifier. Useful for checking commands*/
- /* If !delim, the only delimiter is 0. */
- /* Allow '.' in identifier only if DOTOK is set. */
- {
- register char *temp;
- register char c;
- register char delim = delimiter;
- int isid = false;
-
- temp = id;
- for (;; id++) {
- switch (ctab[(unsigned char)(c = *id)]) {
- case IDCHAR:
- case LETTER:
- case Letter:
- isid = true;
- continue;
-
- case DIGIT:
- continue;
-
- case PERIOD:
- if (dotok)
- continue;
- break;
- }
- break;
- }
- if ( ! isid
- || c && (!delim || c!=delim && c!=' ' && c!='\t' && c!='\n')
- ) {
- /* append \0 to end of id before error message */
- while ((c = *id) && c!=' ' && c!='\t' && c!='\n' && c!=delim)
- id++;
- *id = '\0';
- faterror("invalid %s `%s'",
- dotok ? "identifier" : "symbol", temp
- );
- }
- return id;
- }
-
- char *
- checkid(id, delimiter)
- char *id;
- int delimiter;
- {
- return checkidentifier(id, delimiter, true);
- }
-
- char *
- checksym(sym, delimiter)
- char *sym;
- int delimiter;
- {
- return checkidentifier(sym, delimiter, false);
- }
-
- void
- checksid(id)
- char *id;
- /* Check whether the string ID is an identifier. */
- {
- VOID checkid(id, 0);
- }
-
- void
- checkssym(sym)
- char *sym;
- {
- VOID checksym(sym, 0);
- }
-
-
- static RILE *
- #if has_mmap && large_memory
- fd2_RILE(fd, name, status)
- #else
- fd2RILE(fd, name, mode, status)
- char const *mode;
- #endif
- int fd;
- char const *name;
- register struct stat *status;
- {
- struct stat st;
-
- if (!status)
- status = &st;
- if (fstat(fd, status) != 0)
- efaterror(name);
- if (!S_ISREG(status->st_mode)) {
- error("`%s' is not a regular file", name);
- VOID close(fd);
- errno = EINVAL;
- return 0;
- } else {
-
- # if ! (has_mmap && large_memory)
- FILE *stream;
- if (!(stream = fdopen(fd, mode)))
- efaterror(name);
- # endif
-
- # if !large_memory
- return stream;
- # else
- # define RILES 3
- {
- static RILE rilebuf[RILES];
-
- register RILE *f;
- size_t s = status->st_size;
-
- if (s != status->st_size)
- faterror("`%s' is enormous", name);
- for (f = rilebuf; f->base; f++)
- if (f == rilebuf+RILES)
- faterror("too many RILEs");
- if (!s) {
- static unsigned char dummy;
- f->base = &dummy;
- } else {
- # if has_mmap
- catchmmapints();
- if (
- (f->base = (unsigned char *)mmap(
- (caddr_t)0, s, PROT_READ, MAP_SHARED,
- fd, (off_t)0
- )) == (unsigned char *)-1
- )
- efaterror("mmap");
- # else
- f->base = tnalloc(unsigned char, s);
- # endif
- }
- f->ptr = f->base;
- f->lim = f->base + s;
- # if has_mmap
- f->fd = fd;
- # else
- f->readlim = f->base;
- f->stream = stream;
- # endif
- if_advise_access(s, f, MADV_SEQUENTIAL);
- return f;
- }
- # endif
- }
- }
-
- #if !has_mmap && large_memory
- int
- Igetmore(f)
- register RILE *f;
- {
- register fread_type r;
- register size_t s = f->lim - f->readlim;
-
- if (BUFSIZ < s)
- s = BUFSIZ;
- if (!(r = Fread(f->readlim, sizeof(*f->readlim), s, f->stream))) {
- testIerror(f->stream);
- f->lim = f->readlim; /* The file might have shrunk! */
- return 0;
- }
- f->readlim += r;
- return 1;
- }
- #endif
-
- #if has_madvise && has_mmap && large_memory
- void
- advise_access(f, advice)
- register RILE *f;
- int advice;
- {
- if (madvise((caddr_t)f->base, (size_t)(f->lim - f->base), advice) != 0)
- efaterror("madvise");
- }
- #endif
-
- RILE *
- #if has_mmap && large_memory
- I_open(name, status)
- #else
- Iopen(name, mode, status)
- char const *mode;
- #endif
- char const *name;
- struct stat *status;
- /* Open NAME for reading, yield its descriptor, and set *STATUS. */
- {
- int fd = open(name, O_RDONLY
- # if OPEN_O_BINARY && !(has_mmap && large_memory)
- | (strchr(mode,'b') ? OPEN_O_BINARY : 0)
- # endif
- );
-
- if (fd < 0)
- return 0;
- # if has_mmap && large_memory
- return fd2_RILE(fd, name, status);
- # else
- return fd2RILE(fd, name, mode, status);
- # endif
- }
-
-
- #if !large_memory
- # define Iclose(f) fclose(f)
- #else
- static int
- Iclose(f)
- register RILE *f;
- {
- # if has_mmap
- size_t s = f->lim - f->base;
- if (s && munmap((caddr_t)f->base, s) != 0)
- return -1;
- f->base = 0;
- return close(f->fd);
- # else
- tfree(f->base);
- f->base = 0;
- return fclose(f->stream);
- # endif
- }
- #endif
-
-
- static int Oerrloop;
-
- exiting void
- Oerror()
- {
- if (Oerrloop)
- exiterr();
- Oerrloop = true;
- efaterror("output error");
- }
-
- exiting void Ieof() { fatserror("unexpected end of file"); }
- exiting void Ierror() { efaterror("input error"); }
- void testIerror(f) FILE *f; { if (ferror(f)) Ierror(); }
- void testOerror(o) FILE *o; { if (ferror(o)) Oerror(); }
-
- void Ifclose(f) RILE *f; { if (f && Iclose(f)!=0) Ierror(); }
- void Ofclose(f) FILE *f; { if (f && fclose(f)!=0) Oerror(); }
- void Izclose(p) RILE **p; { Ifclose(*p); *p = 0; }
- void Ozclose(p) FILE **p; { Ofclose(*p); *p = 0; }
-
- #if !large_memory
- void
- testIeof(f)
- FILE *f;
- {
- testIerror(f);
- if (feof(f))
- Ieof();
- }
- void Irewind(f) FILE *f; { if (fseek(f,0L,SEEK_SET) != 0) Ierror(); }
- #endif
-
- void eflush()
- {
- if (fflush(stderr) != 0 && !Oerrloop)
- Oerror();
- }
-
- void oflush()
- {
- if (fflush(workstdout ? workstdout : stdout) != 0 && !Oerrloop)
- Oerror();
- }
-
- static exiting void
- fatcleanup(already_newline)
- int already_newline;
- {
- VOID fprintf(stderr, already_newline+"\n%s aborted\n", cmdid);
- exiterr();
- }
-
- static void errsay() { oflush(); aprintf(stderr,"%s error: ",cmdid); nerror++; }
- static void fatsay() { oflush(); VOID fprintf(stderr,"%s error: ",cmdid); }
-
- void eerror(s) char const *s; { enerror(errno,s); }
-
- void
- enerror(e,s)
- int e;
- char const *s;
- {
- errsay();
- errno = e;
- perror(s);
- eflush();
- }
-
- exiting void efaterror(s) char const *s; { enfaterror(errno,s); }
-
- exiting void
- enfaterror(e,s)
- int e;
- char const *s;
- {
- fatsay();
- errno = e;
- perror(s);
- fatcleanup(true);
- }
-
- #if has_prototypes
- void
- error(char const *format,...)
- #else
- /*VARARGS1*/ void error(format, va_alist) char const *format; va_dcl
- #endif
- /* non-fatal error */
- {
- va_list args;
- errsay();
- vararg_start(args, format);
- fvfprintf(stderr, format, args);
- va_end(args);
- afputc('\n',stderr);
- eflush();
- }
-
- #if has_prototypes
- exiting void
- fatserror(char const *format,...)
- #else
- /*VARARGS1*/ exiting void
- fatserror(format, va_alist) char const *format; va_dcl
- #endif
- /* fatal syntax error */
- {
- va_list args;
- oflush();
- VOID fprintf(stderr, "%s: %s:%ld: ", cmdid, RCSname, rcsline);
- vararg_start(args, format);
- fvfprintf(stderr, format, args);
- va_end(args);
- fatcleanup(false);
- }
-
- #if has_prototypes
- exiting void
- faterror(char const *format,...)
- #else
- /*VARARGS1*/ exiting void faterror(format, va_alist)
- char const *format; va_dcl
- #endif
- /* fatal error, terminates program after cleanup */
- {
- va_list args;
- fatsay();
- vararg_start(args, format);
- fvfprintf(stderr, format, args);
- va_end(args);
- fatcleanup(false);
- }
-
- #if has_prototypes
- void
- warn(char const *format,...)
- #else
- /*VARARGS1*/ void warn(format, va_alist) char const *format; va_dcl
- #endif
- /* prints a warning message */
- {
- va_list args;
- oflush();
- aprintf(stderr,"%s warning: ",cmdid);
- vararg_start(args, format);
- fvfprintf(stderr, format, args);
- va_end(args);
- afputc('\n',stderr);
- eflush();
- }
-
- void
- redefined(c)
- int c;
- {
- warn("redefinition of -%c option", c);
- }
-
- #if has_prototypes
- void
- diagnose(char const *format,...)
- #else
- /*VARARGS1*/ void diagnose(format, va_alist) char const *format; va_dcl
- #endif
- /* prints a diagnostic message */
- /* Unlike the other routines, it does not append a newline. */
- /* This lets some callers suppress the newline, and is faster */
- /* in implementations that flush stderr just at the end of each printf. */
- {
- va_list args;
- if (!quietflag) {
- oflush();
- vararg_start(args, format);
- fvfprintf(stderr, format, args);
- va_end(args);
- eflush();
- }
- }
-
-
-
- void
- afputc(c, f)
- /* afputc(c,f); acts like aputc_(c,f) but is smaller and slower. */
- int c;
- register FILE *f;
- {
- aputc_(c,f)
- }
-
-
- void
- aputs(s, iop)
- char const *s;
- FILE *iop;
- /* Function: Put string s on file iop, abort on error.
- */
- {
- #if has_fputs
- if (fputs(s, iop) < 0)
- Oerror();
- #else
- awrite(s, strlen(s), iop);
- #endif
- }
-
-
-
- void
- #if has_prototypes
- fvfprintf(FILE *stream, char const *format, va_list args)
- #else
- fvfprintf(stream,format,args) FILE *stream; char *format; va_list args;
- #endif
- /* like vfprintf, except abort program on error */
- {
- #if has_vfprintf
- if (vfprintf(stream, format, args) < 0)
- #else
- # if has__doprintf
- _doprintf(stream, format, args);
- # else
- # if has__doprnt
- _doprnt(format, args, stream);
- # else
- int *a = (int *)args;
- VOID fprintf(stream, format,
- a[0], a[1], a[2], a[3], a[4],
- a[5], a[6], a[7], a[8], a[9]
- );
- # endif
- # endif
- if (ferror(stream))
- #endif
- Oerror();
- }
-
- #if has_prototypes
- void
- aprintf(FILE *iop, char const *fmt, ...)
- #else
- /*VARARGS2*/ void
- aprintf(iop, fmt, va_alist)
- FILE *iop;
- char const *fmt;
- va_dcl
- #endif
- /* Function: formatted output. Same as fprintf in stdio,
- * but aborts program on error
- */
- {
- va_list ap;
- vararg_start(ap, fmt);
- fvfprintf(iop, fmt, ap);
- va_end(ap);
- }
-
-
-
- #ifdef LEXDB
- /* test program reading a stream of lexemes and printing the tokens.
- */
-
-
-
- int
- main(argc,argv)
- int argc; char * argv[];
- {
- cmdid="lextest";
- if (argc<2) {
- aputs("No input file\n",stderr);
- exitmain(EXIT_FAILURE);
- }
- if (!(finptr=Iopen(argv[1], FOPEN_R, (struct stat*)0))) {
- faterror("can't open input file %s",argv[1]);
- }
- Lexinit();
- while (!eoflex()) {
- switch (nexttok) {
-
- case ID:
- VOID printf("ID: %s",NextString);
- break;
-
- case NUM:
- if (hshenter)
- VOID printf("NUM: %s, index: %d",nexthsh->num, nexthsh-hshtab);
- else
- VOID printf("NUM, unentered: %s",NextString);
- hshenter = !hshenter; /*alternate between dates and numbers*/
- break;
-
- case COLON:
- VOID printf("COLON"); break;
-
- case SEMI:
- VOID printf("SEMI"); break;
-
- case STRING:
- readstring();
- VOID printf("STRING"); break;
-
- case UNKN:
- VOID printf("UNKN"); break;
-
- default:
- VOID printf("DEFAULT"); break;
- }
- VOID printf(" | ");
- nextlex();
- }
- exitmain(EXIT_SUCCESS);
- }
-
- exiting void exiterr() { _exit(EXIT_FAILURE); }
-
-
- #endif
-