[unix-history] / usr / src / usr.bin / unifdef / unifdef.c

/* Copyright (c) 1982 Regents of the University of California */

static char sccsid[] = "@(#)unifdef.c	4.1	(Berkeley)	%G%";

#ifdef COMMENT

    unifdef - remove ifdef'ed lines

#endif

#include <stdio.h>
#include <ctype.h>
#define BSS
FILE *input;
#ifndef YES
#define YES 1
#define NO  0
#endif

char *progname BSS;
char *filename BSS;
char text BSS;          /* -t option in effect: this is a text file */
char lnblank BSS;       /* -l option in effect: blank deleted lines */
char complement BSS;    /* -c option in effect: complement the operation */
#define MAXSYMS 100
char true[MAXSYMS] BSS;
char ignore[MAXSYMS] BSS;
char *sym[MAXSYMS] BSS;
char insym[MAXSYMS] BSS;
char nsyms BSS;
char incomment BSS;
#define QUOTE1 0
#define QUOTE2 1
char inquote[2] BSS;
int exitstat BSS;
char *skipcomment ();
char *skipquote ();

main (argc, argv)
int argc;
char **argv;
{
    char **curarg;
    register char *cp;
    register char *cp1;
    char ignorethis;

    progname = argv[0][0] ? argv[0] : "unifdef";

    for (curarg = &argv[1]; --argc > 0; curarg++) {
	if (*(cp1 = cp = *curarg) != '-')
	    break;
	if (*++cp1 == 'i') {
	    ignorethis = YES;
	    cp1++;
	}
	else
	    ignorethis = NO;
	if (   (   *cp1 == 'd'
		|| *cp1 == 'u'
	       )
	    && cp1[1] != '\0'
	   ) {
	    if (nsyms >= MAXSYMS) {
		prname ();
		fprintf (stderr, "too many symbols.\n");
		exit (2);
	    }
	    ignore[nsyms] = ignorethis;
	    true[nsyms] = *cp1 == 'd' ? YES : NO;
	    sym[nsyms++] = &cp1[1];
	}
	else if (ignorethis)
	    goto unrec;
	else if (strcmp (&cp[1], "t") == 0)
	    text = YES;
	else if (strcmp (&cp[1], "l") == 0)
	    lnblank = YES;
	else if (strcmp (&cp[1], "c") == 0)
	    complement = YES;
	else {
 unrec:
	    prname ();
	    fprintf (stderr, "unrecognized option: %s\n", cp);
	    goto usage;
	}
    }
    if (nsyms == 0) {
 usage:
	fprintf (stderr, "\
Usage: %s [-l] [-t] [-c] [[-dsym] [-usym] [-idsym] [-iusym]]... [file]\n\
    At least one arg from [-d -u -id -iu] is required\n", progname);
	exit (2);
    }

    if (argc > 1) {
	prname ();
	fprintf (stderr, "can only do one file.\n");
    }
    else if (argc == 1) {
	filename = *curarg;
	if ((input = fopen (filename, "r")) != NULL) {
	    pfile();
	    fclose (input);
	}
	else {
	    prname ();
	    fprintf (stderr, "can't open %s\n", *curarg);
	}
    }
    else {
	filename = "[stdin]";
	input = stdin;
	pfile();
    }

    fflush (stdout);
    exit (exitstat);
}

/* types of input lines: */
#define PLAIN       0   /* ordinary line */
#define TRUE        1   /* a true  #ifdef of a symbol known to us */
#define FALSE       2   /* a false #ifdef of a symbol known to us */
#define OTHER       3   /* an #ifdef of a symbol not known to us */
#define ELSE        4   /* #else */
#define ENDIF       5   /* #endif */
#define LEOF        6   /* end of file */

char reject BSS;    /* 0 or 1: pass thru; 1 or 2: ignore comments */
int linenum BSS;    /* current line number */
int stqcline BSS;   /* start of current coment or quote */
char *errs[] = {
#define NO_ERR      0
			"",
#define END_ERR     1
			"",
#define ELSE_ERR    2
			"Inappropriate else",
#define ENDIF_ERR   3
			"Inappropriate endif",
#define IEOF_ERR    4
			"Premature EOF in ifdef",
#define CEOF_ERR    5
			"Premature EOF in comment",
#define Q1EOF_ERR   6
			"Premature EOF in quoted character",
#define Q2EOF_ERR   7
			"Premature EOF in quoted string"
};

pfile ()
{
    reject = 0;
    doif (-1, NO, reject, 0);
    return;
}

doif (thissym, inif, prevreject, depth)
register int thissym;   /* index of the symbol who was last ifdef'ed */
int inif;               /* YES or NO we are inside an ifdef */
int prevreject;         /* previous value of reject */
int depth;              /* depth of ifdef's */
{
    register int lineval;
    register int thisreject;
    int doret;          /* tmp return valud]e of doif */
    int cursym;         /* index of the symbol returned by checkline */
    int stline;         /* line number when called this time */

    stline = linenum;
    for (;;) {
	switch (lineval = checkline (&cursym)) {
	case PLAIN:
	    flushline (YES);
	    break;

	case TRUE:
	case FALSE:
	    thisreject = reject;
	    if (lineval == TRUE)
		insym[cursym] = 1;
	    else {
		if (reject < 2)
		    reject = ignore[cursym] ? 1 : 2;
		insym[cursym] = -1;
	    }
	    if (ignore[cursym])
		flushline (YES);
	    else {
		exitstat = 1;
		flushline (NO);
	    }
	    if ((doret = doif (cursym, YES, thisreject, depth + 1)) != NO_ERR)
		return error (doret, stline, depth);
    	    break;

	case OTHER:
	    flushline (YES);
	    if ((doret = doif (-1, YES, reject, depth + 1)) != NO_ERR)
		return error (doret, stline, depth);
	    break;

	case ELSE:
	    if (inif != 1)
		return error (ELSE_ERR, linenum, depth);
	    inif = 2;
	    if (thissym >= 0) {
		if ((insym[thissym] = -insym[thissym]) < 0)
		    reject = ignore[thissym] ? 1 : 2;
		else
		    reject = prevreject;
		if (!ignore[thissym]) {
		    flushline (NO);
		    break;
		}
	    }
	    flushline (YES);
	    break;

	case ENDIF:
	    if (inif == 0)
		return error (ENDIF_ERR, linenum, depth);
	    if (thissym >= 0) {
		insym[thissym] = 0;
		reject = prevreject;
		if (!ignore[thissym]) {
		    flushline (NO);
		    return NO_ERR;
		}
	    }
	    flushline (YES);
	    return NO_ERR;

	case LEOF: {
	    int err;
	    err =   incomment
		  ? CEOF_ERR
		  : inquote[QUOTE1]
		  ? Q1EOF_ERR
		  : inquote[QUOTE2]
		  ? Q2EOF_ERR
		  : NO_ERR;
	    if (inif) {
		if (err != NO_ERR)
		    error (err, stqcline, depth);
		return error (IEOF_ERR, stline, depth);
	    }
	    else if (err != NO_ERR)
		return error (err, stqcline, depth);
	    else
		return NO_ERR;
	    }
	}
    }
}

#define endsym(c) (!isalpha (c) && !isdigit (c) && c != '_')

#define MAXLINE 256
char tline[MAXLINE] BSS;

checkline (cursym)
int *cursym;
{
    register char *cp;
    register char *symp;
    register char chr;
    char *scp;
    int retval;
    int symind;
#   define KWSIZE 8
    char keyword[KWSIZE];

    linenum++;
    if (getlin (tline, sizeof tline, input, NO) == EOF)
        return LEOF;

    retval = PLAIN;
    if (   *(cp = tline) != '#'
	|| incomment
	|| inquote[QUOTE1]
	|| inquote[QUOTE2]
       )
	goto eol;

    cp = skipcomment (++cp);
    symp = keyword;
    while (!endsym (*cp)) {
	*symp = *cp++;
	if (++symp >= &keyword[KWSIZE])
	    goto eol;
    }
    *symp = '\0';

    if (strcmp (keyword, "ifdef") == 0) {
	retval = YES;
	goto ifdef;
    }
    else if (strcmp (keyword, "ifndef") == 0) {
	retval = NO;
 ifdef:
	scp = cp = skipcomment (++cp);
	if (incomment) {
	    retval = PLAIN;
	    goto eol;
	}
	for (symind = 0; ; ) {
	    if (insym[symind] == 0) {
		for ( symp = sym[symind], cp = scp
		    ; *symp && *cp == *symp
		    ; cp++, symp++
		    )
		    {}
		chr = *cp;
		if (*symp == '\0' && endsym (chr)) {
		    *cursym = symind;
		    retval = (retval ^ true[symind]) ? FALSE : TRUE;
		    break;
		}
	    }
	    if (++symind >= nsyms) {
		retval = OTHER;
		break;
	    }
	}
    }
    else if (strcmp (keyword, "if") == 0)
	retval = OTHER;
    else if (strcmp (keyword, "else") == 0)
	retval = ELSE;
    else if (strcmp (keyword, "endif") == 0)
	retval = ENDIF;

 eol:
    if (!text && !reject)
	for (; *cp; ) {
	    if (incomment)
		cp = skipcomment (cp);
	    else if (inquote[QUOTE1])
		cp = skipquote (cp, QUOTE1);
	    else if (inquote[QUOTE2])
		cp = skipquote (cp, QUOTE2);
	    else if (*cp == '/' && cp[1] == '*')
		cp = skipcomment (cp);
	    else if (*cp == '\'')
		cp = skipquote (cp, QUOTE1);
	    else if (*cp == '"')
		cp = skipquote (cp, QUOTE2);
	    else
		cp++;
	}
    return retval;
}

/*  Skip over comments and stop at the next charaacter
/*  position that is not whitespace.
/**/
char *
skipcomment (cp)
register char *cp;
{
    if (incomment)
	goto inside;
    for (;; cp++) {
        while (*cp == ' ' || *cp == '\t')
            cp++;
	if (text)
            return cp;
	if (   cp[0] != '/'
	    || cp[1] != '*'
	   )
            return cp;
	cp += 2;
	if (!incomment) {
	    incomment = YES;
	    stqcline = linenum;
	}
 inside:
	for (;;) {
	    for (; *cp != '*'; cp++)
		if (*cp == '\0')
		    return cp;
	    if (*++cp == '/')
		break;
	}
	incomment = NO;
    }
}

/*  Skip over a quoted string or character and stop at the next charaacter
/*  position that is not whitespace.
/**/
char *
skipquote (cp, type)
register char *cp;
register int type;
{
    register char qchar;

    qchar = type == QUOTE1 ? '\'' : '"';

    if (inquote[type])
	goto inside;
    for (;; cp++) {
	if (*cp != qchar)
	    return cp;
	cp++;
	if (!inquote[type]) {
	    inquote[type] = YES;
	    stqcline = linenum;
	}
 inside:
	for (; ; cp++) {
	    if (*cp == qchar)
		break;
	    if (   *cp == '\0'
		|| *cp == '\\'
		&& *++cp == '\0'
	       )
		return cp;
	}
	inquote[type] = NO;
    }
}

/*
/*   special getlin - treats form-feed as an end-of-line
/*                    and expands tabs if asked for
/*
/**/
getlin (line, maxline, inp, expandtabs)
register char *line;
int maxline;
FILE *inp;
int expandtabs;
{
    int tmp;
    register int num;
    register int chr;
#ifdef FFSPECIAL
    static char havechar = NO;  /* have leftover char from last time */
    static char svchar BSS;
#endif

    num = 0;
#ifdef FFSPECIAL
    if (havechar) {
	havechar = NO;
	chr = svchar;
	goto ent;
    }
#endif
    while (num + 8 < maxline) {   /* leave room for tab */
        chr = getc (inp);
	if (isprint (chr)) {
#ifdef FFSPECIAL
 ent:
#endif
	    *line++ = chr;
	    num++;
	}
	else
	    switch (chr) {
	    case EOF:
		return EOF;

	    case '\t':
		if (expandtabs) {
		    num += tmp = 8 - (num & 7);
		    do
			*line++ = ' ';
		    while (--tmp);
		    break;
		} 
            default:
                *line++ = chr;
                num++;
		break;

	    case '\n':
                *line = '\n';
                num++;
                goto end;
    
#ifdef FFSPECIAL
	    case '\f':
		if (++num == 1)
		    *line = '\f';
		else {
		    *line = '\n';
		    havechar = YES;
                    svchar = chr;
                }
                goto end;
#endif
	    }
    }
 end:
    *++line = '\0';
    return num;
}

flushline (keep)
{
    if ((keep && reject < 2) ^ complement)
	putlin (tline, stdout);
    else if (lnblank)
	putlin ("\n", stdout);
    return;
}

/*
/*  putlin - for tools
/*
/**/
putlin (line, fio)
register char *line;
register FILE *fio;
{
    register char chr;

    while (chr = *line++)
	putc (chr, fio);
    return;
}

prname ()
{
    fprintf (stderr, "%s: ", progname);
    return;
}


error (err, line, depth)
{
    if (err == END_ERR)
	return err;

    prname ();

#ifndef TESTING
    fprintf (stderr, "Error in %s line %d: %s.\n",
	     filename, line, errs[err]);
#endif

#ifdef TESTING
    fprintf (stderr, "Error in %s line %d: %s. ",
	     filename, line, errs[err]);
    fprintf (stderr, "ifdef depth: %d\n", depth);
#endif

    exitstat = 2;
    return depth > 1 ? IEOF_ERR : END_ERR;
}
Commit	Line	Data
ba2c33c2 KM	1	/* Copyright (c) 1982 Regents of the University of California */
	2
	3	static char sccsid[] = "@(#)unifdef.c 4.1 (Berkeley) %G%";
	4
	5	#ifdef COMMENT
	6
	7	unifdef - remove ifdef'ed lines
	8
	9	#endif
	10
	11	#include <stdio.h>
	12	#include <ctype.h>
	13	#define BSS
	14	FILE *input;
	15	#ifndef YES
	16	#define YES 1
	17	#define NO 0
	18	#endif
	19
	20	char *progname BSS;
	21	char *filename BSS;
	22	char text BSS; /* -t option in effect: this is a text file */
	23	char lnblank BSS; /* -l option in effect: blank deleted lines */
	24	char complement BSS; /* -c option in effect: complement the operation */
	25	#define MAXSYMS 100
	26	char true[MAXSYMS] BSS;
	27	char ignore[MAXSYMS] BSS;
	28	char *sym[MAXSYMS] BSS;
	29	char insym[MAXSYMS] BSS;
	30	char nsyms BSS;
	31	char incomment BSS;
	32	#define QUOTE1 0
	33	#define QUOTE2 1
	34	char inquote[2] BSS;
	35	int exitstat BSS;
	36	char *skipcomment ();
	37	char *skipquote ();
	38
	39	main (argc, argv)
	40	int argc;
	41	char **argv;
	42	{
	43	char **curarg;
	44	register char *cp;
	45	register char *cp1;
	46	char ignorethis;
	47
	48	progname = argv[0][0] ? argv[0] : "unifdef";
	49
	50	for (curarg = &argv[1]; --argc > 0; curarg++) {
	51	if ((cp1 = cp = curarg) != '-')
	52	break;
	53	if (*++cp1 == 'i') {
	54	ignorethis = YES;
	55	cp1++;
	56	}
	57	else
	58	ignorethis = NO;
	59	if ( ( *cp1 == 'd'
	60	\|\| *cp1 == 'u'
	61	)
	62	&& cp1[1] != '\0'
	63	) {
	64	if (nsyms >= MAXSYMS) {
65	prname ();
66	fprintf (stderr, "too many symbols.\n");
67	exit (2);
68	}
69	ignore[nsyms] = ignorethis;
70	true[nsyms] = *cp1 == 'd' ? YES : NO;
71	sym[nsyms++] = &cp1[1];
72	}
73	else if (ignorethis)
74	goto unrec;
75	else if (strcmp (&cp[1], "t") == 0)
76	text = YES;
77	else if (strcmp (&cp[1], "l") == 0)
78	lnblank = YES;
79	else if (strcmp (&cp[1], "c") == 0)
80	complement = YES;
81	else {
82	unrec:
83	prname ();
84	fprintf (stderr, "unrecognized option: %s\n", cp);
85	goto usage;
86	}
87	}
88	if (nsyms == 0) {
89	usage:
90	fprintf (stderr, "\
91	Usage: %s [-l] [-t] [-c] [[-dsym] [-usym] [-idsym] [-iusym]]... [file]\n\
92	At least one arg from [-d -u -id -iu] is required\n", progname);
93	exit (2);
94	}
95
96	if (argc > 1) {
97	prname ();
98	fprintf (stderr, "can only do one file.\n");
99	}
100	else if (argc == 1) {
101	filename = *curarg;
102	if ((input = fopen (filename, "r")) != NULL) {
103	pfile();
104	fclose (input);
105	}
106	else {
107	prname ();
108	fprintf (stderr, "can't open %s\n", *curarg);
109	}
110	}
111	else {
112	filename = "[stdin]";
113	input = stdin;
114	pfile();
115	}
116
117	fflush (stdout);
118	exit (exitstat);
119	}
120
121	/* types of input lines: */
122	#define PLAIN 0 /* ordinary line */
123	#define TRUE 1 /* a true #ifdef of a symbol known to us */
124	#define FALSE 2 /* a false #ifdef of a symbol known to us */
125	#define OTHER 3 /* an #ifdef of a symbol not known to us */
126	#define ELSE 4 /* #else */
127	#define ENDIF 5 /* #endif */
128	#define LEOF 6 /* end of file */
129
130	char reject BSS; /* 0 or 1: pass thru; 1 or 2: ignore comments */
131	int linenum BSS; /* current line number */
132	int stqcline BSS; /* start of current coment or quote */
133	char *errs[] = {
134	#define NO_ERR 0
135	"",
136	#define END_ERR 1
137	"",
138	#define ELSE_ERR 2
139	"Inappropriate else",
140	#define ENDIF_ERR 3
141	"Inappropriate endif",
142	#define IEOF_ERR 4
143	"Premature EOF in ifdef",
144	#define CEOF_ERR 5
145	"Premature EOF in comment",
146	#define Q1EOF_ERR 6
147	"Premature EOF in quoted character",
148	#define Q2EOF_ERR 7
149	"Premature EOF in quoted string"
150	};
151
152	pfile ()
153	{
154	reject = 0;
155	doif (-1, NO, reject, 0);
156	return;
157	}
158
159	doif (thissym, inif, prevreject, depth)
160	register int thissym; /* index of the symbol who was last ifdef'ed */
161	int inif; /* YES or NO we are inside an ifdef */
162	int prevreject; /* previous value of reject */
163	int depth; /* depth of ifdef's */
164	{
165	register int lineval;
166	register int thisreject;
167	int doret; /* tmp return valud]e of doif */
168	int cursym; /* index of the symbol returned by checkline */
169	int stline; /* line number when called this time */
170
171	stline = linenum;
172	for (;;) {
173	switch (lineval = checkline (&cursym)) {
174	case PLAIN:
175	flushline (YES);
176	break;
177
178	case TRUE:
179	case FALSE:
180	thisreject = reject;
181	if (lineval == TRUE)
182	insym[cursym] = 1;
183	else {
184	if (reject < 2)
185	reject = ignore[cursym] ? 1 : 2;
186	insym[cursym] = -1;
187	}
188	if (ignore[cursym])
189	flushline (YES);
190	else {
191	exitstat = 1;
192	flushline (NO);
193	}
194	if ((doret = doif (cursym, YES, thisreject, depth + 1)) != NO_ERR)
195	return error (doret, stline, depth);
196	break;
197
198	case OTHER:
199	flushline (YES);
200	if ((doret = doif (-1, YES, reject, depth + 1)) != NO_ERR)
201	return error (doret, stline, depth);
202	break;
203
204	case ELSE:
205	if (inif != 1)
206	return error (ELSE_ERR, linenum, depth);
207	inif = 2;
208	if (thissym >= 0) {
209	if ((insym[thissym] = -insym[thissym]) < 0)
210	reject = ignore[thissym] ? 1 : 2;
211	else
212	reject = prevreject;
213	if (!ignore[thissym]) {
214	flushline (NO);
215	break;
216	}
217	}
218	flushline (YES);
219	break;
220
221	case ENDIF:
222	if (inif == 0)
223	return error (ENDIF_ERR, linenum, depth);
224	if (thissym >= 0) {
225	insym[thissym] = 0;
226	reject = prevreject;
227	if (!ignore[thissym]) {
228	flushline (NO);
229	return NO_ERR;
230	}
231	}
232	flushline (YES);
233	return NO_ERR;
234
235	case LEOF: {
236	int err;
237	err = incomment
238	? CEOF_ERR
239	: inquote[QUOTE1]
240	? Q1EOF_ERR
241	: inquote[QUOTE2]
242	? Q2EOF_ERR
243	: NO_ERR;
244	if (inif) {
245	if (err != NO_ERR)
246	error (err, stqcline, depth);
247	return error (IEOF_ERR, stline, depth);
248	}
249	else if (err != NO_ERR)
250	return error (err, stqcline, depth);
251	else
252	return NO_ERR;
253	}
254	}
255	}
256	}
257
258	#define endsym(c) (!isalpha (c) && !isdigit (c) && c != '_')
259
260	#define MAXLINE 256
261	char tline[MAXLINE] BSS;
262
263	checkline (cursym)
264	int *cursym;
265	{
266	register char *cp;
267	register char *symp;
268	register char chr;
269	char *scp;
270	int retval;
271	int symind;
272	# define KWSIZE 8
273	char keyword[KWSIZE];
274
275	linenum++;
276	if (getlin (tline, sizeof tline, input, NO) == EOF)
277	return LEOF;
278
279	retval = PLAIN;
280	if ( *(cp = tline) != '#'
281	\|\| incomment
282	\|\| inquote[QUOTE1]
283	\|\| inquote[QUOTE2]
284	)
285	goto eol;
286
287	cp = skipcomment (++cp);
288	symp = keyword;
289	while (!endsym (*cp)) {
290	symp = cp++;
291	if (++symp >= &keyword[KWSIZE])
292	goto eol;
293	}
294	*symp = '\0';
295
296	if (strcmp (keyword, "ifdef") == 0) {
297	retval = YES;
298	goto ifdef;
299	}
300	else if (strcmp (keyword, "ifndef") == 0) {
301	retval = NO;
302	ifdef:
303	scp = cp = skipcomment (++cp);
304	if (incomment) {
305	retval = PLAIN;
306	goto eol;
307	}
308	for (symind = 0; ; ) {
309	if (insym[symind] == 0) {
310	for ( symp = sym[symind], cp = scp
311	; symp && cp == *symp
312	; cp++, symp++
313	)
314	{}
315	chr = *cp;
316	if (*symp == '\0' && endsym (chr)) {
317	*cursym = symind;
318	retval = (retval ^ true[symind]) ? FALSE : TRUE;
319	break;
320	}
321	}
322	if (++symind >= nsyms) {
323	retval = OTHER;
324	break;
325	}
326	}
327	}
328	else if (strcmp (keyword, "if") == 0)
329	retval = OTHER;
330	else if (strcmp (keyword, "else") == 0)
331	retval = ELSE;
332	else if (strcmp (keyword, "endif") == 0)
333	retval = ENDIF;
334
335	eol:
336	if (!text && !reject)
337	for (; *cp; ) {
338	if (incomment)
339	cp = skipcomment (cp);
340	else if (inquote[QUOTE1])
341	cp = skipquote (cp, QUOTE1);
342	else if (inquote[QUOTE2])
343	cp = skipquote (cp, QUOTE2);
344	else if (cp == '/' && cp[1] == '')
345	cp = skipcomment (cp);
346	else if (*cp == '\'')
347	cp = skipquote (cp, QUOTE1);
348	else if (*cp == '"')
349	cp = skipquote (cp, QUOTE2);
350	else
351	cp++;
352	}
353	return retval;
354	}
355
356	/* Skip over comments and stop at the next charaacter
357	/* position that is not whitespace.
358	/**/
359	char *
360	skipcomment (cp)
361	register char *cp;
362	{
363	if (incomment)
364	goto inside;
365	for (;; cp++) {
366	while (cp == ' ' \|\| cp == '\t')
367	cp++;
368	if (text)
369	return cp;
370	if ( cp[0] != '/'
371	\|\| cp[1] != '*'
372	)
373	return cp;
374	cp += 2;
375	if (!incomment) {
376	incomment = YES;
377	stqcline = linenum;
378	}
379	inside:
380	for (;;) {
381	for (; cp != ''; cp++)
382	if (*cp == '\0')
383	return cp;
384	if (*++cp == '/')
385	break;
386	}
387	incomment = NO;
388	}
389	}
390
391	/* Skip over a quoted string or character and stop at the next charaacter
392	/* position that is not whitespace.
393	/**/
394	char *
395	skipquote (cp, type)
396	register char *cp;
397	register int type;
398	{
399	register char qchar;
400
401	qchar = type == QUOTE1 ? '\'' : '"';
402
403	if (inquote[type])
404	goto inside;
405	for (;; cp++) {
406	if (*cp != qchar)
407	return cp;
408	cp++;
409	if (!inquote[type]) {
410	inquote[type] = YES;
411	stqcline = linenum;
412	}
413	inside:
414	for (; ; cp++) {
415	if (*cp == qchar)
416	break;
417	if ( *cp == '\0'
418	\|\| *cp == '\\'
419	&& *++cp == '\0'
420	)
421	return cp;
422	}
423	inquote[type] = NO;
424	}
425	}
426
427	/*
428	/* special getlin - treats form-feed as an end-of-line
429	/* and expands tabs if asked for
430	/*
431	/**/
432	getlin (line, maxline, inp, expandtabs)
433	register char *line;
434	int maxline;
435	FILE *inp;
436	int expandtabs;
437	{
438	int tmp;
439	register int num;
440	register int chr;
441	#ifdef FFSPECIAL
442	static char havechar = NO; /* have leftover char from last time */
443	static char svchar BSS;
444	#endif
445
446	num = 0;
447	#ifdef FFSPECIAL
448	if (havechar) {
449	havechar = NO;
450	chr = svchar;
451	goto ent;
452	}
453	#endif
454	while (num + 8 < maxline) { /* leave room for tab */
455	chr = getc (inp);
456	if (isprint (chr)) {
457	#ifdef FFSPECIAL
458	ent:
459	#endif
460	*line++ = chr;
461	num++;
462	}
463	else
464	switch (chr) {
465	case EOF:
466	return EOF;
467
468	case '\t':
469	if (expandtabs) {
470	num += tmp = 8 - (num & 7);
471	do
472	*line++ = ' ';
473	while (--tmp);
474	break;
475	}
476	default:
477	*line++ = chr;
478	num++;
479	break;
480
481	case '\n':
482	*line = '\n';
483	num++;
484	goto end;
485
486	#ifdef FFSPECIAL
487	case '\f':
488	if (++num == 1)
489	*line = '\f';
490	else {
491	*line = '\n';
492	havechar = YES;
493	svchar = chr;
494	}
495	goto end;
496	#endif
497	}
498	}
499	end:
500	*++line = '\0';
501	return num;
502	}
503
504	flushline (keep)
505	{
506	if ((keep && reject < 2) ^ complement)
507	putlin (tline, stdout);
508	else if (lnblank)
509	putlin ("\n", stdout);
510	return;
511	}
512
513	/*
514	/* putlin - for tools
515	/*
516	/**/
517	putlin (line, fio)
518	register char *line;
519	register FILE *fio;
520	{
521	register char chr;
522
523	while (chr = *line++)
524	putc (chr, fio);
525	return;
526	}
527
528	prname ()
529	{
530	fprintf (stderr, "%s: ", progname);
531	return;
532	}
533
534
535	error (err, line, depth)
536	{
537	if (err == END_ERR)
538	return err;
539
540	prname ();
541
542	#ifndef TESTING
543	fprintf (stderr, "Error in %s line %d: %s.\n",
544	filename, line, errs[err]);
545	#endif
546
547	#ifdef TESTING
548	fprintf (stderr, "Error in %s line %d: %s. ",
549	filename, line, errs[err]);
550	fprintf (stderr, "ifdef depth: %d\n", depth);
551	#endif
552
553	exitstat = 2;
554	return depth > 1 ? IEOF_ERR : END_ERR;
555	}