[unix-history] / usr / src / usr.sbin / amd / fsinfo / fsi_lex.l

%{
/*
 * Copyright (c) 1989 Jan-Simon Pendry
 * Copyright (c) 1989 Imperial College of Science, Technology & Medicine
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Jan-Simon Pendry at Imperial College, London.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)fsi_lex.l	5.3 (Berkeley) %G%
 *
 * $Id: fsi_lex.l,v 5.2.1.3 91/05/07 22:19:03 jsp Alpha $
 *
 */

/*
 * Lexical analyzer for fsinfo.
 * TODO: Needs rewriting.
 */

static int xinput();
static void xunput();

#ifdef FLEX_SCANNER
static int yylineno;
/* Flex support with help from Vern Paxson <vern@helios.ee.lbl.gov> */
#undef YY_INPUT
#define YY_INPUT(buf,result,max_size)		\
{						\
	int i;					\
	for (i = 0; i < max_size; i++) {	\
		int ch = xinput(i == 0);	\
		if (ch == 0)			\
			break;			\
		buf[i] = ch;			\
	}					\
	result = i;				\
}

#define	INIT_STATE {				\
		switch ((yy_start - 1) / 2) {	\
		case 0:				\
			BEGIN F;		\
			break;			\
		}				\
}


#else
/*
 * Using old lex...
 */
#undef unput
#define unput(ch) xunput(ch)
#undef input
#define input() xinput(1)

#define	INIT_STATE {				\
		switch (yybgin - yysvec - 1) {	\
		case 0:				\
			BEGIN F;		\
			break;			\
		}				\
}

#endif /* FLEX_SCANNER */

#include "../fsinfo/fsinfo.h"
#include "fsi_gram.h"
#include <ctype.h>

static char *filename;
static char *optr;
static char ostr[1024];
static find_resword();
static unsigned char ibuf[64];
static unsigned char *iptr = ibuf;
static int quoted;
static int lastch, nextch = '\n';
YYSTYPE yylval;

struct r {
	char *rw;
	int tok;
} rr[] = {
	{ "->", tEQ },
	{ "arch", tARCH },
	{ "as", tAS },
	{ "automount", tAUTOMOUNT },
	{ "cluster", tCLUSTER },
	{ "config", tCONFIG },
	{ "dumpset", tDUMPSET },
	{ "exportfs", tEXPORTFS },
	{ "freq", tFREQ },
	{ "from", tFROM },
	{ "fs", tFS },
	{ "fstype", tFSTYPE },
	{ "host", tHOST },
	{ "hwaddr", tHWADDR },
	{ "inaddr", tINADDR },
	{ "localhost", tLOCALHOST },
	{ "log", tLOG },
	{ "mount", tMOUNT },
	{ "netif", tNETIF },
	{ "netmask", tNETMASK },
	{ "opts", tOPTS },
	{ "os", tOS },
	{ "passno", tPASSNO },
	{ "sel", tSEL },
	{ "volname", tVOLNAME },
	{ 0, 0 },
};
#define	NRES_WORDS (sizeof(rr)/sizeof(rr[0])-1)

%}

%start F Q

%%
		INIT_STATE; /* witchcraft */

<F>[^ \t\n"={}]+	{ return find_resword(yytext); }
<F>[ \t]		;
<F>"\n"			{ yylineno++; }
<F>[={}]		{ return *yytext; }

<F>\"			{ BEGIN Q; optr = ostr; quoted = 1; }
<Q>\n			{ yylineno++; yyerror("\" expected"); BEGIN F; }
<Q>\\b			{ *optr++ = '\b'; /* escape */ }
<Q>\\t			{ *optr++ = '\t'; /* escape */ }
<Q>\\\"			{ *optr++ = '\"'; /* escape */ }
<Q>\\\\			{ *optr++ = '\\'; /* escape */ }
<Q>\\\n			{ yylineno++; /* continue */ }
<Q>\\r			{ *optr++ = '\r'; /* escape */ }
<Q>\\n			{ *optr++ = '\n'; /* escape */ }
<Q>\\f			{ *optr++ = '\f'; /* escape */ }
<Q>\\.			{ yyerror("Unknown \\ sequence"); }
<Q>([ \t]|"\\\n"){2,}	{ char *p = yytext-1; while (p = strchr(p+1, '\n')) yylineno++; }
<Q>"\\ "		{ *optr++ = ' '; /* force space */ }
<Q>\"			{ BEGIN F; quoted = 0;
				*optr = '\0';
				yylval.s = strdup(ostr);
				return tSTR;
			}
<Q>.			{ *optr++ = *yytext; }

%%

static int find_resword(s)
char *s;
{
	int tok = 0;

	int l = 0, m = NRES_WORDS/2, h = NRES_WORDS-1;
	int rc = 0;
	
	m = NRES_WORDS/2;

#define FSTRCMP(p, q) ((*(p) == *(q)) ? strcmp((p)+1, (q)+1) : *(p) - *(q))

	while ((l <= h) && (rc = FSTRCMP(s, rr[m].rw))) {
		/*fprintf(stderr, "failed to cmp(%s, %s), %d, %d, %d\n", s, rr[m].rw, l, m, h);*/
		if (rc < 0)
			h = m - 1;
		else
			l = m + 1;
		m = (h + l) / 2;
	}

	if (rc == 0)
		tok = rr[m].tok;

	switch (tok) {
	case tLOCALHOST:
		s = "${host}";
		/* fall through... */
	case 0:
		yylval.s = strdup(s);
		tok = tSTR;
		/* fall through... */
	default:
		return tok;
	}

}

int yyerror(s, s1, s2, s3, s4)
char *s;
char *s1, *s2, *s3, *s4;
{
	col_cleanup(0);
	fprintf(stderr, "%s:%d: ", filename ? filename : "/dev/stdin", yylineno);
	fprintf(stderr, s, s1, s2, s3, s4);
	fputc('\n', stderr);
	parse_errors++;
}

ioloc *current_location()
{
	ioloc *ip = ALLOC(ioloc);
	ip->i_line = yylineno;
	ip->i_file = filename;
	return ip;
}

#ifdef FLEX_SCANNER
#undef yywrap
#endif

int yywrap()
{
static int first = 1;
	if (first) {
		char prog[16*1024];
		strcpy(prog, "for file in ");
		while (*++g_argv) {
			if (access(*g_argv, 4) < 0) {
				error("\"%s\": Cannot open for reading", *g_argv);
				file_io_errors++;
			} else {
				strcat(prog, *g_argv);
				strcat(prog, " ");
			}
		}
		strcat(prog, "; do /lib/cpp ");
		strcat(prog, idvbuf);
		strcat(prog, " -DHOSTNAME=\'");
		strcat(prog, hostname);
		strcat(prog, "\' \"$file\"; done");
		yyin = popen(prog, "r");
		if (yyin) {
			/*if (filename) free(filename);*/
			filename = strdup("unknown");
			yylineno = 1;
			first = 0;
			return 0;
		} else {
			perror(prog);
		}
	}

	if (!first && yyin && pclose(yyin) != 0)
		parse_errors++;

	return 1;
}

#define xgetc(fp) ((iptr > ibuf) ? (*--iptr) : (lastch = nextch, nextch = getc(fp), (nextch == EOF ? nextch = lastch, EOF : nextch)))

static int xinput(need)
int need;
{
static int c_comment = 0;
	int ch, ch2;

	do {
		ch = xgetc(yyin);
		/* fprintf(stderr, "ch = %c, %#x, %d\n", ch, ibuf,iptr-ibuf); */
		if (ch == EOF) return 0;
		if (quoted)
			return ch;
		if (c_comment) {
			ch2 = ch;
			do {
				if (ch2 == '\n') {
					nextch = '\n';
					return ch2;
				}
				/* C style comment */
				do {
					ch2 = getc(yyin);
					if (ch2 == '\n') {
						nextch = '\n';
						return ch2;
					}
				} while (ch2 != '*' && ch2 != EOF);

				while (ch2 == '*')
					ch2 = getc(yyin);
			} while (ch2 != '/' && ch2 != EOF);
			c_comment = 0;
			if (ch2 == EOF)
				break;
			continue;
		}

		if (ch == '#') {
			/*log("lastch = '%c' (%#x)", lastch, lastch);*/
			if (lastch == '\n') {
				char fname[MAXPATHLEN];
				char *fptr;
				if (!need) {
					xunput('#');
					nextch = '\n';
					return 0;
				}
				fname[0] = '\0';
				/* Skip past space */
				do {
					ch2 = getc(yyin);
				} while (ch2 != EOF && ch2 != '\n' && !isdigit(ch2));
				if (isdigit(ch2)) {
					/* Read in line number */
					fptr = fname;
					do {
						*fptr++ = ch2;
						ch2 = getc(yyin);
					} while (isdigit(ch2));
					*fptr = '\0';
					if (fptr != fname)
						yylineno = atoi(fname) - 1;
				}
				/* Skip past space */
				while (ch2 != EOF && ch2 != '\"' && ch2 != '\n')
					ch2 = getc(yyin);
				if (ch2 == '\"') {
					/* Read file name */
					fptr = fname;
					ch2 = getc(yyin);
					while (ch2 != '\"' && ch2 != EOF && ch2 != EOF) {
						*fptr++ = ch2;
						ch2 = getc(yyin);
					}
					*fptr = '\0';
					if (fname[0]) {
						log("Setting filename to \"%s\"", fname);
						/*if (filename) free(filename);*/
						filename = strdup(fname);
					}
				}
				while (ch2 != '\n' && ch2 != EOF)
					ch2 = getc(yyin);
			} else do {
				ch2 = getc(yyin);
			} while (ch2 != '\n' && ch2 != EOF);
			if (ch2 == '\n') {
				nextch = '\n';
				return ch2;
			}
		} else if (ch == '/') {
			ch2 = getc(yyin);
			if (ch2 == '/') {
				/* C++ style comment */
				do {
					ch2 = getc(yyin);
				} while (ch2 != '\n' && ch2 != EOF);
				if (ch2 == '\n') {
					nextch = '\n';
					return ch2;
				}
			} else if (ch2 == '*') {
				c_comment = 1;
				continue;
			} else {
				xunput(ch2);
				return ch;
			}
		} else {
			return ch;
		}
	} while (ch2 != EOF);
	error("End of file within comment");
	return 0;
}

static void xunput(c)
int c;
{
	if (c && c != EOF) {
		if (iptr == ibuf + sizeof(ibuf) - 1)
		 	fatal("Out of space in lexical pushback");
		*iptr++ = c;
	}
}
Commit	Line	Data
04e42ac7 JSP	1	%{
04e42ac7 JSP	2	/*
04e42ac7 JSP	3	* Copyright (c) 1989 Jan-Simon Pendry
	4	* Copyright (c) 1989 Imperial College of Science, Technology & Medicine
	5	* Copyright (c) 1989 The Regents of the University of California.
	6	* All rights reserved.
	7	*
	8	* This code is derived from software contributed to Berkeley by
	9	* Jan-Simon Pendry at Imperial College, London.
	10	*
2f619045	11	* %sccs.include.redist.c%
04e42ac7	12	*
8d2991d5 JSP	13	* @(#)fsi_lex.l 5.3 (Berkeley) %G%
	14	*
	15	* $Id: fsi_lex.l,v 5.2.1.3 91/05/07 22:19:03 jsp Alpha $
	16	*
04e42ac7 JSP	17	*/
	18
	19	/*
	20	* Lexical analyzer for fsinfo.
	21	* TODO: Needs rewriting.
	22	*/
	23
	24	static int xinput();
	25	static void xunput();
	26
	27	#ifdef FLEX_SCANNER
	28	static int yylineno;
	29	/* Flex support with help from Vern Paxson <vern@helios.ee.lbl.gov> */
	30	#undef YY_INPUT
	31	#define YY_INPUT(buf,result,max_size) \
	32	{ \
	33	int i; \
	34	for (i = 0; i < max_size; i++) { \
	35	int ch = xinput(i == 0); \
	36	if (ch == 0) \
	37	break; \
	38	buf[i] = ch; \
	39	} \
	40	result = i; \
	41	}
	42
	43	#define INIT_STATE { \
	44	switch ((yy_start - 1) / 2) { \
	45	case 0: \
	46	BEGIN F; \
	47	break; \
	48	} \
	49	}
	50
	51
	52	#else
	53	/*
	54	* Using old lex...
	55	*/
	56	#undef unput
	57	#define unput(ch) xunput(ch)
	58	#undef input
	59	#define input() xinput(1)
	60
	61	#define INIT_STATE { \
	62	switch (yybgin - yysvec - 1) { \
	63	case 0: \
	64	BEGIN F; \
	65	break; \
	66	} \
	67	}
	68
	69	#endif /* FLEX_SCANNER */
	70
	71	#include "../fsinfo/fsinfo.h"
	72	#include "fsi_gram.h"
	73	#include <ctype.h>
	74
	75	static char *filename;
	76	static char *optr;
	77	static char ostr[1024];
	78	static find_resword();
	79	static unsigned char ibuf[64];
	80	static unsigned char *iptr = ibuf;
81	static int quoted;
82	static int lastch, nextch = '\n';
83	YYSTYPE yylval;
84
85	struct r {
86	char *rw;
87	int tok;
88	} rr[] = {
89	{ "->", tEQ },
90	{ "arch", tARCH },
91	{ "as", tAS },
92	{ "automount", tAUTOMOUNT },
93	{ "cluster", tCLUSTER },
94	{ "config", tCONFIG },
95	{ "dumpset", tDUMPSET },
96	{ "exportfs", tEXPORTFS },
97	{ "freq", tFREQ },
98	{ "from", tFROM },
99	{ "fs", tFS },
100	{ "fstype", tFSTYPE },
101	{ "host", tHOST },
102	{ "hwaddr", tHWADDR },
103	{ "inaddr", tINADDR },
104	{ "localhost", tLOCALHOST },
105	{ "log", tLOG },
106	{ "mount", tMOUNT },
107	{ "netif", tNETIF },
108	{ "netmask", tNETMASK },
109	{ "opts", tOPTS },
110	{ "os", tOS },
111	{ "passno", tPASSNO },
112	{ "sel", tSEL },
113	{ "volname", tVOLNAME },
114	{ 0, 0 },
115	};
116	#define NRES_WORDS (sizeof(rr)/sizeof(rr[0])-1)
117
118	%}
119
120	%start F Q
121
122	%%
123	INIT_STATE; /* witchcraft */
124
125	<F>[^ \t\n"={}]+ { return find_resword(yytext); }
126	<F>[ \t] ;
127	<F>"\n" { yylineno++; }
128	<F>[={}] { return *yytext; }
129
130	<F>\" { BEGIN Q; optr = ostr; quoted = 1; }
131	<Q>\n { yylineno++; yyerror("\" expected"); BEGIN F; }
132	<Q>\\b { optr++ = '\b'; / escape */ }
133	<Q>\\t { optr++ = '\t'; / escape */ }
134	<Q>\\\" { optr++ = '\"'; / escape */ }
135	<Q>\\\\ { optr++ = '\\'; / escape */ }
136	<Q>\\\n { yylineno++; /* continue */ }
137	<Q>\\r { optr++ = '\r'; / escape */ }
138	<Q>\\n { optr++ = '\n'; / escape */ }
139	<Q>\\f { optr++ = '\f'; / escape */ }
140	<Q>\\. { yyerror("Unknown \\ sequence"); }
141	<Q>([ \t]\|"\\\n"){2,} { char *p = yytext-1; while (p = strchr(p+1, '\n')) yylineno++; }
142	<Q>"\\ " { optr++ = ' '; / force space */ }
143	<Q>\" { BEGIN F; quoted = 0;
144	*optr = '\0';
145	yylval.s = strdup(ostr);
146	return tSTR;
147	}
148	<Q>. { optr++ = yytext; }
149
150	%%
151
152	static int find_resword(s)
153	char *s;
154	{
155	int tok = 0;
156
157	int l = 0, m = NRES_WORDS/2, h = NRES_WORDS-1;
158	int rc = 0;
159
160	m = NRES_WORDS/2;
161
162	#define FSTRCMP(p, q) (((p) == (q)) ? strcmp((p)+1, (q)+1) : (p) - (q))
163
164	while ((l <= h) && (rc = FSTRCMP(s, rr[m].rw))) {
165	/fprintf(stderr, "failed to cmp(%s, %s), %d, %d, %d\n", s, rr[m].rw, l, m, h);/
166	if (rc < 0)
167	h = m - 1;
168	else
169	l = m + 1;
170	m = (h + l) / 2;
171	}
172
173	if (rc == 0)
174	tok = rr[m].tok;
175
176	switch (tok) {
177	case tLOCALHOST:
178	s = "${host}";
179	/* fall through... */
180	case 0:
181	yylval.s = strdup(s);
182	tok = tSTR;
183	/* fall through... */
184	default:
185	return tok;
186	}
187
188	}
189
190	int yyerror(s, s1, s2, s3, s4)
191	char *s;
192	char s1, s2, s3, s4;
193	{
194	col_cleanup(0);
195	fprintf(stderr, "%s:%d: ", filename ? filename : "/dev/stdin", yylineno);
196	fprintf(stderr, s, s1, s2, s3, s4);
197	fputc('\n', stderr);
198	parse_errors++;
199	}
200
201	ioloc *current_location()
202	{
203	ioloc *ip = ALLOC(ioloc);
204	ip->i_line = yylineno;
205	ip->i_file = filename;
206	return ip;
207	}
208
209	#ifdef FLEX_SCANNER
210	#undef yywrap
211	#endif
212
213	int yywrap()
214	{
215	static int first = 1;
216	if (first) {
217	char prog[16*1024];
218	strcpy(prog, "for file in ");
219	while (*++g_argv) {
220	if (access(*g_argv, 4) < 0) {
221	error("\"%s\": Cannot open for reading", *g_argv);
222	file_io_errors++;
223	} else {
224	strcat(prog, *g_argv);
225	strcat(prog, " ");
226	}
227	}
228	strcat(prog, "; do /lib/cpp ");
229	strcat(prog, idvbuf);
230	strcat(prog, " -DHOSTNAME=\'");
231	strcat(prog, hostname);
232	strcat(prog, "\' \"$file\"; done");
233	yyin = popen(prog, "r");
234	if (yyin) {
235	/if (filename) free(filename);/
236	filename = strdup("unknown");
237	yylineno = 1;
238	first = 0;
239	return 0;
240	} else {
241	perror(prog);
242	}
243	}
244
245	if (!first && yyin && pclose(yyin) != 0)
246	parse_errors++;
247
248	return 1;
249	}
250
251	#define xgetc(fp) ((iptr > ibuf) ? (*--iptr) : (lastch = nextch, nextch = getc(fp), (nextch == EOF ? nextch = lastch, EOF : nextch)))
252
253	static int xinput(need)
254	int need;
255	{
256	static int c_comment = 0;
257	int ch, ch2;
258
259	do {
260	ch = xgetc(yyin);
261	/* fprintf(stderr, "ch = %c, %#x, %d\n", ch, ibuf,iptr-ibuf); */
262	if (ch == EOF) return 0;
263	if (quoted)
264	return ch;
265	if (c_comment) {
266	ch2 = ch;
267	do {
268	if (ch2 == '\n') {
269	nextch = '\n';
270	return ch2;
271	}
272	/* C style comment */
273	do {
274	ch2 = getc(yyin);
275	if (ch2 == '\n') {
276	nextch = '\n';
277	return ch2;
278	}
279	} while (ch2 != '*' && ch2 != EOF);
280
281	while (ch2 == '*')
282	ch2 = getc(yyin);
283	} while (ch2 != '/' && ch2 != EOF);
284	c_comment = 0;
285	if (ch2 == EOF)
286	break;
287	continue;
288	}
289
290	if (ch == '#') {
291	/log("lastch = '%c' (%#x)", lastch, lastch);/
292	if (lastch == '\n') {
293	char fname[MAXPATHLEN];
294	char *fptr;
295	if (!need) {
296	xunput('#');
297	nextch = '\n';
298	return 0;
299	}
300	fname[0] = '\0';
301	/* Skip past space */
302	do {
303	ch2 = getc(yyin);
304	} while (ch2 != EOF && ch2 != '\n' && !isdigit(ch2));
305	if (isdigit(ch2)) {
306	/* Read in line number */
307	fptr = fname;
308	do {
309	*fptr++ = ch2;
310	ch2 = getc(yyin);
311	} while (isdigit(ch2));
312	*fptr = '\0';
313	if (fptr != fname)
314	yylineno = atoi(fname) - 1;
315	}
316	/* Skip past space */
317	while (ch2 != EOF && ch2 != '\"' && ch2 != '\n')
318	ch2 = getc(yyin);
319	if (ch2 == '\"') {
320	/* Read file name */
321	fptr = fname;
322	ch2 = getc(yyin);
323	while (ch2 != '\"' && ch2 != EOF && ch2 != EOF) {
324	*fptr++ = ch2;
325	ch2 = getc(yyin);
326	}
327	*fptr = '\0';
328	if (fname[0]) {
329	log("Setting filename to \"%s\"", fname);
330	/if (filename) free(filename);/
331	filename = strdup(fname);
332	}
333	}
334	while (ch2 != '\n' && ch2 != EOF)
335	ch2 = getc(yyin);
336	} else do {
337	ch2 = getc(yyin);
338	} while (ch2 != '\n' && ch2 != EOF);
339	if (ch2 == '\n') {
340	nextch = '\n';
341	return ch2;
342	}
343	} else if (ch == '/') {
344	ch2 = getc(yyin);
345	if (ch2 == '/') {
346	/* C++ style comment */
347	do {
348	ch2 = getc(yyin);
349	} while (ch2 != '\n' && ch2 != EOF);
350	if (ch2 == '\n') {
351	nextch = '\n';
352	return ch2;
353	}
354	} else if (ch2 == '*') {
355	c_comment = 1;
356	continue;
357	} else {
358	xunput(ch2);
359	return ch;
360	}
361	} else {
362	return ch;
363	}
364	} while (ch2 != EOF);
365	error("End of file within comment");
366	return 0;
367	}
368
369	static void xunput(c)
370	int c;
371	{
372	if (c && c != EOF) {
373	if (iptr == ibuf + sizeof(ibuf) - 1)
374	fatal("Out of space in lexical pushback");
375	*iptr++ = c;
376	}
377	}