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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/mg/cscope.c	Lines:	0	261	0.0 %
Date:	2017-11-07	Branches:	0	152	0.0 %


/*	$OpenBSD: cscope.c,v 1.16 2016/01/19 14:51:00 sunil Exp $	*/

/*
 * This file is in the public domain.
 *
 * Author: Sunil Nimmagadda <sunil@openbsd.org>
 */

#include <sys/queue.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <fnmatch.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include "def.h"

#define CSSYMBOL      0
#define CSDEFINITION  1
#define CSCALLEDFUNCS 2
#define CSCALLERFUNCS 3
#define CSTEXT        4
#define CSEGREP       6
#define CSFINDFILE    7
#define CSINCLUDES    8

struct cstokens {
	const char *fname;
	const char *function;
	const char *lineno;
	const char *pattern;
};

struct csmatch {
	TAILQ_ENTRY(csmatch) entry;
	int lineno;
};

struct csrecord {
	TAILQ_ENTRY(csrecord) entry;
	char *filename;
	TAILQ_HEAD(matches, csmatch) matches;
};

static TAILQ_HEAD(csrecords, csrecord) csrecords = TAILQ_HEAD_INITIALIZER(csrecords);
static struct csrecord *addentryr;
static struct csrecord *currecord;
static struct csmatch  *curmatch;
static const char      *addentryfn;
static const char      *csprompt[] = {
	"Find this symbol: ",
	"Find this global definition: ",
	"Find functions called by this function: ",
	"Find functions calling this function: ",
	"Find this text string: ",
	"Change this text string: ",
	"Find this egrep pattern: ",
	"Find this file: ",
	"Find files #including this file: "
};

static int  addentry(struct buffer *, char *);
static void csflush(void);
static int  do_cscope(int);
static int  csexists(const char *);
static int  getattr(char *, struct cstokens *);
static int  jumptomatch(void);
static void prettyprint(struct buffer *, struct cstokens *);
static const char *ltrim(const char *);

/*
 * Find this symbol. Bound to C-c s s
 */
/* ARGSUSED */
int
cssymbol(int f, int n)
{
	return (do_cscope(CSSYMBOL));
}

/*
 * Find this global definition. Bound to C-c s d
 */
/* ARGSUSED */int
csdefinition(int f, int n)
{
	return (do_cscope(CSDEFINITION));
}

/*
 * Find functions called by this function. Bound to C-c s l
 */
/* ARGSUSED */
int
csfuncalled(int f, int n)
{
	return (do_cscope(CSCALLEDFUNCS));
}

/*
 * Find functions calling this function. Bound to C-c s c
 */
/* ARGSUSED */
int
cscallerfuncs(int f, int n)
{
	return (do_cscope(CSCALLERFUNCS));
}

/*
 * Find this text. Bound to C-c s t
 */
/* ARGSUSED */
int
csfindtext(int f, int n)
{
	return (do_cscope(CSTEXT));
}

/*
 * Find this egrep pattern. Bound to C-c s e
 */
/* ARGSUSED */
int
csegrep(int f, int n)
{
	return (do_cscope(CSEGREP));
}

/*
 * Find this file. Bound to C-c s f
 */
/* ARGSUSED */
int
csfindfile(int f, int n)
{
	return (do_cscope(CSFINDFILE));
}

/*
 * Find files #including this file. Bound to C-c s i
 */
/* ARGSUSED */
int
csfindinc(int f, int n)
{
	return (do_cscope(CSINCLUDES));
}

/*
 * Create list of files to index in the given directory
 * using cscope-indexer.
 */
/* ARGSUSED */
int
cscreatelist(int f, int n)
{
	struct buffer *bp;
	struct stat sb;
	FILE *fpipe;
	char dir[NFILEN], cmd[BUFSIZ], title[BUFSIZ], *line, *bufp;
	size_t len;
	int clen;

	if (getbufcwd(dir, sizeof(dir)) == FALSE)
		dir[0] = '\0';

	bufp = eread("Index files in directory: ", dir,
	    sizeof(dir), EFCR | EFDEF | EFNEW | EFNUL);

	if (bufp == NULL)
		return (ABORT);
	else if (bufp[0] == '\0')
		return (FALSE);

	if (stat(dir, &sb) == -1) {
		dobeep();
		ewprintf("stat: %s", strerror(errno));
		return (FALSE);
	} else if (S_ISDIR(sb.st_mode) == 0) {
		dobeep();
		ewprintf("%s: Not a directory", dir);
		return (FALSE);
	}

	if (csexists("cscope-indexer") == FALSE) {
		dobeep();
		ewprintf("no such file or directory, cscope-indexer");
		return (FALSE);
	}

	clen = snprintf(cmd, sizeof(cmd), "cscope-indexer -v %s", dir);
	if (clen < 0 || clen >= sizeof(cmd))
		return (FALSE);

	if ((fpipe = popen(cmd, "r")) == NULL) {
		dobeep();
		ewprintf("problem opening pipe");
		return (FALSE);
	}

	bp = bfind("*cscope*", TRUE);
	if (bclear(bp) != TRUE) {
		pclose(fpipe);
		return (FALSE);
	}
	bp->b_flag |= BFREADONLY;

	clen = snprintf(title, sizeof(title), "%s%s",
	    "Creating cscope file list 'cscope.files' in: ", dir);
	if (clen < 0 || clen >= sizeof(title)) {
		pclose(fpipe);
		return (FALSE);
	}
	addline(bp, title);
	addline(bp, "");
	/* All lines are NUL terminated */
	while ((line = fgetln(fpipe, &len)) != NULL) {
		line[len - 1] = '\0';
		addline(bp, line);
	}
	pclose(fpipe);
	return (popbuftop(bp, WNONE));
}

/*
 * Next Symbol. Bound to C-c s n
 */
/* ARGSUSED */
int
csnextmatch(int f, int n)
{
	struct csrecord *r;
	struct csmatch *m;

	if (curmatch == NULL) {
		if ((r = TAILQ_FIRST(&csrecords)) == NULL) {
			dobeep();
			ewprintf("The *cscope* buffer does not exist yet");
			return (FALSE);
		}
		currecord = r;
		curmatch = TAILQ_FIRST(&r->matches);
	} else {
		m = TAILQ_NEXT(curmatch, entry);
		if (m == NULL) {
			r = TAILQ_NEXT(currecord, entry);
			if (r == NULL) {
				dobeep();
				ewprintf("The end of *cscope* buffer has been"
				    " reached");
				return (FALSE);
			} else {
				currecord = r;
				curmatch = TAILQ_FIRST(&currecord->matches);
			}
		} else
			curmatch = m;
	}
	return (jumptomatch());
}

/*
 * Previous Symbol. Bound to C-c s p
 */
/* ARGSUSED */
int
csprevmatch(int f, int n)
{
	struct csmatch *m;
	struct csrecord *r;

	if (curmatch == NULL)
		return (FALSE);
	else {
		m  = TAILQ_PREV(curmatch, matches, entry);
		if (m)
			curmatch = m;
		else {
			r = TAILQ_PREV(currecord, csrecords, entry);
			if (r == NULL) {
				dobeep();
				ewprintf("The beginning of *cscope* buffer has"
				    " been reached");
				return (FALSE);
			} else {
				currecord = r;
				curmatch = TAILQ_LAST(&currecord->matches,
				    matches);
			}
		}
	}
	return (jumptomatch());
}

/*
 * Next file.
 */
int
csnextfile(int f, int n)
{
	struct csrecord *r;

	if (curmatch == NULL) {
		if ((r = TAILQ_FIRST(&csrecords)) == NULL) {
			dobeep();
			ewprintf("The *cscope* buffer does not exist yet");
			return (FALSE);
		}

	} else {
		if ((r = TAILQ_NEXT(currecord, entry)) == NULL) {
			dobeep();
			ewprintf("The end of *cscope* buffer has been reached");
			return (FALSE);
		}
	}
	currecord = r;
	curmatch = TAILQ_FIRST(&currecord->matches);
	return (jumptomatch());
}

/*
 * Previous file.
 */
int
csprevfile(int f, int n)
{
	struct csrecord *r;

	if (curmatch == NULL) {
		if ((r = TAILQ_FIRST(&csrecords)) == NULL) {
			dobeep();
			ewprintf("The *cscope* buffer does not exist yet");
			return (FALSE);
		}

	} else {
		if ((r = TAILQ_PREV(currecord, csrecords, entry)) == NULL) {
			dobeep();
			ewprintf("The beginning of *cscope* buffer has been"
			    " reached");
			return (FALSE);
		}
	}
	currecord = r;
	curmatch = TAILQ_FIRST(&currecord->matches);
	return (jumptomatch());
}

/*
 * The current symbol location is extracted from currecord->filename and
 * curmatch->lineno. Load the file similar to filevisit and goto the
 * lineno recorded.
 */
int
jumptomatch(void)
{
	struct buffer *bp;
	char *adjf;

	if (curmatch == NULL || currecord == NULL)
		return (FALSE);
	adjf = adjustname(currecord->filename, TRUE);
	if (adjf == NULL)
		return (FALSE);
	if ((bp = findbuffer(adjf)) == NULL)
		return (FALSE);
	curbp = bp;
	if (showbuffer(bp, curwp, WFFULL) != TRUE)
		return (FALSE);
	if (bp->b_fname[0] == '\0') {
		if (readin(adjf) != TRUE)
			killbuffer(bp);
	}
	gotoline(FFARG, curmatch->lineno);
	return (TRUE);
}

/*
 * Ask for the symbol, construct cscope commandline with the symbol
 * and passed in index. Popen cscope, read the output into *cscope*
 * buffer and pop it.
 */
int
do_cscope(int i)
{
	struct buffer *bp;
	FILE *fpipe;
	char pattern[MAX_TOKEN], cmd[BUFSIZ], title[BUFSIZ];
	char *p, *buf;
	int clen, nores = 0;
	size_t len;

	/* If current buffer isn't a source file just return */
	if (fnmatch("*.[chy]", curbp->b_fname, 0) != 0) {
		dobeep();
		ewprintf("C-c s not defined");
		return (FALSE);
	}

	if (curtoken(0, 1, pattern) == FALSE)
		return (FALSE);
	p = eread("%s", pattern, MAX_TOKEN, EFNEW | EFCR | EFDEF, csprompt[i]);
	if (p == NULL)
		return (ABORT);
	else if (p[0] == '\0')
		return (FALSE);

	if (csexists("cscope") == FALSE) {
		dobeep();
		ewprintf("no such file or directory, cscope");
		return (FALSE);
	}

	csflush();
	clen = snprintf(cmd, sizeof(cmd), "cscope -L -%d %s 2>/dev/null",
	    i, pattern);
	if (clen < 0 || clen >= sizeof(cmd))
		return (FALSE);

	if ((fpipe = popen(cmd, "r")) == NULL) {
		dobeep();
		ewprintf("problem opening pipe");
		return (FALSE);
	}

	bp = bfind("*cscope*", TRUE);
	if (bclear(bp) != TRUE) {
		pclose(fpipe);
		return (FALSE);
	}
	bp->b_flag |= BFREADONLY;

	clen = snprintf(title, sizeof(title), "%s%s", csprompt[i], pattern);
	if (clen < 0 || clen >= sizeof(title)) {
		pclose(fpipe);
		return (FALSE);
	}
	addline(bp, title);
	addline(bp, "");
	addline(bp, "-------------------------------------------------------------------------------");
	/* All lines are NUL terminated */
	while ((buf = fgetln(fpipe, &len)) != NULL) {
		buf[len - 1] = '\0';
		if (addentry(bp, buf) != TRUE)
			return (FALSE);
		nores = 1;
	};
	pclose(fpipe);
	addline(bp, "-------------------------------------------------------------------------------");
	if (nores == 0)
		ewprintf("No matches were found.");
	return (popbuftop(bp, WNONE));
}

/*
 * For each line read from cscope output, extract the tokens,
 * add them to list and pretty print a line in *cscope* buffer.
 */
int
addentry(struct buffer *bp, char *csline)
{
	struct csrecord *r;
	struct csmatch *m;
	struct cstokens t;
	int lineno;
	char buf[BUFSIZ];
	const char *errstr;

	r = NULL;
	if (getattr(csline, &t) == FALSE)
		return (FALSE);

	lineno = strtonum(t.lineno, INT_MIN, INT_MAX, &errstr);
	if (errstr)
		return (FALSE);

	if (addentryfn == NULL || strcmp(addentryfn, t.fname) != 0) {
		if ((r = malloc(sizeof(struct csrecord))) == NULL)
			return (FALSE);
		addentryr = r;
		if ((r->filename = strndup(t.fname, NFILEN)) == NULL)
			goto cleanup;
		addentryfn = r->filename;
		TAILQ_INIT(&r->matches);
		if ((m = malloc(sizeof(struct csmatch))) == NULL)
			goto cleanup;
		m->lineno = lineno;
		TAILQ_INSERT_TAIL(&r->matches, m, entry);
		TAILQ_INSERT_TAIL(&csrecords, r, entry);
		addline(bp, "");
		if (snprintf(buf, sizeof(buf), "*** %s", t.fname) < 0)
			goto cleanup;
		addline(bp, buf);
	} else {
		if ((m = malloc(sizeof(struct csmatch))) == NULL)
			goto cleanup;
		m->lineno = lineno;
		TAILQ_INSERT_TAIL(&addentryr->matches, m, entry);
	}
	prettyprint(bp, &t);
	return (TRUE);
cleanup:
	free(r);
	return (FALSE);
}

/*
 * Cscope line: <filename> <function> <lineno> <pattern>
 */
int
getattr(char *line, struct cstokens *t)
{
	char *p;

	if ((p = strchr(line, ' ')) == NULL)
		return (FALSE);
	*p++ = '\0';
	t->fname = line;
	line = p;

	if ((p = strchr(line, ' ')) == NULL)
		return (FALSE);
	*p++ = '\0';
	t->function = line;
	line = p;

	if ((p = strchr(line, ' ')) == NULL)
		return (FALSE);
	*p++ = '\0';
	t->lineno = line;

	if (*p == '\0')
		return (FALSE);
	t->pattern = p;

	return (TRUE);
}

void
prettyprint(struct buffer *bp, struct cstokens *t)
{
	char buf[BUFSIZ];

	if (snprintf(buf, sizeof(buf), "%s[%s]\t\t%s",
	    t->function, t->lineno, ltrim(t->pattern)) < 0)
		return;
	addline(bp, buf);
}

const char *
ltrim(const char *s)
{
	while (isblank((unsigned char)*s))
		s++;
	return s;
}

void
csflush(void)
{
	struct csrecord *r;
	struct csmatch *m;

	while ((r = TAILQ_FIRST(&csrecords)) != NULL) {
		free(r->filename);
		while ((m = TAILQ_FIRST(&r->matches)) != NULL) {
			TAILQ_REMOVE(&r->matches, m, entry);
			free(m);
		}
		TAILQ_REMOVE(&csrecords, r, entry);
		free(r);
	}
	addentryr = NULL;
	addentryfn = NULL;
	currecord = NULL;
	curmatch = NULL;
}

/*
 * Check if the cmd exists in $PATH. Split on ":" and iterate through
 * all paths in $PATH.
 */
int
csexists(const char *cmd)
{
	char fname[NFILEN], *dir, *path, *pathc, *tmp;
	int  len, dlen;

	/* Special case if prog contains '/' */
	if (strchr(cmd, '/')) {
		if (access(cmd, F_OK) == -1)
			return (FALSE);
		else
			return (TRUE);
	}
	if ((tmp = getenv("PATH")) == NULL)
		return (FALSE);
	if ((pathc = path = strndup(tmp, NFILEN)) == NULL) {
		dobeep();
		ewprintf("out of memory");
		return (FALSE);
	}
	while ((dir = strsep(&path, ":")) != NULL) {
		if (*dir == '\0')
			continue;

		dlen = strlen(dir);
		while (dlen > 0 && dir[dlen-1] == '/')
			dir[--dlen] = '\0';     /* strip trailing '/' */

		len = snprintf(fname, sizeof(fname), "%s/%s", dir, cmd);
		if (len == -1 || len >= sizeof(fname)) {
			dobeep();
			ewprintf("path too long");
			goto cleanup;
		}
		if(access(fname, F_OK) == 0) {
			free(pathc);
			return (TRUE);
		}
	}
cleanup:
	free(pathc);
	return (FALSE);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: cscope.c,v 1.16 2016/01/19 14:51:00 sunil Exp $ */
2
3			/*
4			* This file is in the public domain.
5			*
6			* Author: Sunil Nimmagadda <sunil@openbsd.org>
7			*/
8
9			#include <sys/queue.h>
10			#include <sys/stat.h>
11			#include <sys/types.h>
12			#include <ctype.h>
13			#include <errno.h>
14			#include <fcntl.h>
15			#include <fnmatch.h>
16			#include <limits.h>
17			#include <signal.h>
18			#include <stdio.h>
19			#include <stdlib.h>
20			#include <string.h>
21			#include <unistd.h>
22
23			#include "def.h"
24
25			#define CSSYMBOL 0
26			#define CSDEFINITION 1
27			#define CSCALLEDFUNCS 2
28			#define CSCALLERFUNCS 3
29			#define CSTEXT 4
30			#define CSEGREP 6
31			#define CSFINDFILE 7
32			#define CSINCLUDES 8
33
34			struct cstokens {
35			const char *fname;
36			const char *function;
37			const char *lineno;
38			const char *pattern;
39			};
40
41			struct csmatch {
42			TAILQ_ENTRY(csmatch) entry;
43			int lineno;
44			};
45
46			struct csrecord {
47			TAILQ_ENTRY(csrecord) entry;
48			char *filename;
49			TAILQ_HEAD(matches, csmatch) matches;
50			};
51
52			static TAILQ_HEAD(csrecords, csrecord) csrecords = TAILQ_HEAD_INITIALIZER(csrecords);
53			static struct csrecord *addentryr;
54			static struct csrecord *currecord;
55			static struct csmatch *curmatch;
56			static const char *addentryfn;
57			static const char *csprompt[] = {
58			"Find this symbol: ",
59			"Find this global definition: ",
60			"Find functions called by this function: ",
61			"Find functions calling this function: ",
62			"Find this text string: ",
63			"Change this text string: ",
64			"Find this egrep pattern: ",
65			"Find this file: ",
66			"Find files #including this file: "
67			};
68
69			static int addentry(struct buffer , char );
70			static void csflush(void);
71			static int do_cscope(int);
72			static int csexists(const char *);
73			static int getattr(char , struct cstokens );
74			static int jumptomatch(void);
75			static void prettyprint(struct buffer , struct cstokens );
76			static const char ltrim(const char );
77
78			/*
79			* Find this symbol. Bound to C-c s s
80			*/
81			/* ARGSUSED */
82			int
83			cssymbol(int f, int n)
84			{
85			return (do_cscope(CSSYMBOL));
86			}
87
88			/*
89			* Find this global definition. Bound to C-c s d
90			*/
91			/* ARGSUSED */int
92			csdefinition(int f, int n)
93			{
94			return (do_cscope(CSDEFINITION));
95			}
96
97			/*
98			* Find functions called by this function. Bound to C-c s l
99			*/
100			/* ARGSUSED */
101			int
102			csfuncalled(int f, int n)
103			{
104			return (do_cscope(CSCALLEDFUNCS));
105			}
106
107			/*
108			* Find functions calling this function. Bound to C-c s c
109			*/
110			/* ARGSUSED */
111			int
112			cscallerfuncs(int f, int n)
113			{
114			return (do_cscope(CSCALLERFUNCS));
115			}
116
117			/*
118			* Find this text. Bound to C-c s t
119			*/
120			/* ARGSUSED */
121			int
122			csfindtext(int f, int n)
123			{
124			return (do_cscope(CSTEXT));
125			}
126
127			/*
128			* Find this egrep pattern. Bound to C-c s e
129			*/
130			/* ARGSUSED */
131			int
132			csegrep(int f, int n)
133			{
134			return (do_cscope(CSEGREP));
135			}
136
137			/*
138			* Find this file. Bound to C-c s f
139			*/
140			/* ARGSUSED */
141			int
142			csfindfile(int f, int n)
143			{
144			return (do_cscope(CSFINDFILE));
145			}
146
147			/*
148			* Find files #including this file. Bound to C-c s i
149			*/
150			/* ARGSUSED */
151			int
152			csfindinc(int f, int n)
153			{
154			return (do_cscope(CSINCLUDES));
155			}
156
157			/*
158			* Create list of files to index in the given directory
159			* using cscope-indexer.
160			*/
161			/* ARGSUSED */
162			int
163			cscreatelist(int f, int n)
164			{
165			struct buffer *bp;
166			struct stat sb;
167			FILE *fpipe;
168			char dir[NFILEN], cmd[BUFSIZ], title[BUFSIZ], line, bufp;
169			size_t len;
170			int clen;
171
172			if (getbufcwd(dir, sizeof(dir)) == FALSE)
173			dir[0] = '\0';
174
175			bufp = eread("Index files in directory: ", dir,
176			sizeof(dir), EFCR \| EFDEF \| EFNEW \| EFNUL);
177
178			if (bufp == NULL)
179			return (ABORT);
180			else if (bufp[0] == '\0')
181			return (FALSE);
182
183			if (stat(dir, &sb) == -1) {
184			dobeep();
185			ewprintf("stat: %s", strerror(errno));
186			return (FALSE);
187			} else if (S_ISDIR(sb.st_mode) == 0) {
188			dobeep();
189			ewprintf("%s: Not a directory", dir);
190			return (FALSE);
191			}
192
193			if (csexists("cscope-indexer") == FALSE) {
194			dobeep();
195			ewprintf("no such file or directory, cscope-indexer");
196			return (FALSE);
197			}
198
199			clen = snprintf(cmd, sizeof(cmd), "cscope-indexer -v %s", dir);
200			if (clen < 0 \|\| clen >= sizeof(cmd))
201			return (FALSE);
202
203			if ((fpipe = popen(cmd, "r")) == NULL) {
204			dobeep();
205			ewprintf("problem opening pipe");
206			return (FALSE);
207			}
208
209			bp = bfind("cscope", TRUE);
210			if (bclear(bp) != TRUE) {
211			pclose(fpipe);
212			return (FALSE);
213			}
214			bp->b_flag \|= BFREADONLY;
215
216			clen = snprintf(title, sizeof(title), "%s%s",
217			"Creating cscope file list 'cscope.files' in: ", dir);
218			if (clen < 0 \|\| clen >= sizeof(title)) {
219			pclose(fpipe);
220			return (FALSE);
221			}
222			addline(bp, title);
223			addline(bp, "");
224			/* All lines are NUL terminated */
225			while ((line = fgetln(fpipe, &len)) != NULL) {
226			line[len - 1] = '\0';
227			addline(bp, line);
228			}
229			pclose(fpipe);
230			return (popbuftop(bp, WNONE));
231			}
232
233			/*
234			* Next Symbol. Bound to C-c s n
235			*/
236			/* ARGSUSED */
237			int
238			csnextmatch(int f, int n)
239			{
240			struct csrecord *r;
241			struct csmatch *m;
242
243			if (curmatch == NULL) {
244			if ((r = TAILQ_FIRST(&csrecords)) == NULL) {
245			dobeep();
246			ewprintf("The cscope buffer does not exist yet");
247			return (FALSE);
248			}
249			currecord = r;
250			curmatch = TAILQ_FIRST(&r->matches);
251			} else {
252			m = TAILQ_NEXT(curmatch, entry);
253			if (m == NULL) {
254			r = TAILQ_NEXT(currecord, entry);
255			if (r == NULL) {
256			dobeep();
257			ewprintf("The end of cscope buffer has been"
258			" reached");
259			return (FALSE);
260			} else {
261			currecord = r;
262			curmatch = TAILQ_FIRST(&currecord->matches);
263			}
264			} else
265			curmatch = m;
266			}
267			return (jumptomatch());
268			}
269
270			/*
271			* Previous Symbol. Bound to C-c s p
272			*/
273			/* ARGSUSED */
274			int
275			csprevmatch(int f, int n)
276			{
277			struct csmatch *m;
278			struct csrecord *r;
279
280			if (curmatch == NULL)
281			return (FALSE);
282			else {
283			m = TAILQ_PREV(curmatch, matches, entry);
284			if (m)
285			curmatch = m;
286			else {
287			r = TAILQ_PREV(currecord, csrecords, entry);
288			if (r == NULL) {
289			dobeep();
290			ewprintf("The beginning of cscope buffer has"
291			" been reached");
292			return (FALSE);
293			} else {
294			currecord = r;
295			curmatch = TAILQ_LAST(&currecord->matches,
296			matches);
297			}
298			}
299			}
300			return (jumptomatch());
301			}
302
303			/*
304			* Next file.
305			*/
306			int
307			csnextfile(int f, int n)
308			{
309			struct csrecord *r;
310
311			if (curmatch == NULL) {
312			if ((r = TAILQ_FIRST(&csrecords)) == NULL) {
313			dobeep();
314			ewprintf("The cscope buffer does not exist yet");
315			return (FALSE);
316			}
317
318			} else {
319			if ((r = TAILQ_NEXT(currecord, entry)) == NULL) {
320			dobeep();
321			ewprintf("The end of cscope buffer has been reached");
322			return (FALSE);
323			}
324			}
325			currecord = r;
326			curmatch = TAILQ_FIRST(&currecord->matches);
327			return (jumptomatch());
328			}
329
330			/*
331			* Previous file.
332			*/
333			int
334			csprevfile(int f, int n)
335			{
336			struct csrecord *r;
337
338			if (curmatch == NULL) {
339			if ((r = TAILQ_FIRST(&csrecords)) == NULL) {
340			dobeep();
341			ewprintf("The cscope buffer does not exist yet");
342			return (FALSE);
343			}
344
345			} else {
346			if ((r = TAILQ_PREV(currecord, csrecords, entry)) == NULL) {
347			dobeep();
348			ewprintf("The beginning of cscope buffer has been"
349			" reached");
350			return (FALSE);
351			}
352			}
353			currecord = r;
354			curmatch = TAILQ_FIRST(&currecord->matches);
355			return (jumptomatch());
356			}
357
358			/*
359			* The current symbol location is extracted from currecord->filename and
360			* curmatch->lineno. Load the file similar to filevisit and goto the
361			* lineno recorded.
362			*/
363			int
364			jumptomatch(void)
365			{
366			struct buffer *bp;
367			char *adjf;
368
369			if (curmatch == NULL \|\| currecord == NULL)
370			return (FALSE);
371			adjf = adjustname(currecord->filename, TRUE);
372			if (adjf == NULL)
373			return (FALSE);
374			if ((bp = findbuffer(adjf)) == NULL)
375			return (FALSE);
376			curbp = bp;
377			if (showbuffer(bp, curwp, WFFULL) != TRUE)
378			return (FALSE);
379			if (bp->b_fname[0] == '\0') {
380			if (readin(adjf) != TRUE)
381			killbuffer(bp);
382			}
383			gotoline(FFARG, curmatch->lineno);
384			return (TRUE);
385			}
386
387			/*
388			* Ask for the symbol, construct cscope commandline with the symbol
389			* and passed in index. Popen cscope, read the output into cscope
390			* buffer and pop it.
391			*/
392			int
393			do_cscope(int i)
394			{
395			struct buffer *bp;
396			FILE *fpipe;
397			char pattern[MAX_TOKEN], cmd[BUFSIZ], title[BUFSIZ];
398			char p, buf;
399			int clen, nores = 0;
400			size_t len;
401
402			/* If current buffer isn't a source file just return */
403			if (fnmatch("*.[chy]", curbp->b_fname, 0) != 0) {
404			dobeep();
405			ewprintf("C-c s not defined");
406			return (FALSE);
407			}
408
409			if (curtoken(0, 1, pattern) == FALSE)
410			return (FALSE);
411			p = eread("%s", pattern, MAX_TOKEN, EFNEW \| EFCR \| EFDEF, csprompt[i]);
412			if (p == NULL)
413			return (ABORT);
414			else if (p[0] == '\0')
415			return (FALSE);
416
417			if (csexists("cscope") == FALSE) {
418			dobeep();
419			ewprintf("no such file or directory, cscope");
420			return (FALSE);
421			}
422
423			csflush();
424			clen = snprintf(cmd, sizeof(cmd), "cscope -L -%d %s 2>/dev/null",
425			i, pattern);
426			if (clen < 0 \|\| clen >= sizeof(cmd))
427			return (FALSE);
428
429			if ((fpipe = popen(cmd, "r")) == NULL) {
430			dobeep();
431			ewprintf("problem opening pipe");
432			return (FALSE);
433			}
434
435			bp = bfind("cscope", TRUE);
436			if (bclear(bp) != TRUE) {
437			pclose(fpipe);
438			return (FALSE);
439			}
440			bp->b_flag \|= BFREADONLY;
441
442			clen = snprintf(title, sizeof(title), "%s%s", csprompt[i], pattern);
443			if (clen < 0 \|\| clen >= sizeof(title)) {
444			pclose(fpipe);
445			return (FALSE);
446			}
447			addline(bp, title);
448			addline(bp, "");
449			addline(bp, "-------------------------------------------------------------------------------");
450			/* All lines are NUL terminated */
451			while ((buf = fgetln(fpipe, &len)) != NULL) {
452			buf[len - 1] = '\0';
453			if (addentry(bp, buf) != TRUE)
454			return (FALSE);
455			nores = 1;
456			};
457			pclose(fpipe);
458			addline(bp, "-------------------------------------------------------------------------------");
459			if (nores == 0)
460			ewprintf("No matches were found.");
461			return (popbuftop(bp, WNONE));
462			}
463
464			/*
465			* For each line read from cscope output, extract the tokens,
466			* add them to list and pretty print a line in cscope buffer.
467			*/
468			int
469			addentry(struct buffer bp, char csline)
470			{
471			struct csrecord *r;
472			struct csmatch *m;
473			struct cstokens t;
474			int lineno;
475			char buf[BUFSIZ];
476			const char *errstr;
477
478			r = NULL;
479			if (getattr(csline, &t) == FALSE)
480			return (FALSE);
481
482			lineno = strtonum(t.lineno, INT_MIN, INT_MAX, &errstr);
483			if (errstr)
484			return (FALSE);
485
486			if (addentryfn == NULL \|\| strcmp(addentryfn, t.fname) != 0) {
487			if ((r = malloc(sizeof(struct csrecord))) == NULL)
488			return (FALSE);
489			addentryr = r;
490			if ((r->filename = strndup(t.fname, NFILEN)) == NULL)
491			goto cleanup;
492			addentryfn = r->filename;
493			TAILQ_INIT(&r->matches);
494			if ((m = malloc(sizeof(struct csmatch))) == NULL)
495			goto cleanup;
496			m->lineno = lineno;
497			TAILQ_INSERT_TAIL(&r->matches, m, entry);
498			TAILQ_INSERT_TAIL(&csrecords, r, entry);
499			addline(bp, "");
500			if (snprintf(buf, sizeof(buf), "*** %s", t.fname) < 0)
501			goto cleanup;
502			addline(bp, buf);
503			} else {
504			if ((m = malloc(sizeof(struct csmatch))) == NULL)
505			goto cleanup;
506			m->lineno = lineno;
507			TAILQ_INSERT_TAIL(&addentryr->matches, m, entry);
508			}
509			prettyprint(bp, &t);
510			return (TRUE);
511			cleanup:
512			free(r);
513			return (FALSE);
514			}
515
516			/*
517			* Cscope line: <filename> <function> <lineno> <pattern>
518			*/
519			int
520			getattr(char line, struct cstokens t)
521			{
522			char *p;
523
524			if ((p = strchr(line, ' ')) == NULL)
525			return (FALSE);
526			*p++ = '\0';
527			t->fname = line;
528			line = p;
529
530			if ((p = strchr(line, ' ')) == NULL)
531			return (FALSE);
532			*p++ = '\0';
533			t->function = line;
534			line = p;
535
536			if ((p = strchr(line, ' ')) == NULL)
537			return (FALSE);
538			*p++ = '\0';
539			t->lineno = line;
540
541			if (*p == '\0')
542			return (FALSE);
543			t->pattern = p;
544
545			return (TRUE);
546			}
547
548			void
549			prettyprint(struct buffer bp, struct cstokens t)
550			{
551			char buf[BUFSIZ];
552
553			if (snprintf(buf, sizeof(buf), "%s[%s]\t\t%s",
554			t->function, t->lineno, ltrim(t->pattern)) < 0)
555			return;
556			addline(bp, buf);
557			}
558
559			const char *
560			ltrim(const char *s)
561			{
562			while (isblank((unsigned char)*s))
563			s++;
564			return s;
565			}
566
567			void
568			csflush(void)
569			{
570			struct csrecord *r;
571			struct csmatch *m;
572
573			while ((r = TAILQ_FIRST(&csrecords)) != NULL) {
574			free(r->filename);
575			while ((m = TAILQ_FIRST(&r->matches)) != NULL) {
576			TAILQ_REMOVE(&r->matches, m, entry);
577			free(m);
578			}
579			TAILQ_REMOVE(&csrecords, r, entry);
580			free(r);
581			}
582			addentryr = NULL;
583			addentryfn = NULL;
584			currecord = NULL;
585			curmatch = NULL;
586			}
587
588			/*
589			* Check if the cmd exists in $PATH. Split on ":" and iterate through
590			* all paths in $PATH.
591			*/
592			int
593			csexists(const char *cmd)
594			{
595			char fname[NFILEN], dir, path, pathc, tmp;
596			int len, dlen;
597
598			/* Special case if prog contains '/' */
599			if (strchr(cmd, '/')) {
600			if (access(cmd, F_OK) == -1)
601			return (FALSE);
602			else
603			return (TRUE);
604			}
605			if ((tmp = getenv("PATH")) == NULL)
606			return (FALSE);
607			if ((pathc = path = strndup(tmp, NFILEN)) == NULL) {
608			dobeep();
609			ewprintf("out of memory");
610			return (FALSE);
611			}
612			while ((dir = strsep(&path, ":")) != NULL) {
613			if (*dir == '\0')
614			continue;
615
616			dlen = strlen(dir);
617			while (dlen > 0 && dir[dlen-1] == '/')
618			dir[--dlen] = '\0'; /* strip trailing '/' */
619
620			len = snprintf(fname, sizeof(fname), "%s/%s", dir, cmd);
621			if (len == -1 \|\| len >= sizeof(fname)) {
622			dobeep();
623			ewprintf("path too long");
624			goto cleanup;
625			}
626			if(access(fname, F_OK) == 0) {
627			free(pathc);
628			return (TRUE);
629			}
630			}
631			cleanup:
632			free(pathc);
633			return (FALSE);
634			}