--- /dev/null
+/* $OpenBSD: cscope.c,v 1.3 2012/07/02 08:08:31 lum Exp $ */
+
+/*
+ * This file is in the public domain.
+ *
+ * Author: Sunil Nimmagadda <sunil@sunilnimmagadda.com>
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/queue.h>
+
+#include <ctype.h>
+#include <fcntl.h>
+#include <fnmatch.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.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) {
+ ewprintf("stat: %s", strerror(errno));
+ return (FALSE);
+ } else if (S_ISDIR(sb.st_mode) == 0) {
+ ewprintf("%s: Not a directory", dir);
+ return (FALSE);
+ }
+
+ if (csexists("cscope-indexer") == FALSE) {
+ 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) {
+ ewprintf("problem opening pipe");
+ return (FALSE);
+ }
+
+ bp = bfind("*cscope*", TRUE);
+ if (bclear(bp) != TRUE)
+ 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))
+ 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) {
+ 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) {
+ 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) {
+ 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) {
+ ewprintf("The *cscope* buffer does not exist yet");
+ return (FALSE);
+ }
+
+ } else {
+ if ((r = TAILQ_NEXT(currecord, entry)) == NULL) {
+ 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) {
+ ewprintf("The *cscope* buffer does not exist yet");
+ return (FALSE);
+ }
+
+ } else {
+ if ((r = TAILQ_PREV(currecord, csrecords, entry)) == NULL) {
+ 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) {
+ ewprintf("C-c s not defined");
+ return (FALSE);
+ }
+
+ if (curtoken(0, 1, pattern) == FALSE)
+ return (FALSE);
+ p = eread(csprompt[i], pattern, MAX_TOKEN, EFNEW | EFCR | EFDEF);
+ if (p == NULL)
+ return (ABORT);
+ else if (p[0] == '\0')
+ return (FALSE);
+
+ if (csexists("cscope") == FALSE) {
+ 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) {
+ ewprintf("problem opening pipe");
+ return (FALSE);
+ }
+
+ bp = bfind("*cscope*", TRUE);
+ if (bclear(bp) != TRUE)
+ return (FALSE);
+ bp->b_flag |= BFREADONLY;
+
+ clen = snprintf(title, sizeof(title), "%s%s", csprompt[i], pattern);
+ if (clen < 0 || clen >= sizeof(title))
+ 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(*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 cmdlen, 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) {
+ ewprintf("out of memory");
+ return (FALSE);
+ }
+ cmdlen = strlen(cmd);
+ while ((dir = strsep(&path, ":")) != NULL) {
+ if (*dir == '\0')
+ *dir = '.';
+
+ dlen = strlen(dir);
+ while (dir[dlen-1] == '/')
+ dir[--dlen] = '\0'; /* strip trailing '/' */
+
+ if (dlen + 1 + cmdlen >= sizeof(fname)) {
+ ewprintf("path too long");
+ goto cleanup;
+ }
+ snprintf(fname, sizeof(fname), "%s/%s", dir, cmd);
+ if(access(fname, F_OK) == 0) {
+ free(pathc);
+ return (TRUE);
+ }
+ }
+cleanup:
+ free(pathc);
+ return (FALSE);
+}
projects / pd_readline / blobdiff