new file mode 100644
--- /dev/null
+++ b/src/if_cscope.c
@@ -0,0 +1,2270 @@
+/* vi:set ts=8 sts=4 sw=4:
+ *
+ * CSCOPE support for Vim added by Andy Kahn <kahn@zk3.dec.com>
+ * Ported to Win32 by Sergey Khorev <khorev@softlab.ru>
+ *
+ * The basic idea/structure of cscope for Vim was borrowed from Nvi.  There
+ * might be a few lines of code that look similar to what Nvi has.
+ *
+ * See README.txt for an overview of the Vim source code.
+ */
+
+#include "vim.h"
+
+#if defined(FEAT_CSCOPE) || defined(PROTO)
+
+#include <string.h>
+#include <errno.h>
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#if defined(UNIX)
+# include <sys/wait.h>
+#else
+    /* not UNIX, must be WIN32 */
+# include <io.h>
+# include <fcntl.h>
+# include <process.h>
+# define STDIN_FILENO    0
+# define STDOUT_FILENO   1
+# define STDERR_FILENO   2
+# define pipe(fds) _pipe(fds, 256, O_TEXT|O_NOINHERIT)
+#endif
+#include "if_cscope.h"
+
+static void	    cs_usage_msg __ARGS((csid_e x));
+static int	    cs_add __ARGS((exarg_T *eap));
+static void	    cs_stat_emsg __ARGS((char *fname));
+static int	    cs_add_common __ARGS((char *, char *, char *));
+static int	    cs_check_for_connections __ARGS((void));
+static int	    cs_check_for_tags __ARGS((void));
+static int	    cs_cnt_connections __ARGS((void));
+static void	    cs_reading_emsg __ARGS((int idx));
+static int	    cs_cnt_matches __ARGS((int idx));
+static char *	    cs_create_cmd __ARGS((char *csoption, char *pattern));
+static int	    cs_create_connection __ARGS((int i));
+static void	    do_cscope_general __ARGS((exarg_T *eap, int make_split));
+static void	    cs_file_results __ARGS((FILE *, int *));
+static void	    cs_fill_results __ARGS((char *, int , int *, char ***,
+			char ***, int *));
+static int	    cs_find __ARGS((exarg_T *eap));
+static int	    cs_find_common __ARGS((char *opt, char *pat, int, int ));
+static int	    cs_help __ARGS((exarg_T *eap));
+static void	    cs_init __ARGS((void));
+static void	    clear_csinfo __ARGS((int i));
+static int	    cs_insert_filelist __ARGS((char *, char *, char *,
+			struct stat *));
+static int	    cs_kill __ARGS((exarg_T *eap));
+static void	    cs_kill_execute __ARGS((int, char *));
+static cscmd_T *    cs_lookup_cmd __ARGS((exarg_T *eap));
+static char *	    cs_make_vim_style_matches __ARGS((char *, char *,
+			char *, char *));
+static char *	    cs_manage_matches __ARGS((char **, char **, int, mcmd_e));
+static char *	    cs_parse_results __ARGS((int cnumber, char *buf, int bufsize, char **context, char **linenumber, char **search));
+static char *	    cs_pathcomponents __ARGS((char *path));
+static void	    cs_print_tags_priv __ARGS((char **, char **, int));
+static int	    cs_read_prompt __ARGS((int ));
+static void	    cs_release_csp __ARGS((int, int freefnpp));
+static int	    cs_reset __ARGS((exarg_T *eap));
+static char *	    cs_resolve_file __ARGS((int, char *));
+static int	    cs_show __ARGS((exarg_T *eap));
+
+
+static csinfo_T	    csinfo[CSCOPE_MAX_CONNECTIONS];
+static cscmd_T	    cs_cmds[] =
+{
+    { "add",	cs_add,
+		N_("Add a new database"),     "add file|dir [pre-path] [flags]", 0 },
+    { "find",	cs_find,
+		N_("Query for a pattern"),    FIND_USAGE, 1 },
+    { "help",	cs_help,
+		N_("Show this message"),      "help", 0 },
+    { "kill",	cs_kill,
+		N_("Kill a connection"),      "kill #", 0 },
+    { "reset",	cs_reset,
+		N_("Reinit all connections"), "reset", 0 },
+    { "show",	cs_show,
+		N_("Show connections"),       "show", 0 },
+    { NULL }
+};
+
+    static void
+cs_usage_msg(x)
+    csid_e x;
+{
+    (void)EMSG2(_("E560: Usage: cs[cope] %s"), cs_cmds[(int)x].usage);
+}
+
+/*
+ * PRIVATE: do_cscope_general
+ *
+ * find the command, print help if invalid, and the then call the
+ * corresponding command function,
+ * called from do_cscope and do_scscope
+ */
+    static void
+do_cscope_general(eap, make_split)
+    exarg_T	*eap;
+    int		make_split; /* whether to split window */
+{
+    cscmd_T *cmdp;
+
+    cs_init();
+    if ((cmdp = cs_lookup_cmd(eap)) == NULL)
+    {
+	cs_help(eap);
+	return;
+    }
+
+#ifdef FEAT_WINDOWS
+    if (make_split)
+    {
+	if (!cmdp->cansplit)
+	{
+	    (void)MSG_PUTS(_("This cscope command does not support splitting the window.\n"));
+	    return;
+	}
+	postponed_split = -1;
+	postponed_split_flags = cmdmod.split;
+    }
+#endif
+
+    cmdp->func(eap);
+
+#ifdef FEAT_WINDOWS
+    postponed_split_flags = 0;
+#endif
+}
+
+/*
+ * PUBLIC: do_cscope
+ */
+    void
+do_cscope(eap)
+    exarg_T *eap;
+{
+    do_cscope_general(eap, FALSE);
+}
+
+/*
+ * PUBLIC: do_scscope
+ *
+ * same as do_cscope, but splits window, too.
+ */
+    void
+do_scscope(eap)
+    exarg_T *eap;
+{
+    do_cscope_general(eap, TRUE);
+}
+
+/*
+ * PUBLIC: do_cstag
+ *
+ */
+    void
+do_cstag(eap)
+    exarg_T *eap;
+{
+    int ret = FALSE;
+
+    cs_init();
+
+    if (eap->arg == NULL || strlen((const char *)(eap->arg)) == 0)
+    {
+	(void)EMSG(_("E562: Usage: cstag <ident>"));
+	return;
+    }
+
+    switch (p_csto)
+    {
+    case 0 :
+	if (cs_check_for_connections())
+	{
+	    ret = cs_find_common("g", (char *)(eap->arg), eap->forceit, FALSE);
+	    if (ret == FALSE)
+	    {
+		cs_free_tags();
+		if (msg_col)
+		    msg_putchar('\n');
+
+		if (cs_check_for_tags())
+		    ret = do_tag(eap->arg, DT_JUMP, 0, eap->forceit, FALSE);
+	    }
+	}
+	else if (cs_check_for_tags())
+	{
+	    ret = do_tag(eap->arg, DT_JUMP, 0, eap->forceit, FALSE);
+	}
+	break;
+    case 1 :
+	if (cs_check_for_tags())
+	{
+	    ret = do_tag(eap->arg, DT_JUMP, 0, eap->forceit, FALSE);
+	    if (ret == FALSE)
+	    {
+		if (msg_col)
+		    msg_putchar('\n');
+
+		if (cs_check_for_connections())
+		{
+		    ret = cs_find_common("g", (char *)(eap->arg), eap->forceit,
+					 FALSE);
+		    if (ret == FALSE)
+			cs_free_tags();
+		}
+	    }
+	}
+	else if (cs_check_for_connections())
+	{
+	    ret = cs_find_common("g", (char *)(eap->arg), eap->forceit, FALSE);
+	    if (ret == FALSE)
+		cs_free_tags();
+	}
+	break;
+    default :
+	break;
+    }
+
+    if (!ret)
+    {
+	(void)EMSG(_("E257: cstag: tag not found"));
+#if defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX)
+	g_do_tagpreview = 0;
+#endif
+    }
+
+} /* do_cscope */
+
+
+/*
+ * PUBLIC: cs_find
+ *
+ * this simulates a vim_fgets(), but for cscope, returns the next line
+ * from the cscope output.  should only be called from find_tags()
+ *
+ * returns TRUE if eof, FALSE otherwise
+ */
+    int
+cs_fgets(buf, size)
+    char_u	*buf;
+    int		size;
+{
+    char *p;
+
+    if ((p = cs_manage_matches(NULL, NULL, -1, Get)) == NULL)
+	return TRUE;
+
+    if ((int)strlen(p) > size)
+    {
+	strncpy((char *)buf, p, size - 1);
+	buf[size] = '\0';
+    }
+    else
+	(void)strcpy((char *)buf, p);
+
+    return FALSE;
+} /* cs_fgets */
+
+
+/*
+ * PUBLIC: cs_free_tags
+ *
+ * called only from do_tag(), when popping the tag stack
+ */
+    void
+cs_free_tags()
+{
+    cs_manage_matches(NULL, NULL, -1, Free);
+}
+
+
+/*
+ * PUBLIC: cs_print_tags
+ *
+ * called from do_tag()
+ */
+    void
+cs_print_tags()
+{
+    cs_manage_matches(NULL, NULL, -1, Print);
+}
+
+
+/*
+ * "cscope_connection([{num} , {dbpath} [, {prepend}]])" function
+ *
+ *		Checks for the existence of a |cscope| connection.  If no
+ *		parameters are specified, then the function returns:
+ *
+ *		0, if cscope was not available (not compiled in), or if there
+ *		are no cscope connections; or
+ *		1, if there is at least one cscope connection.
+ *
+ *		If parameters are specified, then the value of {num}
+ *		determines how existence of a cscope connection is checked:
+ *
+ *		{num}	Description of existence check
+ *		-----	------------------------------
+ *		0	Same as no parameters (e.g., "cscope_connection()").
+ *		1	Ignore {prepend}, and use partial string matches for
+ *			{dbpath}.
+ *		2	Ignore {prepend}, and use exact string matches for
+ *			{dbpath}.
+ *		3	Use {prepend}, use partial string matches for both
+ *			{dbpath} and {prepend}.
+ *		4	Use {prepend}, use exact string matches for both
+ *			{dbpath} and {prepend}.
+ *
+ *		Note: All string comparisons are case sensitive!
+ */
+#if defined(FEAT_EVAL) || defined(PROTO)
+    int
+cs_connection(num, dbpath, ppath)
+    int num;
+    char_u *dbpath;
+    char_u *ppath;
+{
+    int i;
+
+    if (num < 0 || num > 4 || (num > 0 && !dbpath))
+	return FALSE;
+
+    for (i = 0; i < CSCOPE_MAX_CONNECTIONS; i++)
+    {
+	if (!csinfo[i].fname)
+	    continue;
+
+	if (num == 0)
+	    return TRUE;
+
+	switch (num)
+	{
+	case 1:
+	    if (strstr(csinfo[i].fname, (char *)dbpath))
+		return TRUE;
+	    break;
+	case 2:
+	    if (strcmp(csinfo[i].fname, (char *)dbpath) == 0)
+		return TRUE;
+	    break;
+	case 3:
+	    if (strstr(csinfo[i].fname, (char *)dbpath)
+		    && ((!ppath && !csinfo[i].ppath)
+			|| (ppath
+			    && csinfo[i].ppath
+			    && strstr(csinfo[i].ppath, (char *)ppath))))
+		return TRUE;
+	    break;
+	case 4:
+	    if ((strcmp(csinfo[i].fname, (char *)dbpath) == 0)
+		    && ((!ppath && !csinfo[i].ppath)
+			|| (ppath
+			    && csinfo[i].ppath
+			    && (strcmp(csinfo[i].ppath, (char *)ppath) == 0))))
+		return TRUE;
+	    break;
+	}
+    }
+
+    return FALSE;
+} /* cs_connection */
+#endif
+
+
+/*
+ * PRIVATE functions
+ ****************************************************************************/
+
+/*
+ * PRIVATE: cs_add
+ *
+ * add cscope database or a directory name (to look for cscope.out)
+ * the the cscope connection list
+ *
+ * MAXPATHL 256
+ */
+/* ARGSUSED */
+    static int
+cs_add(eap)
+    exarg_T *eap;
+{
+    char *fname, *ppath, *flags = NULL;
+
+    if ((fname = strtok((char *)NULL, (const char *)" ")) == NULL)
+    {
+	cs_usage_msg(Add);
+	return CSCOPE_FAILURE;
+    }
+    if ((ppath = strtok((char *)NULL, (const char *)" ")) != NULL)
+	flags = strtok((char *)NULL, (const char *)" ");
+
+    return cs_add_common(fname, ppath, flags);
+}
+
+    static void
+cs_stat_emsg(fname)
+    char *fname;
+{
+    char *stat_emsg = _("E563: stat(%s) error: %d");
+    char *buf = (char *)alloc((unsigned)strlen(stat_emsg) + MAXPATHL + 10);
+
+    if (buf != NULL)
+    {
+	(void)sprintf(buf, stat_emsg, fname, errno);
+	(void)EMSG(buf);
+	vim_free(buf);
+    }
+    else
+	(void)EMSG(_("E563: stat error"));
+}
+
+
+/*
+ * PRIVATE: cs_add_common
+ *
+ * the common routine to add a new cscope connection.  called by
+ * cs_add() and cs_reset().  i really don't like to do this, but this
+ * routine uses a number of goto statements.
+ */
+    static int
+cs_add_common(arg1, arg2, flags)
+    char *arg1;	    /* filename - may contain environment variables */
+    char *arg2;	    /* prepend path - may contain environment variables */
+    char *flags;
+{
+    struct stat statbuf;
+    int ret;
+    char *fname = NULL;
+    char *fname2 = NULL;
+    char *ppath = NULL;
+    int i;
+
+    /* get the filename (arg1), expand it, and try to stat it */
+    if ((fname = (char *)alloc(MAXPATHL+1)) == NULL)
+	goto add_err;
+
+    expand_env((char_u *)arg1, (char_u *)fname, MAXPATHL);
+    ret = stat(fname, &statbuf);
+    if (ret < 0)
+    {
+staterr:
+	if (p_csverbose)
+	    cs_stat_emsg(fname);
+	goto add_err;
+    }
+
+    /* get the prepend path (arg2), expand it, and try to stat it */
+    if (arg2 != NULL)
+    {
+	struct stat statbuf2;
+
+	if ((ppath = (char *)alloc(MAXPATHL+1)) == NULL)
+	    goto add_err;
+
+	expand_env((char_u *)arg2, (char_u *)ppath, MAXPATHL);
+	ret = stat(ppath, &statbuf2);
+	if (ret < 0)
+	    goto staterr;
+    }
+
+    /* if filename is a directory, append the cscope database name to it */
+    if ((statbuf.st_mode & S_IFMT) == S_IFDIR)
+    {
+	fname2 = (char *)alloc(strlen(CSCOPE_DBFILE) + strlen(fname) + 2);
+	if (fname2 == NULL)
+	    goto add_err;
+
+	while (fname[strlen(fname)-1] == '/'
+#ifdef WIN32
+		|| fname[strlen(fname)-1] == '\\'
+#endif
+		)
+	{
+	    fname[strlen(fname)-1] = '\0';
+	    if (strlen(fname) == 0)
+		break;
+	}
+	if (fname[0] == '\0')
+	    (void)sprintf(fname2, "/%s", CSCOPE_DBFILE);
+	else
+	    (void)sprintf(fname2, "%s/%s", fname, CSCOPE_DBFILE);
+
+	ret = stat(fname2, &statbuf);
+	if (ret < 0)
+	{
+	    if (p_csverbose)
+		cs_stat_emsg(fname2);
+	    goto add_err;
+	}
+
+	i = cs_insert_filelist(fname2, ppath, flags, &statbuf);
+    }
+#if defined(UNIX)
+    else if (S_ISREG(statbuf.st_mode) || S_ISLNK(statbuf.st_mode))
+#else
+	/* substitute define S_ISREG from os_unix.h */
+    else if (((statbuf.st_mode) & S_IFMT) == S_IFREG)
+#endif
+    {
+	i = cs_insert_filelist(fname, ppath, flags, &statbuf);
+    }
+    else
+    {
+	if (p_csverbose)
+	    (void)EMSG2(
+		_("E564: %s is not a directory or a valid cscope database"),
+		fname);
+	goto add_err;
+    }
+
+    if (i != -1)
+    {
+	if (cs_create_connection(i) == CSCOPE_FAILURE
+		|| cs_read_prompt(i) == CSCOPE_FAILURE)
+	{
+	    cs_release_csp(i, TRUE);
+	    goto add_err;
+	}
+
+	if (p_csverbose)
+	{
+	    msg_clr_eos();
+	    (void)smsg_attr(hl_attr(HLF_R),
+			    (char_u *)_("Added cscope database %s"),
+			    csinfo[i].fname);
+	}
+    }
+
+    vim_free(fname);
+    vim_free(fname2);
+    vim_free(ppath);
+    return CSCOPE_SUCCESS;
+
+add_err:
+    vim_free(fname2);
+    vim_free(fname);
+    vim_free(ppath);
+    return CSCOPE_FAILURE;
+} /* cs_add_common */
+
+
+    static int
+cs_check_for_connections()
+{
+    return (cs_cnt_connections() > 0);
+} /* cs_check_for_connections */
+
+
+    static int
+cs_check_for_tags()
+{
+    return (p_tags[0] != NUL && curbuf->b_p_tags != NUL);
+} /* cs_check_for_tags */
+
+
+/*
+ * PRIVATE: cs_cnt_connections
+ *
+ * count the number of cscope connections
+ */
+    static int
+cs_cnt_connections()
+{
+    short i;
+    short cnt = 0;
+
+    for (i = 0; i < CSCOPE_MAX_CONNECTIONS; i++)
+    {
+	if (csinfo[i].fname != NULL)
+	    cnt++;
+    }
+    return cnt;
+} /* cs_cnt_connections */
+
+    static void
+cs_reading_emsg(idx)
+    int idx;	/* connection index */
+{
+    EMSGN(_("E262: error reading cscope connection %ld"), idx);
+}
+
+#define	CSREAD_BUFSIZE	2048
+/*
+ * PRIVATE: cs_cnt_matches
+ *
+ * count the number of matches for a given cscope connection.
+ */
+    static int
+cs_cnt_matches(idx)
+    int idx;
+{
+    char *stok;
+    char *buf;
+    int nlines;
+
+    buf = (char *)alloc(CSREAD_BUFSIZE);
+    if (buf == NULL)
+	return 0;
+    for (;;)
+    {
+	if (!fgets(buf, CSREAD_BUFSIZE, csinfo[idx].fr_fp))
+	{
+	    if (feof(csinfo[idx].fr_fp))
+		errno = EIO;
+
+	    cs_reading_emsg(idx);
+
+	    vim_free(buf);
+	    return -1;
+	}
+
+	/*
+	 * If the database is out of date, or there's some other problem,
+	 * cscope will output error messages before the number-of-lines output.
+	 * Display/discard any output that doesn't match what we want.
+	 */
+	if ((stok = strtok(buf, (const char *)" ")) == NULL)
+	    continue;
+	if (strcmp((const char *)stok, "cscope:"))
+	    continue;
+
+	if ((stok = strtok(NULL, (const char *)" ")) == NULL)
+	    continue;
+	nlines = atoi(stok);
+	if (nlines < 0)
+	{
+	    nlines = 0;
+	    break;
+	}
+
+	if ((stok = strtok(NULL, (const char *)" ")) == NULL)
+	    continue;
+	if (strncmp((const char *)stok, "lines", 5))
+	    continue;
+
+	break;
+    }
+
+    vim_free(buf);
+    return nlines;
+} /* cs_cnt_matches */
+
+
+/*
+ * PRIVATE: cs_create_cmd
+ *
+ * Creates the actual cscope command query from what the user entered.
+ */
+    static char *
+cs_create_cmd(csoption, pattern)
+    char *csoption;
+    char *pattern;
+{
+    char *cmd;
+    short search;
+
+    switch (csoption[0])
+    {
+    case '0' : case 's' :
+	search = 0;
+	break;
+    case '1' : case 'g' :
+	search = 1;
+	break;
+    case '2' : case 'd' :
+	search = 2;
+	break;
+    case '3' : case 'c' :
+	search = 3;
+	break;
+    case '4' : case 't' :
+	search = 4;
+	break;
+    case '6' : case 'e' :
+	search = 6;
+	break;
+    case '7' : case 'f' :
+	search = 7;
+	break;
+    case '8' : case 'i' :
+	search = 8;
+	break;
+    default :
+	(void)EMSG(_("E561: unknown cscope search type"));
+	cs_usage_msg(Find);
+	return NULL;
+    }
+
+    if ((cmd = (char *)alloc(strlen(pattern) + 2)) == NULL)
+	return NULL;
+
+    (void)sprintf(cmd, "%d%s", search, pattern);
+
+    return cmd;
+} /* cs_create_cmd */
+
+
+/*
+ * PRIVATE: cs_create_connection
+ *
+ * This piece of code was taken/adapted from nvi.  do we need to add
+ * the BSD license notice?
+ */
+    static int
+cs_create_connection(i)
+    int i;
+{
+    int to_cs[2], from_cs[2], len;
+    char *prog, *cmd, *ppath = NULL;
+#ifndef UNIX
+    int in_save, out_save, err_save;
+    int ph;
+# ifdef FEAT_GUI
+    HWND activewnd = NULL;
+    HWND consolewnd = NULL;
+# endif
+#endif
+
+    /*
+     * Cscope reads from to_cs[0] and writes to from_cs[1]; vi reads from
+     * from_cs[0] and writes to to_cs[1].
+     */
+    to_cs[0] = to_cs[1] = from_cs[0] = from_cs[1] = -1;
+    if (pipe(to_cs) < 0 || pipe(from_cs) < 0)
+    {
+	(void)EMSG(_("E566: Could not create cscope pipes"));
+err_closing:
+	if (to_cs[0] != -1)
+	    (void)close(to_cs[0]);
+	if (to_cs[1] != -1)
+	    (void)close(to_cs[1]);
+	if (from_cs[0] != -1)
+	    (void)close(from_cs[0]);
+	if (from_cs[1] != -1)
+	    (void)close(from_cs[1]);
+	return CSCOPE_FAILURE;
+    }
+
+#if defined(UNIX)
+    switch (csinfo[i].pid = fork())
+    {
+    case -1:
+	(void)EMSG(_("E622: Could not fork for cscope"));
+	goto err_closing;
+    case 0:				/* child: run cscope. */
+#else
+	in_save = dup(STDIN_FILENO);
+	out_save = dup(STDOUT_FILENO);
+	err_save = dup(STDERR_FILENO);
+#endif
+	if (dup2(to_cs[0], STDIN_FILENO) == -1)
+	    PERROR("cs_create_connection 1");
+	if (dup2(from_cs[1], STDOUT_FILENO) == -1)
+	    PERROR("cs_create_connection 2");
+	if (dup2(from_cs[1], STDERR_FILENO) == -1)
+	    PERROR("cs_create_connection 3");
+
+	/* close unused */
+#if defined(UNIX)
+	(void)close(to_cs[1]);
+	(void)close(from_cs[0]);
+#else
+	/* On win32 we must close opposite ends because we are the parent */
+	(void)close(to_cs[0]);
+	to_cs[0] = -1;
+	(void)close(from_cs[1]);
+	from_cs[1] = -1;
+#endif
+	/* expand the cscope exec for env var's */
+	if ((prog = (char *)alloc(MAXPATHL + 1)) == NULL)
+	{
+#ifdef UNIX
+	    return CSCOPE_FAILURE;
+#else
+	    goto err_closing;
+#endif
+	}
+	expand_env((char_u *)p_csprg, (char_u *)prog, MAXPATHL);
+
+	/* alloc space to hold the cscope command */
+	len = strlen(prog) + strlen(csinfo[i].fname) + 32;
+	if (csinfo[i].ppath)
+	{
+	    /* expand the prepend path for env var's */
+	    if ((ppath = (char *)alloc(MAXPATHL + 1)) == NULL)
+	    {
+		vim_free(prog);
+#ifdef UNIX
+		return CSCOPE_FAILURE;
+#else
+		goto err_closing;
+#endif
+	    }
+	    expand_env((char_u *)csinfo[i].ppath, (char_u *)ppath, MAXPATHL);
+
+	    len += strlen(ppath);
+	}
+
+	if (csinfo[i].flags)
+	    len += strlen(csinfo[i].flags);
+
+	if ((cmd = (char *)alloc(len)) == NULL)
+	{
+	    vim_free(prog);
+	    vim_free(ppath);
+#ifdef UNIX
+	    return CSCOPE_FAILURE;
+#else
+	    goto err_closing;
+#endif
+	}
+
+	/* run the cscope command; is there execl for non-unix systems? */
+#if defined(UNIX)
+	(void)sprintf(cmd, "exec %s -dl -f %s", prog, csinfo[i].fname);
+#else
+	(void)sprintf(cmd, "%s -dl -f %s", prog, csinfo[i].fname);
+#endif
+	if (csinfo[i].ppath != NULL)
+	{
+	    (void)strcat(cmd, " -P");
+	    (void)strcat(cmd, csinfo[i].ppath);
+	}
+	if (csinfo[i].flags != NULL)
+	{
+	    (void)strcat(cmd, " ");
+	    (void)strcat(cmd, csinfo[i].flags);
+	}
+# ifdef UNIX
+      /* on Win32 we still need prog */
+	vim_free(prog);
+# endif
+	vim_free(ppath);
+
+#if defined(UNIX)
+	if (execl("/bin/sh", "sh", "-c", cmd, NULL) == -1)
+	    PERROR(_("cs_create_connection exec failed"));
+
+	exit(127);
+	/* NOTREACHED */
+    default:	/* parent. */
+#else
+# ifdef FEAT_GUI
+	activewnd = GetForegroundWindow(); /* on win9x cscope steals focus */
+	/* Dirty hack to hide annoying console window */
+	if (AllocConsole())
+	{
+	    char *title;
+	    title = (char *)alloc(1024);
+	    if (title == NULL)
+		FreeConsole();
+	    else
+	    {
+		GetConsoleTitle(title, 1024); /* save for future restore */
+		SetConsoleTitle(
+		    "GVIMCS{5499421B-CBEF-45b0-85EF-38167FDEA5C5}GVIMCS");
+		Sleep(40); /* as stated in MS KB we must wait 40 ms */
+		consolewnd = FindWindow(NULL,
+			"GVIMCS{5499421B-CBEF-45b0-85EF-38167FDEA5C5}GVIMCS");
+		if (consolewnd != NULL)
+		    ShowWindow(consolewnd, SW_HIDE);
+		SetConsoleTitle(title);
+		vim_free(title);
+	    }
+	}
+# endif
+	/* May be use &shell, &shellquote etc */
+# ifdef __BORLANDC__
+	/* BCC 5.5 uses a different function name for spawnlp */
+	ph = spawnlp(P_NOWAIT, prog, cmd, NULL);
+# else
+	ph = _spawnlp(_P_NOWAIT, prog, cmd, NULL);
+# endif
+	vim_free(prog);
+	vim_free(cmd);
+# ifdef FEAT_GUI
+	/* Dirty hack part two */
+	if (activewnd != NULL)
+	    /* restoring focus */
+	    SetForegroundWindow(activewnd);
+	if (consolewnd != NULL)
+	    FreeConsole();
+
+# endif
+	if (ph == -1)
+	{
+	    PERROR(_("cs_create_connection exec failed"));
+	    (void)EMSG(_("E623: Could not spawn cscope process"));
+	    goto err_closing;
+	}
+	/* else */
+	csinfo[i].pid = 0;
+	csinfo[i].hProc = (HANDLE)ph;
+
+#endif /* !UNIX */
+	/*
+	 * Save the file descriptors for later duplication, and
+	 * reopen as streams.
+	 */
+	if ((csinfo[i].to_fp = fdopen(to_cs[1], "w")) == NULL)
+	    PERROR(_("cs_create_connection: fdopen for to_fp failed"));
+	if ((csinfo[i].fr_fp = fdopen(from_cs[0], "r")) == NULL)
+	    PERROR(_("cs_create_connection: fdopen for fr_fp failed"));
+
+#if defined(UNIX)
+	/* close unused */
+	(void)close(to_cs[0]);
+	(void)close(from_cs[1]);
+
+	break;
+    }
+#else
+	/* restore stdhandles */
+    dup2(in_save, STDIN_FILENO);
+    dup2(out_save, STDOUT_FILENO);
+    dup2(err_save, STDERR_FILENO);
+    close(in_save);
+    close(out_save);
+    close(err_save);
+#endif
+    return CSCOPE_SUCCESS;
+} /* cs_create_connection */
+
+
+/*
+ * PRIVATE: cs_find
+ *
+ * query cscope using command line interface.  parse the output and use tselect
+ * to allow choices.  like Nvi, creates a pipe to send to/from query/cscope.
+ *
+ * returns TRUE if we jump to a tag or abort, FALSE if not.
+ */
+    static int
+cs_find(eap)
+    exarg_T *eap;
+{
+    char *opt, *pat;
+
+    if (cs_check_for_connections() == FALSE)
+    {
+	(void)EMSG(_("E567: no cscope connections"));
+	return FALSE;
+    }
+
+    if ((opt = strtok((char *)NULL, (const char *)" ")) == NULL)
+    {
+	cs_usage_msg(Find);
+	return FALSE;
+    }
+
+    pat = opt + strlen(opt) + 1;
+    if (pat == NULL || (pat != NULL && pat[0] == '\0'))
+    {
+	cs_usage_msg(Find);
+	return FALSE;
+    }
+
+    return cs_find_common(opt, pat, eap->forceit, TRUE);
+} /* cs_find */
+
+
+/*
+ * PRIVATE: cs_find_common
+ *
+ * common code for cscope find, shared by cs_find() and do_cstag()
+ */
+    static int
+cs_find_common(opt, pat, forceit, verbose)
+    char *opt;
+    char *pat;
+    int forceit;
+    int verbose;
+{
+    int i;
+    char *cmd;
+    char **matches, **contexts;
+    int nummatches[CSCOPE_MAX_CONNECTIONS], totmatches, matched;
+#ifdef FEAT_QUICKFIX
+    char cmdletter;
+    char *qfpos;
+#endif
+
+    /* create the actual command to send to cscope */
+    cmd = cs_create_cmd(opt, pat);
+    if (cmd == NULL)
+	return FALSE;
+
+    /* send query to all open connections, then count the total number
+     * of matches so we can alloc matchesp all in one swell foop
+     */
+    for (i = 0; i < CSCOPE_MAX_CONNECTIONS; i++)
+	nummatches[i] = 0;
+    totmatches = 0;
+    for (i = 0; i < CSCOPE_MAX_CONNECTIONS; i++)
+    {
+	if (csinfo[i].fname == NULL)
+	    continue;
+
+	/* send cmd to cscope */
+	(void)fprintf(csinfo[i].to_fp, "%s\n", cmd);
+	(void)fflush(csinfo[i].to_fp);
+
+	nummatches[i] = cs_cnt_matches(i);
+
+	if (nummatches[i] > -1)
+	    totmatches += nummatches[i];
+
+	if (nummatches[i] == 0)
+	    (void)cs_read_prompt(i);
+    }
+    vim_free(cmd);
+
+    if (totmatches == 0)
+    {
+	char *nf = _("E259: no matches found for cscope query %s of %s");
+	char *buf;
+
+	if (!verbose)
+	    return FALSE;
+
+	buf = (char *)alloc(strlen(opt) + strlen(pat) + strlen(nf));
+	if (buf == NULL)
+	    (void)EMSG(nf);
+	else
+	{
+	    sprintf(buf, nf, opt, pat);
+	    (void)EMSG(buf);
+	    vim_free(buf);
+	}
+	return FALSE;
+    }
+
+#ifdef FEAT_QUICKFIX
+    /* get cmd letter */
+    switch (opt[0])
+    {
+    case '0' :
+	cmdletter = 's';
+	break;
+    case '1' :
+	cmdletter = 'g';
+	break;
+    case '2' :
+	cmdletter = 'd';
+	break;
+    case '3' :
+	cmdletter = 'c';
+	break;
+    case '4' :
+	cmdletter = 't';
+	break;
+    case '6' :
+	cmdletter = 'e';
+	break;
+    case '7' :
+	cmdletter = 'f';
+	break;
+    case '8' :
+	cmdletter = 'i';
+	break;
+    default :
+	cmdletter = opt[0];
+    }
+
+    qfpos = (char *)vim_strchr(p_csqf, cmdletter);
+    if (qfpos != NULL)
+    {
+	qfpos++;
+	/* next symbol must be + or - */
+	if (strchr(CSQF_FLAGS, *qfpos) == NULL)
+	{
+	    char *nf = _("E469: invalid cscopequickfix flag %c for %c");
+	    char *buf = (char *)alloc(strlen(nf));
+
+	    /* strlen will be enough because we use chars */
+	    if (buf != NULL)
+	    {
+		sprintf(buf, nf, *qfpos, *(qfpos-1));
+		(void)EMSG(buf);
+		vim_free(buf);
+	    }
+	    return FALSE;
+	}
+    }
+    if (qfpos != NULL && *qfpos != '0' && totmatches > 1)
+    {
+	/* fill error list */
+	FILE *f;
+	char_u *tmp = vim_tempname('c');
+
+	f = fopen((char *)tmp, "w");
+	cs_file_results(f, nummatches);
+	fclose(f);
+	/* '-' starts a new error list */
+	if (qf_init(tmp, (char_u *)"%f%*\\t%l%*\\t%m", *qfpos == '-') > 0)
+	{
+# ifdef FEAT_WINDOWS
+	    if (postponed_split != 0)
+	    {
+		win_split(postponed_split > 0 ? postponed_split : 0,
+						       postponed_split_flags);
+#  ifdef FEAT_SCROLLBIND
+		curwin->w_p_scb = FALSE;
+#  endif
+		postponed_split = 0;
+	    }
+# endif
+	    qf_jump(0, 0, forceit);
+	}
+	mch_remove(tmp);
+	vim_free(tmp);
+	return TRUE;
+    }
+    else
+#endif /* FEAT_QUICKFIX */
+    {
+	/* read output */
+	cs_fill_results((char *)pat, totmatches, nummatches, &matches,
+							 &contexts, &matched);
+	if (matches == NULL)
+	    return FALSE;
+
+	(void)cs_manage_matches(matches, contexts, totmatches, Store);
+
+	return do_tag((char_u *)pat, DT_CSCOPE, 0, forceit, verbose);
+    }
+
+} /* cs_find_common */
+
+/*
+ * PRIVATE: cs_help
+ *
+ * print help
+ */
+/* ARGSUSED */
+    static int
+cs_help(eap)
+    exarg_T *eap;
+{
+    cscmd_T *cmdp = cs_cmds;
+
+    (void)MSG_PUTS(_("cscope commands:\n"));
+    while (cmdp->name != NULL)
+    {
+	(void)smsg((char_u *)_("%-5s: %-30s (Usage: %s)"),
+				      cmdp->name, _(cmdp->help), cmdp->usage);
+	if (strcmp(cmdp->name, "find") == 0)
+	    MSG_PUTS(FIND_HELP);
+	cmdp++;
+    }
+
+    wait_return(TRUE);
+    return 0;
+} /* cs_help */
+
+
+/*
+ * PRIVATE: cs_init
+ *
+ * initialize cscope structure if not already
+ */
+    static void
+cs_init()
+{
+    short i;
+    static int init_already = FALSE;
+
+    if (init_already)
+	return;
+
+    for (i = 0; i < CSCOPE_MAX_CONNECTIONS; i++)
+	clear_csinfo(i);
+
+    init_already = TRUE;
+} /* cs_init */
+
+    static void
+clear_csinfo(i)
+    int	    i;
+{
+    csinfo[i].fname  = NULL;
+    csinfo[i].ppath  = NULL;
+    csinfo[i].flags  = NULL;
+#if defined(UNIX)
+    csinfo[i].st_dev = (dev_t)0;
+    csinfo[i].st_ino = (ino_t)0;
+#else
+    csinfo[i].nVolume = 0;
+    csinfo[i].nIndexHigh = 0;
+    csinfo[i].nIndexLow = 0;
+#endif
+    csinfo[i].pid    = -1;
+    csinfo[i].fr_fp  = NULL;
+    csinfo[i].to_fp  = NULL;
+}
+
+#ifndef UNIX
+static char *GetWin32Error __ARGS((void));
+
+    static char *
+GetWin32Error()
+{
+    char *msg = NULL;
+    FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
+	    NULL, GetLastError(), 0, (LPSTR)&msg, 0, NULL);
+    if (msg != NULL)
+    {
+	/* remove trailing \r\n */
+	char *pcrlf = strstr(msg, "\r\n");
+	if (pcrlf != NULL)
+	    *pcrlf = '\0';
+    }
+    return msg;
+}
+#endif
+/*
+ * PRIVATE: cs_insert_filelist
+ *
+ * insert a new cscope database filename into the filelist
+ */
+    static int
+cs_insert_filelist(fname, ppath, flags, sb)
+    char *fname;
+    char *ppath;
+    char *flags;
+    struct stat *sb;
+{
+    short	i, j;
+#ifndef UNIX
+    HANDLE	hFile;
+    BY_HANDLE_FILE_INFORMATION bhfi;
+
+    vim_memset(&bhfi, 0, sizeof(bhfi));
+    /* On windows 9x GetFileInformationByHandle doesn't work, so skip it */
+    if (!mch_windows95())
+    {
+	hFile = CreateFile(fname, FILE_READ_ATTRIBUTES, 0, NULL, OPEN_EXISTING,
+						 FILE_ATTRIBUTE_NORMAL, NULL);
+	if (hFile == INVALID_HANDLE_VALUE)
+	{
+	    if (p_csverbose)
+	    {
+		char *cant_msg = _("E625: cannot open cscope database: %s");
+		char *winmsg = GetWin32Error();
+
+		if (winmsg != NULL)
+		{
+		    (void)EMSG2(cant_msg, winmsg);
+		    LocalFree(winmsg);
+		}
+		else
+		    /* subst filename if can't get error text */
+		    (void)EMSG2(cant_msg, fname);
+	    }
+	    return -1;
+	}
+	if (!GetFileInformationByHandle(hFile, &bhfi))
+	{
+	    CloseHandle(hFile);
+	    if (p_csverbose)
+		(void)EMSG(_("E626: cannot get cscope database information"));
+	    return -1;
+	}
+	CloseHandle(hFile);
+    }
+#endif
+
+    i = -1; /* can be set to the index of an empty item in csinfo */
+    for (j = 0; j < CSCOPE_MAX_CONNECTIONS; j++)
+    {
+	if (csinfo[j].fname != NULL
+#if defined(UNIX)
+	    && csinfo[j].st_dev == sb->st_dev && csinfo[j].st_ino == sb->st_ino
+#else
+	    /* compare pathnames first */
+	    && ((fullpathcmp(csinfo[j].fname, fname, FALSE) & FPC_SAME)
+		/* if not Windows 9x, test index file atributes too */
+		|| (!mch_windows95()
+		    && csinfo[j].nVolume == bhfi.dwVolumeSerialNumber
+		    && csinfo[j].nIndexHigh == bhfi.nFileIndexHigh
+		    && csinfo[j].nIndexLow == bhfi.nFileIndexLow))
+#endif
+	    )
+	{
+	    if (p_csverbose)
+		(void)EMSG(_("E568: duplicate cscope database not added"));
+	    return -1;
+	}
+
+	if (csinfo[j].fname == NULL && i == -1)
+	    i = j; /* remember first empty entry */
+    }
+
+    if (i == -1)
+    {
+	if (p_csverbose)
+	    (void)EMSG(_("E569: maximum number of cscope connections reached"));
+	return -1;
+    }
+
+    if ((csinfo[i].fname = (char *)alloc(strlen(fname)+1)) == NULL)
+	return -1;
+
+    (void)strcpy(csinfo[i].fname, (const char *)fname);
+
+    if (ppath != NULL)
+    {
+	if ((csinfo[i].ppath = (char *)alloc(strlen(ppath) + 1)) == NULL)
+	{
+	    vim_free(csinfo[i].fname);
+	    csinfo[i].fname = NULL;
+	    return -1;
+	}
+	(void)strcpy(csinfo[i].ppath, (const char *)ppath);
+    } else
+	csinfo[i].ppath = NULL;
+
+    if (flags != NULL)
+    {
+	if ((csinfo[i].flags = (char *)alloc(strlen(flags) + 1)) == NULL)
+	{
+	    vim_free(csinfo[i].fname);
+	    vim_free(csinfo[i].ppath);
+	    csinfo[i].fname = NULL;
+	    csinfo[i].ppath = NULL;
+	    return -1;
+	}
+	(void)strcpy(csinfo[i].flags, (const char *)flags);
+    } else
+	csinfo[i].flags = NULL;
+
+#if defined(UNIX)
+    csinfo[i].st_dev = sb->st_dev;
+    csinfo[i].st_ino = sb->st_ino;
+
+#else
+    csinfo[i].nVolume = bhfi.dwVolumeSerialNumber;
+    csinfo[i].nIndexLow = bhfi.nFileIndexLow;
+    csinfo[i].nIndexHigh = bhfi.nFileIndexHigh;
+#endif
+    return i;
+} /* cs_insert_filelist */
+
+
+/*
+ * PRIVATE: cs_lookup_cmd
+ *
+ * find cscope command in command table
+ */
+    static cscmd_T *
+cs_lookup_cmd(eap)
+    exarg_T *eap;
+{
+    cscmd_T *cmdp;
+    char *stok;
+    size_t len;
+
+    if (eap->arg == NULL)
+	return NULL;
+
+    if ((stok = strtok((char *)(eap->arg), (const char *)" ")) == NULL)
+	return NULL;
+
+    len = strlen(stok);
+    for (cmdp = cs_cmds; cmdp->name != NULL; ++cmdp)
+    {
+	if (strncmp((const char *)(stok), cmdp->name, len) == 0)
+	    return (cmdp);
+    }
+    return NULL;
+} /* cs_lookup_cmd */
+
+
+/*
+ * PRIVATE: cs_kill
+ *
+ * nuke em
+ */
+/* ARGSUSED */
+    static int
+cs_kill(eap)
+    exarg_T *eap;
+{
+    char *stok;
+    short i;
+
+    if ((stok = strtok((char *)NULL, (const char *)" ")) == NULL)
+    {
+	cs_usage_msg(Kill);
+	return CSCOPE_FAILURE;
+    }
+
+    /* only single digit positive and negative integers are allowed */
+    if ((strlen(stok) < 2 && VIM_ISDIGIT((int)(stok[0])))
+	    || (strlen(stok) < 3 && stok[0] == '-'
+					      && VIM_ISDIGIT((int)(stok[1]))))
+	i = atoi(stok);
+    else
+    {
+	/* It must be part of a name.  We will try to find a match
+	 * within all the names in the csinfo data structure
+	 */
+	for (i = 0; i < CSCOPE_MAX_CONNECTIONS; i++)
+	{
+	    if (csinfo[i].fname != NULL && strstr(csinfo[i].fname, stok))
+		break;
+	}
+    }
+
+    if ((i >= CSCOPE_MAX_CONNECTIONS || i < -1 || csinfo[i].fname == NULL)
+	    && i != -1)
+    {
+	if (p_csverbose)
+	    (void)EMSG2(_("E261: cscope connection %s not found"), stok);
+    }
+    else
+    {
+	if (i == -1)
+	{
+	    for (i = 0; i < CSCOPE_MAX_CONNECTIONS; i++)
+	    {
+		if (csinfo[i].fname)
+		    cs_kill_execute(i, csinfo[i].fname);
+	    }
+	}
+	else
+	    cs_kill_execute(i, stok);
+    }
+
+    return 0;
+} /* cs_kill */
+
+
+/*
+ * PRIVATE: cs_kill_execute
+ *
+ * Actually kills a specific cscope connection.
+ */
+    static void
+cs_kill_execute(i, cname)
+    int i;	    /* cscope table index */
+    char *cname;    /* cscope database name */
+{
+    if (p_csverbose)
+    {
+	msg_clr_eos();
+	(void)smsg_attr(hl_attr(HLF_R) | MSG_HIST,
+		(char_u *)_("cscope connection %s closed"), cname);
+    }
+    cs_release_csp(i, TRUE);
+}
+
+
+/*
+ * PRIVATE: cs_make_vim_style_matches
+ *
+ * convert the cscope output into into a ctags style entry (as might be found
+ * in a ctags tags file).  there's one catch though: cscope doesn't tell you
+ * the type of the tag you are looking for.  for example, in Darren Hiebert's
+ * ctags (the one that comes with vim), #define's use a line number to find the
+ * tag in a file while function definitions use a regexp search pattern.
+ *
+ * i'm going to always use the line number because cscope does something
+ * quirky (and probably other things i don't know about):
+ *
+ *     if you have "#  define" in your source file, which is
+ *     perfectly legal, cscope thinks you have "#define".  this
+ *     will result in a failed regexp search. :(
+ *
+ * besides, even if this particular case didn't happen, the search pattern
+ * would still have to be modified to escape all the special regular expression
+ * characters to comply with ctags formatting.
+ */
+    static char *
+cs_make_vim_style_matches(fname, slno, search, tagstr)
+    char *fname;
+    char *slno;
+    char *search;
+    char *tagstr;
+{
+    /* vim style is ctags:
+     *
+     *	    <tagstr>\t<filename>\t<linenum_or_search>"\t<extra>
+     *
+     * but as mentioned above, we'll always use the line number and
+     * put the search pattern (if one exists) as "extra"
+     *
+     * buf is used as part of vim's method of handling tags, and
+     * (i think) vim frees it when you pop your tags and get replaced
+     * by new ones on the tag stack.
+     */
+    char *buf;
+    int amt;
+
+    if (search != NULL)
+    {
+	amt = strlen(fname) + strlen(slno) + strlen(tagstr) + strlen(search)+6;
+	if ((buf = (char *)alloc(amt)) == NULL)
+	    return NULL;
+
+	(void)sprintf(buf, "%s\t%s\t%s;\"\t%s", tagstr, fname, slno, search);
+    }
+    else
+    {
+	amt = strlen(fname) + strlen(slno) + strlen(tagstr) + 5;
+	if ((buf = (char *)alloc(amt)) == NULL)
+	    return NULL;
+
+	(void)sprintf(buf, "%s\t%s\t%s;\"", tagstr, fname, slno);
+    }
+
+    return buf;
+} /* cs_make_vim_style_matches */
+
+
+/*
+ * PRIVATE: cs_manage_matches
+ *
+ * this is kind of hokey, but i don't see an easy way round this..
+ *
+ * Store: keep a ptr to the (malloc'd) memory of matches originally
+ * generated from cs_find().  the matches are originally lines directly
+ * from cscope output, but transformed to look like something out of a
+ * ctags.  see cs_make_vim_style_matches for more details.
+ *
+ * Get: used only from cs_fgets(), this simulates a vim_fgets() to return
+ * the next line from the cscope output.  it basically keeps track of which
+ * lines have been "used" and returns the next one.
+ *
+ * Free: frees up everything and resets
+ *
+ * Print: prints the tags
+ */
+    static char *
+cs_manage_matches(matches, contexts, totmatches, cmd)
+    char **matches;
+    char **contexts;
+    int totmatches;
+    mcmd_e cmd;
+{
+    static char **mp = NULL;
+    static char **cp = NULL;
+    static int cnt = -1;
+    static int next = -1;
+    char *p = NULL;
+
+    switch (cmd)
+    {
+    case Store:
+	assert(matches != NULL);
+	assert(totmatches > 0);
+	if (mp != NULL || cp != NULL)
+	    (void)cs_manage_matches(NULL, NULL, -1, Free);
+	mp = matches;
+	cp = contexts;
+	cnt = totmatches;
+	next = 0;
+	break;
+    case Get:
+	if (next >= cnt)
+	    return NULL;
+
+	p = mp[next];
+	next++;
+	break;
+    case Free:
+	if (mp != NULL)
+	{
+	    if (cnt > 0)
+		while (cnt--)
+		{
+		    vim_free(mp[cnt]);
+		    if (cp != NULL)
+			vim_free(cp[cnt]);
+		}
+	    vim_free(mp);
+	    vim_free(cp);
+	}
+	mp = NULL;
+	cp = NULL;
+	cnt = 0;
+	next = 0;
+	break;
+    case Print:
+	cs_print_tags_priv(mp, cp, cnt);
+	break;
+    default:	/* should not reach here */
+	(void)EMSG(_("E570: fatal error in cs_manage_matches"));
+	return NULL;
+    }
+
+    return p;
+} /* cs_manage_matches */
+
+
+/*
+ * PRIVATE: cs_parse_results
+ *
+ * parse cscope output
+ */
+    static char *
+cs_parse_results(cnumber, buf, bufsize, context, linenumber, search)
+    int cnumber;
+    char *buf;
+    int bufsize;
+    char **context;
+    char **linenumber;
+    char **search;
+{
+    int ch;
+    char *p;
+    char *name;
+
+    if (fgets(buf, bufsize, csinfo[cnumber].fr_fp) == NULL)
+    {
+	if (feof(csinfo[cnumber].fr_fp))
+	    errno = EIO;
+
+	cs_reading_emsg(cnumber);
+
+	return NULL;
+    }
+
+	/* If the line's too long for the buffer, discard it. */
+    if ((p = strchr(buf, '\n')) == NULL)
+    {
+	while ((ch = getc(csinfo[cnumber].fr_fp)) != EOF && ch != '\n')
+	    ;
+	return NULL;
+    }
+    *p = '\0';
+
+    /*
+     * cscope output is in the following format:
+     *
+     *	<filename> <context> <line number> <pattern>
+     */
+    if ((name = strtok((char *)buf, (const char *)" ")) == NULL)
+	return NULL;
+    if ((*context = strtok(NULL, (const char *)" ")) == NULL)
+	return NULL;
+    if ((*linenumber = strtok(NULL, (const char *)" ")) == NULL)
+	return NULL;
+    *search = *linenumber + strlen(*linenumber) + 1;	/* +1 to skip \0 */
+
+    /* --- nvi ---
+     * If the file is older than the cscope database, that is,
+     * the database was built since the file was last modified,
+     * or there wasn't a search string, use the line number.
+     */
+    if (strcmp(*search, "<unknown>") == 0)
+	*search = NULL;
+
+    name = cs_resolve_file(cnumber, name);
+    return name;
+}
+
+/*
+ * PRIVATE: cs_file_results
+ *
+ * write cscope find results to file
+ */
+    static void
+cs_file_results(f, nummatches_a)
+    FILE *f;
+    int *nummatches_a;
+{
+    int i, j;
+    char *buf;
+    char *search, *slno;
+    char *fullname;
+    char *cntx;
+    char *context;
+
+    buf = (char *)alloc(CSREAD_BUFSIZE);
+    if (buf == NULL)
+	return;
+
+    for (i = 0; i < CSCOPE_MAX_CONNECTIONS; i++)
+    {
+	if (nummatches_a[i] < 1)
+	    continue;
+
+	for (j = 0; j < nummatches_a[i]; j++)
+	{
+	   if ((fullname=cs_parse_results(i, buf, CSREAD_BUFSIZE, &cntx,
+			   &slno, &search))==NULL)
+	       continue;
+
+	   context = (char *)alloc(strlen(cntx)+5);
+	   if (context==NULL)
+	       continue;
+
+	   if (strcmp(cntx, "<global>")==0)
+	       strcpy(context, "<<global>>");
+	   else
+	       sprintf(context, "<<%s>>", cntx);
+
+	   if (search==NULL)
+	       fprintf(f, "%s\t%s\t%s\n", fullname, slno, context);
+	   else
+	       fprintf(f, "%s\t%s\t%s %s\n", fullname, slno, context, search);
+
+	   vim_free(context);
+	   vim_free(fullname);
+	} /* for all matches */
+
+	(void)cs_read_prompt(i);
+
+    } /* for all cscope connections */
+    vim_free(buf);
+}
+
+/*
+ * PRIVATE: cs_fill_results
+ *
+ * get parsed cscope output and calls cs_make_vim_style_matches to convert
+ * into ctags format
+ */
+    static void
+cs_fill_results(tagstr, totmatches, nummatches_a, matches_p, cntxts_p, matched)
+    char *tagstr;
+    int totmatches;
+    int *nummatches_a;
+    char ***matches_p;
+    char ***cntxts_p;
+    int *matched;
+{
+    int i, j;
+    char *buf;
+    char *search, *slno;
+    int totsofar = 0;
+    char **matches = NULL;
+    char **cntxts = NULL;
+    char *fullname;
+    char *cntx;
+
+    assert(totmatches > 0);
+
+    buf = (char *)alloc(CSREAD_BUFSIZE);
+    if (buf == NULL)
+	return;
+
+    if ((matches = (char **)alloc(sizeof(char *) * totmatches)) == NULL)
+	goto parse_out;
+    if ((cntxts = (char **)alloc(sizeof(char *) * totmatches)) == NULL)
+	goto parse_out;
+
+    for (i = 0; i < CSCOPE_MAX_CONNECTIONS; i++)
+    {
+	if (nummatches_a[i] < 1)
+	    continue;
+
+	for (j = 0; j < nummatches_a[i]; j++)
+	{
+	   if ((fullname = cs_parse_results(i, buf, CSREAD_BUFSIZE, &cntx,
+			   &slno, &search)) == NULL)
+		continue;
+
+	    matches[totsofar] = cs_make_vim_style_matches(fullname, slno,
+							  search, tagstr);
+
+	    vim_free(fullname);
+
+	    if (strcmp(cntx, "<global>") == 0)
+		cntxts[totsofar] = NULL;
+	    else
+		/* note: if vim_strsave returns NULL, then the context
+		 * will be "<global>", which is misleading.
+		 */
+		cntxts[totsofar] = (char *)vim_strsave((char_u *)cntx);
+
+	    if (matches[totsofar] != NULL)
+		totsofar++;
+
+	} /* for all matches */
+
+	(void)cs_read_prompt(i);
+
+    } /* for all cscope connections */
+
+parse_out:
+    *matched = totsofar;
+    *matches_p = matches;
+    *cntxts_p = cntxts;
+    vim_free(buf);
+} /* cs_fill_results */
+
+
+/* get the requested path components */
+    static char *
+cs_pathcomponents(path)
+    char	*path;
+{
+    int		i;
+    char	*s;
+
+    if (p_cspc == 0)
+	return path;
+
+    s = path + strlen(path) - 1;
+    for (i = 0; i < p_cspc; ++i)
+	while (s > path && *--s != '/'
+#ifdef WIN32
+		&& *--s != '\\'
+#endif
+		)
+	    ;
+    if ((s > path && *s == '/')
+#ifdef WIN32
+	|| (s > path && *s == '\\')
+#endif
+	    )
+	++s;
+    return s;
+}
+
+/*
+ * PRIVATE: cs_print_tags_priv
+ *
+ * called from cs_manage_matches()
+ */
+    static void
+cs_print_tags_priv(matches, cntxts, num_matches)
+    char **matches;
+    char **cntxts;
+    int num_matches;
+{
+    char	*buf = NULL;
+    int		bufsize = 0; /* Track available bufsize */
+    int		newsize = 0;
+    char	*ptag;
+    char	*fname, *lno, *extra, *tbuf;
+    int		i, idx, num;
+    char	*globalcntx = "GLOBAL";
+    char	*cntxformat = " <<%s>>";
+    char	*context;
+    char	*cstag_msg = _("Cscope tag: %s");
+    char	*csfmt_str = "%4d %6s  ";
+
+    assert (num_matches > 0);
+
+    if ((tbuf = (char *)alloc(strlen(matches[0]) + 1)) == NULL)
+	return;
+
+    strcpy(tbuf, matches[0]);
+    ptag = strtok(tbuf, "\t");
+
+    newsize = strlen(cstag_msg) + strlen(ptag);
+    buf = (char *)alloc(newsize);
+    if (buf != NULL)
+    {
+	bufsize = newsize;
+	(void)sprintf(buf, cstag_msg, ptag);
+	MSG_PUTS_ATTR(buf, hl_attr(HLF_T));
+    }
+
+    vim_free(tbuf);
+
+    MSG_PUTS_ATTR(_("\n   #   line"), hl_attr(HLF_T));    /* strlen is 7 */
+    msg_advance(msg_col + 2);
+    MSG_PUTS_ATTR(_("filename / context / line\n"), hl_attr(HLF_T));
+
+    num = 1;
+    for (i = 0; i < num_matches; i++)
+    {
+	idx = i;
+
+	/* if we really wanted to, we could avoid this malloc and strcpy
+	 * by parsing matches[i] on the fly and placing stuff into buf
+	 * directly, but that's too much of a hassle
+	 */
+	if ((tbuf = (char *)alloc(strlen(matches[idx]) + 1)) == NULL)
+	    continue;
+	(void)strcpy(tbuf, matches[idx]);
+
+	if ((fname = strtok(tbuf, (const char *)"\t")) == NULL)
+	    continue;
+	if ((fname = strtok(NULL, (const char *)"\t")) == NULL)
+	    continue;
+	if ((lno = strtok(NULL, (const char *)"\t")) == NULL)
+	{
+	    /* if NULL, then no "extra", although in cscope's case, there
+	     * should always be "extra".
+	     */
+	    extra = NULL;
+	}
+
+	extra = lno + strlen(lno) + 1;
+
+	lno[strlen(lno)-2] = '\0';  /* ignore ;" at the end */
+
+	/* hopefully 'num' (num of matches) will be less than 10^16 */
+	newsize = strlen(csfmt_str) + 16 + strlen(lno);
+	if (bufsize < newsize)
+	{
+	    buf = (char *)vim_realloc(buf, newsize);
+	    if (buf == NULL)
+		bufsize = 0;
+	    else
+		bufsize = newsize;
+	}
+	if (buf != NULL)
+	{
+	    /* csfmt_str = "%4d %6s  "; */
+	    (void)sprintf(buf, csfmt_str, num, lno);
+	    MSG_PUTS_ATTR(buf, hl_attr(HLF_CM));
+	}
+	MSG_PUTS_LONG_ATTR(cs_pathcomponents(fname), hl_attr(HLF_CM));
+
+	/* compute the required space for the context */
+	if (cntxts[idx] != NULL)
+	    context = cntxts[idx];
+	else
+	    context = globalcntx;
+	newsize = strlen(context) + strlen(cntxformat);
+
+	if (bufsize < newsize)
+	{
+	    buf = (char *)vim_realloc(buf, newsize);
+	    if (buf == NULL)
+		bufsize = 0;
+	    else
+		bufsize = newsize;
+	}
+	if (buf != NULL)
+	{
+	    (void)sprintf(buf, cntxformat, context);
+
+	    /* print the context only if it fits on the same line */
+	    if (msg_col + (int)strlen(buf) >= (int)Columns)
+		msg_putchar('\n');
+	    msg_advance(12);
+	    MSG_PUTS_LONG(buf);
+	    msg_putchar('\n');
+	}
+	if (extra != NULL)
+	{
+	    msg_advance(13);
+	    MSG_PUTS_LONG(extra);
+	}
+
+	vim_free(tbuf); /* only after printing extra due to strtok use */
+
+	if (msg_col)
+	    msg_putchar('\n');
+
+	ui_breakcheck();
+	if (got_int)
+	{
+	    got_int = FALSE;	/* don't print any more matches */
+	    break;
+	}
+
+	num++;
+    } /* for all matches */
+
+    vim_free(buf);
+} /* cs_print_tags_priv */
+
+
+/*
+ * PRIVATE: cs_read_prompt
+ *
+ * read a cscope prompt (basically, skip over the ">> ")
+ */
+    static int
+cs_read_prompt(i)
+    int i;
+{
+    int		ch;
+    char	*buf = NULL; /* buffer for possible error message from cscope */
+    int		bufpos = 0;
+    char	*cs_emsg;
+    int		maxlen;
+    static char *eprompt = "Press the RETURN key to continue:";
+    int		epromptlen = strlen(eprompt);
+    int		n;
+
+    cs_emsg = _("E609: Cscope error: %s");
+    /* compute maximum allowed len for Cscope error message */
+    maxlen = (int)(IOSIZE - strlen(cs_emsg));
+
+    for (;;)
+    {
+	while ((ch = getc(csinfo[i].fr_fp)) != EOF && ch != CSCOPE_PROMPT[0])
+	    /* if there is room and char is printable */
+	    if (bufpos < maxlen - 1 && vim_isprintc(ch))
+	    {
+		if (buf == NULL) /* lazy buffer allocation */
+		    buf = (char *)alloc(maxlen);
+		if (buf != NULL)
+		{
+		    /* append character to the message */
+		    buf[bufpos++] = ch;
+		    buf[bufpos] = NUL;
+		    if (bufpos >= epromptlen
+			    && strcmp(&buf[bufpos - epromptlen], eprompt) == 0)
+		    {
+			/* remove eprompt from buf */
+			buf[bufpos - epromptlen] = NUL;
+
+			/* print message to user */
+			(void)EMSG2(cs_emsg, buf);
+
+			/* send RETURN to cscope */
+			(void)putc('\n', csinfo[i].to_fp);
+			(void)fflush(csinfo[i].to_fp);
+
+			/* clear buf */
+			bufpos = 0;
+			buf[bufpos] = NUL;
+		    }
+		}
+	    }
+
+	for (n = 0; n < (int)strlen(CSCOPE_PROMPT); ++n)
+	{
+	    if (n > 0)
+		ch = getc(csinfo[i].fr_fp);
+	    if (ch == EOF)
+	    {
+		PERROR("cs_read_prompt EOF");
+		if (buf != NULL && buf[0] != NUL)
+		    (void)EMSG2(cs_emsg, buf);
+		else if (p_csverbose)
+		    cs_reading_emsg(i); /* don't have additional information */
+		cs_release_csp(i, TRUE);
+		vim_free(buf);
+		return CSCOPE_FAILURE;
+	    }
+
+	    if (ch != CSCOPE_PROMPT[n])
+	    {
+		ch = EOF;
+		break;
+	    }
+	}
+
+	if (ch == EOF)
+	    continue;	    /* didn't find the prompt */
+	break;		    /* did find the prompt */
+    }
+
+    vim_free(buf);
+    return CSCOPE_SUCCESS;
+}
+
+
+/*
+ * PRIVATE: cs_release_csp
+ *
+ * does the actual free'ing for the cs ptr with an optional flag of whether
+ * or not to free the filename.  called by cs_kill and cs_reset.
+ */
+    static void
+cs_release_csp(i, freefnpp)
+    int i;
+    int freefnpp;
+{
+#if defined(UNIX)
+    int pstat;
+#else
+    /*
+     * Trying to exit normally (not sure whether it is fit to UNIX cscope
+     */
+    if (csinfo[i].to_fp != NULL)
+    {
+	(void)fputs("q\n", csinfo[i].to_fp);
+	(void)fflush(csinfo[i].to_fp);
+    }
+    /* give cscope chance to exit normally */
+    if (csinfo[i].hProc > 0
+	    && WaitForSingleObject(csinfo[i].hProc, 1000) == WAIT_TIMEOUT)
+	TerminateProcess(csinfo[i].hProc, 0);
+#endif
+
+    if (csinfo[i].fr_fp != NULL)
+	(void)fclose(csinfo[i].fr_fp);
+    if (csinfo[i].to_fp != NULL)
+	(void)fclose(csinfo[i].to_fp);
+
+    /*
+     * Safety check: If the PID would be zero here, the entire X session would
+     * be killed.  -1 and 1 are dangerous as well.
+     */
+#if defined(UNIX)
+    if (csinfo[i].pid > 1)
+    {
+	kill(csinfo[i].pid, SIGTERM);
+	(void)waitpid(csinfo[i].pid, &pstat, 0);
+    }
+#endif
+
+    if (freefnpp)
+    {
+	vim_free(csinfo[i].fname);
+	vim_free(csinfo[i].ppath);
+	vim_free(csinfo[i].flags);
+    }
+
+    clear_csinfo(i);
+} /* cs_release_csp */
+
+
+/*
+ * PRIVATE: cs_reset
+ *
+ * calls cs_kill on all cscope connections then reinits
+ */
+/* ARGSUSED */
+    static int
+cs_reset(eap)
+    exarg_T *eap;
+{
+    char	**dblist = NULL, **pplist = NULL, **fllist = NULL;
+    int	i;
+    char buf[8]; /* for sprintf " (#%d)" */
+
+    /* malloc our db and ppath list */
+    dblist = (char **)alloc(CSCOPE_MAX_CONNECTIONS * sizeof(char *));
+    pplist = (char **)alloc(CSCOPE_MAX_CONNECTIONS * sizeof(char *));
+    fllist = (char **)alloc(CSCOPE_MAX_CONNECTIONS * sizeof(char *));
+    if (dblist == NULL || pplist == NULL || fllist == NULL)
+    {
+	vim_free(dblist);
+	vim_free(pplist);
+	vim_free(fllist);
+	return CSCOPE_FAILURE;
+    }
+
+    for (i = 0; i < CSCOPE_MAX_CONNECTIONS; i++)
+    {
+	dblist[i] = csinfo[i].fname;
+	pplist[i] = csinfo[i].ppath;
+	fllist[i] = csinfo[i].flags;
+	if (csinfo[i].fname != NULL)
+	    cs_release_csp(i, FALSE);
+    }
+
+    /* rebuild the cscope connection list */
+    for (i = 0; i < CSCOPE_MAX_CONNECTIONS; i++)
+    {
+	if (dblist[i] != NULL)
+	{
+	    cs_add_common(dblist[i], pplist[i], fllist[i]);
+	    if (p_csverbose)
+	    {
+		/* dont' use smsg_attr because want to display
+		 * connection number in the same line as
+		 * "Added cscope database..."
+		 */
+		sprintf(buf, " (#%d)", i);
+		MSG_PUTS_ATTR(buf, hl_attr(HLF_R));
+	    }
+	}
+	vim_free(dblist[i]);
+	vim_free(pplist[i]);
+	vim_free(fllist[i]);
+    }
+    vim_free(dblist);
+    vim_free(pplist);
+    vim_free(fllist);
+
+    if (p_csverbose)
+	MSG_ATTR(_("All cscope databases reset"), hl_attr(HLF_R) | MSG_HIST);
+    return CSCOPE_SUCCESS;
+} /* cs_reset */
+
+
+/*
+ * PRIVATE: cs_resolve_file
+ *
+ * construct the full pathname to a file found in the cscope database.
+ * (Prepends ppath, if there is one and if it's not already prepended,
+ * otherwise just uses the name found.)
+ *
+ * we need to prepend the prefix because on some cscope's (e.g., the one that
+ * ships with Solaris 2.6), the output never has the prefix prepended.
+ * contrast this with my development system (Digital Unix), which does.
+ */
+    static char *
+cs_resolve_file(i, name)
+    int i;
+    char *name;
+{
+    char *fullname;
+    int len;
+
+    /*
+     * ppath is freed when we destroy the cscope connection.
+     * fullname is freed after cs_make_vim_style_matches, after it's been
+     * copied into the tag buffer used by vim
+     */
+    len = strlen(name) + 2;
+    if (csinfo[i].ppath != NULL)
+	len += strlen(csinfo[i].ppath);
+
+    if ((fullname = (char *)alloc(len)) == NULL)
+	return NULL;
+
+    /*
+     * note/example: this won't work if the cscope output already starts
+     * "../.." and the prefix path is also "../..".  if something like this
+     * happens, you are screwed up and need to fix how you're using cscope.
+     */
+    if (csinfo[i].ppath != NULL &&
+	(strncmp(name, csinfo[i].ppath, strlen(csinfo[i].ppath)) != 0) &&
+	(name[0] != '/')
+#ifdef WIN32
+	&& name[0] != '\\' && name[1] != ':'
+#endif
+	)
+	(void)sprintf(fullname, "%s/%s", csinfo[i].ppath, name);
+    else
+	(void)sprintf(fullname, "%s", name);
+
+    return fullname;
+} /* cs_resolve_file */
+
+
+/*
+ * PRIVATE: cs_show
+ *
+ * show all cscope connections
+ */
+/* ARGSUSED */
+    static int
+cs_show(eap)
+    exarg_T *eap;
+{
+    short i;
+    if (cs_cnt_connections() == 0)
+	MSG_PUTS(_("no cscope connections\n"));
+    else
+    {
+	MSG_PUTS_ATTR(
+	    _(" # pid    database name                       prepend path\n"),
+	    hl_attr(HLF_T));
+	for (i = 0; i < CSCOPE_MAX_CONNECTIONS; i++)
+	{
+	    if (csinfo[i].fname == NULL)
+		continue;
+
+	    if (csinfo[i].ppath != NULL)
+		(void)smsg((char_u *)"%2d %-5ld  %-34s  %-32s",
+		    i, (long)csinfo[i].pid, csinfo[i].fname, csinfo[i].ppath);
+	    else
+		(void)smsg((char_u *)"%2d %-5ld  %-34s  <none>",
+			   i, (long)csinfo[i].pid, csinfo[i].fname);
+	}
+    }
+
+    wait_return(TRUE);
+    return CSCOPE_SUCCESS;
+} /* cs_show */
+
+#endif	/* FEAT_CSCOPE */
+
+/* the end */