Merge remote-tracking branch 'upstream/master' into usermarksusermarks

1 files changed, 0 insertions, 2052 deletions

diff --git a/src/nvim/if_cscope.c b/src/nvim/if_cscope.c
deleted file mode 100644
index 689d1fce0d..0000000000
--- a/src/nvim/if_cscope.c
+++ /dev/null
@@ -1,2052 +0,0 @@
-// This is an open source non-commercial project. Dear PVS-Studio, please check
-// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
-
-/*
- * CSCOPE support for Vim added by Andy Kahn <kahn@zk3.dec.com>
- * Ported to Win32 by Sergey Khorev <sergey.khorev@gmail.com>
- *
- * 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.
- */
-
-#include <assert.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <inttypes.h>
-#include <stdbool.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-
-#include "nvim/ascii.h"
-#include "nvim/autocmd.h"
-#include "nvim/buffer.h"
-#include "nvim/charset.h"
-#include "nvim/eval.h"
-#include "nvim/event/stream.h"
-#include "nvim/ex_eval.h"
-#include "nvim/fileio.h"
-#include "nvim/if_cscope.h"
-#include "nvim/memory.h"
-#include "nvim/message.h"
-#include "nvim/os/input.h"
-#include "nvim/os/os.h"
-#include "nvim/os/time.h"
-#include "nvim/path.h"
-#include "nvim/quickfix.h"
-#include "nvim/strings.h"
-#include "nvim/tag.h"
-#include "nvim/window.h"
-#if defined(UNIX)
-# include <sys/wait.h>
-#endif
-#include "nvim/if_cscope_defs.h"
-
-#ifdef INCLUDE_GENERATED_DECLARATIONS
-# include "if_cscope.c.generated.h"
-#endif
-
-static csinfo_T *csinfo = NULL;
-static size_t csinfo_size = 0;    // number of items allocated in csinfo[]
-
-static int eap_arg_len;           // length of eap->arg, set in cs_lookup_cmd()
-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 a|c|d|e|f|g|i|s|t name", 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, NULL, NULL, NULL, 0 }
-};
-
-static void cs_usage_msg(csid_e x)
-{
-  (void)semsg(_("E560: Usage: cs[cope] %s"), cs_cmds[(int)x].usage);
-}
-
-static enum {
-  EXP_CSCOPE_SUBCMD,    // expand ":cscope" sub-commands
-  EXP_SCSCOPE_SUBCMD,   // expand ":scscope" sub-commands
-  EXP_CSCOPE_FIND,      // expand ":cscope find" arguments
-  EXP_CSCOPE_KILL,  // expand ":cscope kill" arguments
-} expand_what;
-
-/*
- * Function given to ExpandGeneric() to obtain the cscope command
- * expansion.
- */
-char *get_cscope_name(expand_T *xp, int idx)
-{
-  int current_idx;
-
-  switch (expand_what) {
-  case EXP_CSCOPE_SUBCMD:
-    // Complete with sub-commands of ":cscope":
-    // add, find, help, kill, reset, show
-    return cs_cmds[idx].name;
-  case EXP_SCSCOPE_SUBCMD: {
-    // Complete with sub-commands of ":scscope": same sub-commands as
-    // ":cscope" but skip commands which don't support split windows
-    int i;
-    for (i = 0, current_idx = 0; cs_cmds[i].name != NULL; i++) {
-      if (cs_cmds[i].cansplit) {
-        if (current_idx++ == idx) {
-          break;
-        }
-      }
-    }
-    return cs_cmds[i].name;
-  }
-  case EXP_CSCOPE_FIND: {
-    const char *query_type[] =
-    {
-      "a", "c", "d", "e", "f", "g", "i", "s", "t", NULL
-    };
-
-    // Complete with query type of ":cscope find {query_type}".
-    // {query_type} can be letters (c, d, ... a) or numbers (0, 1,
-    // ..., 9) but only complete with letters, since numbers are
-    // redundant.
-    return (char *)query_type[idx];
-  }
-  case EXP_CSCOPE_KILL: {
-    static char connection[5];
-
-    // ":cscope kill" accepts connection numbers or partial names of
-    // the pathname of the cscope database as argument.  Only complete
-    // with connection numbers. -1 can also be used to kill all
-    // connections.
-    size_t i;
-    for (i = 0, current_idx = 0; i < csinfo_size; i++) {
-      if (csinfo[i].fname == NULL) {
-        continue;
-      }
-      if (current_idx++ == idx) {
-        vim_snprintf(connection, sizeof(connection), "%zu", i);
-        return connection;
-      }
-    }
-    return (current_idx == idx && idx > 0) ? "-1" : NULL;
-  }
-  default:
-    return NULL;
-  }
-}
-
-/*
- * Handle command line completion for :cscope command.
- */
-void set_context_in_cscope_cmd(expand_T *xp, const char *arg, cmdidx_T cmdidx)
-{
-  // Default: expand subcommands.
-  xp->xp_context = EXPAND_CSCOPE;
-  xp->xp_pattern = (char *)arg;
-  expand_what = ((cmdidx == CMD_scscope)
-                 ? EXP_SCSCOPE_SUBCMD : EXP_CSCOPE_SUBCMD);
-
-  // (part of) subcommand already typed
-  if (*arg != NUL) {
-    const char *p = (const char *)skiptowhite((const char_u *)arg);
-    if (*p != NUL) {  // Past first word.
-      xp->xp_pattern = skipwhite(p);
-      if (*skiptowhite((char_u *)xp->xp_pattern) != NUL) {
-        xp->xp_context = EXPAND_NOTHING;
-      } else if (STRNICMP(arg, "add", p - arg) == 0) {
-        xp->xp_context = EXPAND_FILES;
-      } else if (STRNICMP(arg, "kill", p - arg) == 0) {
-        expand_what = EXP_CSCOPE_KILL;
-      } else if (STRNICMP(arg, "find", p - arg) == 0) {
-        expand_what = EXP_CSCOPE_FIND;
-      } else {
-        xp->xp_context = EXPAND_NOTHING;
-      }
-    }
-  }
-}
-
-/// Find the command, print help if invalid, and then call the corresponding
-/// command function.
-///
-/// @param make_split  whether to split window
-static void do_cscope_general(exarg_T *eap, int make_split)
-{
-  cscmd_T *cmdp;
-
-  if ((cmdp = cs_lookup_cmd(eap)) == NULL) {
-    cs_help(eap);
-    return;
-  }
-
-  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.cmod_split;
-    postponed_split_tab = cmdmod.cmod_tab;
-  }
-
-  cmdp->func(eap);
-
-  postponed_split_flags = 0;
-  postponed_split_tab = 0;
-}
-
-/// Implementation of ":cscope" and ":lcscope"
-void ex_cscope(exarg_T *eap)
-{
-  do_cscope_general(eap, FALSE);
-}
-
-/// Implementation of ":scscope". Same as ex_cscope(), but splits window, too.
-void ex_scscope(exarg_T *eap)
-{
-  do_cscope_general(eap, TRUE);
-}
-
-/// Implementation of ":cstag"
-void ex_cstag(exarg_T *eap)
-{
-  int ret = FALSE;
-
-  if (*eap->arg == NUL) {
-    (void)emsg(_("E562: Usage: cstag <ident>"));
-    return;
-  }
-
-  switch (p_csto) {
-  case 0:
-    if (cs_check_for_connections()) {
-      ret = cs_find_common("g", eap->arg, eap->forceit, false,
-                           false, (char_u *)(*eap->cmdlinep));
-      if (ret == false) {
-        cs_free_tags();
-        if (msg_col) {
-          msg_putchar('\n');
-        }
-
-        if (cs_check_for_tags()) {
-          ret = do_tag((char_u *)eap->arg, DT_JUMP, 0, eap->forceit, false);
-        }
-      }
-    } else if (cs_check_for_tags()) {
-      ret = do_tag((char_u *)eap->arg, DT_JUMP, 0, eap->forceit, false);
-    }
-    break;
-  case 1:
-    if (cs_check_for_tags()) {
-      ret = do_tag((char_u *)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", eap->arg, eap->forceit,
-                               false, false, (char_u *)(*eap->cmdlinep));
-          if (ret == false) {
-            cs_free_tags();
-          }
-        }
-      }
-    } else if (cs_check_for_connections()) {
-      ret = cs_find_common("g", eap->arg, eap->forceit, false,
-                           false, (char_u *)(*eap->cmdlinep));
-      if (ret == false) {
-        cs_free_tags();
-      }
-    }
-    break;
-  default:
-    break;
-  }
-
-  if (!ret) {
-    (void)emsg(_("E257: cstag: tag not found"));
-    g_do_tagpreview = 0;
-  }
-}
-
-/// This simulates a vim_fgets(), but for cscope, returns the next line
-/// from the cscope output.  should only be called from find_tags()
-///
-/// @return true if eof, FALSE otherwise
-bool cs_fgets(char_u *buf, int size)
-  FUNC_ATTR_NONNULL_ALL
-{
-  char *p;
-
-  if ((p = cs_manage_matches(NULL, NULL, 0, Get)) == NULL) {
-    return true;
-  }
-  STRLCPY(buf, p, size);
-
-  return false;
-}
-
-/// Called only from do_tag(), when popping the tag stack.
-void cs_free_tags(void)
-{
-  cs_manage_matches(NULL, NULL, 0, Free);
-}
-
-/// Called from do_tag().
-void cs_print_tags(void)
-{
-  cs_manage_matches(NULL, NULL, 0, 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!
- */
-bool cs_connection(int num, char_u *dbpath, char_u *ppath)
-{
-  if (num < 0 || num > 4 || (num > 0 && !dbpath)) {
-    return false;
-  }
-
-  for (size_t i = 0; i < csinfo_size; 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
-
-/*
- * PRIVATE functions
- ****************************************************************************/
-
-/// Add cscope database or a directory name (to look for cscope.out)
-/// to the cscope connection list.
-static int cs_add(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(char *fname)
-{
-  int err = errno;
-  (void)semsg(_("E563: stat(%s) error: %d"), fname, err);
-}
-
-/// 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.
-///
-/// @param arg1  filename - may contain environment variables
-/// @param arg2  prepend path - may contain environment variables
-static int cs_add_common(char *arg1, char *arg2, char *flags)
-{
-  char *fname = NULL;
-  char *fname2 = NULL;
-  char *ppath = NULL;
-  size_t usedlen = 0;
-  char *fbuf = NULL;
-
-  // get the filename (arg1), expand it, and try to stat it
-  fname = xmalloc(MAXPATHL + 1);
-
-  expand_env((char_u *)arg1, (char_u *)fname, MAXPATHL);
-  size_t len = STRLEN(fname);
-  fbuf = fname;
-  (void)modify_fname(":p", false, &usedlen, &fname, &fbuf, &len);
-  if (fname == NULL) {
-    goto add_err;
-  }
-  fname = xstrnsave(fname, len);
-  xfree(fbuf);
-  FileInfo file_info;
-  bool file_info_ok  = os_fileinfo(fname, &file_info);
-  if (!file_info_ok) {
-staterr:
-    if (p_csverbose) {
-      cs_stat_emsg(fname);
-    }
-    goto add_err;
-  }
-
-  // get the prepend path (arg2), expand it, and see if it exists
-  if (arg2 != NULL) {
-    ppath = xmalloc(MAXPATHL + 1);
-    expand_env((char_u *)arg2, (char_u *)ppath, MAXPATHL);
-    if (!os_path_exists((char_u *)ppath)) {
-      goto staterr;
-    }
-  }
-
-  int i;
-  // if filename is a directory, append the cscope database name to it
-  if (S_ISDIR(file_info.stat.st_mode)) {
-    fname2 = (char *)xmalloc(strlen(CSCOPE_DBFILE) + strlen(fname) + 2);
-
-    while (fname[strlen(fname) - 1] == '/'
-           ) {
-      fname[strlen(fname) - 1] = '\0';
-      if (fname[0] == '\0') {
-        break;
-      }
-    }
-    if (fname[0] == '\0') {
-      (void)sprintf(fname2, "/%s", CSCOPE_DBFILE);
-    } else {
-      (void)sprintf(fname2, "%s/%s", fname, CSCOPE_DBFILE);
-    }
-
-    file_info_ok = os_fileinfo(fname2, &file_info);
-    if (!file_info_ok) {
-      if (p_csverbose) {
-        cs_stat_emsg(fname2);
-      }
-      goto add_err;
-    }
-
-    i = cs_insert_filelist(fname2, ppath, flags, &file_info);
-  } else if (S_ISREG(file_info.stat.st_mode) || S_ISLNK(file_info.stat.st_mode)) {
-    i = cs_insert_filelist(fname, ppath, flags, &file_info);
-  } else {
-    if (p_csverbose) {
-      (void)semsg(_("E564: %s is not a directory or a valid cscope database"),
-                  fname);
-    }
-    goto add_err;
-  }
-
-  if (i != -1) {
-    assert(i >= 0);
-    if (cs_create_connection((size_t)i) == CSCOPE_FAILURE
-        || cs_read_prompt((size_t)i) == CSCOPE_FAILURE) {
-      cs_release_csp((size_t)i, true);
-      goto add_err;
-    }
-
-    if (p_csverbose) {
-      msg_clr_eos();
-      (void)smsg_attr(HL_ATTR(HLF_R),
-                      _("Added cscope database %s"),
-                      csinfo[i].fname);
-    }
-  }
-
-  xfree(fname);
-  xfree(fname2);
-  xfree(ppath);
-  return CSCOPE_SUCCESS;
-
-add_err:
-  xfree(fname2);
-  xfree(fname);
-  xfree(ppath);
-  return CSCOPE_FAILURE;
-}
-
-static bool cs_check_for_connections(void)
-{
-  return cs_cnt_connections() > 0;
-}
-
-static int cs_check_for_tags(void)
-{
-  return p_tags[0] != NUL && curbuf->b_p_tags != NULL;
-}
-
-/// Count the number of cscope connections.
-static size_t cs_cnt_connections(void)
-{
-  size_t cnt = 0;
-
-  for (size_t i = 0; i < csinfo_size; i++) {
-    if (csinfo[i].fname != NULL) {
-      cnt++;
-    }
-  }
-  return cnt;
-}
-
-/// @param idx  connection index
-static void cs_reading_emsg(size_t idx)
-{
-  semsg(_("E262: error reading cscope connection %" PRIu64), (uint64_t)idx);
-}
-
-#define CSREAD_BUFSIZE  2048
-/// Count the number of matches for a given cscope connection.
-static int cs_cnt_matches(size_t idx)
-{
-  char *stok;
-  int nlines = 0;
-
-  char *buf = xmalloc(CSREAD_BUFSIZE);
-  for (;;) {
-    errno = 0;
-    if (!fgets(buf, CSREAD_BUFSIZE, csinfo[idx].fr_fp)) {
-      if (errno == EINTR) {
-        continue;
-      }
-
-      if (feof(csinfo[idx].fr_fp)) {
-        errno = EIO;
-      }
-
-      cs_reading_emsg(idx);
-
-      xfree(buf);
-      return CSCOPE_FAILURE;
-    }
-
-    // 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.
-    // Accept "\S*cscope: X lines", also matches "mlcscope".
-    // Bail out for the "Unable to search" error.
-    if (strstr((const char *)buf, "Unable to search database") != NULL) {
-      break;
-    }
-    if ((stok = strtok(buf, (const char *)" ")) == NULL) {
-      continue;
-    }
-    if (strstr((const char *)stok, "cscope:") == NULL) {
-      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(stok, "lines", 5)) {
-      continue;
-    }
-
-    break;
-  }
-
-  xfree(buf);
-  return nlines;
-}
-
-/// Creates the actual cscope command query from what the user entered.
-static char *cs_create_cmd(char *csoption, char *pattern)
-{
-  char *cmd;
-  short search;
-  char *pat;
-
-  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;
-  case '9':
-  case 'a':
-    search = 9;
-    break;
-  default:
-    (void)emsg(_("E561: unknown cscope search type"));
-    cs_usage_msg(Find);
-    return NULL;
-  }
-
-  // Skip white space before the patter, except for text and pattern search,
-  // they may want to use the leading white space.
-  pat = pattern;
-  if (search != 4 && search != 6) {
-    while (ascii_iswhite(*pat)) {
-      pat++;
-    }
-  }
-
-  cmd = xmalloc(strlen(pat) + 2);
-
-  (void)sprintf(cmd, "%d%s", search, pat);
-
-  return cmd;
-}
-
-/// This piece of code was taken/adapted from nvi.  do we need to add
-/// the BSD license notice?
-static int cs_create_connection(size_t i)
-{
-#ifdef UNIX
-  int to_cs[2], from_cs[2];
-#endif
-  char *prog, *cmd, *ppath = NULL;
-
-#if defined(UNIX)
-  /*
-   * 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;
-  }
-
-  switch (csinfo[i].pid = fork()) {
-  case -1:
-    (void)emsg(_("E622: Could not fork for cscope"));
-    goto err_closing;
-  case 0:                               // child: run cscope.
-    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
-    (void)close(to_cs[1]);
-    (void)close(from_cs[0]);
-#else
-  // Create pipes to communicate with cscope
-  int fd;
-  SECURITY_ATTRIBUTES sa;
-  PROCESS_INFORMATION pi;
-  BOOL pipe_stdin = FALSE, pipe_stdout = FALSE;  // NOLINT(readability/bool)
-  STARTUPINFO si;
-  HANDLE stdin_rd, stdout_rd;
-  HANDLE stdout_wr, stdin_wr;
-  BOOL created;
-
-  sa.nLength = sizeof(SECURITY_ATTRIBUTES);
-  sa.bInheritHandle = TRUE;
-  sa.lpSecurityDescriptor = NULL;
-
-  if (!(pipe_stdin = CreatePipe(&stdin_rd, &stdin_wr, &sa, 0))
-      || !(pipe_stdout = CreatePipe(&stdout_rd, &stdout_wr, &sa, 0))) {
-    (void)emsg(_("E566: Could not create cscope pipes"));
-err_closing:
-    if (pipe_stdin) {
-      CloseHandle(stdin_rd);
-      CloseHandle(stdin_wr);
-    }
-    if (pipe_stdout) {
-      CloseHandle(stdout_rd);
-      CloseHandle(stdout_wr);
-    }
-    return CSCOPE_FAILURE;
-  }
-#endif
-    // expand the cscope exec for env var's
-    prog = xmalloc(MAXPATHL + 1);
-    expand_env(p_csprg, (char_u *)prog, MAXPATHL);
-
-    // alloc space to hold the cscope command
-    size_t len = strlen(prog) + strlen(csinfo[i].fname) + 32;
-    if (csinfo[i].ppath) {
-      // expand the prepend path for env var's
-      ppath = xmalloc(MAXPATHL + 1);
-      expand_env((char_u *)csinfo[i].ppath, (char_u *)ppath, MAXPATHL);
-
-      len += strlen(ppath);
-    }
-
-    if (csinfo[i].flags) {
-      len += strlen(csinfo[i].flags);
-    }
-
-    cmd = xmalloc(len);
-
-    // run the cscope command; is there execl for non-unix systems?
-#if defined(UNIX)
-    (void)snprintf(cmd, len, "exec %s -dl -f %s", prog, csinfo[i].fname);
-#else
-    // WIN32
-    (void)snprintf(cmd, len, "%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
-    xfree(prog);
-#endif
-    xfree(ppath);
-
-#if defined(UNIX)
-# if defined(HAVE_SETSID) || defined(HAVE_SETPGID)
-    // Change our process group to avoid cscope receiving SIGWINCH.
-#  if defined(HAVE_SETSID)
-    (void)setsid();
-#  else
-    if (setpgid(0, 0) == -1) {
-      PERROR(_("cs_create_connection setpgid failed"));
-    }
-#  endif
-# endif
-    if (execl("/bin/sh", "sh", "-c", cmd, (char *)NULL) == -1) {
-      PERROR(_("cs_create_connection exec failed"));
-    }
-
-    exit(127);
-  // NOTREACHED
-  default:      // parent.
-    // 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"));
-    }
-
-    // close unused
-    (void)close(to_cs[0]);
-    (void)close(from_cs[1]);
-
-    break;
-  }
-
-#else
-    // WIN32
-    // Create a new process to run cscope and use pipes to talk with it
-    GetStartupInfo(&si);
-    si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
-    si.wShowWindow = SW_HIDE;  // Hide child application window
-    si.hStdOutput = stdout_wr;
-    si.hStdError  = stdout_wr;
-    si.hStdInput  = stdin_rd;
-    created = CreateProcess(NULL, cmd, NULL, NULL, TRUE, CREATE_NEW_CONSOLE,
-                            NULL, NULL, &si, &pi);
-    xfree(prog);
-    xfree(cmd);
-
-    if (!created) {
-      PERROR(_("cs_create_connection exec failed"));
-      (void)emsg(_("E623: Could not spawn cscope process"));
-      goto err_closing;
-    }
-    // else
-    csinfo[i].pid = pi.dwProcessId;
-    csinfo[i].hProc = pi.hProcess;
-    CloseHandle(pi.hThread);
-
-    // TODO(neovim): tidy up after failure to create files on pipe handles.
-    if (((fd = _open_osfhandle((intptr_t)stdin_wr, _O_TEXT|_O_APPEND)) < 0)
-        || ((csinfo[i].to_fp = _fdopen(fd, "w")) == NULL)) {
-      PERROR(_("cs_create_connection: fdopen for to_fp failed"));
-    }
-    if (((fd = _open_osfhandle((intptr_t)stdout_rd,  _O_TEXT|_O_RDONLY)) < 0)
-        || ((csinfo[i].fr_fp = _fdopen(fd, "r")) == NULL)) {
-      PERROR(_("cs_create_connection: fdopen for fr_fp failed"));
-    }
-    // Close handles for file descriptors inherited by the cscope process.
-    CloseHandle(stdin_rd);
-    CloseHandle(stdout_wr);
-
-#endif  // !UNIX
-
-  return CSCOPE_SUCCESS;
-}
-
-/// 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.
-///
-/// @return TRUE if we jump to a tag or abort, FALSE if not.
-static int cs_find(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 >= eap->arg + eap_arg_len) {
-    cs_usage_msg(Find);
-    return false;
-  }
-
-  /*
-   * Let's replace the NULs written by strtok() with spaces - we need the
-   * spaces to correctly display the quickfix/location list window's title.
-   */
-  for (int i = 0; i < eap_arg_len; ++i) {
-    if (NUL == eap->arg[i]) {
-      eap->arg[i] = ' ';
-    }
-  }
-
-  return cs_find_common(opt, pat, eap->forceit, true,
-                        eap->cmdidx == CMD_lcscope, (char_u *)(*eap->cmdlinep));
-}
-
-/// Common code for cscope find, shared by cs_find() and ex_cstag().
-static bool cs_find_common(char *opt, char *pat, int forceit, int verbose, bool use_ll,
-                           char_u *cmdline)
-{
-  char *cmd;
-  int *nummatches;
-  size_t totmatches;
-  char cmdletter;
-  char *qfpos;
-
-  // 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;
-  case '9':
-    cmdletter = 'a';
-    break;
-  default:
-    cmdletter = opt[0];
-  }
-
-  qfpos = vim_strchr((char *)p_csqf, cmdletter);
-  if (qfpos != NULL) {
-    qfpos++;
-    // next symbol must be + or -
-    if (strchr(CSQF_FLAGS, *qfpos) == NULL) {
-      (void)semsg(_("E469: invalid cscopequickfix flag %c for %c"), *qfpos, *(qfpos - 1));
-      return false;
-    }
-
-    if (*qfpos != '0'
-        && apply_autocmds(EVENT_QUICKFIXCMDPRE, "cscope", curbuf->b_fname, true, curbuf)) {
-      if (aborting()) {
-        return false;
-      }
-    }
-  }
-
-  // create the actual command to send to cscope
-  cmd = cs_create_cmd(opt, pat);
-  if (cmd == NULL) {
-    return false;
-  }
-
-  nummatches = xmalloc(sizeof(int) * csinfo_size);
-
-  // Send query to all open connections, then count the total number
-  // of matches so we can alloc all in one swell foop.
-  for (size_t i = 0; i < csinfo_size; i++) {
-    nummatches[i] = 0;
-  }
-  totmatches = 0;
-  for (size_t i = 0; i < csinfo_size; i++) {
-    if (csinfo[i].fname == NULL || csinfo[i].to_fp == 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 += (size_t)nummatches[i];
-    }
-
-    if (nummatches[i] == 0) {
-      (void)cs_read_prompt(i);
-    }
-  }
-  xfree(cmd);
-
-  if (totmatches == 0) {
-    if (verbose) {
-      (void)semsg(_("E259: no matches found for cscope query %s of %s"), opt, pat);
-    }
-    xfree(nummatches);
-    return false;
-  }
-
-  if (qfpos != NULL && *qfpos != '0') {
-    // Fill error list.
-    FILE *f;
-    char_u *tmp = vim_tempname();
-    qf_info_T *qi = NULL;
-    win_T *wp = NULL;
-
-    f = os_fopen((char *)tmp, "w");
-    if (f == NULL) {
-      semsg(_(e_notopen), tmp);
-    } else {
-      cs_file_results(f, nummatches);
-      fclose(f);
-      if (use_ll) {         // Use location list
-        wp = curwin;
-      }
-      // '-' starts a new error list
-      if (qf_init(wp, (char *)tmp, "%f%*\\t%l%*\\t%m",
-                  *qfpos == '-', (char *)cmdline, NULL) > 0) {
-        if (postponed_split != 0) {
-          (void)win_split(postponed_split > 0 ? postponed_split : 0,
-                          postponed_split_flags);
-          RESET_BINDING(curwin);
-          postponed_split = 0;
-        }
-
-        apply_autocmds(EVENT_QUICKFIXCMDPOST, "cscope", curbuf->b_fname, true, curbuf);
-        if (use_ll) {
-          /*
-           * In the location list window, use the displayed location
-           * list. Otherwise, use the location list for the window.
-           */
-          qi = (bt_quickfix(wp->w_buffer) && wp->w_llist_ref != NULL)
-               ?  wp->w_llist_ref : wp->w_llist;
-        }
-        qf_jump(qi, 0, 0, forceit);
-      }
-    }
-    os_remove((char *)tmp);
-    xfree(tmp);
-    xfree(nummatches);
-    return true;
-  } else {
-    char **matches = NULL, **contexts = NULL;
-    size_t matched = 0;
-
-    // read output
-    cs_fill_results(pat, totmatches, nummatches, &matches, &contexts, &matched);
-    xfree(nummatches);
-    if (matches == NULL) {
-      return false;
-    }
-
-    (void)cs_manage_matches(matches, contexts, matched, Store);
-
-    return do_tag((char_u *)pat, DT_CSCOPE, 0, forceit, verbose);
-  }
-}
-
-/// Print help.
-static int cs_help(exarg_T *eap)
-{
-  cscmd_T *cmdp = cs_cmds;
-
-  (void)msg_puts(_("cscope commands:\n"));
-  while (cmdp->name != NULL) {
-    char *help = _(cmdp->help);
-    int space_cnt = 30 - vim_strsize(help);
-
-    // Use %*s rather than %30s to ensure proper alignment in utf-8
-    if (space_cnt < 0) {
-      space_cnt = 0;
-    }
-    (void)smsg(_("%-5s: %s%*s (Usage: %s)"),
-               cmdp->name,
-               help, space_cnt, " ",
-               cmdp->usage);
-    if (strcmp(cmdp->name, "find") == 0) {
-      msg_puts(_("\n"
-                 "       a: Find assignments to this symbol\n"
-                 "       c: Find functions calling this function\n"
-                 "       d: Find functions called by this function\n"
-                 "       e: Find this egrep pattern\n"
-                 "       f: Find this file\n"
-                 "       g: Find this definition\n"
-                 "       i: Find files #including this file\n"
-                 "       s: Find this C symbol\n"
-                 "       t: Find this text string\n"));
-    }
-
-    cmdp++;
-  }
-
-  wait_return(TRUE);
-  return CSCOPE_SUCCESS;
-}
-
-static void clear_csinfo(size_t i)
-{
-  csinfo[i].fname  = NULL;
-  csinfo[i].ppath  = NULL;
-  csinfo[i].flags  = NULL;
-  csinfo[i].file_id = FILE_ID_EMPTY;
-  csinfo[i].pid    = 0;
-  csinfo[i].fr_fp  = NULL;
-  csinfo[i].to_fp  = NULL;
-}
-
-/// Insert a new cscope database filename into the filelist.
-static int cs_insert_filelist(char *fname, char *ppath, char *flags, FileInfo *file_info)
-{
-  size_t i = 0;
-  bool empty_found = false;
-
-  for (size_t j = 0; j < csinfo_size; j++) {
-    if (csinfo[j].fname != NULL
-        && os_fileid_equal_fileinfo(&(csinfo[j].file_id), file_info)) {
-      if (p_csverbose) {
-        (void)emsg(_("E568: duplicate cscope database not added"));
-      }
-      return CSCOPE_FAILURE;
-    }
-
-    if (csinfo[j].fname == NULL && !empty_found) {
-      i = j;       // remember first empty entry
-      empty_found = true;
-    }
-  }
-
-  if (!empty_found) {
-    i = csinfo_size;
-    if (csinfo_size == 0) {
-      // First time allocation: allocate only 1 connection. It should
-      // be enough for most users.  If more is needed, csinfo will be
-      // reallocated.
-      csinfo_size = 1;
-      csinfo = xcalloc(1, sizeof(csinfo_T));
-    } else {
-      // Reallocate space for more connections.
-      csinfo_size *= 2;
-      csinfo = xrealloc(csinfo, sizeof(csinfo_T)*csinfo_size);