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neovim/src/nvim/if_cscope.c
Stefan Hoffmann 10813ce38c fileid: rename os_file_id_equal_file_info
2014-08-31 15:47:43 +02:00

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/*
* 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.
*
* See README.txt for an overview of the Vim source code.
*/
#include <stdbool.h>
#include <assert.h>
#include <errno.h>
#include <inttypes.h>
#include "nvim/vim.h"
#include "nvim/ascii.h"
#include "nvim/if_cscope.h"
#include "nvim/charset.h"
#include "nvim/eval.h"
#include "nvim/fileio.h"
#include "nvim/message.h"
#include "nvim/misc1.h"
#include "nvim/misc2.h"
#include "nvim/memory.h"
#include "nvim/os/time.h"
#include "nvim/path.h"
#include "nvim/quickfix.h"
#include "nvim/strings.h"
#include "nvim/tag.h"
#include "nvim/tempfile.h"
#include "nvim/ui.h"
#include "nvim/window.h"
#include "nvim/os/os.h"
#include <sys/types.h>
#include <sys/stat.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 int 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 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)EMSG2(_("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_u *get_cscope_name(expand_T *xp, int idx)
{
int current_idx;
int i;
switch (expand_what) {
case EXP_CSCOPE_SUBCMD:
/* Complete with sub-commands of ":cscope":
* add, find, help, kill, reset, show */
return (char_u *)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 */
for (i = 0, current_idx = 0; cs_cmds[i].name != NULL; i++)
if (cs_cmds[i].cansplit)
if (current_idx++ == idx)
break;
return (char_u *)cs_cmds[i].name;
case EXP_CSCOPE_FIND:
{
const char *query_type[] =
{
"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, ... t) or numbers (0, 1,
* ..., 8) but only complete with letters, since numbers are
* redundant. */
return (char_u *)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. */
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), "%d", i);
return (char_u *)connection;
}
}
return (current_idx == idx && idx > 0) ? (char_u *)"-1" : NULL;
}
default:
return NULL;
}
}
/*
* Handle command line completion for :cscope command.
*/
void set_context_in_cscope_cmd(expand_T *xp, char_u *arg, cmdidx_T cmdidx)
{
char_u *p;
/* Default: expand subcommands */
xp->xp_context = EXPAND_CSCOPE;
xp->xp_pattern = arg;
expand_what = (cmdidx == CMD_scscope)
? EXP_SCSCOPE_SUBCMD : EXP_CSCOPE_SUBCMD;
/* (part of) subcommand already typed */
if (*arg != NUL) {
p = skiptowhite(arg);
if (*p != NUL) { /* past first word */
xp->xp_pattern = skipwhite(p);
if (*skiptowhite(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;
}
}
}
/*
* PRIVATE: do_cscope_general
*
* Find the command, print help if invalid, and then call the corresponding
* command function.
*/
static void
do_cscope_general (
exarg_T *eap,
int make_split /* whether to split window */
)
{
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.split;
postponed_split_tab = cmdmod.tab;
}
cmdp->func(eap);
postponed_split_flags = 0;
postponed_split_tab = 0;
}
/*
* PUBLIC: do_cscope
*/
void do_cscope(exarg_T *eap)
{
do_cscope_general(eap, FALSE);
}
/*
* PUBLIC: do_scscope
*
* same as do_cscope, but splits window, too.
*/
void do_scscope(exarg_T *eap)
{
do_cscope_general(eap, TRUE);
}
/*
* PUBLIC: do_cstag
*
*/
void do_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", (char *)(eap->arg), eap->forceit, FALSE,
FALSE, *eap->cmdlinep);
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, FALSE, *eap->cmdlinep);
if (ret == FALSE)
cs_free_tags();
}
}
} else if (cs_check_for_connections()) {
ret = cs_find_common("g", (char *)(eap->arg), eap->forceit, FALSE,
FALSE, *eap->cmdlinep);
if (ret == FALSE)
cs_free_tags();
}
break;
default:
break;
}
if (!ret) {
(void)EMSG(_("E257: cstag: tag not found"));
g_do_tagpreview = 0;
}
} /* 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(char_u *buf, int size)
{
char *p;
if ((p = cs_manage_matches(NULL, NULL, -1, Get)) == NULL)
return TRUE;
STRLCPY(buf, p, size);
return FALSE;
} /* cs_fgets */
/*
* PUBLIC: cs_free_tags
*
* called only from do_tag(), when popping the tag stack
*/
void cs_free_tags(void)
{
cs_manage_matches(NULL, NULL, -1, Free);
}
/*
* PUBLIC: cs_print_tags
*
* called from do_tag()
*/
void cs_print_tags(void)
{
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!
*/
int cs_connection(int num, char_u *dbpath, char_u *ppath)
{
int i;
if (num < 0 || num > 4 || (num > 0 && !dbpath))
return FALSE;
for (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
****************************************************************************/
/*
* PRIVATE: cs_add
*
* add cscope database or a directory name (to look for cscope.out)
* to the cscope connection list
*
* MAXPATHL 256
*/
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)
{
char *stat_emsg = _("E563: stat(%s) error: %d");
char *buf = xmalloc(strlen(stat_emsg) + MAXPATHL + 10);
(void)sprintf(buf, stat_emsg, fname, errno);
(void)EMSG(buf);
free(buf);
}
/*
* 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 (
char *arg1, /* filename - may contain environment variables */
char *arg2, /* prepend path - may contain environment variables */
char *flags
)
{
char *fname = NULL;
char *fname2 = NULL;
char *ppath = NULL;
int i;
int len;
int usedlen = 0;
char_u *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);
len = (int)STRLEN(fname);
fbuf = (char_u *)fname;
(void)modify_fname((char_u *)":p", &usedlen,
(char_u **)&fname, &fbuf, &len);
if (fname == NULL)
goto add_err;
fname = (char *)vim_strnsave((char_u *)fname, len);
free(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_file_exists((char_u *)ppath))
goto staterr;
}
/* if filename is a directory, append the cscope database name to it */
if ((file_info.stat.st_mode & S_IFMT) == S_IFDIR) {
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)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);
}
}
free(fname);
free(fname2);
free(ppath);
return CSCOPE_SUCCESS;
add_err:
free(fname2);
free(fname);
free(ppath);
return CSCOPE_FAILURE;
} /* cs_add_common */
static int cs_check_for_connections(void)
{
return cs_cnt_connections() > 0;
} /* cs_check_for_connections */
static int cs_check_for_tags(void)
{
return p_tags[0] != NUL && curbuf->b_p_tags != NULL;
} /* cs_check_for_tags */
/*
* PRIVATE: cs_cnt_connections
*
* count the number of cscope connections
*/
static int cs_cnt_connections(void)
{
short i;
short cnt = 0;
for (i = 0; i < csinfo_size; i++) {
if (csinfo[i].fname != NULL)
cnt++;
}
return cnt;
} /* cs_cnt_connections */
static void
cs_reading_emsg (
int idx /* connection index */
)
{
EMSGN(_("E262: error reading cscope connection %" PRId64), idx);
}
#define CSREAD_BUFSIZE 2048
/*
* PRIVATE: cs_cnt_matches
*
* count the number of matches for a given cscope connection.
*/
static int cs_cnt_matches(int idx)
{
char *stok;
int nlines;
char *buf = xmalloc(CSREAD_BUFSIZE);
for (;; ) {
if (!fgets(buf, CSREAD_BUFSIZE, csinfo[idx].fr_fp)) {
if (feof(csinfo[idx].fr_fp))
errno = EIO;
cs_reading_emsg(idx);
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.
* Accept "\S*cscope: X lines", also matches "mlcscope".
*/
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((const char *)stok, "lines", 5))
continue;
break;
}
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(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;
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 (vim_iswhite(*pat))
++pat;
cmd = xmalloc(strlen(pat) + 2);
(void)sprintf(cmd, "%d%s", search, pat);
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(int i)
{
#ifdef UNIX
int to_cs[2], from_cs[2];
#endif
int len;
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
/* WIN32 */
/* Create pipes to communicate with cscope */
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((char_u *)p_csprg, (char_u *)prog, MAXPATHL);
/* alloc space to hold the cscope command */
len = (int)(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 += (int)strlen(ppath);
}
if (csinfo[i].flags)
len += (int)strlen(csinfo[i].flags);
cmd = xmalloc(len);
/* 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
/* WIN32 */
(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 */
free(prog);
# endif
free(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);
free(prog);
free(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 - tidy up after failure to create files on pipe handles. */
if (((fd = _open_osfhandle((OPEN_OH_ARGTYPE)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((OPEN_OH_ARGTYPE)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;
} /* 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(exarg_T *eap)
{
char *opt, *pat;
int i;
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 >= (char *)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 (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, *eap->cmdlinep);
} /* cs_find */
/*
* PRIVATE: cs_find_common
*
* common code for cscope find, shared by cs_find() and do_cstag()
*/
static int cs_find_common(char *opt, char *pat, int forceit, int verbose, int use_ll, char_u *cmdline)
{
int i;
char *cmd;
int *nummatches;
int 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;
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");
/* strlen will be enough because we use chars */
char *buf = xmalloc(strlen(nf));
sprintf(buf, nf, *qfpos, *(qfpos-1));
(void)EMSG(buf);
free(buf);
return FALSE;
}
if (*qfpos != '0') {
apply_autocmds(EVENT_QUICKFIXCMDPRE, (char_u *)"cscope",
curbuf->b_fname, TRUE, curbuf);
if (did_throw || force_abort)
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 (i = 0; i < csinfo_size; i++)
nummatches[i] = 0;
totmatches = 0;
for (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 += nummatches[i];
if (nummatches[i] == 0)
(void)cs_read_prompt(i);
}
free(cmd);
if (totmatches == 0) {
char *nf = _("E259: no matches found for cscope query %s of %s");
char *buf;
if (!verbose) {
free(nummatches);
return FALSE;
}
buf = xmalloc(strlen(opt) + strlen(pat) + strlen(nf));
sprintf(buf, nf, opt, pat);
(void)EMSG(buf);
free(buf);
free(nummatches);
return FALSE;
}
if (qfpos != NULL && *qfpos != '0' && totmatches > 0) {
/* fill error list */
FILE *f;
char_u *tmp = vim_tempname();
qf_info_T *qi = NULL;
win_T *wp = NULL;
f = mch_fopen((char *)tmp, "w");
if (f == NULL)
EMSG2(_(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, tmp, (char_u *)"%f%*\\t%l%*\\t%m",
*qfpos == '-', cmdline) > 0) {
if (postponed_split != 0) {
win_split(postponed_split > 0 ? postponed_split : 0,
postponed_split_flags);
RESET_BINDING(curwin);
postponed_split = 0;
}
apply_autocmds(EVENT_QUICKFIXCMDPOST, (char_u *)"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);
free(tmp);
free(nummatches);
return TRUE;
} else {
char **matches = NULL, **contexts = NULL;
int matched = 0;
/* read output */
cs_fill_results((char *)pat, totmatches, nummatches, &matches,
&contexts, &matched);
free(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);
}
} /* cs_find_common */
/*
* PRIVATE: cs_help
*
* 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((char_u *)help);
/* Use %*s rather than %30s to ensure proper alignment in utf-8 */
if (space_cnt < 0)
space_cnt = 0;
(void)smsg((char_u *)_("%-5s: %s%*s (Usage: %s)"),
cmdp->name,
help, space_cnt, " ",
cmdp->usage);
if (strcmp(cmdp->name, "find") == 0)
MSG_PUTS(_("\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 0;
} /* cs_help */
static void clear_csinfo(int 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;
}
#ifndef UNIX
static char *GetWin32Error(void)
{
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(char *fname, char *ppath, char *flags,
FileInfo *file_info)
{
short i, j;
i = -1; /* can be set to the index of an empty item in csinfo */
for (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 -1;
}
if (csinfo[j].fname == NULL && i == -1)
i = j; /* remember first empty entry */
}
if (i == -1) {
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);
}
for (j = csinfo_size/2; j < csinfo_size; j++)
clear_csinfo(j);
}
csinfo[i].fname = xmalloc(strlen(fname) + 1);
(void)strcpy(csinfo[i].fname, (const char *)fname);
if (ppath != NULL) {
csinfo[i].ppath = xmalloc(strlen(ppath) + 1);
(void)strcpy(csinfo[i].ppath, (const char *)ppath);
} else
csinfo[i].ppath = NULL;
if (flags != NULL) {
csinfo[i].flags = xmalloc(strlen(flags) + 1);
(void)strcpy(csinfo[i].flags, (const char *)flags);
} else
csinfo[i].flags = NULL;
os_fileinfo_id(file_info, &(csinfo[i].file_id));
return i;
} /* cs_insert_filelist */
/*
* PRIVATE: cs_lookup_cmd
*
* find cscope command in command table
*/
static cscmd_T * cs_lookup_cmd(exarg_T *eap)
{
cscmd_T *cmdp;
char *stok;
size_t len;
if (eap->arg == NULL)
return NULL;
/* Store length of eap->arg before it gets modified by strtok(). */
eap_arg_len = (int)STRLEN(eap->arg);
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
*/
static int cs_kill(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 < csinfo_size; i++) {
if (csinfo[i].fname != NULL && strstr(csinfo[i].fname, stok))
break;
}
}
if ((i != -1) && (i >= csinfo_size || i < -1 || csinfo[i].fname == NULL)) {
if (p_csverbose)
(void)EMSG2(_("E261: cscope connection %s not found"), stok);
} else {
if (i == -1) {
for (i = 0; i < csinfo_size; 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 (
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 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(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;
size_t amt;
if (search != NULL) {
amt = strlen(fname) + strlen(slno) + strlen(tagstr) + strlen(search) + 6;
buf = xmalloc(amt);
(void)sprintf(buf, "%s\t%s\t%s;\"\t%s", tagstr, fname, slno, search);
} else {
amt = strlen(fname) + strlen(slno) + strlen(tagstr) + 5;
buf = xmalloc(amt);
(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(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--) {
free(mp[cnt]);
if (cp != NULL)
free(cp[cnt]);
}
free(mp);
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(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(FILE *f, int *nummatches_a)
{
int i, j;
char *search, *slno;
char *fullname;
char *cntx;
char *context;
char *buf = xmalloc(CSREAD_BUFSIZE);
for (i = 0; i < csinfo_size; 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 = xmalloc(strlen(cntx) + 5);
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);
free(context);
free(fullname);
} /* for all matches */
(void)cs_read_prompt(i);
} /* for all cscope connections */
free(buf);
}
/*
* PRIVATE: cs_fill_results
*
* get parsed cscope output and calls cs_make_vim_style_matches to convert
* into ctags format
* When there are no matches sets "*matches_p" to NULL.
*/
static void cs_fill_results(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 = xmalloc(CSREAD_BUFSIZE);
matches = xmalloc(sizeof(char *) * totmatches);
cntxts = xmalloc(sizeof(char *) * totmatches);
for (i = 0; i < csinfo_size; 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);
free(fullname);
if (strcmp(cntx, "<global>") == 0)
cntxts[totsofar] = NULL;
else {
cntxts[totsofar] = xstrdup(cntx);
}
totsofar++;
} /* for all matches */
(void)cs_read_prompt(i);
} /* for all cscope connections */
if (totsofar == 0) {
/* No matches, free the arrays and return NULL in "*matches_p". */
free(matches);
matches = NULL;
free(cntxts);
cntxts = NULL;
}
*matched = totsofar;
*matches_p = matches;
*cntxts_p = cntxts;
free(buf);
} /* cs_fill_results */
/* get the requested path components */
static char *cs_pathcomponents(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 != '/'
)
;
if ((s > path && *s == '/')
)
++s;
return s;
}
/*
* PRIVATE: cs_print_tags_priv
*
* called from cs_manage_matches()
*/
static void cs_print_tags_priv(char **matches, char **cntxts, int num_matches)
{
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);
tbuf = xmalloc(strlen(matches[0]) + 1);
strcpy(tbuf, matches[0]);
ptag = strtok(tbuf, "\t");
size_t newsize = strlen(cstag_msg) + strlen(ptag);
char *buf = xmalloc(newsize);
size_t bufsize = newsize; // Track available bufsize
(void)sprintf(buf, cstag_msg, ptag);
MSG_PUTS_ATTR(buf, hl_attr(HLF_T));
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
*/
tbuf = xmalloc(strlen(matches[idx]) + 1);
(void)strcpy(tbuf, matches[idx]);
if (strtok(tbuf, (const char *)"\t") == NULL)
continue;
if ((fname = strtok(NULL, (const char *)"\t")) == NULL)
continue;
if ((lno = strtok(NULL, (const char *)"\t")) == NULL)
continue;
extra = strtok(NULL, (const char *)"\t");
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 = xrealloc(buf, newsize);
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 = xrealloc(buf, newsize);
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);
}
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 */
free(buf);
} /* cs_print_tags_priv */
/*
* PRIVATE: cs_read_prompt
*
* read a cscope prompt (basically, skip over the ">> ")
*/
static int cs_read_prompt(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 = (int)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)) {
// lazy buffer allocation
if (buf == NULL) {
buf = xmalloc(maxlen);
}
{
/* 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);
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 */
}
free(buf);
return CSCOPE_SUCCESS;
}
#if defined(UNIX) && defined(SIGALRM)
/*
* Used to catch and ignore SIGALRM below.
*/
static RETSIGTYPE
sig_handler SIGDEFARG(sigarg) {
/* do nothing */
SIGRETURN;
}
#endif
/*
* 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(int i, int freefnpp)
{
/*
* 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);
}
#if defined(UNIX)
{
int waitpid_errno;
int pstat;
pid_t pid;
# if defined(HAVE_SIGACTION)
struct sigaction sa, old;
/* Use sigaction() to limit the waiting time to two seconds. */
sigemptyset(&sa.sa_mask);
sa.sa_handler = sig_handler;
# ifdef SA_NODEFER
sa.sa_flags = SA_NODEFER;
# else
sa.sa_flags = 0;
# endif
sigaction(SIGALRM, &sa, &old);
alarm(2); /* 2 sec timeout */
/* Block until cscope exits or until timer expires */
pid = waitpid(csinfo[i].pid, &pstat, 0);
waitpid_errno = errno;
/* cancel pending alarm if still there and restore signal */
alarm(0);
sigaction(SIGALRM, &old, NULL);
# else
int waited;
/* Can't use sigaction(), loop for two seconds. First yield the CPU
* to give cscope a chance to exit quickly. */
sleep(0);
for (waited = 0; waited < 40; ++waited) {
pid = waitpid(csinfo[i].pid, &pstat, WNOHANG);
waitpid_errno = errno;
if (pid != 0)
break; /* break unless the process is still running */
os_delay(50L, false); /* sleep 50 ms */
}
# endif
/*
* If the cscope process is still running: kill it.
* Safety check: If the PID would be zero here, the entire X session
* would be killed. -1 and 1 are dangerous as well.
*/
if (pid < 0 && csinfo[i].pid > 1) {
# ifdef ECHILD
int alive = TRUE;
if (waitpid_errno == ECHILD) {
/*
* When using 'vim -g', vim is forked and cscope process is
* no longer a child process but a sibling. So waitpid()
* fails with errno being ECHILD (No child processes).
* Don't send SIGKILL to cscope immediately but wait
* (polling) for it to exit normally as result of sending
* the "q" command, hence giving it a chance to clean up
* its temporary files.
*/
int waited;
sleep(0);
for (waited = 0; waited < 40; ++waited) {
/* Check whether cscope process is still alive */
if (kill(csinfo[i].pid, 0) != 0) {
alive = FALSE; /* cscope process no longer exists */
break;
}
os_delay(50L, false); /* sleep 50ms */
}
}
if (alive)
# endif
{
kill(csinfo[i].pid, SIGKILL);
(void)waitpid(csinfo[i].pid, &pstat, 0);
}
}
}
#else /* !UNIX */
if (csinfo[i].hProc != NULL) {
/* Give cscope a chance to exit normally */
if (WaitForSingleObject(csinfo[i].hProc, 1000) == WAIT_TIMEOUT)
TerminateProcess(csinfo[i].hProc, 0);
CloseHandle(csinfo[i].hProc);
}
#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);
if (freefnpp) {
free(csinfo[i].fname);
free(csinfo[i].ppath);
free(csinfo[i].flags);
}
clear_csinfo(i);
} /* cs_release_csp */
/*
* PRIVATE: cs_reset
*
* calls cs_kill on all cscope connections then reinits
*/
static int cs_reset(exarg_T *eap)
{
char **dblist = NULL, **pplist = NULL, **fllist = NULL;
int i;
char buf[20]; /* for sprintf " (#%d)" */
if (csinfo_size == 0)
return CSCOPE_SUCCESS;
/* malloc our db and ppath list */
dblist = xmalloc(csinfo_size * sizeof(char *));
pplist = xmalloc(csinfo_size * sizeof(char *));
fllist = xmalloc(csinfo_size * sizeof(char *));
for (i = 0; i < csinfo_size; 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 < csinfo_size; i++) {
if (dblist[i] != NULL) {
cs_add_common(dblist[i], pplist[i], fllist[i]);
if (p_csverbose) {
/* don't use smsg_attr() because we want to display the
* connection number in the same line as
* "Added cscope database..."
*/
sprintf(buf, " (#%d)", i);
MSG_PUTS_ATTR(buf, hl_attr(HLF_R));
}
}
free(dblist[i]);
free(pplist[i]);
free(fllist[i]);
}
free(dblist);
free(pplist);
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(int i, char *name)
{
char *fullname;
char_u *csdir = NULL;
/*
* 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.
*/
size_t len = strlen(name) + 2;
if (csinfo[i].ppath != NULL)
len += strlen(csinfo[i].ppath);
else if (p_csre && csinfo[i].fname != NULL) {
/* If 'cscoperelative' is set and ppath is not set, use cscope.out
* path in path resolution. */
csdir = xmalloc(MAXPATHL);
STRLCPY(csdir, csinfo[i].fname,
path_tail((char_u *)csinfo[i].fname)
- (char_u *)csinfo[i].fname + 1);
len += STRLEN(csdir);
}
/* 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] != '/')
) {
fullname = xmalloc(len);
(void)sprintf(fullname, "%s/%s", csinfo[i].ppath, name);
} else if (csdir != NULL && csinfo[i].fname != NULL && *csdir != NUL) {
/* Check for csdir to be non empty to avoid empty path concatenated to
* cscope output. */
fullname = (char *)concat_fnames(csdir, (char_u *)name, TRUE);
} else {
fullname = xstrdup(name);
}
free(csdir);
return fullname;
}
/*
* PRIVATE: cs_show
*
* show all cscope connections
*/
static int cs_show(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 < csinfo_size; 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 */
/*
* PUBLIC: cs_end
*
* Only called when VIM exits to quit any cscope sessions.
*/
void cs_end(void)
{
int i;
for (i = 0; i < csinfo_size; i++)
cs_release_csp(i, TRUE);
free(csinfo);
csinfo_size = 0;
}
/* the end */
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