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vim/src/if_cscope.c
Yegappan Lakshmanan 00d3459ea6
patch 9.1.0959: Coverity complains about type conversion 
Problem:  Coverity complains about type conversion
          (after v9.1.0957)
Solution: use size_t instead of int for file length
          (Yegappan Lakshmanan)

closes: #16297

Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
2024-12-25 10:20:51 +01:00

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/* vi:set ts=8 sts=4 sw=4 noet:
*
* 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 "vim.h"
#if defined(FEAT_CSCOPE) || defined(PROTO)
#include <sys/types.h>
#include <sys/stat.h>
#if defined(UNIX)
# include <sys/wait.h>
#endif
#if defined (MSWIN)
# ifndef WIN32_LEAN_AND_MEAN
# define WIN32_LEAN_AND_MEAN
# endif
# include <windows.h>
#endif
#define CSCOPE_SUCCESS 0
#define CSCOPE_FAILURE -1
#define CSCOPE_DBFILE "cscope.out"
#define CSCOPE_PROMPT ">> "
/*
* See ":help cscope-find" for the possible queries.
*/
typedef struct {
char * name;
int (*func)(exarg_T *eap);
char * help;
char * usage;
int cansplit; // if supports splitting window
} cscmd_T;
typedef struct csi {
char * fname; // cscope db name
char * ppath; // path to prepend (the -P option)
char * flags; // additional cscope flags/options (e.g, -p2)
#if defined(UNIX)
pid_t pid; // PID of the connected cscope process.
dev_t st_dev; // ID of dev containing cscope db
ino_t st_ino; // inode number of cscope db
#else
# if defined(MSWIN)
DWORD pid; // PID of the connected cscope process.
HANDLE hProc; // cscope process handle
DWORD nVolume; // Volume serial number, instead of st_dev
DWORD nIndexHigh; // st_ino has no meaning in the Windows
DWORD nIndexLow;
# endif
#endif
FILE * fr_fp; // from cscope: FILE.
FILE * to_fp; // to cscope: FILE.
} csinfo_T;
typedef enum { Add, Find, Help, Kill, Reset, Show } csid_e;
typedef enum {
Store,
Get,
Free,
Print
} mcmd_e;
static int cs_add(exarg_T *eap);
static int cs_add_common(char *, char *, char *);
static int cs_check_for_connections(void);
static int cs_check_for_tags(void);
static int cs_cnt_connections(void);
static int cs_create_connection(int i);
#ifdef FEAT_QUICKFIX
static void cs_file_results(FILE *, int *);
#endif
static void cs_fill_results(char *, int , int *, char ***,
char ***, int *);
static int cs_find(exarg_T *eap);
static int cs_find_common(char *opt, char *pat, int, int, int, char_u *cmdline);
static int cs_help(exarg_T *eap);
static int cs_insert_filelist(char *, char *, char *,
stat_T *);
static int cs_kill(exarg_T *eap);
static void cs_kill_execute(int, char *);
static cscmd_T * cs_lookup_cmd(exarg_T *eap);
static char * cs_make_vim_style_matches(char *, char *,
char *, char *);
static char * cs_manage_matches(char **, char **, int, mcmd_e);
static void cs_print_tags_priv(char **, char **, int);
static int cs_read_prompt(int);
static void cs_release_csp(int, int freefnpp);
static int cs_reset(exarg_T *eap);
static char * cs_resolve_file(int, char *);
static int cs_show(exarg_T *eap);
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 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(_(e_usage_cscope_str), 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 UNUSED, 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[] =
{
"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_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;
if (*arg == NUL)
return;
// (part of) subcommand already typed
p = skiptowhite(arg);
if (*p == NUL)
return;
// 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;
}
/*
* 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 UNUSED) // 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.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(_(e_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(_(e_cstag_tag_not_founc));
#if defined(FEAT_QUICKFIX)
g_do_tagpreview = 0;
#endif
}
}
/*
* 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;
vim_strncpy(buf, (char_u *)p, size - 1);
return FALSE;
}
/*
* Called only from do_tag(), when popping the tag stack.
*/
void
cs_free_tags(void)
{
cs_manage_matches(NULL, NULL, -1, Free);
}
/*
* 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!
*/
#if defined(FEAT_EVAL) || defined(PROTO)
static 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;
}
#endif
/*
* 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 UNUSED)
{
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(_(e_stat_str_error_nr), 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.
*/
static int
cs_add_common(
char *arg1, // filename - may contain environment variables
char *arg2, // prepend path - may contain environment variables
char *flags)
{
stat_T statbuf;
int ret;
char *fname = NULL;
char *fname2 = NULL;
char *ppath = NULL;
int i;
size_t len;
size_t usedlen = 0;
char_u *fbuf = NULL;
// get the filename (arg1), expand it, and try to stat it
if ((fname = alloc(MAXPATHL + 1)) == NULL)
goto add_err;
expand_env((char_u *)arg1, (char_u *)fname, MAXPATHL);
len = STRLEN(fname);
fbuf = (char_u *)fname;
(void)modify_fname((char_u *)":p", FALSE, &usedlen,
(char_u **)&fname, &fbuf, &len);
if (fname == NULL)
goto add_err;
fname = (char *)vim_strnsave((char_u *)fname, len);
vim_free(fbuf);
ret = mch_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)
{
stat_T statbuf2;
if ((ppath = alloc(MAXPATHL + 1)) == NULL)
goto add_err;
expand_env((char_u *)arg2, (char_u *)ppath, MAXPATHL);
ret = mch_stat(ppath, &statbuf2);
if (ret < 0)
goto staterr;
}
// if filename is a directory, append the cscope database name to it
if (S_ISDIR(statbuf.st_mode))
{
fname2 = alloc(strlen(CSCOPE_DBFILE) + strlen(fname) + 2);
if (fname2 == NULL)
goto add_err;
while (fname[strlen(fname)-1] == '/'
#ifdef MSWIN
|| fname[strlen(fname)-1] == '\\'
#endif
)
{
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);
ret = mch_stat(fname2, &statbuf);
if (ret < 0)
{
if (p_csverbose)
cs_stat_emsg(fname2);
goto add_err;
}
i = cs_insert_filelist(fname2, ppath, flags, &statbuf);
}
else if (S_ISREG(statbuf.st_mode) || S_ISLNK(statbuf.st_mode))
{
i = cs_insert_filelist(fname, ppath, flags, &statbuf);
}
else
{
if (p_csverbose)
(void)semsg(_(e_str_is_not_directory_or_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),
_("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;
}
static int
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 int
cs_cnt_connections(void)
{
int i;
int cnt = 0;
for (i = 0; i < csinfo_size; i++)
if (csinfo[i].fname != NULL)
cnt++;
return cnt;
}
static void
cs_reading_emsg(
int idx) // connection index
{
semsg(_(e_error_reading_cscope_connection_nr), idx);
}
#define CSREAD_BUFSIZE 2048
/*
* Count the number of matches for a given cscope connection.
*/
static int
cs_cnt_matches(int idx)
{
char *stok;
char *buf;
int nlines = 0;
buf = 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.
* 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((const char *)stok, "lines", 5))
continue;
break;
}
vim_free(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(_(e_unknown_cscope_search_type));
cs_usage_msg(Find);
return NULL;
}
// Skip white space before the pattern, 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;
if ((cmd = alloc(strlen(pat) + 2)) == NULL)
return NULL;
(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(int i)
{
#ifdef UNIX
int to_cs[2], from_cs[2];
#endif
int cmdlen;
int len;
char *prog, *cmd, *ppath = NULL;
#ifdef MSWIN
int fd;
SECURITY_ATTRIBUTES sa;
PROCESS_INFORMATION pi;
STARTUPINFO si;
BOOL pipe_stdin = FALSE, pipe_stdout = FALSE;
HANDLE stdin_rd, stdout_rd;
HANDLE stdout_wr, stdin_wr;
BOOL created;
#endif
#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(_(e_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 ((csinfo[i].pid = fork()) == -1)
{
(void)emsg(_(e_could_not_fork_for_cscope));
goto err_closing;
}
else if (csinfo[i].pid == 0) // child: run cscope.
{
char **argv = NULL;
int argc = 0;
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
// MSWIN
// 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(_(e_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
if ((prog = alloc(MAXPATHL + 1)) == NULL)
{
#ifdef UNIX
exit(EXIT_FAILURE);
#else
// MSWIN
goto err_closing;
#endif
}
expand_env(p_csprg, (char_u *)prog, MAXPATHL);
// alloc space to hold the cscope command
cmdlen = (int)(strlen(prog) + strlen(csinfo[i].fname) + 32);
if (csinfo[i].ppath)
{
// expand the prepend path for env var's
if ((ppath = alloc(MAXPATHL + 1)) == NULL)
{
vim_free(prog);
#ifdef UNIX
exit(EXIT_FAILURE);
#else
// MSWIN
goto err_closing;
#endif
}
expand_env((char_u *)csinfo[i].ppath, (char_u *)ppath, MAXPATHL);
cmdlen += (int)strlen(ppath);
}
if (csinfo[i].flags)
cmdlen += (int)strlen(csinfo[i].flags);
if ((cmd = alloc(cmdlen)) == NULL)
{
vim_free(prog);
vim_free(ppath);
#ifdef UNIX
exit(EXIT_FAILURE);
#else
// MSWIN
goto err_closing;
#endif
}
// run the cscope command
#ifdef UNIX
vim_snprintf(cmd, cmdlen, "/bin/sh -c \"exec %s -dl -f %s",
prog, csinfo[i].fname);
#else
vim_snprintf(cmd, cmdlen, "%s -dl -f %s", prog, csinfo[i].fname);
#endif
if (csinfo[i].ppath != NULL)
{
len = (int)STRLEN(cmd);
vim_snprintf(cmd + len, cmdlen - len, " -P%s", csinfo[i].ppath);
}
if (csinfo[i].flags != NULL)
{
len = (int)STRLEN(cmd);
vim_snprintf(cmd + len, cmdlen - len, " %s", csinfo[i].flags);
}
# ifdef UNIX
// terminate the -c command argument
STRCAT(cmd, "\"");
// on Win32 we still need prog
vim_free(prog);
# endif
vim_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 (build_argv_from_string((char_u *)cmd, &argv, &argc) == FAIL)
exit(EXIT_FAILURE);
if (execvp(argv[0], argv) == -1)
PERROR(_("cs_create_connection exec failed"));
exit(127);
// NOTREACHED
}
else // 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]);
}
#else
// MSWIN
// 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);
vim_free(prog);
vim_free(cmd);
if (!created)
{
PERROR(_("cs_create_connection exec failed"));
(void)emsg(_(e_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((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.
*
* 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(_(e_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);
}
/*
* Common code for cscope find, shared by cs_find() and ex_cstag().
*/
static int
cs_find_common(
char *opt,
char *pat,
int forceit,
int verbose,
int use_ll UNUSED,
char_u *cmdline UNUSED)
{
int i;
char *cmd;
int *nummatches;
int totmatches;
#ifdef FEAT_QUICKFIX
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 = (char *)vim_strchr(p_csqf, cmdletter);
if (qfpos != NULL)
{
qfpos++;
// next symbol must be + or -
if (strchr(CSQF_FLAGS, *qfpos) == NULL)
{
(void)semsg(_(e_invalid_cscopequickfix_flag_chr_for_chr),
*qfpos, *(qfpos - 1));
return FALSE;
}
if (*qfpos != '0'
&& apply_autocmds(EVENT_QUICKFIXCMDPRE, (char_u *)"cscope",
curbuf->b_fname, TRUE, curbuf))
{
# ifdef FEAT_EVAL
if (aborting())
return FALSE;
# endif
}
}
#endif
// create the actual command to send to cscope
cmd = cs_create_cmd(opt, pat);
if (cmd == NULL)
return FALSE;
nummatches = ALLOC_MULT(int, csinfo_size);
if (nummatches == NULL)
{
vim_free(cmd);
return FALSE;
}
// 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);
}
vim_free(cmd);
if (totmatches == 0)
{
if (verbose)
(void)semsg(_(e_no_matches_found_for_cscope_query_str_of_str),
opt, pat);
vim_free(nummatches);
return FALSE;
}
#ifdef FEAT_QUICKFIX
if (qfpos != NULL && *qfpos != '0' && totmatches > 0)
{
// fill error list
FILE *f;
char_u *tmp = vim_tempname('c', TRUE);
qf_info_T *qi = NULL;
win_T *wp = NULL;
f = mch_fopen((char *)tmp, "w");
if (f == NULL)
semsg(_(e_cant_open_file_str), 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, 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, (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);
}
}
mch_remove(tmp);
vim_free(tmp);
vim_free(nummatches);
return TRUE;
}
else
#endif // FEAT_QUICKFIX
{
char **matches = NULL, **contexts = NULL;
int matched = 0;
// read output
cs_fill_results(pat, totmatches, nummatches, &matches,
&contexts, &matched);
vim_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);
}
}
/*
* Print help.
*/
static int
cs_help(exarg_T *eap UNUSED)
{
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(_("%-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 0;
}
static void
clear_csinfo(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 = 0;
csinfo[i].fr_fp = NULL;
csinfo[i].to_fp = NULL;
#if defined(MSWIN)
csinfo[i].hProc = NULL;
#endif
}
/*
* Insert a new cscope database filename into the filelist.
*/
static int
cs_insert_filelist(
char *fname,
char *ppath,
char *flags,
stat_T *sb UNUSED)
{
int i;
int j;
#ifndef UNIX
BY_HANDLE_FILE_INFORMATION bhfi;
switch (win32_fileinfo((char_u *)fname, &bhfi))
{
case FILEINFO_ENC_FAIL: // enc_to_utf16() failed
case FILEINFO_READ_FAIL: // CreateFile() failed
if (p_csverbose)
{
char *cant_msg = _(e_cannot_open_cscope_database_str);
char *winmsg = GetWin32Error();
if (winmsg != NULL)
(void)semsg(cant_msg, winmsg);
else
// subst filename if can't get error text
(void)semsg(cant_msg, fname);
}
return -1;
case FILEINFO_INFO_FAIL: // GetFileInformationByHandle() failed
if (p_csverbose)
(void)emsg(_(e_cannot_get_cscope_database_information));
return -1;
}
#endif
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
#if defined(UNIX)
&& csinfo[j].st_dev == sb->st_dev && csinfo[j].st_ino == sb->st_ino
#else
// compare pathnames first
&& ((fullpathcmp((char_u *)csinfo[j].fname,
(char_u *)fname, FALSE, TRUE) & FPC_SAME)
// test index file attributes too
|| (csinfo[j].nVolume == bhfi.dwVolumeSerialNumber
&& csinfo[j].nIndexHigh == bhfi.nFileIndexHigh
&& csinfo[j].nIndexLow == bhfi.nFileIndexLow))
#endif
)
{
if (p_csverbose)
(void)emsg(_(e_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 = ALLOC_CLEAR_ONE(csinfo_T);
}
else
{
csinfo_T *t_csinfo = csinfo;
// Reallocate space for more connections.
csinfo_size *= 2;
csinfo = vim_realloc(csinfo, sizeof(csinfo_T)*csinfo_size);
if (csinfo == NULL)
{
vim_free(t_csinfo);
csinfo_size = 0;
}
}
if (csinfo == NULL)
return -1;
for (j = csinfo_size/2; j < csinfo_size; j++)
clear_csinfo(j);
}
if ((csinfo[i].fname = alloc(strlen(fname)+1)) == NULL)
return -1;
(void)strcpy(csinfo[i].fname, (const char *)fname);
if (ppath != NULL)
{
if ((csinfo[i].ppath = alloc(strlen(ppath) + 1)) == NULL)
{
VIM_CLEAR(csinfo[i].fname);
return -1;
}
(void)strcpy(csinfo[i].ppath, (const char *)ppath);
}
else
csinfo[i].ppath = NULL;
if (flags != NULL)
{
if ((csinfo[i].flags = alloc(strlen(flags) + 1)) == NULL)
{
VIM_CLEAR(csinfo[i].fname);
VIM_CLEAR(csinfo[i].ppath);
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;
}
/*
* 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;
}
/*
* Nuke em.
*/
static int
cs_kill(exarg_T *eap UNUSED)
{
char *stok;
int 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)semsg(_(e_cscope_connection_str_not_founc), 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;
}
/*
* 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,
_("cscope connection %s closed"), cname);
}
cs_release_csp(i, TRUE);
}
/*
* 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;
int amt;
if (search != NULL)
{
amt = (int)(strlen(fname) + strlen(slno) + strlen(tagstr) + strlen(search)+6);
if ((buf = alloc(amt)) == NULL)
return NULL;
(void)sprintf(buf, "%s\t%s\t%s;\"\t%s", tagstr, fname, slno, search);
}
else
{
amt = (int)(strlen(fname) + strlen(slno) + strlen(tagstr) + 5);
if ((buf = alloc(amt)) == NULL)
return NULL;
(void)sprintf(buf, "%s\t%s\t%s;\"", tagstr, fname, slno);
}
return buf;
}
/*
* 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--)
{
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
iemsg(e_fatal_error_in_cs_manage_matches);
return NULL;
}
return p;
}
/*
* 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(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;
}
#ifdef FEAT_QUICKFIX
/*
* Write cscope find results to file.
*/
static void
cs_file_results(FILE *f, int *nummatches_a)
{
int i, j;
char *buf;
char *search, *slno;
char *fullname;
char *cntx;
char *context;
buf = alloc(CSREAD_BUFSIZE);
if (buf == NULL)
return;
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 = alloc(strlen(cntx)+5);
if (context == NULL)
{
vim_free(fullname);
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);
}
#endif
/*
* 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 = alloc(CSREAD_BUFSIZE);
if (buf == NULL)
return;
if ((matches = ALLOC_MULT(char *, totmatches)) == NULL)
goto parse_out;
if ((cntxts = ALLOC_MULT(char *, totmatches)) == NULL)
goto parse_out;
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);
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:
if (totsofar == 0)
{
// No matches, free the arrays and return NULL in "*matches_p".
VIM_CLEAR(matches);
VIM_CLEAR(cntxts);
}
*matched = totsofar;
*matches_p = matches;
*cntxts_p = cntxts;
vim_free(buf);
}
/*
* 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 != '/'
#ifdef MSWIN
&& *--s != '\\'
#endif
)
;
if ((s > path && *s == '/')
#ifdef MSWIN
|| (s > path && *s == '\\')
#endif
)
++s;
return s;
}
/*
* Called from cs_manage_matches().
*/
static void
cs_print_tags_priv(char **matches, char **cntxts, int num_matches)
{
char *buf = NULL;
char *t_buf;
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 = alloc(strlen(matches[0]) + 1)) == NULL)
return;
strcpy(tbuf, matches[0]);
ptag = strtok(tbuf, "\t");
if (ptag == NULL)
{
vim_free(tbuf);
return;
}
newsize = (int)(strlen(cstag_msg) + strlen(ptag));
buf = 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 = alloc(strlen(matches[idx]) + 1)) == NULL)
continue;
(void)strcpy(tbuf, matches[idx]);
if (strtok(tbuf, (const char *)"\t") == NULL
|| (fname = strtok(NULL, (const char *)"\t")) == NULL
|| (lno = strtok(NULL, (const char *)"\t")) == NULL)
{
vim_free(tbuf);
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 = (int)(strlen(csfmt_str) + 16 + strlen(lno));
if (bufsize < newsize)
{
t_buf = buf;
buf = vim_realloc(buf, newsize);
if (buf == NULL)
{
bufsize = 0;
vim_free(t_buf);
}
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_outtrans_long_attr((char_u *)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 = (int)(strlen(context) + strlen(cntxformat));
if (bufsize < newsize)
{
t_buf = buf;
buf = vim_realloc(buf, newsize);
if (buf == NULL)
{
bufsize = 0;
vim_free(t_buf);
}
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_outtrans_long_attr((char_u *)buf, 0);
msg_putchar('\n');
}
if (extra != NULL)
{
msg_advance(13);
msg_outtrans_long_attr((char_u *)extra, 0);
}
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);
}
/*
* 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;
int maxlen;
static char *eprompt = "Press the RETURN key to continue:";
int epromptlen = (int)strlen(eprompt);
int n;
// compute maximum allowed len for Cscope error message
char *cs_emsg = _(e_cscope_error_str);
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 = 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)semsg(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)
{
if (buf != NULL && buf[0] != NUL)
(void)semsg(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;
}
#if defined(UNIX) && defined(SIGALRM)
/*
* Used to catch and ignore SIGALRM below.
*/
static void
sig_handler SIGDEFARG(sigarg)
{
// do nothing
}
#endif
/*
* 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
mch_delay(50L, 0); // 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;
}
mch_delay(50L, 0); // sleep 50 ms
}
}
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)
{
vim_free(csinfo[i].fname);
vim_free(csinfo[i].ppath);
vim_free(csinfo[i].flags);
}
clear_csinfo(i);
}
/*
* Calls cs_kill on all cscope connections then reinits.
*/
static int
cs_reset(exarg_T *eap UNUSED)
{
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 = ALLOC_MULT(char *, csinfo_size);
pplist = ALLOC_MULT(char *, csinfo_size);
fllist = ALLOC_MULT(char *, csinfo_size);
if (dblist == NULL || pplist == NULL || fllist == NULL)
{
vim_free(dblist);
vim_free(pplist);
vim_free(fllist);
return CSCOPE_FAILURE;
}
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));
}
}
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;
}
/*
* 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;
int len;
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.
*/
len = (int)(strlen(name) + 2);
if (csinfo[i].ppath != NULL)
len += (int)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 = alloc(MAXPATHL);
if (csdir != NULL)
{
vim_strncpy(csdir, (char_u *)csinfo[i].fname,
gettail((char_u *)csinfo[i].fname)
- (char_u *)csinfo[i].fname);
len += (int)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] != '/')
#ifdef MSWIN
&& name[0] != '\\' && name[1] != ':'
#endif
)
{
if ((fullname = alloc(len)) != NULL)
(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 = (char *)vim_strsave((char_u *)name);
}
vim_free(csdir);
return fullname;
}
/*
* Show all cscope connections.
*/
static int
cs_show(exarg_T *eap UNUSED)
{
int 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("%2d %-5ld %-34s %-32s",
i, (long)csinfo[i].pid, csinfo[i].fname, csinfo[i].ppath);
else
(void)smsg("%2d %-5ld %-34s <none>",
i, (long)csinfo[i].pid, csinfo[i].fname);
}
}
wait_return(FALSE);
return CSCOPE_SUCCESS;
}
/*
* 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);
vim_free(csinfo);
csinfo_size = 0;
}
#endif // FEAT_CSCOPE
#if defined(FEAT_EVAL) || defined(PROTO)
/*
* "cscope_connection([{num} , {dbpath} [, {prepend}]])" function
*
* Checks the existence of a cscope connection.
*/
void
f_cscope_connection(typval_T *argvars UNUSED, typval_T *rettv UNUSED)
{
# ifdef FEAT_CSCOPE
int num = 0;
char_u *dbpath = NULL;
char_u *prepend = NULL;
char_u buf[NUMBUFLEN];
if (in_vim9script()
&& (check_for_opt_number_arg(argvars, 0) == FAIL
|| (argvars[0].v_type != VAR_UNKNOWN
&& (check_for_opt_string_arg(argvars, 1) == FAIL
|| (argvars[1].v_type != VAR_UNKNOWN
&& check_for_opt_string_arg(argvars, 2) == FAIL)))))
return;
if (argvars[0].v_type != VAR_UNKNOWN
&& argvars[1].v_type != VAR_UNKNOWN)
{
num = (int)tv_get_number(&argvars[0]);
dbpath = tv_get_string(&argvars[1]);
if (argvars[2].v_type != VAR_UNKNOWN)
prepend = tv_get_string_buf(&argvars[2], buf);
}
rettv->vval.v_number = cs_connection(num, dbpath, prepend);
# endif
}
#endif // FEAT_EVAL
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