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gerrit.omnirom.org / android_external_vim / refs/heads/android-16 / . / src / findfile.c
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/* vi:set ts=8 sts=4 sw=4 noet:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* findfile.c: Search for files in directories listed in 'path'
*/
#include "vim.h"
/*
* File searching functions for 'path', 'tags' and 'cdpath' options.
* External visible functions:
* vim_findfile_init() creates/initialises the search context
* vim_findfile_free_visited() free list of visited files/dirs of search
* context
* vim_findfile() find a file in the search context
* vim_findfile_cleanup() cleanup/free search context created by
* vim_findfile_init()
*
* All static functions and variables start with 'ff_'
*
* In general it works like this:
* First you create yourself a search context by calling vim_findfile_init().
* It is possible to give a search context from a previous call to
* vim_findfile_init(), so it can be reused. After this you call vim_findfile()
* until you are satisfied with the result or it returns NULL. On every call it
* returns the next file which matches the conditions given to
* vim_findfile_init(). If it doesn't find a next file it returns NULL.
*
* It is possible to call vim_findfile_init() again to reinitialise your search
* with some new parameters. Don't forget to pass your old search context to
* it, so it can reuse it and especially reuse the list of already visited
* directories. If you want to delete the list of already visited directories
* simply call vim_findfile_free_visited().
*
* When you are done call vim_findfile_cleanup() to free the search context.
*
* The function vim_findfile_init() has a long comment, which describes the
* needed parameters.
*
*
*
* ATTENTION:
* ==========
* Also we use an allocated search context here, these functions are NOT
* thread-safe!
*
* To minimize parameter passing (or because I'm to lazy), only the
* external visible functions get a search context as a parameter. This is
* then assigned to a static global, which is used throughout the local
* functions.
*/
/*
* type for the directory search stack
*/
typedef struct ff_stack
{
struct ff_stack *ffs_prev;
// the fix part (no wildcards) and the part containing the wildcards
// of the search path
string_T ffs_fix_path;
string_T ffs_wc_path;
// files/dirs found in the above directory, matched by the first wildcard
// of wc_part
char_u **ffs_filearray;
int ffs_filearray_size;
int ffs_filearray_cur; // needed for partly handled dirs
// to store status of partly handled directories
// 0: we work on this directory for the first time
// 1: this directory was partly searched in an earlier step
int ffs_stage;
// How deep are we in the directory tree?
// Counts backward from value of level parameter to vim_findfile_init
int ffs_level;
// Did we already expand '**' to an empty string?
int ffs_star_star_empty;
} ff_stack_T;
/*
* type for already visited directories or files.
*/
typedef struct ff_visited
{
struct ff_visited *ffv_next;
// Visited directories are different if the wildcard string are
// different. So we have to save it.
char_u *ffv_wc_path;
// for unix use inode etc for comparison (needed because of links), else
// use filename.
#ifdef UNIX
int ffv_dev_valid; // ffv_dev and ffv_ino were set
dev_t ffv_dev; // device number
ino_t ffv_ino; // inode number
#endif
// The memory for this struct is allocated according to the length of
// ffv_fname.
char_u ffv_fname[1]; // actually longer
} ff_visited_T;
/*
* We might have to manage several visited lists during a search.
* This is especially needed for the tags option. If tags is set to:
* "./++/tags,./++/TAGS,++/tags" (replace + with *)
* So we have to do 3 searches:
* 1) search from the current files directory downward for the file "tags"
* 2) search from the current files directory downward for the file "TAGS"
* 3) search from Vims current directory downwards for the file "tags"
* As you can see, the first and the third search are for the same file, so for
* the third search we can use the visited list of the first search. For the
* second search we must start from a empty visited list.
* The struct ff_visited_list_hdr is used to manage a linked list of already
* visited lists.
*/
typedef struct ff_visited_list_hdr
{
struct ff_visited_list_hdr *ffvl_next;
// the filename the attached visited list is for
char_u *ffvl_filename;
ff_visited_T *ffvl_visited_list;
} ff_visited_list_hdr_T;
/*
* '**' can be expanded to several directory levels.
* Set the default maximum depth.
*/
#define FF_MAX_STAR_STAR_EXPAND ((char_u)30)
/*
* The search context:
* ffsc_stack_ptr: the stack for the dirs to search
* ffsc_visited_list: the currently active visited list
* ffsc_dir_visited_list: the currently active visited list for search dirs
* ffsc_visited_lists_list: the list of all visited lists
* ffsc_dir_visited_lists_list: the list of all visited lists for search dirs
* ffsc_file_to_search: the file to search for
* ffsc_start_dir: the starting directory, if search path was relative
* ffsc_fix_path: the fix part of the given path (without wildcards)
* Needed for upward search.
* ffsc_wc_path: the part of the given path containing wildcards
* ffsc_level: how many levels of dirs to search downwards
* ffsc_stopdirs_v: array of stop directories for upward search
* ffsc_find_what: FINDFILE_BOTH, FINDFILE_DIR or FINDFILE_FILE
* ffsc_tagfile: searching for tags file, don't use 'suffixesadd'
*/
typedef struct ff_search_ctx_T
{
ff_stack_T *ffsc_stack_ptr;
ff_visited_list_hdr_T *ffsc_visited_list;
ff_visited_list_hdr_T *ffsc_dir_visited_list;
ff_visited_list_hdr_T *ffsc_visited_lists_list;
ff_visited_list_hdr_T *ffsc_dir_visited_lists_list;
string_T ffsc_file_to_search;
string_T ffsc_start_dir;
string_T ffsc_fix_path;
string_T ffsc_wc_path;
int ffsc_level;
string_T *ffsc_stopdirs_v;
int ffsc_find_what;
int ffsc_tagfile;
} ff_search_ctx_T;
// locally needed functions
static int ff_check_visited(ff_visited_T **, char_u *, size_t, char_u *, size_t);
static void vim_findfile_free_visited(void *search_ctx_arg);
static void vim_findfile_free_visited_list(ff_visited_list_hdr_T **list_headp);
static void ff_free_visited_list(ff_visited_T *vl);
static ff_visited_list_hdr_T* ff_get_visited_list(char_u *, size_t, ff_visited_list_hdr_T **list_headp);
static void ff_push(ff_search_ctx_T *search_ctx, ff_stack_T *stack_ptr);
static ff_stack_T *ff_pop(ff_search_ctx_T *search_ctx);
static void ff_clear(ff_search_ctx_T *search_ctx);
static void ff_free_stack_element(ff_stack_T *stack_ptr);
static ff_stack_T *ff_create_stack_element(char_u *, size_t, char_u *, size_t, int, int);
static int ff_path_in_stoplist(char_u *, int, string_T *);
static string_T ff_expand_buffer = {NULL, 0}; // used for expanding filenames
#if 0
/*
* if someone likes findfirst/findnext, here are the functions
* NOT TESTED!!
*/
static void *ff_fn_search_context = NULL;
char_u *
vim_findfirst(char_u *path, char_u *filename, int level)
{
ff_fn_search_context =
vim_findfile_init(path, filename, NULL, level, TRUE, FALSE,
ff_fn_search_context, rel_fname);
if (NULL == ff_fn_search_context)
return NULL;
else
return vim_findnext()
}
char_u *
vim_findnext(void)
{
char_u *ret = vim_findfile(ff_fn_search_context);
if (NULL == ret)
{
vim_findfile_cleanup(ff_fn_search_context);
ff_fn_search_context = NULL;
}
return ret;
}
#endif
/*
* Initialization routine for vim_findfile().
*
* Returns the newly allocated search context or NULL if an error occurred.
*
* Don't forget to clean up by calling vim_findfile_cleanup() if you are done
* with the search context.
*
* Find the file 'filename' in the directory 'path'.
* The parameter 'path' may contain wildcards. If so only search 'level'
* directories deep. The parameter 'level' is the absolute maximum and is
* not related to restricts given to the '**' wildcard. If 'level' is 100
* and you use '**200' vim_findfile() will stop after 100 levels.
*
* 'filename' cannot contain wildcards! It is used as-is, no backslashes to
* escape special characters.
*
* If 'stopdirs' is not NULL and nothing is found downward, the search is
* restarted on the next higher directory level. This is repeated until the
* start-directory of a search is contained in 'stopdirs'. 'stopdirs' has the
* format ";*<dirname>*\(;<dirname>\)*;\=$".
*
* If the 'path' is relative, the starting dir for the search is either VIM's
* current dir or if the path starts with "./" the current files dir.
* If the 'path' is absolute, the starting dir is that part of the path before
* the first wildcard.
*
* Upward search is only done on the starting dir.
*
* If 'free_visited' is TRUE the list of already visited files/directories is
* cleared. Set this to FALSE if you just want to search from another
* directory, but want to be sure that no directory from a previous search is
* searched again. This is useful if you search for a file at different places.
* The list of visited files/dirs can also be cleared with the function
* vim_findfile_free_visited().
*
* Set the parameter 'find_what' to FINDFILE_DIR if you want to search for
* directories only, FINDFILE_FILE for files only, FINDFILE_BOTH for both.
*
* A search context returned by a previous call to vim_findfile_init() can be
* passed in the parameter "search_ctx_arg". This context is reused and
* reinitialized with the new parameters. The list of already visited
* directories from this context is only deleted if the parameter
* "free_visited" is true. Be aware that the passed "search_ctx_arg" is freed
* if the reinitialization fails.
*
* If you don't have a search context from a previous call "search_ctx_arg"
* must be NULL.
*
* This function silently ignores a few errors, vim_findfile() will have
* limited functionality then.
*/
void *
vim_findfile_init(
char_u *path,
char_u *filename,
size_t filenamelen,
char_u *stopdirs UNUSED,
int level,
int free_visited,
int find_what,
void *search_ctx_arg,
int tagfile, // expanding names of tags files
char_u *rel_fname) // file name to use for "."
{
char_u *wc_part;
ff_stack_T *sptr;
ff_search_ctx_T *search_ctx;
int add_sep;
// If a search context is given by the caller, reuse it, else allocate a
// new one.
if (search_ctx_arg != NULL)
search_ctx = search_ctx_arg;
else
{
search_ctx = ALLOC_CLEAR_ONE(ff_search_ctx_T);
if (search_ctx == NULL)
goto error_return;
}
search_ctx->ffsc_find_what = find_what;
search_ctx->ffsc_tagfile = tagfile;
// clear the search context, but NOT the visited lists
ff_clear(search_ctx);
// clear visited list if wanted
if (free_visited == TRUE)
vim_findfile_free_visited(search_ctx);
else
{
// Reuse old visited lists. Get the visited list for the given
// filename. If no list for the current filename exists, creates a new
// one.
search_ctx->ffsc_visited_list = ff_get_visited_list(filename,
filenamelen, &search_ctx->ffsc_visited_lists_list);
if (search_ctx->ffsc_visited_list == NULL)
goto error_return;
search_ctx->ffsc_dir_visited_list = ff_get_visited_list(filename,
filenamelen, &search_ctx->ffsc_dir_visited_lists_list);
if (search_ctx->ffsc_dir_visited_list == NULL)
goto error_return;
}
if (ff_expand_buffer.string == NULL)
{
ff_expand_buffer.length = 0;
ff_expand_buffer.string = alloc(MAXPATHL);
if (ff_expand_buffer.string == NULL)
goto error_return;
}
// Store information on starting dir now if path is relative.
// If path is absolute, we do that later.
if (path[0] == '.'
&& (vim_ispathsep(path[1]) || path[1] == NUL)
&& (!tagfile || vim_strchr(p_cpo, CPO_DOTTAG) == NULL)
&& rel_fname != NULL)
{
int len = (int)(gettail(rel_fname) - rel_fname);
if (!vim_isAbsName(rel_fname) && len + 1 < MAXPATHL)
{
// Make the start dir an absolute path name.
vim_strncpy(ff_expand_buffer.string, rel_fname, len);
ff_expand_buffer.length = len;
search_ctx->ffsc_start_dir.string = FullName_save(ff_expand_buffer.string, FALSE);
if (search_ctx->ffsc_start_dir.string == NULL)
goto error_return;
search_ctx->ffsc_start_dir.length = STRLEN(search_ctx->ffsc_start_dir.string);
}
else
{
search_ctx->ffsc_start_dir.length = len;
search_ctx->ffsc_start_dir.string = vim_strnsave(rel_fname,
search_ctx->ffsc_start_dir.length);
if (search_ctx->ffsc_start_dir.string == NULL)
goto error_return;
}
if (*++path != NUL)
++path;
}
else if (*path == NUL || !vim_isAbsName(path))
{
#ifdef BACKSLASH_IN_FILENAME
// "c:dir" needs "c:" to be expanded, otherwise use current dir
if (*path != NUL && path[1] == ':')
{
char_u drive[3];
drive[0] = path[0];
drive[1] = ':';
drive[2] = NUL;
if (vim_FullName(drive, ff_expand_buffer.string, MAXPATHL, TRUE) == FAIL)
goto error_return;
path += 2;
}
else
#endif
if (mch_dirname(ff_expand_buffer.string, MAXPATHL) == FAIL)
goto error_return;
ff_expand_buffer.length = STRLEN(ff_expand_buffer.string);
search_ctx->ffsc_start_dir.length = ff_expand_buffer.length;
search_ctx->ffsc_start_dir.string = vim_strnsave(ff_expand_buffer.string,
search_ctx->ffsc_start_dir.length);
if (search_ctx->ffsc_start_dir.string == NULL)
goto error_return;
#ifdef BACKSLASH_IN_FILENAME
// A path that starts with "/dir" is relative to the drive, not to the
// directory (but not for "//machine/dir"). Only use the drive name.
if ((*path == '/' || *path == '\\')
&& path[1] != path[0]
&& search_ctx->ffsc_start_dir.string[1] == ':')
{
search_ctx->ffsc_start_dir.string[2] = NUL;
search_ctx->ffsc_start_dir.length = 2;
}
#endif
}
/*
* If stopdirs are given, split them into an array of pointers.
* If this fails (mem allocation), there is no upward search at all or a
* stop directory is not recognized -> continue silently.
* If stopdirs just contains a ";" or is empty,
* search_ctx->ffsc_stopdirs_v will only contain a NULL pointer. This
* is handled as unlimited upward search. See function
* ff_path_in_stoplist() for details.
*/
if (stopdirs != NULL)
{
char_u *walker = stopdirs;
int dircount;
while (*walker == ';')
walker++;
dircount = 1;
search_ctx->ffsc_stopdirs_v = ALLOC_ONE(string_T);
if (search_ctx->ffsc_stopdirs_v != NULL)
{
string_T *tmp; // for convenience
do
{
char_u *helper;
void *ptr;
size_t len;
helper = walker;
ptr = vim_realloc(search_ctx->ffsc_stopdirs_v,
(dircount + 1) * sizeof(string_T));
if (ptr)
search_ctx->ffsc_stopdirs_v = ptr;
else
// ignore, keep what we have and continue
break;
walker = vim_strchr(walker, ';');
len = walker ? (size_t)(walker - helper) : STRLEN(helper);
// "" means ascent till top of directory tree.
if (*helper != NUL && !vim_isAbsName(helper)
&& len + 1 < MAXPATHL)
{
// Make the stop dir an absolute path name.
vim_strncpy(ff_expand_buffer.string, helper, len);
ff_expand_buffer.length = len;
tmp = &search_ctx->ffsc_stopdirs_v[dircount - 1];
tmp->string = FullName_save(ff_expand_buffer.string, FALSE);
if (tmp->string != NULL)
tmp->length = STRLEN(tmp->string);
}
else
{
tmp = &search_ctx->ffsc_stopdirs_v[dircount - 1];
tmp->length = len;
tmp->string = vim_strnsave(helper, tmp->length);
if (tmp->string == NULL)
tmp->length = 0;
}
if (walker)
walker++;
dircount++;
} while (walker != NULL);
tmp = &search_ctx->ffsc_stopdirs_v[dircount - 1];
tmp->string = NULL;
tmp->length = 0;
}
}
search_ctx->ffsc_level = level;
/*
* split into:
* -fix path
* -wildcard_stuff (might be NULL)
*/
wc_part = vim_strchr(path, '*');
if (wc_part != NULL)
{
int llevel;
char *errpt;
// save the fix part of the path
search_ctx->ffsc_fix_path.length = (size_t)(wc_part - path);
search_ctx->ffsc_fix_path.string = vim_strnsave(path,
search_ctx->ffsc_fix_path.length);
if (search_ctx->ffsc_fix_path.string == NULL)
goto error_return;
/*
* copy wc_path and add restricts to the '**' wildcard.
* The octet after a '**' is used as a (binary) counter.
* So '**3' is transposed to '**^C' ('^C' is ASCII value 3)
* or '**76' is transposed to '**N'( 'N' is ASCII value 76).
* If no restrict is given after '**' the default is used.
* Due to this technique the path looks awful if you print it as a
* string.
*/
ff_expand_buffer.length = 0;
while (*wc_part != NUL)
{
if (ff_expand_buffer.length + 5 >= MAXPATHL)
{
emsg(_(e_path_too_long_for_completion));
break;
}
if (STRNCMP(wc_part, "**", 2) == 0)
{
ff_expand_buffer.string[ff_expand_buffer.length++] = *wc_part++;
ff_expand_buffer.string[ff_expand_buffer.length++] = *wc_part++;
llevel = strtol((char *)wc_part, &errpt, 10);
if ((char_u *)errpt != wc_part && llevel > 0 && llevel < 255)
ff_expand_buffer.string[ff_expand_buffer.length++] = llevel;
else if ((char_u *)errpt != wc_part && llevel == 0)
// restrict is 0 -> remove already added '**'
ff_expand_buffer.length -= 2;
else
ff_expand_buffer.string[ff_expand_buffer.length++] = FF_MAX_STAR_STAR_EXPAND;
wc_part = (char_u *)errpt;
if (*wc_part != NUL && !vim_ispathsep(*wc_part))
{
semsg(_(e_invalid_path_number_must_be_at_end_of_path_or_be_followed_by_str), PATHSEPSTR);
goto error_return;
}
}
else
ff_expand_buffer.string[ff_expand_buffer.length++] = *wc_part++;
}
ff_expand_buffer.string[ff_expand_buffer.length] = NUL;
search_ctx->ffsc_wc_path.length = ff_expand_buffer.length;
search_ctx->ffsc_wc_path.string = vim_strnsave(ff_expand_buffer.string,
search_ctx->ffsc_wc_path.length);
if (search_ctx->ffsc_wc_path.string == NULL)
goto error_return;
}
else
{
search_ctx->ffsc_fix_path.length = STRLEN(path);
search_ctx->ffsc_fix_path.string = vim_strnsave(path,
search_ctx->ffsc_fix_path.length);
if (search_ctx->ffsc_fix_path.string == NULL)
goto error_return;
}
if (search_ctx->ffsc_start_dir.string == NULL)
{
// store the fix part as startdir.
// This is needed if the parameter path is fully qualified.
search_ctx->ffsc_start_dir.length = search_ctx->ffsc_fix_path.length;
search_ctx->ffsc_start_dir.string = vim_strnsave(search_ctx->ffsc_fix_path.string,
search_ctx->ffsc_start_dir.length);
if (search_ctx->ffsc_start_dir.string == NULL)
goto error_return;
search_ctx->ffsc_fix_path.string[0] = NUL;
search_ctx->ffsc_fix_path.length = 0;
}
// create an absolute path
if (search_ctx->ffsc_start_dir.length
+ search_ctx->ffsc_fix_path.length + 3 >= MAXPATHL)
{
emsg(_(e_path_too_long_for_completion));
goto error_return;
}
add_sep = !after_pathsep(search_ctx->ffsc_start_dir.string,
search_ctx->ffsc_start_dir.string + search_ctx->ffsc_start_dir.length);
ff_expand_buffer.length = vim_snprintf(
(char *)ff_expand_buffer.string,
MAXPATHL,
"%s%s",
search_ctx->ffsc_start_dir.string,
add_sep ? PATHSEPSTR : "");
{
size_t bufsize = ff_expand_buffer.length + search_ctx->ffsc_fix_path.length + 1;
char_u *buf = alloc(bufsize);
if (buf == NULL)
goto error_return;
vim_snprintf(
(char *)buf,
bufsize,
"%s%s",
ff_expand_buffer.string,
search_ctx->ffsc_fix_path.string);
if (mch_isdir(buf))
{
if (search_ctx->ffsc_fix_path.length > 0)
{
add_sep = !after_pathsep(search_ctx->ffsc_fix_path.string,
search_ctx->ffsc_fix_path.string + search_ctx->ffsc_fix_path.length);
ff_expand_buffer.length += vim_snprintf(
(char *)ff_expand_buffer.string + ff_expand_buffer.length,
MAXPATHL - ff_expand_buffer.length,
"%s%s",
search_ctx->ffsc_fix_path.string,
add_sep ? PATHSEPSTR : "");
}
}
else
{
char_u *p = gettail(search_ctx->ffsc_fix_path.string);
int len = (int)search_ctx->ffsc_fix_path.length;
if (p > search_ctx->ffsc_fix_path.string)
{
// do not add '..' to the path and start upwards searching
len = (int)(p - search_ctx->ffsc_fix_path.string) - 1;
if ((len >= 2
&& STRNCMP(search_ctx->ffsc_fix_path.string, "..", 2) == 0)
&& (len == 2 || search_ctx->ffsc_fix_path.string[2] == PATHSEP))
{
vim_free(buf);
goto error_return;
}
add_sep = !after_pathsep(search_ctx->ffsc_fix_path.string,
search_ctx->ffsc_fix_path.string + search_ctx->ffsc_fix_path.length);
ff_expand_buffer.length += vim_snprintf(
(char *)ff_expand_buffer.string + ff_expand_buffer.length,
MAXPATHL - ff_expand_buffer.length,
"%.*s%s",
len,
search_ctx->ffsc_fix_path.string,
add_sep ? PATHSEPSTR : "");
}
if (search_ctx->ffsc_wc_path.string != NULL)
{
size_t tempsize = (search_ctx->ffsc_fix_path.length - len)
+ search_ctx->ffsc_wc_path.length
+ 1;
char_u *temp = alloc(tempsize);
if (temp == NULL)
{
vim_free(buf);
vim_free(temp);
goto error_return;
}
search_ctx->ffsc_wc_path.length = vim_snprintf(
(char *)temp,
tempsize,
"%s%s",
search_ctx->ffsc_fix_path.string + len,
search_ctx->ffsc_wc_path.string);
vim_free(search_ctx->ffsc_wc_path.string);
search_ctx->ffsc_wc_path.string = temp;
}
}
vim_free(buf);
}
sptr = ff_create_stack_element(ff_expand_buffer.string,
ff_expand_buffer.length,
search_ctx->ffsc_wc_path.string,
search_ctx->ffsc_wc_path.length,
level,
0);
if (sptr == NULL)
goto error_return;
ff_push(search_ctx, sptr);
search_ctx->ffsc_file_to_search.length = filenamelen;
search_ctx->ffsc_file_to_search.string = vim_strnsave(filename,
search_ctx->ffsc_file_to_search.length);
if (search_ctx->ffsc_file_to_search.string == NULL)
goto error_return;
return search_ctx;
error_return:
/*
* We clear the search context now!
* Even when the caller gave us a (perhaps valid) context we free it here,
* as we might have already destroyed it.
*/
vim_findfile_cleanup(search_ctx);
return NULL;
}
/*
* Get the stopdir string. Check that ';' is not escaped.
*/
char_u *
vim_findfile_stopdir(char_u *buf)
{
char_u *r_ptr = buf;
char_u *r_ptr_end = NULL; // points to NUL at end of string "r_ptr"
while (*r_ptr != NUL && *r_ptr != ';')
{
if (r_ptr[0] == '\\' && r_ptr[1] == ';')
{
// Overwrite the escape char,
// use STRLEN(r_ptr) to move the trailing '\0'.
if (r_ptr_end == NULL)
r_ptr_end = r_ptr + STRLEN(r_ptr);
mch_memmove(r_ptr, r_ptr + 1,
(size_t)(r_ptr_end - (r_ptr + 1)) + 1); // +1 for NUL
r_ptr++;
--r_ptr_end;
}
r_ptr++;
}
if (*r_ptr == ';')
{
*r_ptr = NUL;
r_ptr++;
}
else if (*r_ptr == NUL)
r_ptr = NULL;
return r_ptr;
}
/*
* Clean up the given search context. Can handle a NULL pointer.
*/
void
vim_findfile_cleanup(void *ctx)
{
if (ctx == NULL)
return;
vim_findfile_free_visited(ctx);
ff_clear(ctx);
vim_free(ctx);
}
/*
* Find a file in a search context.
* The search context was created with vim_findfile_init() above.
* Return a pointer to an allocated file name or NULL if nothing found.
* To get all matching files call this function until you get NULL.
*
* If the passed search_context is NULL, NULL is returned.
*
* The search algorithm is depth first. To change this replace the
* stack with a list (don't forget to leave partly searched directories on the
* top of the list).
*/
char_u *
vim_findfile(void *search_ctx_arg)
{
string_T file_path;
string_T rest_of_wildcards;
char_u *path_end = NULL;
ff_stack_T *stackp;
ff_search_ctx_T *search_ctx;
if (search_ctx_arg == NULL)
return NULL;
search_ctx = (ff_search_ctx_T *)search_ctx_arg;
/*
* filepath is used as buffer for various actions and as the storage to
* return a found filename.
*/
if ((file_path.string = alloc(MAXPATHL)) == NULL)
return NULL;
// store the end of the start dir -- needed for upward search
if (search_ctx->ffsc_start_dir.string != NULL)
path_end = &search_ctx->ffsc_start_dir.string[
search_ctx->ffsc_start_dir.length];
// upward search loop
for (;;)
{
// downward search loop
for (;;)
{
// check if user wants to stop the search
ui_breakcheck();
if (got_int)
break;
// get directory to work on from stack
stackp = ff_pop(search_ctx);
if (stackp == NULL)
break;
/*
* TODO: decide if we leave this test in
*
* GOOD: don't search a directory(-tree) twice.
* BAD: - check linked list for every new directory entered.
* - check for double files also done below
*
* Here we check if we already searched this directory.
* We already searched a directory if:
* 1) The directory is the same.
* 2) We would use the same wildcard string.
*
* Good if you have links on same directory via several ways
* or you have selfreferences in directories (e.g. SuSE Linux 6.3:
* /etc/rc.d/init.d is linked to /etc/rc.d -> endless loop)
*
* This check is only needed for directories we work on for the
* first time (hence stackp->ff_filearray == NULL)
*/
if (stackp->ffs_filearray == NULL
&& ff_check_visited(&search_ctx->ffsc_dir_visited_list
->ffvl_visited_list,
stackp->ffs_fix_path.string,
stackp->ffs_fix_path.length,
stackp->ffs_wc_path.string,
stackp->ffs_wc_path.length) == FAIL)
{
#ifdef FF_VERBOSE
if (p_verbose >= 5)
{
verbose_enter_scroll();
smsg("Already Searched: %s (%s)",
stackp->ffs_fix_path.string, stackp->ffs_wc_path.string);
// don't overwrite this either
msg_puts("\n");
verbose_leave_scroll();
}
#endif
ff_free_stack_element(stackp);
continue;
}
#ifdef FF_VERBOSE
else if (p_verbose >= 5)
{
verbose_enter_scroll();
smsg("Searching: %s (%s)",
stackp->ffs_fix_path.string, stackp->ffs_wc_path.string);
// don't overwrite this either
msg_puts("\n");
verbose_leave_scroll();
}
#endif
// check depth
if (stackp->ffs_level <= 0)
{
ff_free_stack_element(stackp);
continue;
}
file_path.string[0] = NUL;
file_path.length = 0;
/*
* If no filearray till now expand wildcards
* The function expand_wildcards() can handle an array of paths
* and all possible expands are returned in one array. We use this
* to handle the expansion of '**' into an empty string.
*/
if (stackp->ffs_filearray == NULL)
{
char_u *dirptrs[2];
// we use filepath to build the path expand_wildcards() should
// expand.
dirptrs[0] = file_path.string;
dirptrs[1] = NULL;
// if we have a start dir copy it in
if (!vim_isAbsName(stackp->ffs_fix_path.string)
&& search_ctx->ffsc_start_dir.string)
{
if (search_ctx->ffsc_start_dir.length + 1 < MAXPATHL)
{
int add_sep = !after_pathsep(search_ctx->ffsc_start_dir.string,
search_ctx->ffsc_start_dir.string + search_ctx->ffsc_start_dir.length);
file_path.length = vim_snprintf(
(char *)file_path.string,
MAXPATHL,
"%s%s",
search_ctx->ffsc_start_dir.string,
add_sep ? PATHSEPSTR : "");
}
else
{
ff_free_stack_element(stackp);
goto fail;
}
}
// append the fix part of the search path
if (file_path.length + stackp->ffs_fix_path.length + 1 < MAXPATHL)
{
int add_sep = !after_pathsep(stackp->ffs_fix_path.string,
stackp->ffs_fix_path.string + stackp->ffs_fix_path.length);
file_path.length += vim_snprintf(
(char *)file_path.string + file_path.length,
MAXPATHL - file_path.length,
"%s%s",
stackp->ffs_fix_path.string,
add_sep ? PATHSEPSTR : "");
}
else
{
ff_free_stack_element(stackp);
goto fail;
}
rest_of_wildcards.string = stackp->ffs_wc_path.string;
rest_of_wildcards.length = stackp->ffs_wc_path.length;
if (*rest_of_wildcards.string != NUL)
{
if (STRNCMP(rest_of_wildcards.string, "**", 2) == 0)
{
char_u *p;
// pointer to the restrict byte
// The restrict byte is not a character!
p = rest_of_wildcards.string + 2;
if (*p > 0)
{
(*p)--;
if (file_path.length + 1 < MAXPATHL)
file_path.string[file_path.length++] = '*';
else
{
ff_free_stack_element(stackp);
goto fail;
}
}
if (*p == 0)
{
// remove '**<numb> from wildcards
mch_memmove(rest_of_wildcards.string,
rest_of_wildcards.string + 3,
(size_t)(rest_of_wildcards.length - 3) + 1); // +1 for NUL
rest_of_wildcards.length -= 3;
stackp->ffs_wc_path.length = rest_of_wildcards.length;
}
else
{
rest_of_wildcards.string += 3;
rest_of_wildcards.length -= 3;
}
if (stackp->ffs_star_star_empty == 0)
{
// if not done before, expand '**' to empty
stackp->ffs_star_star_empty = 1;
dirptrs[1] = stackp->ffs_fix_path.string;
}
}
/*
* Here we copy until the next path separator or the end of
* the path. If we stop at a path separator, there is
* still something else left. This is handled below by
* pushing every directory returned from expand_wildcards()
* on the stack again for further search.
*/
while (*rest_of_wildcards.string
&& !vim_ispathsep(*rest_of_wildcards.string))
{
if (file_path.length + 1 < MAXPATHL)
{
file_path.string[file_path.length++] = *rest_of_wildcards.string++;
--rest_of_wildcards.length;
}
else
{
ff_free_stack_element(stackp);
goto fail;
}
}
file_path.string[file_path.length] = NUL;
if (vim_ispathsep(*rest_of_wildcards.string))
{
rest_of_wildcards.string++;
rest_of_wildcards.length--;
}
}
/*
* Expand wildcards like "*" and "$VAR".
* If the path is a URL don't try this.
*/
if (path_with_url(dirptrs[0]))
{
stackp->ffs_filearray = ALLOC_ONE(char_u *);
if (stackp->ffs_filearray != NULL
&& (stackp->ffs_filearray[0]
= vim_strnsave(dirptrs[0], file_path.length)) != NULL)
stackp->ffs_filearray_size = 1;
else
stackp->ffs_filearray_size = 0;
}
else
// Add EW_NOTWILD because the expanded path may contain
// wildcard characters that are to be taken literally.
// This is a bit of a hack.
expand_wildcards((dirptrs[1] == NULL) ? 1 : 2, dirptrs,
&stackp->ffs_filearray_size,
&stackp->ffs_filearray,
EW_DIR|EW_ADDSLASH|EW_SILENT|EW_NOTWILD);
stackp->ffs_filearray_cur = 0;
stackp->ffs_stage = 0;
}
else
{
rest_of_wildcards.string = &stackp->ffs_wc_path.string[
stackp->ffs_wc_path.length];
rest_of_wildcards.length = 0;
}
if (stackp->ffs_stage == 0)
{
int i;
// this is the first time we work on this directory
if (*rest_of_wildcards.string == NUL)
{
size_t len;
char_u *suf;
/*
* We don't have further wildcards to expand, so we have to
* check for the final file now.
*/
for (i = stackp->ffs_filearray_cur;
i < stackp->ffs_filearray_size; ++i)
{
if (!path_with_url(stackp->ffs_filearray[i])
&& !mch_isdir(stackp->ffs_filearray[i]))
continue; // not a directory
// prepare the filename to be checked for existence
// below
len = STRLEN(stackp->ffs_filearray[i]);
if (len + 1 + search_ctx->ffsc_file_to_search.length
< MAXPATHL)
{
int add_sep = !after_pathsep(stackp->ffs_filearray[i],
stackp->ffs_filearray[i] + len);
file_path.length = vim_snprintf(
(char *)file_path.string,
MAXPATHL,
"%s%s%s",
stackp->ffs_filearray[i],
add_sep ? PATHSEPSTR : "",
search_ctx->ffsc_file_to_search.string);
}
else
{
ff_free_stack_element(stackp);
goto fail;
}
/*
* Try without extra suffix and then with suffixes
* from 'suffixesadd'.
*/
len = file_path.length;
if (search_ctx->ffsc_tagfile)
suf = (char_u *)"";
else
suf = curbuf->b_p_sua;
for (;;)
{
// if file exists and we didn't already find it
if ((path_with_url(file_path.string)
|| (mch_getperm(file_path.string) >= 0
&& (search_ctx->ffsc_find_what
== FINDFILE_BOTH
|| ((search_ctx->ffsc_find_what
== FINDFILE_DIR)
== mch_isdir(file_path.string)))))
#ifndef FF_VERBOSE
&& (ff_check_visited(
&search_ctx->ffsc_visited_list
->ffvl_visited_list,
file_path.string,
file_path.length,
(char_u *)"", 0) == OK)
#endif
)
{
#ifdef FF_VERBOSE
if (ff_check_visited(
&search_ctx->ffsc_visited_list
->ffvl_visited_list,
file_path.string,
file_path.length,
(char_u *)"", 0) == FAIL)
{
if (p_verbose >= 5)
{
verbose_enter_scroll();
smsg("Already: %s", file_path.string);
// don't overwrite this either
msg_puts("\n");
verbose_leave_scroll();
}
continue;
}
#endif
// push dir to examine rest of subdirs later
stackp->ffs_filearray_cur = i + 1;
ff_push(search_ctx, stackp);
if (!path_with_url(file_path.string))
file_path.length = simplify_filename(file_path.string);
if (mch_dirname(ff_expand_buffer.string, MAXPATHL)
== OK)
{
char_u *p;
ff_expand_buffer.length = STRLEN(ff_expand_buffer.string);
p = shorten_fname(file_path.string,
ff_expand_buffer.string);
if (p != NULL)
{
mch_memmove(file_path.string, p,
(size_t)((file_path.string + file_path.length) - p) + 1); // +1 for NUL
file_path.length -= (p - file_path.string);
}
}
#ifdef FF_VERBOSE
if (p_verbose >= 5)
{
verbose_enter_scroll();
smsg("HIT: %s", file_path.string);
// don't overwrite this either
msg_puts("\n");
verbose_leave_scroll();
}
#endif
return file_path.string;
}
// Not found or found already, try next suffix.
if (*suf == NUL)
break;
file_path.length = len + copy_option_part(&suf,
file_path.string + len,
(int)(MAXPATHL - len), ",");
}
}
}
else
{
/*
* still wildcards left, push the directories for further
* search
*/
for (i = stackp->ffs_filearray_cur;
i < stackp->ffs_filearray_size; ++i)
{
if (!mch_isdir(stackp->ffs_filearray[i]))
continue; // not a directory
ff_push(search_ctx,
ff_create_stack_element(
stackp->ffs_filearray[i],
STRLEN(stackp->ffs_filearray[i]),
rest_of_wildcards.string,
rest_of_wildcards.length,
stackp->ffs_level - 1, 0));
}
}
stackp->ffs_filearray_cur = 0;
stackp->ffs_stage = 1;
}
/*
* if wildcards contains '**' we have to descent till we reach the
* leaves of the directory tree.
*/
if (STRNCMP(stackp->ffs_wc_path.string, "**", 2) == 0)
{
int i;
for (i = stackp->ffs_filearray_cur;
i < stackp->ffs_filearray_size; ++i)
{
if (fnamecmp(stackp->ffs_filearray[i],
stackp->ffs_fix_path.string) == 0)
continue; // don't repush same directory
if (!mch_isdir(stackp->ffs_filearray[i]))
continue; // not a directory
ff_push(search_ctx,
ff_create_stack_element(
stackp->ffs_filearray[i],
STRLEN(stackp->ffs_filearray[i]),
stackp->ffs_wc_path.string,
stackp->ffs_wc_path.length,
stackp->ffs_level - 1, 1));
}
}
// we are done with the current directory
ff_free_stack_element(stackp);
}
// If we reached this, we didn't find anything downwards.
// Let's check if we should do an upward search.
if (search_ctx->ffsc_start_dir.string
&& search_ctx->ffsc_stopdirs_v != NULL && !got_int)
{
ff_stack_T *sptr;
// path_end may point to the NUL or the previous path separator
int plen = (path_end - search_ctx->ffsc_start_dir.string)
+ (*path_end != NUL);
// is the last starting directory in the stop list?
if (ff_path_in_stoplist(search_ctx->ffsc_start_dir.string,
plen, search_ctx->ffsc_stopdirs_v) == TRUE)
break;
// cut of last dir
while (path_end > search_ctx->ffsc_start_dir.string
&& vim_ispathsep(*path_end))
path_end--;
while (path_end > search_ctx->ffsc_start_dir.string
&& !vim_ispathsep(path_end[-1]))
path_end--;
*path_end = NUL;
// we may have shortened search_ctx->ffsc_start_dir, so update it's length
search_ctx->ffsc_start_dir.length = (size_t)(path_end - search_ctx->ffsc_start_dir.string);
path_end--;
if (*search_ctx->ffsc_start_dir.string == NUL)
break;
if (search_ctx->ffsc_start_dir.length + 1
+ search_ctx->ffsc_fix_path.length < MAXPATHL)
{
int add_sep = !after_pathsep(search_ctx->ffsc_start_dir.string,
search_ctx->ffsc_start_dir.string + search_ctx->ffsc_start_dir.length);
file_path.length = vim_snprintf(
(char *)file_path.string,
MAXPATHL,
"%s%s%s",
search_ctx->ffsc_start_dir.string,
add_sep ? PATHSEPSTR : "",
search_ctx->ffsc_fix_path.string);
}
else
goto fail;
// create a new stack entry
sptr = ff_create_stack_element(file_path.string, file_path.length,
search_ctx->ffsc_wc_path.string, search_ctx->ffsc_wc_path.length,
search_ctx->ffsc_level, 0);
if (sptr == NULL)
break;
ff_push(search_ctx, sptr);
}
else
break;
}
fail:
vim_free(file_path.string);
return NULL;
}
/*
* Free the list of lists of visited files and directories
* Can handle it if the passed search_context is NULL;
*/
static void
vim_findfile_free_visited(void *search_ctx_arg)
{
ff_search_ctx_T *search_ctx;
if (search_ctx_arg == NULL)
return;
search_ctx = (ff_search_ctx_T *)search_ctx_arg;
vim_findfile_free_visited_list(&search_ctx->ffsc_visited_lists_list);
vim_findfile_free_visited_list(&search_ctx->ffsc_dir_visited_lists_list);
}
static void
vim_findfile_free_visited_list(ff_visited_list_hdr_T **list_headp)
{
ff_visited_list_hdr_T *vp;
while (*list_headp != NULL)
{
vp = (*list_headp)->ffvl_next;
ff_free_visited_list((*list_headp)->ffvl_visited_list);
vim_free((*list_headp)->ffvl_filename);
vim_free(*list_headp);
*list_headp = vp;
}
*list_headp = NULL;
}
static void
ff_free_visited_list(ff_visited_T *vl)
{
ff_visited_T *vp;
while (vl != NULL)
{
vp = vl->ffv_next;
vim_free(vl->ffv_wc_path);
vim_free(vl);
vl = vp;
}
vl = NULL;
}
/*
* Returns the already visited list for the given filename. If none is found it
* allocates a new one.
*/
static ff_visited_list_hdr_T*
ff_get_visited_list(
char_u *filename,
size_t filenamelen,
ff_visited_list_hdr_T **list_headp)
{
ff_visited_list_hdr_T *retptr = NULL;
// check if a visited list for the given filename exists
if (*list_headp != NULL)
{
retptr = *list_headp;
while (retptr != NULL)
{
if (fnamecmp(filename, retptr->ffvl_filename) == 0)
{
#ifdef FF_VERBOSE
if (p_verbose >= 5)
{
verbose_enter_scroll();
smsg("ff_get_visited_list: FOUND list for %s",
filename);
// don't overwrite this either
msg_puts("\n");
verbose_leave_scroll();
}
#endif
return retptr;
}
retptr = retptr->ffvl_next;
}
}
#ifdef FF_VERBOSE
if (p_verbose >= 5)
{
verbose_enter_scroll();
smsg("ff_get_visited_list: new list for %s", filename);
// don't overwrite this either
msg_puts("\n");
verbose_leave_scroll();
}
#endif
/*
* if we reach this we didn't find a list and we have to allocate new list
*/
retptr = ALLOC_ONE(ff_visited_list_hdr_T);
if (retptr == NULL)
return NULL;
retptr->ffvl_visited_list = NULL;
retptr->ffvl_filename = vim_strnsave(filename, filenamelen);
if (retptr->ffvl_filename == NULL)
{
vim_free(retptr);
return NULL;
}
retptr->ffvl_next = *list_headp;
*list_headp = retptr;
return retptr;
}
/*
* check if two wildcard paths are equal. Returns TRUE or FALSE.
* They are equal if:
* - both paths are NULL
* - they have the same length
* - char by char comparison is OK
* - the only differences are in the counters behind a '**', so
* '**\20' is equal to '**\24'
*/
static int
ff_wc_equal(char_u *s1, char_u *s2)
{
int i, j;
int c1 = NUL;
int c2 = NUL;
int prev1 = NUL;
int prev2 = NUL;
if (s1 == s2)
return TRUE;
if (s1 == NULL || s2 == NULL)
return FALSE;
for (i = 0, j = 0; s1[i] != NUL && s2[j] != NUL;)
{
c1 = PTR2CHAR(s1 + i);
c2 = PTR2CHAR(s2 + j);
if ((p_fic ? MB_TOLOWER(c1) != MB_TOLOWER(c2) : c1 != c2)
&& (prev1 != '*' || prev2 != '*'))
return FALSE;
prev2 = prev1;
prev1 = c1;
i += mb_ptr2len(s1 + i);
j += mb_ptr2len(s2 + j);
}
return s1[i] == s2[j];
}
/*
* maintains the list of already visited files and dirs
* returns FAIL if the given file/dir is already in the list
* returns OK if it is newly added
*
* TODO: What to do on memory allocation problems?
* -> return TRUE - Better the file is found several times instead of
* never.
*/
static int
ff_check_visited(
ff_visited_T **visited_list,
char_u *fname,
size_t fnamelen,
char_u *wc_path,
size_t wc_pathlen)
{
ff_visited_T *vp;
#ifdef UNIX
stat_T st;
int url = FALSE;
#endif
// For a URL we only compare the name, otherwise we compare the
// device/inode (unix) or the full path name (not Unix).
if (path_with_url(fname))
{
vim_strncpy(ff_expand_buffer.string, fname, fnamelen);
ff_expand_buffer.length = fnamelen;
#ifdef UNIX
url = TRUE;
#endif
}
else
{
ff_expand_buffer.string[0] = NUL;
ff_expand_buffer.length = 0;
#ifdef UNIX
if (mch_stat((char *)fname, &st) < 0)
return FAIL;
#else
if (vim_FullName(fname, ff_expand_buffer.string, MAXPATHL, TRUE) == FAIL)
return FAIL;
ff_expand_buffer.length = STRLEN(ff_expand_buffer.string);
#endif
}
// check against list of already visited files
for (vp = *visited_list; vp != NULL; vp = vp->ffv_next)
{
if (
#ifdef UNIX
!url ? (vp->ffv_dev_valid && vp->ffv_dev == st.st_dev
&& vp->ffv_ino == st.st_ino)
:
#endif
fnamecmp(vp->ffv_fname, ff_expand_buffer.string) == 0
)
{
// are the wildcard parts equal
if (ff_wc_equal(vp->ffv_wc_path, wc_path) == TRUE)
// already visited
return FAIL;
}
}
/*
* New file/dir. Add it to the list of visited files/dirs.
*/
vp = alloc(
offsetof(ff_visited_T, ffv_fname) + ff_expand_buffer.length + 1);
if (vp == NULL)
return OK;
#ifdef UNIX
if (!url)
{
vp->ffv_dev_valid = TRUE;
vp->ffv_dev = st.st_dev;
vp->ffv_ino = st.st_ino;
vp->ffv_fname[0] = NUL;
}
else
{
vp->ffv_dev_valid = FALSE;
#endif
STRCPY(vp->ffv_fname, ff_expand_buffer.string);
#ifdef UNIX
}
#endif
if (wc_path != NULL)
vp->ffv_wc_path = vim_strnsave(wc_path, wc_pathlen);
else
vp->ffv_wc_path = NULL;
vp->ffv_next = *visited_list;
*visited_list = vp;
return OK;
}
/*
* create stack element from given path pieces
*/
static ff_stack_T *
ff_create_stack_element(
char_u *fix_part,
size_t fix_partlen,
char_u *wc_part,
size_t wc_partlen,
int level,
int star_star_empty)
{
ff_stack_T *new;
new = ALLOC_ONE(ff_stack_T);
if (new == NULL)
return NULL;
new->ffs_prev = NULL;
new->ffs_filearray = NULL;
new->ffs_filearray_size = 0;
new->ffs_filearray_cur = 0;
new->ffs_stage = 0;
new->ffs_level = level;
new->ffs_star_star_empty = star_star_empty;
// the following saves NULL pointer checks in vim_findfile
if (fix_part == NULL)
{
fix_part = (char_u *)"";
fix_partlen = 0;
}
new->ffs_fix_path.string = vim_strnsave(fix_part, fix_partlen);
new->ffs_fix_path.length = fix_partlen;
if (wc_part == NULL)
{
wc_part = (char_u *)"";
wc_partlen = 0;
}
new->ffs_wc_path.string = vim_strnsave(wc_part, wc_partlen);
new->ffs_wc_path.length = wc_partlen;
if (new->ffs_fix_path.string == NULL || new->ffs_wc_path.string == NULL)
{
ff_free_stack_element(new);
new = NULL;
}
return new;
}
/*
* Push a dir on the directory stack.
*/
static void
ff_push(ff_search_ctx_T *search_ctx, ff_stack_T *stack_ptr)
{
// check for NULL pointer, not to return an error to the user, but
// to prevent a crash
if (stack_ptr == NULL)
return;
stack_ptr->ffs_prev = search_ctx->ffsc_stack_ptr;
search_ctx->ffsc_stack_ptr = stack_ptr;
}
/*
* Pop a dir from the directory stack.
* Returns NULL if stack is empty.
*/
static ff_stack_T *
ff_pop(ff_search_ctx_T *search_ctx)
{
ff_stack_T *sptr;
sptr = search_ctx->ffsc_stack_ptr;
if (search_ctx->ffsc_stack_ptr != NULL)
search_ctx->ffsc_stack_ptr = search_ctx->ffsc_stack_ptr->ffs_prev;
return sptr;
}
/*
* free the given stack element
*/
static void
ff_free_stack_element(ff_stack_T *stack_ptr)
{
// VIM_CLEAR_STRING handles possible NULL pointers
VIM_CLEAR_STRING(stack_ptr->ffs_fix_path);
VIM_CLEAR_STRING(stack_ptr->ffs_wc_path);
if (stack_ptr->ffs_filearray != NULL)
FreeWild(stack_ptr->ffs_filearray_size, stack_ptr->ffs_filearray);
vim_free(stack_ptr);
}
/*
* Clear the search context, but NOT the visited list.
*/
static void
ff_clear(ff_search_ctx_T *search_ctx)
{
ff_stack_T *sptr;
// clear up stack
while ((sptr = ff_pop(search_ctx)) != NULL)
ff_free_stack_element(sptr);
if (search_ctx->ffsc_stopdirs_v != NULL)
{
int i = 0;
while (search_ctx->ffsc_stopdirs_v[i].string != NULL)
{
vim_free(search_ctx->ffsc_stopdirs_v[i].string);
i++;
}
VIM_CLEAR(search_ctx->ffsc_stopdirs_v);
}
// reset everything
VIM_CLEAR_STRING(search_ctx->ffsc_file_to_search);
VIM_CLEAR_STRING(search_ctx->ffsc_start_dir);
VIM_CLEAR_STRING(search_ctx->ffsc_fix_path);
VIM_CLEAR_STRING(search_ctx->ffsc_wc_path);
search_ctx->ffsc_level = 0;
}
/*
* check if the given path is in the stopdirs
* returns TRUE if yes else FALSE
*/
static int
ff_path_in_stoplist(char_u *path, int path_len, string_T *stopdirs_v)
{
int i = 0;
// eat up trailing path separators, except the first
while (path_len > 1 && vim_ispathsep(path[path_len - 1]))
path_len--;
// if no path consider it as match
if (path_len == 0)
return TRUE;
for (i = 0; stopdirs_v[i].string != NULL; i++)
// match for parent directory. So '/home' also matches
// '/home/rks'. Check for PATHSEP in stopdirs_v[i], else
// '/home/r' would also match '/home/rks'
if (fnamencmp(stopdirs_v[i].string, path, path_len) == 0
&& ((int)stopdirs_v[i].length <= path_len
|| vim_ispathsep(stopdirs_v[i].string[path_len])))
return TRUE;
return FALSE;
}
/*
* Find the file name "ptr[len]" in the path. Also finds directory names.
*
* On the first call set the parameter 'first' to TRUE to initialize
* the search. For repeating calls to FALSE.
*
* Repeating calls will return other files called 'ptr[len]' from the path.
*
* Only on the first call 'ptr' and 'len' are used. For repeating calls they
* don't need valid values.
*
* If nothing found on the first call the option FNAME_MESS will issue the
* message:
* 'Can't find file "<file>" in path'
* On repeating calls:
* 'No more file "<file>" found in path'
*
* options:
* FNAME_MESS give error message when not found
*
* Uses NameBuff[]!
*
* Returns an allocated string for the file name. NULL for error.
*
*/
char_u *
find_file_in_path(
char_u *ptr, // file name
int len, // length of file name
int options,
int first, // use count'th matching file name
char_u *rel_fname, // file name searching relative to
char_u **file_to_find, // in/out: modified copy of file name
char **search_ctx) // in/out: state of the search
{
return find_file_in_path_option(ptr, len, options, first,
*curbuf->b_p_path == NUL ? p_path : curbuf->b_p_path,
FINDFILE_BOTH, rel_fname, curbuf->b_p_sua,
file_to_find, search_ctx);
}
# if defined(EXITFREE) || defined(PROTO)
void
free_findfile(void)
{
VIM_CLEAR_STRING(ff_expand_buffer);
}
# endif
/*
* Find the directory name "ptr[len]" in the path.
*
* options:
* FNAME_MESS give error message when not found
* FNAME_UNESC unescape backslashes.
*
* Uses NameBuff[]!
*
* Returns an allocated string for the file name. NULL for error.
*/
char_u *
find_directory_in_path(
char_u *ptr, // file name
int len, // length of file name
int options,
char_u *rel_fname, // file name searching relative to
char_u **file_to_find, // in/out: modified copy of file name
char **search_ctx) // in/out: state of the search
{
return find_file_in_path_option(ptr, len, options, TRUE, p_cdpath,
FINDFILE_DIR, rel_fname, (char_u *)"",
file_to_find, search_ctx);
}
char_u *
find_file_in_path_option(
char_u *ptr, // file name
int len, // length of file name
int options,
int first, // use count'th matching file name
char_u *path_option, // p_path or p_cdpath
int find_what, // FINDFILE_FILE, _DIR or _BOTH
char_u *rel_fname, // file name we are looking relative to.
char_u *suffixes, // list of suffixes, 'suffixesadd' option
char_u **file_to_find, // in/out: modified copy of file name
char **search_ctx_arg) // in/out: state of the search
{
ff_search_ctx_T **search_ctx = (ff_search_ctx_T **)search_ctx_arg;
static char_u *dir;
static int did_findfile_init = FALSE;
char_u *file_name = NULL;
int rel_to_curdir;
# ifdef AMIGA
struct Process *proc = (struct Process *)FindTask(0L);
APTR save_winptr = proc->pr_WindowPtr;
// Avoid a requester here for a volume that doesn't exist.
proc->pr_WindowPtr = (APTR)-1L;
# endif
static size_t file_to_findlen = 0;
if (first == TRUE)
{
char_u save_char;
if (len == 0)
return NULL;
// copy file name into NameBuff, expanding environment variables
save_char = ptr[len];
ptr[len] = NUL;
file_to_findlen = expand_env_esc(ptr, NameBuff, MAXPATHL, FALSE, TRUE, NULL);
ptr[len] = save_char;
vim_free(*file_to_find);
*file_to_find = vim_strnsave(NameBuff, file_to_findlen);
if (*file_to_find == NULL) // out of memory
{
file_name = NULL;
file_to_findlen = 0;
goto theend;
}
if (options & FNAME_UNESC)
{
// Change all "\ " to " ".
for (ptr = *file_to_find; *ptr != NUL; ++ptr)
if (ptr[0] == '\\' && ptr[1] == ' ')
{
mch_memmove(ptr, ptr + 1,
(size_t)((*file_to_find + file_to_findlen) - (ptr + 1)) + 1);
--file_to_findlen;
}
}
}
rel_to_curdir = ((*file_to_find)[0] == '.'
&& ((*file_to_find)[1] == NUL
|| vim_ispathsep((*file_to_find)[1])
|| ((*file_to_find)[1] == '.'
&& ((*file_to_find)[2] == NUL
|| vim_ispathsep((*file_to_find)[2])))));
if (vim_isAbsName(*file_to_find)
// "..", "../path", "." and "./path": don't use the path_option
|| rel_to_curdir
# if defined(MSWIN)
// handle "\tmp" as absolute path
|| vim_ispathsep((*file_to_find)[0])
// handle "c:name" as absolute path
|| ((*file_to_find)[0] != NUL && (*file_to_find)[1] == ':')
# endif
# ifdef AMIGA
// handle ":tmp" as absolute path
|| (*file_to_find)[0] == ':'
# endif
)
{
/*
* Absolute path, no need to use "path_option".
* If this is not a first call, return NULL. We already returned a
* filename on the first call.
*/
if (first == TRUE)
{
int l;
int NameBufflen;
int run;
size_t rel_fnamelen = 0;
char_u *suffix;
if (path_with_url(*file_to_find))
{
file_name = vim_strnsave(*file_to_find, file_to_findlen);
goto theend;
}
if (rel_fname != NULL)
rel_fnamelen = STRLEN(rel_fname);
// When FNAME_REL flag given first use the directory of the file.
// Otherwise or when this fails use the current directory.
for (run = 1; run <= 2; ++run)
{
l = (int)file_to_findlen;
if (run == 1
&& rel_to_curdir
&& (options & FNAME_REL)
&& rel_fname != NULL
&& rel_fnamelen + l < MAXPATHL)
{
l = vim_snprintf(
(char *)NameBuff,
MAXPATHL,
"%.*s%s",
(int)(gettail(rel_fname) - rel_fname),
rel_fname,
*file_to_find);
}
else
{
STRCPY(NameBuff, *file_to_find);
run = 2;
}
// When the file doesn't exist, try adding parts of
// 'suffixesadd'.
NameBufflen = l;
suffix = suffixes;
for (;;)
{
if (mch_getperm(NameBuff) >= 0
&& (find_what == FINDFILE_BOTH
|| ((find_what == FINDFILE_DIR)
== mch_isdir(NameBuff))))
{
file_name = vim_strnsave(NameBuff, NameBufflen);
goto theend;
}
if (*suffix == NUL)
break;
NameBufflen = l + copy_option_part(&suffix, NameBuff + l,
MAXPATHL - l, ",");
}
}
}
}
else
{
/*
* Loop over all paths in the 'path' or 'cdpath' option.
* When "first" is set, first setup to the start of the option.
* Otherwise continue to find the next match.
*/
if (first == TRUE)
{
// vim_findfile_free_visited can handle a possible NULL pointer
vim_findfile_free_visited(*search_ctx);
dir = path_option;
did_findfile_init = FALSE;
}
for (;;)
{
if (did_findfile_init)
{
file_name = vim_findfile(*search_ctx);
if (file_name != NULL)
break;
did_findfile_init = FALSE;
}
else
{
char_u *buf;
char_u *r_ptr;
if (dir == NULL || *dir == NUL)
{
// We searched all paths of the option, now we can
// free the search context.
vim_findfile_cleanup(*search_ctx);
*search_ctx = NULL;
break;
}
if ((buf = alloc(MAXPATHL)) == NULL)
break;
// copy next path
buf[0] = NUL;
copy_option_part(&dir, buf, MAXPATHL, " ,");
// get the stopdir string
r_ptr = vim_findfile_stopdir(buf);
*search_ctx = vim_findfile_init(buf, *file_to_find, file_to_findlen,
r_ptr, 100, FALSE, find_what,
*search_ctx, FALSE, rel_fname);
if (*search_ctx != NULL)
did_findfile_init = TRUE;
vim_free(buf);
}
}
}
if (file_name == NULL && (options & FNAME_MESS))
{
if (first == TRUE)
{
if (find_what == FINDFILE_DIR)
semsg(_(e_cant_find_directory_str_in_cdpath), *file_to_find);
else
semsg(_(e_cant_find_file_str_in_path), *file_to_find);
}
else
{
if (find_what == FINDFILE_DIR)
semsg(_(e_no_more_directory_str_found_in_cdpath),
*file_to_find);
else
semsg(_(e_no_more_file_str_found_in_path), *file_to_find);
}
}
theend:
# ifdef AMIGA
proc->pr_WindowPtr = save_winptr;
# endif
return file_name;
}
/*
* Get the file name at the cursor.
* If Visual mode is active, use the selected text if it's in one line.
* Returns the name in allocated memory, NULL for failure.
*/
char_u *
grab_file_name(long count, linenr_T *file_lnum)
{
int options = FNAME_MESS|FNAME_EXP|FNAME_REL|FNAME_UNESC;
if (VIsual_active)
{
int len;
char_u *ptr;
if (get_visual_text(NULL, &ptr, &len) == FAIL)
return NULL;
// Only recognize ":123" here
if (file_lnum != NULL && ptr[len] == ':' && SAFE_isdigit(ptr[len + 1]))
{
char_u *p = ptr + len + 1;
*file_lnum = getdigits(&p);
}
return find_file_name_in_path(ptr, len, options,
count, curbuf->b_ffname);
}
return file_name_at_cursor(options | FNAME_HYP, count, file_lnum);
}
/*
* Return the file name under or after the cursor.
*
* The 'path' option is searched if the file name is not absolute.
* The string returned has been alloc'ed and should be freed by the caller.
* NULL is returned if the file name or file is not found.
*
* options:
* FNAME_MESS give error messages
* FNAME_EXP expand to path
* FNAME_HYP check for hypertext link
* FNAME_INCL apply "includeexpr"
*/
char_u *
file_name_at_cursor(int options, long count, linenr_T *file_lnum)
{
return file_name_in_line(ml_get_curline(),
curwin->w_cursor.col, options, count, curbuf->b_ffname,
file_lnum);
}
/*
* Return the name of the file under or after ptr[col].
* Otherwise like file_name_at_cursor().
*/
char_u *
file_name_in_line(
char_u *line,
int col,
int options,
long count,
char_u *rel_fname, // file we are searching relative to
linenr_T *file_lnum) // line number after the file name
{
char_u *ptr;
int len;
int in_type = TRUE;
int is_url = FALSE;
/*
* search forward for what could be the start of a file name
*/
ptr = line + col;
while (*ptr != NUL && !vim_isfilec(*ptr))
MB_PTR_ADV(ptr);
if (*ptr == NUL) // nothing found
{
if (options & FNAME_MESS)
emsg(_(e_no_file_name_under_cursor));
return NULL;
}
/*
* Search backward for first char of the file name.
* Go one char back to ":" before "//" even when ':' is not in 'isfname'.
*/
while (ptr > line)
{
if (has_mbyte && (len = (*mb_head_off)(line, ptr - 1)) > 0)
ptr -= len + 1;
else if (vim_isfilec(ptr[-1])
|| ((options & FNAME_HYP) && path_is_url(ptr - 1)))
--ptr;
else
break;
}
/*
* Search forward for the last char of the file name.
* Also allow "://" when ':' is not in 'isfname'.
*/
len = 0;
while (vim_isfilec(ptr[len]) || (ptr[len] == '\\' && ptr[len + 1] == ' ')
|| ((options & FNAME_HYP) && path_is_url(ptr + len))
|| (is_url && vim_strchr((char_u *)":?&=", ptr[len]) != NULL))
{
// After type:// we also include :, ?, & and = as valid characters, so
// that http://google.com:8080?q=this&that=ok works.
if ((ptr[len] >= 'A' && ptr[len] <= 'Z')
|| (ptr[len] >= 'a' && ptr[len] <= 'z'))
{
if (in_type && path_is_url(ptr + len + 1))
is_url = TRUE;
}
else
in_type = FALSE;
if (ptr[len] == '\\')
// Skip over the "\" in "\ ".
++len;
if (has_mbyte)
len += (*mb_ptr2len)(ptr + len);
else
++len;
}
/*
* If there is trailing punctuation, remove it.
* But don't remove "..", could be a directory name.
*/
if (len > 2 && vim_strchr((char_u *)".,:;!", ptr[len - 1]) != NULL
&& ptr[len - 2] != '.')
--len;
if (file_lnum != NULL)
{
char_u *p;
char *match_text = " line "; // english
size_t match_textlen = 6;
// Get the number after the file name and a separator character.
// Also accept " line 999" with and without the same translation as
// used in last_set_msg().
p = ptr + len;
if (STRNCMP(p, match_text, match_textlen) == 0)
p += match_textlen;
else
{
// no match with english, try localized
match_text = _(line_msg);
match_textlen = STRLEN(match_text);
if (STRNCMP(p, match_text, match_textlen) == 0)
p += match_textlen;
else
p = skipwhite(p);
}
if (*p != NUL)
{
if (!SAFE_isdigit(*p))
++p; // skip the separator
p = skipwhite(p);
if (SAFE_isdigit(*p))
*file_lnum = (int)getdigits(&p);
}
}
return find_file_name_in_path(ptr, len, options, count, rel_fname);
}
# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL)
static char_u *
eval_includeexpr(char_u *ptr, int len)
{
char_u *res;
sctx_T save_sctx = current_sctx;
set_vim_var_string(VV_FNAME, ptr, len);
current_sctx = curbuf->b_p_script_ctx[BV_INEX];
res = eval_to_string_safe(curbuf->b_p_inex,
was_set_insecurely((char_u *)"includeexpr", OPT_LOCAL),
TRUE, TRUE);
set_vim_var_string(VV_FNAME, NULL, 0);
current_sctx = save_sctx;
return res;
}
# endif
/*
* Return the name of the file ptr[len] in 'path'.
* Otherwise like file_name_at_cursor().
*/
char_u *
find_file_name_in_path(
char_u *ptr,
int len,
int options,
long count,
char_u *rel_fname) // file we are searching relative to
{
char_u *file_name;
int c;
# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL)
char_u *tofree = NULL;
# endif
if (len == 0)
return NULL;
# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL)
if ((options & FNAME_INCL) && *curbuf->b_p_inex != NUL)
{
tofree = eval_includeexpr(ptr, len);
if (tofree != NULL)
{
ptr = tofree;
len = (int)STRLEN(ptr);
}
}
# endif
if (options & FNAME_EXP)
{
char_u *file_to_find = NULL;
char *search_ctx = NULL;
file_name = find_file_in_path(ptr, len, options & ~FNAME_MESS,
TRUE, rel_fname, &file_to_find, &search_ctx);
# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL)
/*
* If the file could not be found in a normal way, try applying
* 'includeexpr' (unless done already).
*/
if (file_name == NULL
&& !(options & FNAME_INCL) && *curbuf->b_p_inex != NUL)
{
tofree = eval_includeexpr(ptr, len);
if (tofree != NULL)
{
ptr = tofree;
len = (int)STRLEN(ptr);
file_name = find_file_in_path(ptr, len, options & ~FNAME_MESS,
TRUE, rel_fname, &file_to_find, &search_ctx);
}
}
# endif
if (file_name == NULL && (options & FNAME_MESS))
{
c = ptr[len];
ptr[len] = NUL;
semsg(_(e_cant_find_file_str_in_path_2), ptr);
ptr[len] = c;
}
// Repeat finding the file "count" times. This matters when it
// appears several times in the path.
while (file_name != NULL && --count > 0)
{
vim_free(file_name);
file_name = find_file_in_path(ptr, len, options, FALSE, rel_fname,
&file_to_find, &search_ctx);
}
vim_free(file_to_find);
vim_findfile_cleanup(search_ctx);
}
else
file_name = vim_strnsave(ptr, len);
# if defined(FEAT_FIND_ID) && defined(FEAT_EVAL)
vim_free(tofree);
# endif
return file_name;
}
/*
* Return the end of the directory name, on the first path
* separator:
* "/path/file", "/path/dir/", "/path//dir", "/file"
* ^ ^ ^ ^
*/
static char_u *
gettail_dir(char_u *fname)
{
char_u *dir_end = fname;
char_u *next_dir_end = fname;
int look_for_sep = TRUE;
char_u *p;
for (p = fname; *p != NUL; )
{
if (vim_ispathsep(*p))
{
if (look_for_sep)
{
next_dir_end = p;
look_for_sep = FALSE;
}
}
else
{
if (!look_for_sep)
dir_end = next_dir_end;
look_for_sep = TRUE;
}
MB_PTR_ADV(p);
}
return dir_end;
}
/*
* return TRUE if 'c' is a path list separator.
*/
int
vim_ispathlistsep(int c)
{
# ifdef UNIX
return (c == ':');
# else
return (c == ';'); // might not be right for every system...
# endif
}
/*
* Moves "*psep" back to the previous path separator in "path".
* Returns FAIL is "*psep" ends up at the beginning of "path".
*/
static int
find_previous_pathsep(char_u *path, char_u **psep)
{
// skip the current separator
if (*psep > path && vim_ispathsep(**psep))
--*psep;
// find the previous separator
while (*psep > path)
{
if (vim_ispathsep(**psep))
return OK;
MB_PTR_BACK(path, *psep);
}
return FAIL;
}
/*
* Returns TRUE if "maybe_unique" is unique wrt other_paths in "gap".
* "maybe_unique" is the end portion of "((char_u **)gap->ga_data)[i]".
*/
static int
is_unique(char_u *maybe_unique, garray_T *gap, int i)
{
int j;
int candidate_len = (int)STRLEN(maybe_unique);
int other_path_len;
char_u **other_paths = (char_u **)gap->ga_data;
char_u *rival;
for (j = 0; j < gap->ga_len; j++)
{
if (j == i)
continue; // don't compare it with itself
other_path_len = (int)STRLEN(other_paths[j]);
if (other_path_len < candidate_len)
continue; // it's different when it's shorter
rival = other_paths[j] + other_path_len - candidate_len;
if (fnamecmp(maybe_unique, rival) == 0
&& (rival == other_paths[j] || vim_ispathsep(*(rival - 1))))
return FALSE; // match
}
return TRUE; // no match found
}
/*
* Split the 'path' option into an array of strings in garray_T. Relative
* paths are expanded to their equivalent fullpath. This includes the "."
* (relative to current buffer directory) and empty path (relative to current
* directory) notations.
*
* TODO: handle upward search (;) and path limiter (**N) notations by
* expanding each into their equivalent path(s).
*/
static void
expand_path_option(
char_u *curdir,
char_u *path_option, // p_path or p_cdpath
garray_T *gap)
{
char_u *buf;
size_t buflen;
char_u *p;
size_t curdirlen = 0;
if ((buf = alloc(MAXPATHL)) == NULL)
return;
while (*path_option != NUL)
{
buflen = copy_option_part(&path_option, buf, MAXPATHL, " ,");
if (buf[0] == '.' && (buf[1] == NUL || vim_ispathsep(buf[1])))
{
size_t plen;
// Relative to current buffer:
// "/path/file" + "." -> "/path/"
// "/path/file" + "./subdir" -> "/path/subdir"
if (curbuf->b_ffname == NULL)
continue;
p = gettail(curbuf->b_ffname);
plen = (size_t)(p - curbuf->b_ffname);
if (plen + buflen >= MAXPATHL)
continue;
if (buf[1] == NUL)
buf[plen] = NUL;
else
mch_memmove(buf + plen, buf + 2, (buflen - 2) + 1); // +1 for NUL
mch_memmove(buf, curbuf->b_ffname, plen);
buflen = simplify_filename(buf);
}
else if (buf[0] == NUL)
{
// relative to current directory
STRCPY(buf, curdir);
if (curdirlen == 0)
curdirlen = STRLEN(curdir);
buflen = curdirlen;
}
else if (path_with_url(buf))
// URL can't be used here
continue;
else if (!mch_isFullName(buf))
{
// Expand relative path to their full path equivalent
if (curdirlen == 0)
curdirlen = STRLEN(curdir);
if (curdirlen + buflen + 3 > MAXPATHL)
continue;
mch_memmove(buf + curdirlen + 1, buf, buflen + 1); // +1 for NUL
STRCPY(buf, curdir);
buf[curdirlen] = PATHSEP;
buflen = simplify_filename(buf);
}
if (ga_grow(gap, 1) == FAIL)
break;
# if defined(MSWIN)
// Avoid the path ending in a backslash, it fails when a comma is
// appended.
if (buf[buflen - 1] == '\\')
buf[buflen - 1] = '/';
# endif
p = vim_strnsave(buf, buflen);
if (p == NULL)
break;
((char_u **)gap->ga_data)[gap->ga_len++] = p;
}
vim_free(buf);
}
/*
* Returns a pointer to the file or directory name in "fname" that matches the
* longest path in "ga"p, or NULL if there is no match. For example:
*
* path: /foo/bar/baz
* fname: /foo/bar/baz/quux.txt
* returns: ^this
*/
static char_u *
get_path_cutoff(char_u *fname, garray_T *gap)
{
int i;
int maxlen = 0;
char_u **path_part = (char_u **)gap->ga_data;
char_u *cutoff = NULL;
for (i = 0; i < gap->ga_len; i++)
{
int j = 0;
while ((fname[j] == path_part[i][j]
# if defined(MSWIN)
|| (vim_ispathsep(fname[j]) && vim_ispathsep(path_part[i][j]))
# endif
) && fname[j] != NUL && path_part[i][j] != NUL)
j++;
if (j > maxlen)
{
maxlen = j;
cutoff = &fname[j];
}
}
// skip to the file or directory name
if (cutoff != NULL)
while (vim_ispathsep(*cutoff))
MB_PTR_ADV(cutoff);
return cutoff;
}
/*
* Sorts, removes duplicates and modifies all the fullpath names in "gap" so
* that they are unique with respect to each other while conserving the part
* that matches the pattern. Beware, this is at least O(n^2) wrt "gap->ga_len".
*/
void
uniquefy_paths(
garray_T *gap,
char_u *pattern,
char_u *path_option) // p_path or p_cdpath
{
int i;
int len;
char_u **fnames = (char_u **)gap->ga_data;
int sort_again = FALSE;
char_u *pat;
char_u *file_pattern;
char_u *curdir;
regmatch_T regmatch;
garray_T path_ga;
char_u **in_curdir = NULL;
char_u *short_name;
remove_duplicates(gap);
ga_init2(&path_ga, sizeof(char_u *), 1);
/*
* We need to prepend a '*' at the beginning of file_pattern so that the
* regex matches anywhere in the path. FIXME: is this valid for all
* possible patterns?
*/
len = (int)STRLEN(pattern);
file_pattern = alloc(len + 2);
if (file_pattern == NULL)
return;
file_pattern[0] = '*';
STRCPY(file_pattern + 1, pattern);
pat = file_pat_to_reg_pat(file_pattern, NULL, NULL, FALSE);
vim_free(file_pattern);
if (pat == NULL)
return;
regmatch.rm_ic = TRUE; // always ignore case
regmatch.regprog = vim_regcomp(pat, RE_MAGIC + RE_STRING);
vim_free(pat);
if (regmatch.regprog == NULL)
return;
if ((curdir = alloc(MAXPATHL)) == NULL)
goto theend;
mch_dirname(curdir, MAXPATHL);
expand_path_option(curdir, path_option, &path_ga);
in_curdir = ALLOC_CLEAR_MULT(char_u *, gap->ga_len);
if (in_curdir == NULL)
goto theend;
for (i = 0; i < gap->ga_len && !got_int; i++)
{
char_u *path = fnames[i];
int is_in_curdir;
char_u *dir_end = gettail_dir(path);
char_u *path_cutoff;
len = (int)STRLEN(path);
is_in_curdir = fnamencmp(curdir, path, dir_end - path) == 0
&& curdir[dir_end - path] == NUL;
if (is_in_curdir)
in_curdir[i] = vim_strnsave(path, len);
// Shorten the filename while maintaining its uniqueness
path_cutoff = get_path_cutoff(path, &path_ga);
// Don't assume all files can be reached without path when search
// pattern starts with star star slash, so only remove path_cutoff
// when possible.
if (pattern[0] == '*' && pattern[1] == '*'
&& vim_ispathsep_nocolon(pattern[2])
&& path_cutoff != NULL
&& vim_regexec(&regmatch, path_cutoff, (colnr_T)0)
&& is_unique(path_cutoff, gap, i))
{
sort_again = TRUE;
mch_memmove(path, path_cutoff, STRLEN(path_cutoff) + 1);
}
else
{
// Here all files can be reached without path, so get shortest
// unique path. We start at the end of the path.
char_u *pathsep_p = path + len - 1;
while (find_previous_pathsep(path, &pathsep_p))
{
if (vim_regexec(&regmatch, pathsep_p + 1, (colnr_T)0)
&& is_unique(pathsep_p + 1, gap, i)
&& path_cutoff != NULL && pathsep_p + 1 >= path_cutoff)
{
sort_again = TRUE;
mch_memmove(path, pathsep_p + 1,
(size_t)((path + len) - (pathsep_p + 1)) + 1); // +1 for NUL
break;
}
}
}
if (mch_isFullName(path))
{
/*
* Last resort: shorten relative to curdir if possible.
* 'possible' means:
* 1. It is under the current directory.
* 2. The result is actually shorter than the original.
*
* Before curdir After
* /foo/bar/file.txt /foo/bar ./file.txt
* c:\foo\bar\file.txt c:\foo\bar .\file.txt
* /file.txt / /file.txt
* c:\file.txt c:\ .\file.txt
*/
short_name = shorten_fname(path, curdir);
if (short_name != NULL && short_name > path + 1
# if defined(MSWIN)
// On windows,
// shorten_fname("c:\a\a.txt", "c:\a\b")
// returns "\a\a.txt", which is not really the short
// name, hence:
&& !vim_ispathsep(*short_name)
# endif
)
{
vim_snprintf((char *)path, MAXPATHL, ".%s%s", PATHSEPSTR, short_name);
}
}
ui_breakcheck();
}
// Shorten filenames in /in/current/directory/{filename}
for (i = 0; i < gap->ga_len && !got_int; i++)
{
size_t rel_pathsize;
char_u *rel_path;
char_u *path = in_curdir[i];
if (path == NULL)
continue;
// If the {filename} is not unique, change it to ./{filename}.
// Else reduce it to {filename}
short_name = shorten_fname(path, curdir);
if (short_name == NULL)
short_name = path;
if (is_unique(short_name, gap, i))
{
STRCPY(fnames[i], short_name);
continue;
}
rel_pathsize = 1 + STRLEN_LITERAL(PATHSEPSTR) + STRLEN(short_name) + 1;
rel_path = alloc(rel_pathsize);
if (rel_path == NULL)
goto theend;
vim_snprintf((char *)rel_path, rel_pathsize, ".%s%s", PATHSEPSTR, short_name);
vim_free(fnames[i]);
fnames[i] = rel_path;
sort_again = TRUE;
ui_breakcheck();
}
theend:
vim_free(curdir);
if (in_curdir != NULL)
{
for (i = 0; i < gap->ga_len; i++)
vim_free(in_curdir[i]);
vim_free(in_curdir);
}
ga_clear_strings(&path_ga);
vim_regfree(regmatch.regprog);
if (sort_again)
remove_duplicates(gap);
}
/*
* Calls globpath() with 'path' values for the given pattern and stores the
* result in "gap".
* Returns the total number of matches.
*/
int
expand_in_path(
garray_T *gap,
char_u *pattern,
int flags) // EW_* flags
{
char_u *curdir;
garray_T path_ga;
char_u *paths = NULL;
int glob_flags = 0;
char_u *path_option = *curbuf->b_p_path == NUL ? p_path : curbuf->b_p_path;
if ((curdir = alloc(MAXPATHL)) == NULL)
return 0;
mch_dirname(curdir, MAXPATHL);
ga_init2(&path_ga, sizeof(char_u *), 1);
if (flags & EW_CDPATH)
expand_path_option(curdir, p_cdpath, &path_ga);
else
expand_path_option(curdir, path_option, &path_ga);
vim_free(curdir);
if (path_ga.ga_len == 0)
return 0;
paths = ga_concat_strings(&path_ga, ",");
ga_clear_strings(&path_ga);
if (paths == NULL)
return 0;
if (flags & EW_ICASE)
glob_flags |= WILD_ICASE;
if (flags & EW_ADDSLASH)
glob_flags |= WILD_ADD_SLASH;
globpath(paths, pattern, gap, glob_flags, !!(flags & EW_CDPATH));
vim_free(paths);
return gap->ga_len;
}
/*
* Converts a file name into a canonical form. It simplifies a file name into
* its simplest form by stripping out unneeded components, if any. The
* resulting file name is simplified in place and will either be the same
* length as that supplied, or shorter.
*/
size_t
simplify_filename(char_u *filename)
{
#ifndef AMIGA // Amiga doesn't have "..", it uses "/"
int components = 0;
char_u *p, *tail, *start;
char_u *p_end; // point to NUL at end of string "p"
int stripping_disabled = FALSE;
int relative = TRUE;
p = filename;
# ifdef BACKSLASH_IN_FILENAME
if (p[0] != NUL && p[1] == ':') // skip "x:"
p += 2;
# endif
if (vim_ispathsep(*p))
{
relative = FALSE;
do
++p;
while (vim_ispathsep(*p));
}
start = p; // remember start after "c:/" or "/" or "///"
p_end = p + STRLEN(p);
#ifdef UNIX
// Posix says that "//path" is unchanged but "///path" is "/path".
if (start > filename + 2)
{
mch_memmove(filename + 1, p, (size_t)(p_end - p) + 1); // +1 for NUL
p_end -= (size_t)(p - (filename + 1));
start = p = filename + 1;
}
#endif
do
{
// At this point "p" is pointing to the char following a single "/"
// or "p" is at the "start" of the (absolute or relative) path name.
# ifdef VMS
// VMS allows device:[path] - don't strip the [ in directory
if ((*p == '[' || *p == '<') && p > filename && p[-1] == ':')
{
// :[ or :< composition: vms directory component
++components;
p = getnextcomp(p + 1);
}
// allow remote calls as host"user passwd"::device:[path]
else if (p[0] == ':' && p[1] == ':' && p > filename && p[-1] == '"' )
{
// ":: composition: vms host/passwd component
++components;
p = getnextcomp(p + 2);
}
else
# endif
if (vim_ispathsep(*p))
{
mch_memmove(p, p + 1, (size_t)(p_end - (p + 1)) + 1); // remove duplicate "/"
--p_end;
}
else if (p[0] == '.' && (vim_ispathsep(p[1]) || p[1] == NUL))
{
if (p == start && relative)
p += 1 + (p[1] != NUL); // keep single "." or leading "./"
else
{
// Strip "./" or ".///". If we are at the end of the file name
// and there is no trailing path separator, either strip "/." if
// we are after "start", or strip "." if we are at the beginning
// of an absolute path name .
tail = p + 1;
if (p[1] != NUL)
while (vim_ispathsep(*tail))
MB_PTR_ADV(tail);
else if (p > start)
--p; // strip preceding path separator
mch_memmove(p, tail, (size_t)(p_end - tail) + 1);
p_end -= (size_t)(tail - p);
}
}
else if (p[0] == '.' && p[1] == '.' &&
(vim_ispathsep(p[2]) || p[2] == NUL))
{
// Skip to after ".." or "../" or "..///".
tail = p + 2;
while (vim_ispathsep(*tail))
MB_PTR_ADV(tail);
if (components > 0) // strip one preceding component
{
int do_strip = FALSE;
char_u saved_char;
stat_T st;
// Don't strip for an erroneous file name.
if (!stripping_disabled)
{
// If the preceding component does not exist in the file
// system, we strip it. On Unix, we don't accept a symbolic
// link that refers to a non-existent file.
saved_char = p[-1];
p[-1] = NUL;
# ifdef UNIX
if (mch_lstat((char *)filename, &st) < 0)
# else
if (mch_stat((char *)filename, &st) < 0)
# endif
do_strip = TRUE;
p[-1] = saved_char;
--p;
// Skip back to after previous '/'.
while (p > start && !after_pathsep(start, p))
MB_PTR_BACK(start, p);
if (!do_strip)
{
// If the component exists in the file system, check
// that stripping it won't change the meaning of the
// file name. First get information about the
// unstripped file name. This may fail if the component
// to strip is not a searchable directory (but a regular
// file, for instance), since the trailing "/.." cannot
// be applied then. We don't strip it then since we
// don't want to replace an erroneous file name by
// a valid one, and we disable stripping of later
// components.
saved_char = *tail;
*tail = NUL;
if (mch_stat((char *)filename, &st) >= 0)
do_strip = TRUE;
else
stripping_disabled = TRUE;
*tail = saved_char;
# ifdef UNIX
if (do_strip)
{
stat_T new_st;
// On Unix, the check for the unstripped file name
// above works also for a symbolic link pointing to
// a searchable directory. But then the parent of
// the directory pointed to by the link must be the
// same as the stripped file name. (The latter
// exists in the file system since it is the
// component's parent directory.)
if (p == start && relative)
(void)mch_stat(".", &new_st);
else
{
saved_char = *p;
*p = NUL;
(void)mch_stat((char *)filename, &new_st);
*p = saved_char;
}
if (new_st.st_ino != st.st_ino ||
new_st.st_dev != st.st_dev)
{
do_strip = FALSE;
// We don't disable stripping of later
// components since the unstripped path name is
// still valid.
}
}
# endif
}
}
if (!do_strip)
{
// Skip the ".." or "../" and reset the counter for the
// components that might be stripped later on.
p = tail;
components = 0;
}
else
{
// Strip previous component. If the result would get empty
// and there is no trailing path separator, leave a single
// "." instead. If we are at the end of the file name and
// there is no trailing path separator and a preceding
// component is left after stripping, strip its trailing
// path separator as well.
if (p == start && relative && tail[-1] == '.')
{
*p++ = '.';
*p = NUL;
}
else
{
if (p > start && tail[-1] == '.')
--p;
mch_memmove(p, tail, (size_t)(p_end - tail) + 1); // strip previous component
p_end -= (size_t)(tail - p);
}
--components;
}
}
else if (p == start && !relative) // leading "/.." or "/../"
{
mch_memmove(p, tail, (size_t)(p_end - tail) + 1); // strip ".." or "../"
p_end -= (size_t)(tail - p);
}
else
{
if (p == start + 2 && p[-2] == '.') // leading "./../"
{
mch_memmove(p - 2, p, (size_t)(p_end - p) + 1); // strip leading "./"
p_end -= 2;
tail -= 2;
}
p = tail; // skip to char after ".." or "../"
}
}
else
{
++components; // simple path component
p = getnextcomp(p);
}
} while (*p != NUL);
#endif // !AMIGA
return (size_t)(p_end - filename);
}
#if defined(FEAT_EVAL) || defined(PROTO)
/*
* "simplify()" function
*/
void
f_simplify(typval_T *argvars, typval_T *rettv)
{
char_u *p;
if (in_vim9script() && check_for_string_arg(argvars, 0) == FAIL)
return;
p = tv_get_string_strict(&argvars[0]);
rettv->vval.v_string = vim_strsave(p);
simplify_filename(rettv->vval.v_string); // simplify in place
rettv->v_type = VAR_STRING;
}
#endif // FEAT_EVAL