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// SPDX-License-Identifier: GPL-2.0-or-later
/** @file
* TODO: insert short description here
*//*
* Authors: see git history
*
* Copyright (C) 2018 Authors
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
/**
* @file
* Utility functions for filenames.
*/
#include <cerrno>
#include <string>
#include <cstring>
#include <glib.h>
#include "dir-util.h"
std::string sp_relative_path_from_path( std::string const &path, std::string const &base)
{
std::string result;
if ( !base.empty() && !path.empty() ) {
size_t base_len = base.length();
while (base_len != 0
&& (base[base_len - 1] == G_DIR_SEPARATOR))
{
--base_len;
}
if ( (path.substr(0, base_len) == base.substr(0, base_len))
&& (path[base_len] == G_DIR_SEPARATOR))
{
size_t retPos = base_len + 1;
while ( (retPos < path.length()) && (path[retPos] == G_DIR_SEPARATOR) ) {
retPos++;
}
if ( (retPos + 1) < path.length() ) {
result = path.substr(retPos);
}
}
}
if ( result.empty() ) {
result = path;
}
return result;
}
char const *sp_extension_from_path(char const *const path)
{
if (path == nullptr) {
return nullptr;
}
char const *p = path;
while (*p != '\0') p++;
while ((p >= path) && (*p != G_DIR_SEPARATOR) && (*p != '.')) p--;
if (* p != '.') return nullptr;
p++;
return p;
}
/* current == "./", parent == "../" */
static char const dots[] = {'.', '.', G_DIR_SEPARATOR, '\0'};
static char const *const parent = dots;
static char const *const current = dots + 1;
char *inkscape_rel2abs(const char *path, const char *base, char *result, const size_t size)
{
const char *pp, *bp;
/* endp points the last position which is safe in the result buffer. */
const char *endp = result + size - 1;
char *rp;
int length;
if (*path == G_DIR_SEPARATOR)
{
if (strlen (path) >= size)
goto erange;
strcpy (result, path);
goto finish;
}
else if (*base != G_DIR_SEPARATOR || !size)
{
errno = EINVAL;
return (nullptr);
}
else if (size == 1)
goto erange;
if (!strcmp (path, ".") || !strcmp (path, current))
{
if (strlen (base) >= size)
goto erange;
strcpy (result, base);
/* rp points the last char. */
rp = result + strlen (base) - 1;
if (*rp == G_DIR_SEPARATOR)
*rp = 0;
else
rp++;
/* rp point NULL char */
if (*++path == G_DIR_SEPARATOR)
{
/* Append G_DIR_SEPARATOR to the tail of path name. */
*rp++ = G_DIR_SEPARATOR;
if (rp > endp)
goto erange;
*rp = 0;
}
goto finish;
}
bp = base + strlen (base);
if (*(bp - 1) == G_DIR_SEPARATOR)
--bp;
/* up to root. */
for (pp = path; *pp && *pp == '.';)
{
if (!strncmp (pp, parent, 3))
{
pp += 3;
while (bp > base && *--bp != G_DIR_SEPARATOR)
;
}
else if (!strncmp (pp, current, 2))
{
pp += 2;
}
else if (!strncmp (pp, "..\0", 3))
{
pp += 2;
while (bp > base && *--bp != G_DIR_SEPARATOR)
;
}
else
break;
}
/* down to leaf. */
length = bp - base;
if (length >= static_cast<int>(size))
goto erange;
strncpy (result, base, length);
rp = result + length;
if (*pp || *(pp - 1) == G_DIR_SEPARATOR || length == 0)
*rp++ = G_DIR_SEPARATOR;
if (rp + strlen (pp) > endp)
goto erange;
strcpy (rp, pp);
finish:
return result;
erange:
errno = ERANGE;
return (nullptr);
}
char *inkscape_abs2rel(const char *path, const char *base, char *result, const size_t size)
{
const char *pp, *bp, *branch;
// endp points the last position which is safe in the result buffer.
const char *endp = result + size - 1;
char *rp;
if (*path != G_DIR_SEPARATOR)
{
if (strlen (path) >= size)
goto erange;
strcpy (result, path);
goto finish;
}
else if (*base != G_DIR_SEPARATOR || !size)
{
errno = EINVAL;
return (nullptr);
}
else if (size == 1)
goto erange;
/* seek to branched point. */
branch = path;
for (pp = path, bp = base; *pp && *bp && *pp == *bp; pp++, bp++)
if (*pp == G_DIR_SEPARATOR)
branch = pp;
if (((*pp == 0) || ((*pp == G_DIR_SEPARATOR) && (*(pp + 1) == 0))) &&
((*bp == 0) || ((*bp == G_DIR_SEPARATOR) && (*(bp + 1) == 0))))
{
rp = result;
*rp++ = '.';
if (*pp == G_DIR_SEPARATOR || *(pp - 1) == G_DIR_SEPARATOR)
*rp++ = G_DIR_SEPARATOR;
if (rp > endp)
goto erange;
*rp = 0;
goto finish;
}
if (((*pp == 0) && (*bp == G_DIR_SEPARATOR)) || ((*pp == G_DIR_SEPARATOR) && (*bp == 0)))
branch = pp;
/* up to root. */
rp = result;
for (bp = base + (branch - path); *bp; bp++)
if (*bp == G_DIR_SEPARATOR && *(bp + 1) != 0)
{
if (rp + 3 > endp)
goto erange;
*rp++ = '.';
*rp++ = '.';
*rp++ = G_DIR_SEPARATOR;
}
if (rp > endp)
goto erange;
*rp = 0;
/* down to leaf. */
if (*branch)
{
if (rp + strlen (branch + 1) > endp)
goto erange;
strcpy (rp, branch + 1);
}
else
*--rp = 0;
finish:
return result;
erange:
errno = ERANGE;
return (nullptr);
}
char *prepend_current_dir_if_relative(gchar const *uri)
{
if (!uri) {
return nullptr;
}
gchar *full_path = (gchar *) g_malloc (1001);
gchar *cwd = g_get_current_dir();
gsize bytesRead = 0;
gsize bytesWritten = 0;
GError* error = nullptr;
gchar* cwd_utf8 = g_filename_to_utf8 ( cwd,
-1,
&bytesRead,
&bytesWritten,
&error);
inkscape_rel2abs (uri, cwd_utf8, full_path, 1000);
gchar *ret = g_strdup (full_path);
g_free(cwd_utf8);
g_free (full_path);
g_free (cwd);
return ret;
}
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vi: set autoindent shiftwidth=4 tabstop=8 filetype=cpp expandtab softtabstop=4 fileencoding=utf-8 textwidth=99 :
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