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* function.c (IS_ABSOLUTE, ROOT_LEN): New macros.

Browse source 
(abspath): Support systems that define HAVE_DOS_PATHS (have
	drive letters in their file names).  Use IS_PATHSEP instead of a
	literal '/' comparison.
This commit is contained in:
Eli Zaretskii 2009-07-04 11:15:14 +00:00
parent 56f70324e8
commit 1471af2de2
2 changed files with 53 additions and 9 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2006-07-04 Eli Zaretskii <eliz@gnu.org>
* function.c (IS_ABSOLUTE, ROOT_LEN): New macros.
(abspath): Support systems that define HAVE_DOS_PATHS (have
drive letters in their file names). Use IS_PATHSEP instead of a
literal '/' comparison.
2009-06-14 Paul Smith <psmith@gnu.org>
* remake.c (update_file_1): Remember the original file we marked

55
function.c
View file

@ -1875,6 +1875,14 @@ func_not (char *o, char **argv, char *funcname)
#endif
#ifdef HAVE_DOS_PATHS
#define IS_ABSOLUTE(n) (n[0] && n[1] == ':')
#define ROOT_LEN 3
#else
#define IS_ABSOLUTE(n) (n[0] == '/')
#define ROOT_LEN 1
#endif
/* Return the absolute name of file NAME which does not contain any `.',
`..' components nor any repeated path separators ('/'). */
@ -1883,13 +1891,14 @@ abspath (const char *name, char *apath)
{
char *dest;
const char *start, *end, *apath_limit;
unsigned long root_len = ROOT_LEN;
if (name[0] == '\0' || apath == NULL)
return NULL;
apath_limit = apath + GET_PATH_MAX;
if (name[0] != '/')
if (!IS_ABSOLUTE(name))
{
/* It is unlikely we would make it until here but just to make sure. */
if (!starting_directory)
@ -1897,12 +1906,40 @@ abspath (const char *name, char *apath)
strcpy (apath, starting_directory);
#ifdef HAVE_DOS_PATHS
if (IS_PATHSEP(name[0]))
{
/* We have /foo, an absolute file name except for the drive
letter. Assume the missing drive letter is the current
drive, which we can get if we remove from starting_directory
everything past the root directory. */
apath[root_len] = '\0';
}
#endif
dest = strchr (apath, '\0');
}
else
{
apath[0] = '/';
dest = apath + 1;
strncpy (apath, name, root_len);
apath[root_len] = '\0';
dest = apath + root_len;
/* Get past the root, since we already copied it. */
name += root_len;
#ifdef HAVE_DOS_PATHS
if (!IS_PATHSEP(apath[2]))
{
/* Convert d:foo into d:./foo and increase root_len. */
apath[2] = '.';
apath[3] = '/';
dest++;
root_len++;
/* strncpy above copied one character too many. */
name--;
}
else
apath[2] = '/'; /* make sure it's a forward slash */
#endif
}
for (start = end = name; *start != '\0'; start = end)
@ -1910,11 +1947,11 @@ abspath (const char *name, char *apath)
unsigned long len;
/* Skip sequence of multiple path-separators. */
while (*start == '/')
while (IS_PATHSEP(*start))
++start;
/* Find end of path component. */
for (end = start; *end != '\0' && *end != '/'; ++end)
for (end = start; *end != '\0' && !IS_PATHSEP(*end); ++end)
;
len = end - start;
@ -1926,12 +1963,12 @@ abspath (const char *name, char *apath)
else if (len == 2 && start[0] == '.' && start[1] == '.')
{
/* Back up to previous component, ignore if at root already. */
if (dest > apath + 1)
while ((--dest)[-1] != '/');
if (dest > apath + root_len)
for (--dest; !IS_PATHSEP(dest[-1]); --dest);
}
else
{
if (dest[-1] != '/')
if (!IS_PATHSEP(dest[-1]))
*dest++ = '/';
if (dest + len >= apath_limit)
@ -1944,7 +1981,7 @@ abspath (const char *name, char *apath)
}
/* Unless it is root strip trailing separator. */
if (dest > apath + 1 && dest[-1] == '/')
if (dest > apath + root_len && IS_PATHSEP(dest[-1]))
--dest;
*dest = '\0';