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- Added some documenting comments to the source code.

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git-svn-id: file:///Users/olsen/Code/migration-svn-zu-git/logical-line-staging/clib2/trunk@15157 87f5fb63-7c3d-0410-a384-fd976d0f7a62
This commit is contained in:
Olaf Barthel
2006-10-02 07:15:37 +00:00
parent bf4d3b763c
commit 2b9d624d1d
2 changed files with 25 additions and 4 deletions
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14
library/libgen_basename.c
View File

@ -1,5 +1,5 @@
/* /*
* $Id: libgen_basename.c,v 1.7 2006-09-25 18:19:44 obarthel Exp $ * $Id: libgen_basename.c,v 1.8 2006-10-02 07:15:37 obarthel Exp $
* *
* :ts=4 * :ts=4
* *
@ -60,6 +60,7 @@ basename(const char *path)
else else
SHOWSTRING(path); SHOWSTRING(path);
/* An empty path always comes out as the "current directory". */
if(path == NULL || path[0] == '\0') if(path == NULL || path[0] == '\0')
{ {
str = "."; str = ".";
@ -67,15 +68,18 @@ basename(const char *path)
} }
else else
{ {
/* Strip all trailing slashes. */
len = strlen(path); len = strlen(path);
while(len > 0 && path[len-1] == '/') while(len > 0 && path[len-1] == '/')
len--; len--;
/* Is there anything left? */
if(len > 0) if(len > 0)
{ {
size_t i; size_t i;
/* Return what follows the last slash in the path. That's
usually a file or directory name. */
str = path; str = path;
for(i = len - 1 ; ; i--) for(i = len - 1 ; ; i--)
@ -93,6 +97,9 @@ basename(const char *path)
} }
} }
/* If the whole operation produced an empty string, then it
means that we dealt with a string which consisted entirely
of slashes. And that's what we will return. */
if(len == 0) if(len == 0)
{ {
str = "/"; str = "/";
@ -100,6 +107,9 @@ basename(const char *path)
} }
} }
/* Truncate the path name we can return. This function always returns
a valid pointer rather than NULL because some software expects it
to do so (I blame the specifications). */
if(len >= sizeof(new_path)) if(len >= sizeof(new_path))
len = sizeof(new_path)-1; len = sizeof(new_path)-1;

15
library/libgen_dirname.c
View File

@ -1,5 +1,5 @@
/* /*
* $Id: libgen_dirname.c,v 1.7 2006-09-25 18:19:44 obarthel Exp $ * $Id: libgen_dirname.c,v 1.8 2006-10-02 07:15:37 obarthel Exp $
* *
* :ts=4 * :ts=4
* *
@ -60,16 +60,18 @@ dirname(const char *path)
else else
SHOWSTRING(path); SHOWSTRING(path);
/* An empty path always comes out as the "current directory". */
str = "."; str = ".";
len = 1; len = 1;
if(path != NULL && path[0] != '\0') if(path != NULL && path[0] != '\0')
{ {
/* Strip all trailing slashes. */
len = strlen(path); len = strlen(path);
while(len > 1 && path[len-1] == '/') while(len > 1 && path[len-1] == '/')
len--; len--;
/* Is there anything left? */
if(len > 0) if(len > 0)
{ {
size_t i; size_t i;
@ -78,9 +80,15 @@ dirname(const char *path)
{ {
if(path[i] == '/') if(path[i] == '/')
{ {
/* Return everything up to, but not including
the last slash in the path. That's usually
the directory name. */
str = path; str = path;
len = i; len = i;
/* If that produces an empty string, it means
that the entire string consists of slash
characters. We'll return only the first. */
if(i == 0) if(i == 0)
len++; len++;
@ -93,6 +101,9 @@ dirname(const char *path)
} }
} }
/* Truncate the path name we can return. This function always returns
a valid pointer rather than NULL because some software expects it
to do so (I blame the specifications). */
if(len >= sizeof(new_path)) if(len >= sizeof(new_path))
len = sizeof(new_path)-1; len = sizeof(new_path)-1;