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-rw-r--r--MSVC/readline/dirent.c357
1 files changed, 357 insertions, 0 deletions
diff --git a/MSVC/readline/dirent.c b/MSVC/readline/dirent.c
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index 0000000..435b597
--- /dev/null
+++ b/MSVC/readline/dirent.c
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+/*
+ * dirent.c
+ *
+ * Derived from DIRLIB.C by Matt J. Weinstein
+ * This note appears in the DIRLIB.H
+ * DIRLIB.H by M. J. Weinstein Released to public domain 1-Jan-89
+ *
+ * Updated by Jeremy Bettis <jeremy@hksys.com>
+ * Significantly revised and rewinddir, seekdir and telldir added by Colin
+ * Peters <colin@fu.is.saga-u.ac.jp>
+ *
+ * $Revision: 1.1 $
+ * $Author: pixel $
+ * $Date: 2004-04-28 14:23:36 $
+ *
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <io.h>
+#include <direct.h>
+#include <sys/stat.h>
+
+#include "dirent.h"
+
+#define SUFFIX "*"
+#define SLASH "\\"
+
+char * __stdcall CharPrevA(const char *, const char *);
+
+static int
+isUNCRoot(const char *path)
+{
+ if (path[0] == '\\' && path[1] == '\\') {
+ const char *p;
+ if (p = strchr(path + 3, '\\')) {
+ if (!p[1])
+ return 0;
+ if (p = strchr(p + 1, '\\')) {
+ if (!p[1])
+ return 1;
+ } else
+ return 1;
+ }
+ }
+ return 0;
+}
+
+#ifndef S_ISDIR
+#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
+#endif
+/*
+ * opendir
+ *
+ * Returns a pointer to a DIR structure appropriately filled in to begin
+ * searching a directory.
+ */
+DIR *
+opendir (const char *szPath)
+{
+ DIR *nd;
+ struct _stat statDir;
+ char buf1[_MAX_PATH];
+ char buf2[_MAX_PATH];
+ const char *p;
+ char *q;
+ int len;
+
+ errno = 0;
+
+ if (!szPath)
+ {
+ errno = EFAULT;
+ return (DIR *) 0;
+ }
+
+ if (szPath[0] == '\0')
+ {
+ errno = ENOTDIR;
+ return (DIR *) 0;
+ }
+
+ for (p = szPath, q = buf1; *p; p++, q++)
+ {
+ if (*p == '/')
+ *q = '\\';
+ else
+ *q = *p;
+ }
+ *q = '\0';
+
+ _fullpath(buf2, buf1, sizeof buf2);
+ len = strlen(buf2);
+ p = CharPrevA(buf2, buf2 + len);
+ if (isUNCRoot(buf2)) {
+ if (*p != '\\')
+ strcat(buf2, "\\");
+ } else if (*p == '\\' || *p == ':')
+ strcat(buf2, ".");
+
+ /* Attempt to determine if the given path really is a directory. */
+ if (_stat (buf2, &statDir))
+ {
+ /* Error, stat should have set an error value. */
+ return (DIR *) 0;
+ }
+
+ if (!S_ISDIR (statDir.st_mode))
+ {
+ /* Error, stat reports not a directory. */
+ errno = ENOTDIR;
+ return (DIR *) 0;
+ }
+
+ if (*p == '\\')
+ buf2[len - 1] = '\0';
+
+ /* Allocate enough space to store DIR structure and the complete
+ * directory path given. */
+ nd = (DIR *) malloc (sizeof (DIR) + strlen (buf2) + strlen (SLASH) +
+ strlen (SUFFIX));
+
+ if (!nd)
+ {
+ /* Error, out of memory. */
+ errno = ENOMEM;
+ return (DIR *) 0;
+ }
+
+ /* Create the search expression. */
+ strcpy (nd->dd_name, buf2);
+
+ /* Add on a slash. */
+ strcat (nd->dd_name, SLASH);
+
+ /* Add on the search pattern */
+ strcat (nd->dd_name, SUFFIX);
+
+ /* Initialize handle to -1 so that a premature closedir doesn't try
+ * to call _findclose on it. */
+ nd->dd_handle = -1;
+
+ /* Initialize the status. */
+ nd->dd_stat = 0;
+
+ /* Initialize the dirent structure. ino and reclen are invalid under
+ * Win32, and name simply points at the appropriate part of the
+ * findfirst_t structure. */
+ nd->dd_dir.d_ino = 0;
+ nd->dd_dir.d_reclen = 0;
+ nd->dd_dir.d_namlen = 0;
+ nd->dd_dir.d_name = nd->dd_dta.name;
+
+ return nd;
+}
+
+
+/*
+ * readdir
+ *
+ * Return a pointer to a dirent structure filled with the information on the
+ * next entry in the directory.
+ */
+struct dirent *
+readdir (DIR * dirp)
+{
+ errno = 0;
+
+ /* Check for valid DIR struct. */
+ if (!dirp)
+ {
+ errno = EFAULT;
+ return (struct dirent *) 0;
+ }
+
+ if (dirp->dd_dir.d_name != dirp->dd_dta.name)
+ {
+ /* The structure does not seem to be set up correctly. */
+ errno = EINVAL;
+ return (struct dirent *) 0;
+ }
+
+ if (dirp->dd_stat < 0)
+ {
+ /* We have already returned all files in the directory
+ * (or the structure has an invalid dd_stat). */
+ return (struct dirent *) 0;
+ }
+ else if (dirp->dd_stat == 0)
+ {
+ /* We haven't started the search yet. */
+ /* Start the search */
+ dirp->dd_handle = _findfirst (dirp->dd_name, &(dirp->dd_dta));
+
+ if (dirp->dd_handle == -1)
+ {
+ /* Whoops! Seems there are no files in that
+ * directory. */
+ dirp->dd_stat = -1;
+ }
+ else
+ {
+ dirp->dd_stat = 1;
+ }
+ }
+ else
+ {
+ /* Get the next search entry. */
+ if (_findnext (dirp->dd_handle, &(dirp->dd_dta)))
+ {
+ /* We are off the end or otherwise error. */
+ _findclose (dirp->dd_handle);
+ dirp->dd_handle = -1;
+ dirp->dd_stat = -1;
+ }
+ else
+ {
+ /* Update the status to indicate the correct
+ * number. */
+ dirp->dd_stat++;
+ }
+ }
+
+ if (dirp->dd_stat > 0)
+ {
+ /* Successfully got an entry. Everything about the file is
+ * already appropriately filled in except the length of the
+ * file name. */
+ dirp->dd_dir.d_namlen = strlen (dirp->dd_dir.d_name);
+ return &dirp->dd_dir;
+ }
+
+ return (struct dirent *) 0;
+}
+
+
+/*
+ * closedir
+ *
+ * Frees up resources allocated by opendir.
+ */
+int
+closedir (DIR * dirp)
+{
+ int rc;
+
+ errno = 0;
+ rc = 0;
+
+ if (!dirp)
+ {
+ errno = EFAULT;
+ return -1;
+ }
+
+ if (dirp->dd_handle != -1)
+ {
+ rc = _findclose (dirp->dd_handle);
+ }
+
+ /* Delete the dir structure. */
+ free (dirp);
+
+ return rc;
+}
+
+/*
+ * rewinddir
+ *
+ * Return to the beginning of the directory "stream". We simply call findclose
+ * and then reset things like an opendir.
+ */
+void
+rewinddir (DIR * dirp)
+{
+ errno = 0;
+
+ if (!dirp)
+ {
+ errno = EFAULT;
+ return;
+ }
+
+ if (dirp->dd_handle != -1)
+ {
+ _findclose (dirp->dd_handle);
+ }
+
+ dirp->dd_handle = -1;
+ dirp->dd_stat = 0;
+}
+
+/*
+ * telldir
+ *
+ * Returns the "position" in the "directory stream" which can be used with
+ * seekdir to go back to an old entry. We simply return the value in stat.
+ */
+long
+telldir (DIR * dirp)
+{
+ errno = 0;
+
+ if (!dirp)
+ {
+ errno = EFAULT;
+ return -1;
+ }
+ return dirp->dd_stat;
+}
+
+/*
+ * seekdir
+ *
+ * Seek to an entry previously returned by telldir. We rewind the directory
+ * and call readdir repeatedly until either dd_stat is the position number
+ * or -1 (off the end). This is not perfect, in that the directory may
+ * have changed while we weren't looking. But that is probably the case with
+ * any such system.
+ */
+void
+seekdir (DIR * dirp, long lPos)
+{
+ errno = 0;
+
+ if (!dirp)
+ {
+ errno = EFAULT;
+ return;
+ }
+
+ if (lPos < -1)
+ {
+ /* Seeking to an invalid position. */
+ errno = EINVAL;
+ return;
+ }
+ else if (lPos == -1)
+ {
+ /* Seek past end. */
+ if (dirp->dd_handle != -1)
+ {
+ _findclose (dirp->dd_handle);
+ }
+ dirp->dd_handle = -1;
+ dirp->dd_stat = -1;
+ }
+ else
+ {
+ /* Rewind and read forward to the appropriate index. */
+ rewinddir (dirp);
+
+ while ((dirp->dd_stat < lPos) && readdir (dirp))
+ ;
+ }
+}
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