os/persistentdata/persistentstorage/sqlite3api/TEST/TCL/tcldistribution/compat/opendir.c
1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/persistentdata/persistentstorage/sqlite3api/TEST/TCL/tcldistribution/compat/opendir.c Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,108 @@
1.4 +/*
1.5 + * opendir.c --
1.6 + *
1.7 + * This file provides dirent-style directory-reading procedures
1.8 + * for V7 Unix systems that don't have such procedures. The
1.9 + * origin of this code is unclear, but it seems to have come
1.10 + * originally from Larry Wall.
1.11 + *
1.12 + *
1.13 + * RCS: @(#) $Id: opendir.c,v 1.2 1998/09/14 18:39:44 stanton Exp $
1.14 + */
1.15 +
1.16 +#include "tclInt.h"
1.17 +#include "tclPort.h"
1.18 +
1.19 +#undef DIRSIZ
1.20 +#define DIRSIZ(dp) \
1.21 + ((sizeof (struct dirent) - (MAXNAMLEN+1)) + (((dp)->d_namlen+1 + 3) &~ 3))
1.22 +
1.23 +/*
1.24 + * open a directory.
1.25 + */
1.26 +DIR *
1.27 +opendir(name)
1.28 +char *name;
1.29 +{
1.30 + register DIR *dirp;
1.31 + register int fd;
1.32 + char *myname;
1.33 +
1.34 + myname = ((*name == '\0') ? "." : name);
1.35 + if ((fd = open(myname, 0, 0)) == -1)
1.36 + return NULL;
1.37 + if ((dirp = (DIR *)ckalloc(sizeof(DIR))) == NULL) {
1.38 + close (fd);
1.39 + return NULL;
1.40 + }
1.41 + dirp->dd_fd = fd;
1.42 + dirp->dd_loc = 0;
1.43 + return dirp;
1.44 +}
1.45 +
1.46 +/*
1.47 + * read an old style directory entry and present it as a new one
1.48 + */
1.49 +#ifndef pyr
1.50 +#define ODIRSIZ 14
1.51 +
1.52 +struct olddirect {
1.53 + ino_t od_ino;
1.54 + char od_name[ODIRSIZ];
1.55 +};
1.56 +#else /* a Pyramid in the ATT universe */
1.57 +#define ODIRSIZ 248
1.58 +
1.59 +struct olddirect {
1.60 + long od_ino;
1.61 + short od_fill1, od_fill2;
1.62 + char od_name[ODIRSIZ];
1.63 +};
1.64 +#endif
1.65 +
1.66 +/*
1.67 + * get next entry in a directory.
1.68 + */
1.69 +struct dirent *
1.70 +readdir(dirp)
1.71 +register DIR *dirp;
1.72 +{
1.73 + register struct olddirect *dp;
1.74 + static struct dirent dir;
1.75 +
1.76 + for (;;) {
1.77 + if (dirp->dd_loc == 0) {
1.78 + dirp->dd_size = read(dirp->dd_fd, dirp->dd_buf,
1.79 + DIRBLKSIZ);
1.80 + if (dirp->dd_size <= 0)
1.81 + return NULL;
1.82 + }
1.83 + if (dirp->dd_loc >= dirp->dd_size) {
1.84 + dirp->dd_loc = 0;
1.85 + continue;
1.86 + }
1.87 + dp = (struct olddirect *)(dirp->dd_buf + dirp->dd_loc);
1.88 + dirp->dd_loc += sizeof(struct olddirect);
1.89 + if (dp->od_ino == 0)
1.90 + continue;
1.91 + dir.d_ino = dp->od_ino;
1.92 + strncpy(dir.d_name, dp->od_name, ODIRSIZ);
1.93 + dir.d_name[ODIRSIZ] = '\0'; /* insure null termination */
1.94 + dir.d_namlen = strlen(dir.d_name);
1.95 + dir.d_reclen = DIRSIZ(&dir);
1.96 + return (&dir);
1.97 + }
1.98 +}
1.99 +
1.100 +/*
1.101 + * close a directory.
1.102 + */
1.103 +void
1.104 +closedir(dirp)
1.105 +register DIR *dirp;
1.106 +{
1.107 + close(dirp->dd_fd);
1.108 + dirp->dd_fd = -1;
1.109 + dirp->dd_loc = 0;
1.110 + ckfree((char *) dirp);
1.111 +}