diogo/yap-6.3
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This commit is contained in:
Vitor Santos Costa
2017-11-21 15:44:43 +00:00
parent 484213efb6
commit 06485f071a
31 changed files with 357 additions and 632 deletions
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27
include/VFS.h
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@@ -33,6 +33,7 @@
#include <encoding.h>
typedef struct {
dev_t st_dev; /* ID of device containing file */
mode_t st_mode; /* Mode of file (see below) */
@@ -77,10 +78,9 @@ typedef struct vfs {
/// a way to identify a file in this VFS: two special cases, prefix and suffix
const char *prefix;
const char *suffix;
bool (*id)(struct vfs *me, const char *s);
bool (*chDir)(struct vfs *me, const char *s);
/** operations */
void *(*open)(const char *s,
const char *io_mode); /// open an object
void *(*open)(int sno, const char *fname, const char *io_mode); /// open an object
/// in this space, usual w,r,a,b flags plus B (store in a buffer)
bool (*close)(int sno); /// close the object
int (*get_char)(int sno); /// get an octet to the stream
@@ -88,15 +88,15 @@ typedef struct vfs {
void (*flush)(int sno); /// flush a stream
int64_t (*seek)(int sno, int64_t offset,
int whence); /// jump around the stream
void *(*opendir)(const char *s); /// open a directory object, if one exists
void *(*opendir)(struct vfs *,const char *s); /// open a directory object, if one exists
const char *(*nextdir)(void *d); /// walk to the next entry in a directory object
void (*closedir)(void *d);
bool (*closedir)(void *d);
; /// close access a directory object
bool (*stat)(const char *s,
vfs_stat *); /// obtain size, age, permissions of a file.
bool (*isdir)(const char *s); /// verify whether is directory.
bool (*exists)(const char *s); /// verify whether a file exists.
bool (*chdir)(const char *s); /// set working directory (may be virtual).
bool (*isdir)(struct vfs *,const char *s); /// verify whether is directory.
bool (*exists)(struct vfs *, const char *s); /// verify whether a file exists.
bool (*chdir)(struct vfs *,const char *s); /// set working directory (may be virtual).
encoding_t enc; /// default file encoded.
YAP_Term (*parsers)(int sno); // a set of parsers that can read the
// stream and generate a YAP_Term
@@ -121,12 +121,15 @@ static inline VFS_t *vfs_owner(const char *fname) {
size_t sz0 = strlen(fname), sz;
while (me) {
if ((me->vflags & VFS_HAS_PREFIX) && strstr(fname, me->prefix) == fname)
bool p = true;
if ((me->vflags & VFS_HAS_PREFIX) && p) {
const char *r = fname, *s = me->prefix;
while (*s && p) p = *s++ == *r++;
if (p && r > fname+1)
return me;
}
if (me->vflags & VFS_HAS_SUFFIX && (sz = strlen(me->suffix)) && (d = (sz0 - sz)) >= 0 &&
strcmp(fname + d, me->suffix) == 0)
return me;
if (me->vflags & VFS_HAS_FUNCTION && (me->id(me, fname))) {
strcmp(fname + d, me->suffix) == 0) {
return me;
}
me = me->next;