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file.pmc
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file.pmc
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/*
Copyright (C) 2001-2006, The Perl Foundation.
$Id$
=head1 NAME
src/pmc/file.pmc - File PMC
=head1 DESCRIPTION
C<File> is a singleton class which provides access to File functions.
=head2 Methods
=over 4
=cut
*/
#ifdef WIN32
# include <direct.h>
#endif
#include "parrot/parrot.h"
/* XXX Check if we need to deallocate strerror strings */
/* XXX apparently, strerror_r is thread-safe and should be used instead.*/
static PMC *File_PMC;
pmclass File singleton {
/*
=item C<void *get_pointer()>
=item C<void set_pointer(void *ptr)>
These two functions are part of the singleton creation interface. For more
information see F<src/pmc.c>.
=cut
*/
void *get_pointer() {
return File_PMC;
}
void set_pointer(void *ptr) {
File_PMC = (PMC*) ptr;
}
/*
=item C<INTVAL exists(STRING *file)>
Returns a true value (1) if the supplied file or directory exists.
=cut
*/
METHOD INTVAL exists(STRING *path) {
struct stat info;
char *cpath = string_to_cstring(interp, path);
#ifdef WIN32
int error = stat(cpath, &info);
#else
int error = lstat(cpath, &info);
#endif
string_cstring_free(cpath);
if (error) {
return 0;
}
return 1;
}
/*
=item C<INTVAL is_dir(STRING *path)>
Returns a true value (1) if the supplied path is a directory.
=cut
*/
METHOD INTVAL is_dir(STRING *path) {
struct stat info;
char *cpath = string_to_cstring(interp, path);
#ifdef WIN32
int error = stat(cpath, &info);
#else
int error = lstat(cpath, &info);
#endif
string_cstring_free(cpath);
if (error) {
char *errmsg = strerror(errno);
real_exception(interp, NULL, E_SystemError, errmsg);
}
if (S_ISDIR(info.st_mode)) {
return 1;
}
else {
return 0;
}
}
/*
=item C<INTVAL is_file(STRING *path)>
Returns a true value (1) if the supplied path is a plain file.
=cut
*/
METHOD INTVAL is_file(STRING *path) {
struct stat info;
char *cpath = string_to_cstring(interp, path);
#ifdef WIN32
int error = stat(cpath, &info);
#else
int error = lstat(cpath, &info);
#endif
string_cstring_free(cpath);
if (error) {
char *errmsg = strerror(errno);
real_exception(interp, NULL, E_SystemError, errmsg);
}
if (S_ISREG(info.st_mode)) {
return 1;
}
else {
return 0;
}
}
/*
=item C<INTVAL is_link(STRING *path)>
Returns a true value (1) if the supplied path is a link.
=cut
*/
METHOD INTVAL is_link(STRING *path) {
#ifdef WIN32
/* I love win32 implementations */
return 0;
#else
struct stat info;
char *cpath = string_to_cstring(interp, path);
int error = lstat(cpath, &info);
string_cstring_free(cpath);
if (error) {
char *errmsg = strerror(errno);
real_exception(interp, NULL, E_SystemError, errmsg);
}
if (S_ISLNK(info.st_mode)) {
return 1;
}
else {
return 0;
}
#endif
}
/*
=item C<void copy(STRING *from, STRING *to)>
Copy the contents from file represented by path C<from> to the path
C<to>.
Uses the "work everywhere method". It is good enough to start with.
NOTE: I'm sure that there should be more efficient ways to do this. Be
free to change or give me hints on how to change it. -- ambs
=cut
*/
METHOD void copy(STRING *from, STRING *to) {
#define CHUNK_SIZE 1024
FILE *source = NULL;
FILE *target = NULL;
char *cfrom = string_to_cstring(interp, from);
char *cto = string_to_cstring(interp, to);
source = fopen(cfrom, "rb");
if (source) {
target = fopen(cto, "w+b");
if (target) {
char buf[CHUNK_SIZE];
int bytes_read, bytes_written;
while (!feof(source)) {
bytes_read = fread(buf, 1, CHUNK_SIZE, source);
if (bytes_read) {
bytes_written = fwrite(buf, 1, bytes_read, target);
if (bytes_read != bytes_written) {
real_exception(interp, NULL, E_SystemError,
"Error writting file");
break;
}
}
}
fclose(target);
}
else {
char *errmsg = strerror(errno);
real_exception(interp, NULL, E_SystemError, errmsg);
}
fclose(source);
}
else {
char *errmsg = strerror(errno);
real_exception(interp, NULL, E_SystemError, errmsg);
}
string_cstring_free(cfrom);
string_cstring_free(cto);
#undef CHUNK_SIZE
}
/*
=item C<void rename(STRING *from, STRING *to)>
Rename a file C<from> to the path C<to>.
=cut
*/
METHOD void rename(STRING *from, STRING *to) {
char *cfrom = string_to_cstring(interp, from);
char *cto = string_to_cstring(interp, to);
int error = rename(cfrom, cto);
string_cstring_free(cfrom);
string_cstring_free(cto);
if (error) {
char *errmsg = strerror(errno);
real_exception(interp, NULL, E_SystemError, errmsg);
}
}
}
/*
=back
=head1 SEE ALS0
stat(2), rename(2)
=cut
*/
/*
* Local variables:
* c-file-style: "parrot"
* End:
* vim: expandtab shiftwidth=4:
*/