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#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "Input.h"
#include "Exceptions.h"
#ifdef HAVE_CONFIG_H
#include "config.h"
#else
#define _(x) x
#endif
Input::Input(const String & no) throw (GeneralException) :
Handle(no.strlen() ? open(no.to_charp(), O_RDONLY) : dup(0)),
n(no) {
#ifdef DEBUG
fprintf(stderr, "Opening file %s, Input at %p\n", no.to_charp(), this);
#endif
if (GetHandle() < 0) {
throw IOGeneral(String(_("Error opening file ")) + no + _(" for reading: ") + strerror(errno));
}
struct stat s;
fstat(GetHandle(), &s);
date_modif = s.st_mtime;
if (S_ISREG(s.st_mode)) {
size = seek(0, SEEK_END);
seek(0, SEEK_SET);
}
}
Input::Input(const Input & i) : Handle(i), n(i.n), size(i.size), date_modif(i.date_modif) {
}
bool Input::CanWrite() {
return 0;
}
bool Input::CanRead() {
return 1;
}
bool Input::CanSeek() {
struct stat s;
fstat(GetHandle(), &s);
return S_ISREG(s.st_mode);
}
String Input::GetName() {
return n;
}
ssize_t Input::GetSize() {
return size;
}
time_t Input::GetModif() {
return date_modif;
}
off_t Input::seek(off_t offset, int whence) throw (GeneralException) {
if ((itell = lseek(GetHandle(), offset, whence)) < 0) {
throw IOGeneral(String(_("Error seeking file ")) + GetName() + _(": ") + strerror(errno));
}
#ifdef PARANOID_SEEK
if (itell != lseek(GetHandle(), 0, SEEK_CUR)) {
throw IOGeneral(String(_("Error seeking file ")) + GetName() + _(": the position does not match"));
}
#endif
return itell;
}
Stdin_t::Stdin_t() { }
bool Stdin_t::CanSeek() {
return 0;
}
String Stdin_t::GetName() {
return "Stdin";
}
Stdin_t Stdin;
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