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/*
* base code for various Tcl extensions
* Copyright 2006-2012 Ian Jackson
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "chiark-tcl-base.h"
int cht_staticerr(Tcl_Interp *ip, const char *m, const char *ec) {
Tcl_SetResult(ip, (char*)m, TCL_STATIC);
if (ec) Tcl_SetObjErrorCode(ip, Tcl_NewStringObj(ec,-1));
return TCL_ERROR;
}
int cht_posixerr(Tcl_Interp *ip, int errnoval, const char *m) {
const char *em;
Tcl_ResetResult(ip);
errno= errnoval;
em= Tcl_PosixError(ip);
Tcl_AppendResult(ip, m, ": ", em, (char*)0);
return TCL_ERROR;
}
int cht_newfdposixerr(Tcl_Interp *ip, int fd, const char *m) {
int e;
e= errno;
close(fd);
return cht_posixerr(ip,e,m);
}
void cht_objfreeir(Tcl_Obj *o) {
if (o->typePtr && o->typePtr->freeIntRepProc)
o->typePtr->freeIntRepProc(o);
o->typePtr= 0;
}
void cht_obj_updatestr_vstringls(Tcl_Obj *o, ...) {
va_list al;
char *p;
const char *part;
int l;
size_t pl;
va_start(al,o);
for (l=0; (part= va_arg(al, const char*)); ) {
pl= va_arg(al, size_t);
assert(pl <= INT_MAX/2 - l);
l += pl;
}
va_end(al);
o->length= l;
o->bytes= TALLOC(l+1);
va_start(al,o);
for (p= o->bytes; (part= va_arg(al, const char*)); p += pl) {
pl= va_arg(al, size_t);
memcpy(p, part, pl);
}
va_end(al);
*p= 0;
}
void cht_obj_updatestr_string(Tcl_Obj *o, const char *str) {
cht_obj_updatestr_vstringls(o, str, strlen(str), (char*)0);
}
#define URANDOM "/dev/urandom"
int cht_get_urandom(Tcl_Interp *ip, Byte *buffer, int l) {
static FILE *urandom;
int r;
if (!urandom) {
urandom= fopen(URANDOM,"rb");
if (!urandom) return cht_posixerr(ip,errno,"open " URANDOM);
}
r= fread(buffer,1,l,urandom);
if (r==l) return 0;
if (ferror(urandom)) {
r = cht_posixerr(ip,errno,"read " URANDOM);
} else {
assert(feof(urandom));
r = cht_staticerr(ip, URANDOM " gave eof!", 0);
}
fclose(urandom); urandom=0;
return r;
}
void cht_prepare__basic(Tcl_Interp *ip) {
static int prepared;
if (prepared) return;
Tcl_RegisterObjType(&cht_tabledataid_nearlytype);
Tcl_RegisterObjType(&cht_enum_nearlytype);
Tcl_RegisterObjType(&cht_enum1_nearlytype);
prepared= 1;
}
void cht_setup__commands(Tcl_Interp *ip, const TopLevel_Command *cmds) {
const TopLevel_Command *cmd;
for (cmd= cmds;
cmd->name;
cmd++)
Tcl_CreateObjCommand(ip, (char*)cmd->name, cmd->func, 0,0);
}
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