/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1997-2016. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifndef __WIN32__
#include <unistd.h>
#endif
#include <stdarg.h>
#include "runner.h"
#ifndef __WIN32__
#define _O_BINARY 0
#define _setmode(fd, mode)
#endif
#define HEADER_SIZE 4
static char* progname; /* Name of this program (from argv[0]). */
static int fd_from_erl; /* File descriptor from Erlang. */
static int fd_to_erl; /* File descriptor to Erlang. */
static int packet_loop();
static void ensure_buf_big_enough();
static int readn();
static void reply(char* buf, unsigned size);
static void dump();
void
run_tests(char* argv0, TestCase test_cases[], unsigned number)
{
int i;
int n;
char* packet;
progname = argv0;
_setmode(0, _O_BINARY);
_setmode(1, _O_BINARY);
fd_from_erl = 0;
fd_to_erl = 1;
packet = read_packet(&n);
/*
* Dispatch to the appropriate test function.
*/
i = packet[0] * 256 + packet[1];
if (i >= number) {
fprintf(stderr, "%s: bad test case number %d",
progname, i);
free(packet);
exit(1);
} else {
(*test_cases[i])();
free(packet);
}
}
/***********************************************************************
*
* R e a d i n g p a c k e t s
*
************************************************************************/
/*
* Reads an Erlang term.
*
* Returns: A pointer to a term (an ETERM structure) if there was
* at term available, or a NULL pointer if there was an 'eot' (end-of-test)
* packet. Aborts if anything else received.
*/
ETERM*
get_term(void)
{
char* encoded;
ETERM* term;
int n;
encoded = read_packet(&n);
switch (encoded[0]) {
case 'e':
free(encoded);
return NULL;
case 't':
term = erl_decode(encoded+1);
free(encoded);
if (term == NULL) {
fail("Failed to decode term");
exit(0);
}
return term;
default:
fprintf(stderr, "Garbage received: ");
dump(encoded, n, 16);
putc('\n', stderr);
fail("C program received garbage");
free(encoded);
exit(1);
}
}
/*
* Reads a packet from Erlang. The packet must be a standard {packet, 2}
* packet. This function aborts if any error is detected (including EOF).
*
* Returns: The number of bytes in the packet.
*/
char *read_packet(int *len)
{
unsigned char* io_buf = NULL; /* Buffer for file i/o. */
int i;
unsigned char header[HEADER_SIZE];
unsigned packet_length; /* Length of current packet. */
int bytes_read;
/*
* Read the packet header.
*/
bytes_read = readn(fd_from_erl, header, HEADER_SIZE);
if (bytes_read == 0) {
fprintf(stderr, "%s: Unexpected end of file\n", progname);
exit(1);
}
if (bytes_read != HEADER_SIZE) {
fprintf(stderr, "%s: Failed to read packet header\n", progname);
exit(1);
}
/*
* Get the length of this packet.
*/
packet_length = 0;
for (i = 0; i < HEADER_SIZE; i++)
packet_length = (packet_length << 8) | header[i];
if (len) *len=packet_length; /* report length only if caller requested it */
if ((io_buf = (char *) malloc(packet_length)) == NULL) {
fprintf(stderr, "%s: insufficient memory for i/o buffer of size %d\n",
progname, packet_length);
exit(1);
}
/*
* Read the packet itself.
*/
bytes_read = readn(fd_from_erl, io_buf, packet_length);
if (bytes_read != packet_length) {
fprintf(stderr, "%s: couldn't read packet of length %d\r\n",
progname, packet_length);
free(io_buf);
exit(1);
}
return io_buf;
}
/***********************************************************************
* S e n d i n g r e p l i e s
*
* The functions below send various types of replies back to Erlang.
* Each reply start with a letter indicating the type of reply.
*
* Reply Translated to on Erlang side
* ----- ----------------------------
* [$b|Bytes] {bytes, Bytes}
* [$e] eot
* [$f] ct:fail()
* [$f|Reason] ct:fail(Reason)
* [$t|EncodedTerm] {term, Term}
* [$N] 'NULL'
* [$m|Message] io:format("~s", [Message]) (otherwise ignored)
*
***********************************************************************/
/*
* This function reports the outcome of a test fail. It is useful if
* you implement a test case entirely in C code.
*
* If the ok argument is zero, a [$f] reply will be sent to the
* Erlang side (causing ct:fail() to be called); otherwise,
* the atom 'eot' will be sent to Erlang.
*
* If you need to provide more details on a failure, use the fail() function.
*/
void
do_report(file, line, ok)
char* file;
int line;
int ok; /* Zero if failed; non-zero otherwise. */
{
char reason;
unsigned long ab;
unsigned long fb;
reason = ok ? 'e' : 'f';
if (!ok) {
do_fail(file, line, "Generic failure");
} else {
/* release all unallocated blocks */
erl_eterm_release();
/* check mem usage stats */
erl_eterm_statistics(&ab, &fb);
if ((ab == 0) && (fb == 0) ) {
reply(&reason, 1);
}
else {
char sbuf[128];
sprintf(sbuf, "still %lu terms allocated,"
" %lu on freelist at end of test", ab, fb);
do_fail(file, line, sbuf);
}
}
}
/*
* This function causes a call to ct:fail(Reason) on the
* Erlang side.
*/
void
do_fail(char* file, int line, char* reason)
{
char sbuf[2048];
sbuf[0] = 'f';
sprintf(sbuf+1, "%s, line %d: %s", file, line, reason);
reply(sbuf, 1+strlen(sbuf+1));
}
/*
* This function sends a message to the Erlang side.
* The message will be written to the test servers log file,
* but will otherwise be completly ignored.
*/
void
message(char* format, ...)
{
va_list ap;
char sbuf[1024];
sbuf[0] = 'm';
va_start(ap, format);
vsprintf(sbuf+1, format, ap);
va_end(ap);
reply(sbuf, 1+strlen(sbuf+1));
}
/*
* This function sends the given term to the Erlang side,
* where it will be received as {term, Term}.
*
* If the given pointer is NULL (indicating an invalid term),
* the result on the Erlang side will be the atom 'NULL'.
*
* After sending the term, this function frees the term by
* calling erl_free_term().
*/
void
send_term(term)
ETERM* term; /* Term to be sent to Erlang side. */
{
char encoded[64*1024];
int n;
if (term == NULL) {
encoded[0] = 'N';
n = 1;
} else {
encoded[0] = 't';
n = 1 + erl_encode(term, encoded+1);
erl_free_term(term);
}
reply(encoded, n);
}
#if 0
/* Seriously broken!!! */
void
send_bin_term(x_ei_buff* x)
{
x_ei_buff x2;
x_ei_new(&x2);
x2.buff[x2.index++] = 't';
x_ei_append(&x2, x);
reply(x2.buff, x2.index);
free(x2.buff);
}
#endif
/*
* This function sends a raw buffer of data to the
* Erlang side, where it will be received as {bytes, Bytes}.
*/
void
send_buffer(buf, size)
char* buf; /* Buffer with bytes to send to Erlang. */
int size; /* Size of data to send to Erlang. */
{
char* send_buf;
send_buf = (char *) malloc(size+1);
send_buf[0] = 'b';
memcpy(send_buf+1, buf, size);
reply(send_buf, size+1);
free(send_buf);
}
/***********************************************************************
*
* P r i v a t e h e l p e r s
*
***********************************************************************/
/*
* Sends a packet back to Erlang.
*/
static void
reply(reply_buf, size)
char* reply_buf; /* Buffer with reply. */
unsigned size; /* Size of reply. */
{
int n; /* Temporary to hold size. */
int i; /* Loop counter. */
char* buf;
buf = (char *) malloc(size+HEADER_SIZE);
memcpy(buf+HEADER_SIZE, reply_buf, size);
/*
* Fill the header starting with the least significant byte.
*/
n = size;
for (i = HEADER_SIZE-1; i >= 0; i--) {
buf[i] = (char) n; /* Store least significant byte. */
n = n >> 8;
}
size += HEADER_SIZE;
/*
fprintf(stderr, "\r\nReply size: %u\r\n",
(unsigned)buf[0] << 8 + (unsigned)buf[1]);
for (i = 0; i < size; i++) {
fprintf(stderr,"%u %c\r\n",buf[i],buf[i]);
}
fprintf(stderr, "\r\n");
*/
write(fd_to_erl, buf, size);
free(buf);
}
/*
* Reads len number of bytes.
*/
static int
readn(fd, buf, len)
int fd; /* File descriptor to read from. */
unsigned char *buf; /* Store in this buffer. */
int len; /* Number of bytes to read. */
{
int n; /* Byte count in last read call. */
int sofar = 0; /* Bytes read so far. */
do {
if ((n = read(fd, buf+sofar, len-sofar)) <= 0)
/* error or EOF in read */
return(n);
sofar += n;
} while (sofar < len);
return sofar;
}
void
dump(buf, sz, max)
unsigned char* buf;
int sz;
int max;
{
int i, imax;
char comma[5] = ",";
if (!sz)
return;
if (sz > max)
imax = max;
else
imax = sz;
for (i=0; i<imax; i++) {
if (i == imax-1) {
if (sz > max)
strcpy(comma, ",...");
else
comma[0] = 0;
}
if (isdigit(buf[i]))
fprintf(stderr, "%u%s", (int)(buf[i]), comma);
else {
if (isalpha(buf[i])) {
fprintf(stderr, "%c%s", buf[i], comma);
}
else
fprintf(stderr, "%u%s", (int)(buf[i]), comma);
}
}
}
