13 #include <sys/types.h>
14 #include <sys/select.h>
22 static const bool UseDebug = FALSE;
23 static const bool UseCR = FALSE;
25 static const int StringSize = 4096;
27 static const char LF = '\n';
28 static const char CR = '\r';
32 static int my_read (int fd, char string[], int size);
33 static void my_write (int fd, const char string[], int size);
39 bool io_is_ok(const io_t * io) {
41 if (io == NULL) return FALSE;
43 if (io->name == NULL) return FALSE;
45 if (io->in_eof != TRUE && io->in_eof != FALSE) return FALSE;
47 if (io->in_size < 0 || io->in_size > BufferSize) return FALSE;
48 if (io->out_size < 0 || io->out_size > BufferSize) return FALSE;
55 void io_init(io_t * io) {
69 bool io_peek(io_t * io){
78 FD_SET(io->in_fd,set);
80 ret=select(fd_max+1,set,NULL,NULL,&tv);
90 void io_close(io_t * io) {
94 ASSERT(io->out_fd>=0);
96 my_log("Adapter->%s: EOF\n",io->name);
98 if (close(io->out_fd) == -1) {
99 my_fatal("io_close(): close(): %s\n",strerror(errno));
107 void io_get_update(io_t * io) {
112 ASSERT(io_is_ok(io));
114 ASSERT(io->in_fd>=0);
121 size = BufferSize - pos;
122 if (size <= 0) my_fatal("io_get_update(): buffer overflow\n");
124 // read as many data as possible
125 n = my_read(io->in_fd,&io->in_buffer[pos],size);
126 if (UseDebug) my_log("POLYGLOT read %d byte%s from %s\n",n,(n>1)?"s":"",io->name);
128 if (n > 0) { // at least one character was read
130 // update buffer size
132 ASSERT(n>=1&&n<=size);
135 ASSERT(io->in_size>=0&&io->in_size<=BufferSize);
147 bool io_line_ready(const io_t * io) {
149 ASSERT(io_is_ok(io));
151 if (io->in_eof) return TRUE;
153 if (memchr(io->in_buffer,LF,io->in_size) != NULL) return TRUE; // buffer contains LF
160 bool io_get_line(io_t * io, char string[], int size) {
165 ASSERT(io_is_ok(io));
166 ASSERT(string!=NULL);
174 // test for end of buffer
176 if (src >= io->in_size) {
178 my_log("%s->Adapter: EOF\n",io->name);
181 my_fatal("io_get_line(): no EOL in buffer\n");
185 // test for end of string
187 if (dst >= size) my_fatal("io_get_line(): buffer overflow\n");
189 // copy the next character
191 c = io->in_buffer[src++];
193 if (c == LF) { // LF => line complete
196 } else if (c != CR) { // skip CRs
206 ASSERT(io->in_size>=0);
208 if (io->in_size > 0) memmove(&io->in_buffer[0],&io->in_buffer[src],io->in_size);
212 my_log("%s->Adapter: %s\n",io->name,string);
219 void io_send(io_t * io, const char format[], ...) {
221 char string[FormatBufferSize];
224 ASSERT(io_is_ok(io));
225 ASSERT(format!=NULL);
227 ASSERT(io->out_fd>=0);
231 CONSTRUCT_ARG_STRING(format,string);
233 // append string to buffer
235 len = strlen(string);
236 if (io->out_size + len > BufferSize-2) my_fatal("io_send(): buffer overflow\n");
238 memcpy(&io->out_buffer[io->out_size],string,len);
241 ASSERT(io->out_size>=0&&io->out_size<=BufferSize-2);
245 io->out_buffer[io->out_size] = '\0';
246 my_log("Adapter->%s: %s\n",io->name,io->out_buffer);
248 // append EOL to buffer
250 if (UseCR) io->out_buffer[io->out_size++] = CR;
251 io->out_buffer[io->out_size++] = LF;
253 ASSERT(io->out_size>=0&&io->out_size<=BufferSize);
257 if (UseDebug) my_log("POLYGLOT writing %d byte%s to %s\n",io->out_size,(io->out_size>1)?"s":"",io->name);
258 my_write(io->out_fd,io->out_buffer,io->out_size);
265 void io_send_queue(io_t * io, const char format[], ...) {
267 char string[FormatBufferSize];
270 ASSERT(io_is_ok(io));
271 ASSERT(format!=NULL);
273 ASSERT(io->out_fd>=0);
277 CONSTRUCT_ARG_STRING(format,string);
279 // append string to buffer
281 len = strlen(string);
282 if (io->out_size + len > BufferSize-2) my_fatal("io_send_queue(): buffer overflow\n");
284 memcpy(&io->out_buffer[io->out_size],string,len);
287 ASSERT(io->out_size>=0&&io->out_size<=BufferSize-2);
292 static int my_read(int fd, char string[], int size) {
297 ASSERT(string!=NULL);
301 n = read(fd,string,size);
302 } while (n == -1 && errno == EINTR);
304 if (n == -1) my_fatal("my_read(): read(): %s\n",strerror(errno));
313 static void my_write(int fd, const char string[], int size) {
318 ASSERT(string!=NULL);
323 n = write(fd,string,size);
325 // if (n == -1 && errno != EINTR && errno != EPIPE) my_fatal("my_write(): write(): %s\n",strerror(errno));
329 } else if (errno == EINTR) {
330 n = 0; // nothing has been written
331 } else if (errno == EPIPE) {
332 n = size; // pretend everything has been written
334 my_fatal("my_write(): write(): %s\n",strerror(errno));