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 char LF = '\n';
26 static const char CR = '\r';
30 static int my_read (int fd, char string[], int size);
31 static void my_write (int fd, const char string[], int size);
37 bool io_is_ok(const io_t * io) {
39 if (io == NULL) return FALSE;
41 if (io->name == NULL) return FALSE;
43 if (io->in_eof != TRUE && io->in_eof != FALSE) return FALSE;
45 if (io->in_size < 0 || io->in_size > BufferSize) return FALSE;
46 if (io->out_size < 0 || io->out_size > BufferSize) return FALSE;
53 void io_init(io_t * io) {
67 bool io_peek(io_t * io){
76 FD_SET(io->in_fd,set);
78 ret=select(fd_max+1,set,NULL,NULL,&tv);
88 void io_close(io_t * io) {
92 ASSERT(io->out_fd>=0);
94 my_log("Adapter->%s: EOF\n",io->name);
96 if (close(io->out_fd) == -1) {
97 my_fatal("io_close(): close(): %s\n",strerror(errno));
105 void io_get_update(io_t * io) {
110 ASSERT(io_is_ok(io));
112 ASSERT(io->in_fd>=0);
119 size = BufferSize - pos;
123 // io->in_buffer[FormatBufferSize-20]='\0';
124 // my_log("%s","io_get_update(): buffer too small; content starts with:\n");
125 // my_log("[%s...]\n",io->in_buffer);
126 my_fatal("io_get_update(): buffer overflow\n");
129 // read as many data as possible
130 n = my_read(io->in_fd,&io->in_buffer[pos],size);
131 if (UseDebug) my_log("POLYGLOT read %d byte%s from %s\n",n,(n>1)?"s":"",io->name);
133 if (n > 0) { // at least one character was read
135 // update buffer size
137 ASSERT(n>=1&&n<=size);
140 ASSERT(io->in_size>=0&&io->in_size<=BufferSize);
153 bool io_line_ready(const io_t * io) {
155 ASSERT(io_is_ok(io));
157 if (io->in_eof) return TRUE;
159 if (memchr(io->in_buffer,LF,io->in_size) != NULL) return TRUE; // buffer contains LF
166 bool io_get_line(io_t * io, char string[], int size) {
171 ASSERT(io_is_ok(io));
172 ASSERT(string!=NULL);
180 // test for end of buffer
182 if (src >= io->in_size) {
184 my_log("%s->Adapter: EOF\n",io->name);
187 my_fatal("io_get_line(): no EOL in buffer\n");
191 // test for end of string
193 if (dst >= size) my_fatal("io_get_line(): buffer overflow\n");
195 // copy the next character
197 c = io->in_buffer[src++];
199 if (c == LF) { // LF => line complete
202 } else if (c != CR) { // skip CRs
212 ASSERT(io->in_size>=0);
214 if (io->in_size > 0) memmove(&io->in_buffer[0],&io->in_buffer[src],io->in_size);
218 my_log("%s->Adapter: %s\n",io->name,string);
225 void io_send(io_t * io, const char format[], ...) {
227 char string[FormatBufferSize];
230 ASSERT(io_is_ok(io));
231 ASSERT(format!=NULL);
233 ASSERT(io->out_fd>=0);
237 CONSTRUCT_ARG_STRING(format,string);
239 // append string to buffer
241 len = strlen(string);
242 if (io->out_size + len > BufferSize-2) my_fatal("io_send(): buffer overflow\n");
244 memcpy(&io->out_buffer[io->out_size],string,len);
247 ASSERT(io->out_size>=0&&io->out_size<=BufferSize-2);
251 io->out_buffer[io->out_size] = '\0';
252 my_log("Adapter->%s: %s\n",io->name,io->out_buffer);
254 // append EOL to buffer
256 if (UseCR) io->out_buffer[io->out_size++] = CR;
257 io->out_buffer[io->out_size++] = LF;
259 ASSERT(io->out_size>=0&&io->out_size<=BufferSize);
263 if (UseDebug) my_log("POLYGLOT writing %d byte%s to %s\n",io->out_size,(io->out_size>1)?"s":"",io->name);
264 my_write(io->out_fd,io->out_buffer,io->out_size);
271 void io_send_queue(io_t * io, const char format[], ...) {
273 char string[FormatBufferSize];
276 ASSERT(io_is_ok(io));
277 ASSERT(format!=NULL);
279 ASSERT(io->out_fd>=0);
283 CONSTRUCT_ARG_STRING(format,string);
285 // append string to buffer
287 len = strlen(string);
288 if (io->out_size + len > BufferSize-2) my_fatal("io_send_queue(): buffer overflow\n");
290 memcpy(&io->out_buffer[io->out_size],string,len);
293 ASSERT(io->out_size>=0&&io->out_size<=BufferSize-2);
298 static int my_read(int fd, char string[], int size) {
303 ASSERT(string!=NULL);
307 n = read(fd,string,size);
308 } while (n == -1 && errno == EINTR);
310 if (n == -1) my_fatal("my_read(): read(): %s\n",strerror(errno));
319 static void my_write(int fd, const char string[], int size) {
324 ASSERT(string!=NULL);
329 n = write(fd,string,size);
331 // if (n == -1 && errno != EINTR && errno != EPIPE) my_fatal("my_write(): write(): %s\n",strerror(errno));
335 } else if (errno == EINTR) {
336 n = 0; // nothing has been written
337 } else if (errno == EPIPE) {
338 n = size; // pretend everything has been written
340 my_fatal("my_write(): write(): %s\n",strerror(errno));