Actual source code: mprint.c

  1: /*
  2:       Utilities routines to add simple ASCII IO capability.
  3: */
  4: #include <../src/sys/fileio/mprint.h>
  5: #include <errno.h>
  6: /*
  7:    If petsc_history is on, then all Petsc*Printf() results are saved
  8:    if the appropriate (usually .petschistory) file.
  9: */
 10: PETSC_INTERN FILE *petsc_history;
 11: /*
 12:      Allows one to overwrite where standard out is sent. For example
 13:      PETSC_STDOUT = fopen("/dev/ttyXX","w") will cause all standard out
 14:      writes to go to terminal XX; assuming you have write permission there
 15: */
 16: FILE *PETSC_STDOUT = NULL;
 17: /*
 18:      Allows one to overwrite where standard error is sent. For example
 19:      PETSC_STDERR = fopen("/dev/ttyXX","w") will cause all standard error
 20:      writes to go to terminal XX; assuming you have write permission there
 21: */
 22: FILE *PETSC_STDERR = NULL;

 24: /*@C
 25:      PetscFormatConvertGetSize - Gets the length of a string needed to hold data converted with `PetscFormatConvert()` based on format

 27:    No Fortran Support

 29:    Input Parameter:
 30: .   format - the PETSc format string

 32:    Output Parameter:
 33: .   size - the needed length of the new format

 35:    Level: developer

 37: .seealso: `PetscFormatConvert()`, `PetscVSNPrintf()`, `PetscVFPrintf()`
 38: @*/
 39: PetscErrorCode PetscFormatConvertGetSize(const char *format, size_t *size)
 40: {
 41:   size_t   sz = 0;
 42:   PetscInt i  = 0;

 44:   PetscFunctionBegin;
 47:   while (format[i]) {
 48:     if (format[i] == '%') {
 49:       if (format[i + 1] == '%') {
 50:         i += 2;
 51:         sz += 2;
 52:         continue;
 53:       }
 54:       /* Find the letter */
 55:       while (format[i] && (format[i] <= '9')) {
 56:         ++i;
 57:         ++sz;
 58:       }
 59:       switch (format[i]) {
 60: #if PetscDefined(USE_64BIT_INDICES)
 61:       case 'D':
 62:         sz += 2;
 63:         break;
 64: #endif
 65:       case 'g':
 66:         sz += 4;
 67:       default:
 68:         break;
 69:       }
 70:     }
 71:     ++i;
 72:     ++sz;
 73:   }
 74:   *size = sz + 1; /* space for NULL character */
 75:   PetscFunctionReturn(PETSC_SUCCESS);
 76: }

 78: /*@C
 79:      PetscFormatConvert - converts %g to [|%g|] so that `PetscVSNPrintf()` can ensure all %g formatted numbers have a decimal point when printed. The
 80:      decimal point is then used by the `petscdiff` script so that differences in floating point number output is ignored in the test harness.

 82:    No Fortran Support

 84:    Input Parameters:
 85: +   format - the PETSc format string
 86: .   newformat - the location to put the new format
 87: -   size - the length of newformat, you can use `PetscFormatConvertGetSize()` to compute the needed size

 89:    Level: developer

 91:     Note:
 92:     Deprecated usage also converts the %D to %d for 32 bit PETSc indices and %lld for 64 bit PETSc indices. This feature is no
 93:     longer used in PETSc code instead use %" PetscInt_FMT " in the format string

 95: .seealso: `PetscFormatConvertGetSize()`, `PetscVSNPrintf()`, `PetscVFPrintf()`
 96: @*/
 97: PetscErrorCode PetscFormatConvert(const char *format, char *newformat)
 98: {
 99:   PetscInt i = 0, j = 0;

101:   PetscFunctionBegin;
102:   while (format[i]) {
103:     if (format[i] == '%' && format[i + 1] == '%') {
104:       newformat[j++] = format[i++];
105:       newformat[j++] = format[i++];
106:     } else if (format[i] == '%') {
107:       if (format[i + 1] == 'g') {
108:         newformat[j++] = '[';
109:         newformat[j++] = '|';
110:       }
111:       /* Find the letter */
112:       for (; format[i] && format[i] <= '9'; i++) newformat[j++] = format[i];
113:       switch (format[i]) {
114:       case 'D':
115: #if !defined(PETSC_USE_64BIT_INDICES)
116:         newformat[j++] = 'd';
117: #else
118:         newformat[j++] = 'l';
119:         newformat[j++] = 'l';
120:         newformat[j++] = 'd';
121: #endif
122:         break;
123:       case 'g':
124:         newformat[j++] = format[i];
125:         if (format[i - 1] == '%') {
126:           newformat[j++] = '|';
127:           newformat[j++] = ']';
128:         }
129:         break;
130:       case 'G':
131:         SETERRQ(PETSC_COMM_SELF, PETSC_ERR_SUP, "%%G format is no longer supported, use %%g and cast the argument to double");
132:       case 'F':
133:         SETERRQ(PETSC_COMM_SELF, PETSC_ERR_SUP, "%%F format is no longer supported, use %%f and cast the argument to double");
134:       default:
135:         newformat[j++] = format[i];
136:         break;
137:       }
138:       i++;
139:     } else newformat[j++] = format[i++];
140:   }
141:   newformat[j] = 0;
142:   PetscFunctionReturn(PETSC_SUCCESS);
143: }

145: #define PETSCDEFAULTBUFFERSIZE 8 * 1024

147: /*@C
148:      PetscVSNPrintf - The PETSc version of `vsnprintf()`. Ensures that all `%g` formatted arguments' output contains the decimal point (which
149:      is used by the test harness)

151:    Input Parameters:
152: +   str - location to put result
153: .   len - the amount of space in str
154: +   format - the PETSc format string
155: -   fullLength - the amount of space in str actually used.

157:    Level: developer

159:    Developer Note:
160:    This function may be called from an error handler, if an error occurs when it is called by the error handler than likely
161:    a recursion will occur resulting in a crash of the program.

163:    If the length of the format string `format` is on the order of `PETSCDEFAULTBUFFERSIZE` (8 * 1024 bytes), this function will call `PetscMalloc()`

165: .seealso: `PetscFormatConvert()`, `PetscFormatConvertGetSize()`, `PetscVSNPrintf()`, `PetscErrorPrintf()`, `PetscVPrintf()`
166: @*/
167: PetscErrorCode PetscVSNPrintf(char *str, size_t len, const char *format, size_t *fullLength, va_list Argp)
168: {
169:   char  *newformat = NULL;
170:   char   formatbuf[PETSCDEFAULTBUFFERSIZE];
171:   size_t newLength;
172:   int    flen;

174:   PetscFunctionBegin;
175:   PetscCall(PetscFormatConvertGetSize(format, &newLength));
176:   if (newLength < sizeof(formatbuf)) {
177:     newformat = formatbuf;
178:     newLength = sizeof(formatbuf) - 1;
179:   } else {
180:     PetscCall(PetscMalloc1(newLength, &newformat));
181:   }
182:   PetscCall(PetscFormatConvert(format, newformat));
183: #if defined(PETSC_HAVE_VSNPRINTF)
184:   flen = vsnprintf(str, len, newformat, Argp);
185: #else
186:   #error "vsnprintf not found"
187: #endif
188:   if (newLength > sizeof(formatbuf) - 1) PetscCall(PetscFree(newformat));
189:   {
190:     PetscBool foundedot;
191:     size_t    cnt = 0, ncnt = 0, leng;
192:     PetscCall(PetscStrlen(str, &leng));
193:     if (leng > 4) {
194:       for (cnt = 0; cnt < leng - 4; cnt++) {
195:         if (str[cnt] == '[' && str[cnt + 1] == '|') {
196:           flen -= 4;
197:           cnt++;
198:           cnt++;
199:           foundedot = PETSC_FALSE;
200:           for (; cnt < leng - 1; cnt++) {
201:             if (str[cnt] == '|' && str[cnt + 1] == ']') {
202:               cnt++;
203:               if (!foundedot) str[ncnt++] = '.';
204:               ncnt--;
205:               break;
206:             } else {
207:               if (str[cnt] == 'e' || str[cnt] == '.') foundedot = PETSC_TRUE;
208:               str[ncnt++] = str[cnt];
209:             }
210:           }
211:         } else {
212:           str[ncnt] = str[cnt];
213:         }
214:         ncnt++;
215:       }
216:       while (cnt < leng) {
217:         str[ncnt] = str[cnt];
218:         ncnt++;
219:         cnt++;
220:       }
221:       str[ncnt] = 0;
222:     }
223:   }
224: #if defined(PETSC_HAVE_WINDOWS_H) && !defined(PETSC_HAVE__SET_OUTPUT_FORMAT)
225:   /* older Windows OS always produces e-+0np for floating point output; remove the extra 0 */
226:   {
227:     size_t cnt = 0, ncnt = 0, leng;
228:     PetscCall(PetscStrlen(str, &leng));
229:     if (leng > 5) {
230:       for (cnt = 0; cnt < leng - 4; cnt++) {
231:         if (str[cnt] == 'e' && (str[cnt + 1] == '-' || str[cnt + 1] == '+') && str[cnt + 2] == '0' && str[cnt + 3] >= '0' && str[cnt + 3] <= '9' && str[cnt + 4] >= '0' && str[cnt + 4] <= '9') {
232:           str[ncnt] = str[cnt];
233:           ncnt++;
234:           cnt++;
235:           str[ncnt] = str[cnt];
236:           ncnt++;
237:           cnt++;
238:           cnt++;
239:           str[ncnt] = str[cnt];
240:         } else {
241:           str[ncnt] = str[cnt];
242:         }
243:         ncnt++;
244:       }
245:       while (cnt < leng) {
246:         str[ncnt] = str[cnt];
247:         ncnt++;
248:         cnt++;
249:       }
250:       str[ncnt] = 0;
251:     }
252:   }
253: #endif
254:   if (fullLength) *fullLength = 1 + (size_t)flen;
255:   PetscFunctionReturn(PETSC_SUCCESS);
256: }

258: /*@C
259:   PetscFFlush - Flush a file stream

261:   Input Parameter:
262: . fd - The file stream handle

264:   Level: intermediate

266:   Notes:
267:   For output streams (and for update streams on which the last operation was output), writes
268:   any unwritten data from the stream's buffer to the associated output device.

270:   For input streams (and for update streams on which the last operation was input), the
271:   behavior is undefined.

273:   If `fd` is `NULL`, all open output streams are flushed, including ones not directly
274:   accessible to the program.

276: .seealso: `PetscPrintf()`, `PetscFPrintf()`, `PetscVFPrintf()`, `PetscVSNPrintf()`
277: @*/
278: PetscErrorCode PetscFFlush(FILE *fd)
279: {
280:   int ret;

282:   PetscFunctionBegin;
284:   ret = fflush(fd);
285:   // could also use PetscCallExternal() here, but since we can get additional error explanation
286:   // from strerror() we opted for a manual check
287:   PetscCheck(ret == 0, PETSC_COMM_SELF, PETSC_ERR_FILE_WRITE, "Error in fflush(): error code %d (%s)", ret, strerror(errno));
288:   PetscFunctionReturn(PETSC_SUCCESS);
289: }

291: /*@C
292:      PetscVFPrintf -  All PETSc standard out and error messages are sent through this function; so, in theory, this can
293:         can be replaced with something that does not simply write to a file.

295:       To use, write your own function for example,
296: .vb
297:    PetscErrorCode mypetscvfprintf(FILE *fd, const char format[], va_list Argp)
298:    {
299:      PetscErrorCode ierr;

301:      PetscFunctionBegin;
302:       if (fd != stdout && fd != stderr) {  handle regular files
303:          CHKERR(PetscVFPrintfDefault(fd,format,Argp));
304:      } else {
305:         char   buff[BIG];
306:         size_t length;
307:         PetscCall(PetscVSNPrintf(buff,BIG,format,&length,Argp));
308:         now send buff to whatever stream or whatever you want
309:     }
310:     PetscFunctionReturn(PETSC_SUCCESS);
311:    }
312: .ve
313:    then before the call to `PetscInitialize()` do the assignment `PetscVFPrintf = mypetscvfprintf`;

315:   Level:  developer

317:    Note:
318:    For error messages this may be called by any process, for regular standard out it is
319:    called only by process 0 of a given communicator

321:    Developer Note:
322:    This could be called by an error handler, if that happens then a recursion of the error handler may occur
323:    and a resulting crash

325: .seealso: `PetscVSNPrintf()`, `PetscErrorPrintf()`, `PetscFFlush()`
326: @*/
327: PetscErrorCode PetscVFPrintfDefault(FILE *fd, const char *format, va_list Argp)
328: {
329:   char   str[PETSCDEFAULTBUFFERSIZE];
330:   char  *buff = str;
331:   size_t fullLength;
332: #if defined(PETSC_HAVE_VA_COPY)
333:   va_list Argpcopy;
334: #endif

336:   PetscFunctionBegin;
337: #if defined(PETSC_HAVE_VA_COPY)
338:   va_copy(Argpcopy, Argp);
339: #endif
340:   PetscCall(PetscVSNPrintf(str, sizeof(str), format, &fullLength, Argp));
341:   if (fullLength > sizeof(str)) {
342:     PetscCall(PetscMalloc1(fullLength, &buff));
343: #if defined(PETSC_HAVE_VA_COPY)
344:     PetscCall(PetscVSNPrintf(buff, fullLength, format, NULL, Argpcopy));
345: #else
346:     SETERRQ(PETSC_COMM_SELF, PETSC_ERR_LIB, "C89 does not support va_copy() hence cannot print long strings with PETSc printing routines");
347: #endif
348:   }
349: #if defined(PETSC_HAVE_VA_COPY)
350:   va_end(Argpcopy);
351: #endif
352:   {
353:     const int err = fprintf(fd, "%s", buff);
354:     // cannot use PetscCallExternal() for fprintf since the return value is "number of
355:     // characters transmitted to the output stream" on success
356:     PetscCheck(err >= 0, PETSC_COMM_SELF, PETSC_ERR_FILE_WRITE, "fprintf() returned error code %d", err);
357:   }
358:   PetscCall(PetscFFlush(fd));
359:   if (buff != str) PetscCall(PetscFree(buff));
360:   PetscFunctionReturn(PETSC_SUCCESS);
361: }

363: /*@C
364:     PetscSNPrintf - Prints to a string of given length

366:     Not Collective

368:     Input Parameters:
369: +   str - the string to print to
370: .   len - the length of `str`
371: .   format - the usual `printf()` format string
372: -   ... - any arguments that are to be printed, each much have an appropriate symbol in the format argument

374:    Level: intermediate

376: .seealso: `PetscSynchronizedFlush()`, `PetscSynchronizedFPrintf()`, `PetscFPrintf()`, `PetscVSNPrintf()`,
377:           `PetscPrintf()`, `PetscViewerASCIIPrintf()`, `PetscViewerASCIISynchronizedPrintf()`,
378:           `PetscVFPrintf()`, `PetscFFlush()`
379: @*/
380: PetscErrorCode PetscSNPrintf(char *str, size_t len, const char format[], ...)
381: {
382:   size_t  fullLength;
383:   va_list Argp;

385:   PetscFunctionBegin;
386:   va_start(Argp, format);
387:   PetscCall(PetscVSNPrintf(str, len, format, &fullLength, Argp));
388:   va_end(Argp);
389:   PetscFunctionReturn(PETSC_SUCCESS);
390: }

392: /*@C
393:     PetscSNPrintfCount - Prints to a string of given length, returns count of characters printed

395:     Not Collective

397:     Input Parameters:
398: +   str - the string to print to
399: .   len - the length of `str`
400: .   format - the usual `printf()` format string
401: -   ... - any arguments that are to be printed, each much have an appropriate symbol in the format argument

403:     Output Parameter:
404: .   countused - number of characters printed

406:    Level: intermediate

408: .seealso: `PetscSynchronizedFlush()`, `PetscSynchronizedFPrintf()`, `PetscFPrintf()`, `PetscVSNPrintf()`,
409:           `PetscPrintf()`, `PetscViewerASCIIPrintf()`, `PetscViewerASCIISynchronizedPrintf()`, `PetscSNPrintf()`, `PetscVFPrintf()`
410: @*/
411: PetscErrorCode PetscSNPrintfCount(char *str, size_t len, const char format[], size_t *countused, ...)
412: {
413:   va_list Argp;

415:   PetscFunctionBegin;
416:   va_start(Argp, countused);
417:   PetscCall(PetscVSNPrintf(str, len, format, countused, Argp));
418:   va_end(Argp);
419:   PetscFunctionReturn(PETSC_SUCCESS);
420: }

422: PrintfQueue petsc_printfqueue = NULL, petsc_printfqueuebase = NULL;
423: int         petsc_printfqueuelength = 0;

425: static inline PetscErrorCode PetscVFPrintf_Private(MPI_Comm comm, FILE *fd, const char format[], va_list Argp)
426: {
427:   const PetscBool tee = (PetscBool)(petsc_history && (fd != petsc_history));
428:   PetscMPIInt     rank;
429:   va_list         cpy;

431:   PetscFunctionBegin;
432:   PetscCheck(comm != MPI_COMM_NULL, PETSC_COMM_SELF, PETSC_ERR_PLIB, "Called with MPI_COMM_NULL, likely PetscObjectComm() failed");
433:   PetscCallMPI(MPI_Comm_rank(comm, &rank));
434:   if (PetscLikely(rank != 0)) PetscFunctionReturn(PETSC_SUCCESS);
435:   // must do this before we possibly consume Argp
436:   if (tee) va_copy(cpy, Argp);
437:   PetscCall((*PetscVFPrintf)(fd, format, Argp));
438:   if (tee) {
439:     PetscCall((*PetscVFPrintf)(petsc_history, format, cpy));
440:     va_end(cpy);
441:   }
442:   PetscFunctionReturn(PETSC_SUCCESS);
443: }

445: static inline PetscErrorCode PetscSynchronizedFPrintf_Private(MPI_Comm comm, FILE *fp, const char format[], va_list Argp)
446: {
447:   PetscMPIInt rank;
448:   va_list     cpy;

450:   PetscFunctionBegin;
451:   PetscCheck(comm != MPI_COMM_NULL, PETSC_COMM_SELF, PETSC_ERR_PLIB, "Called with MPI_COMM_NULL, likely PetscObjectComm() failed");
452:   PetscCallMPI(MPI_Comm_rank(comm, &rank));
453:   /* First processor prints immediately to fp */
454:   if (rank == 0) {
455:     va_copy(cpy, Argp);
456:     PetscCall(PetscVFPrintf_Private(comm, fp, format, cpy));
457:     va_end(cpy);
458:   } else { /* other processors add to local queue */
459:     PrintfQueue next;
460:     size_t      fullLength = PETSCDEFAULTBUFFERSIZE;

462:     PetscCall(PetscNew(&next));
463:     if (petsc_printfqueue) {
464:       petsc_printfqueue->next = next;
465:       petsc_printfqueue       = next;
466:       petsc_printfqueue->next = NULL;
467:     } else petsc_printfqueuebase = petsc_printfqueue = next;
468:     petsc_printfqueuelength++;
469:     next->size   = 0;
470:     next->string = NULL;
471:     while (fullLength >= next->size) {
472:       next->size = fullLength + 1;
473:       PetscCall(PetscFree(next->string));
474:       PetscCall(PetscMalloc1(next->size, &next->string));
475:       PetscCall(PetscArrayzero(next->string, next->size));
476:       va_copy(cpy, Argp);
477:       PetscCall(PetscVSNPrintf(next->string, next->size, format, &fullLength, cpy));
478:       va_end(cpy);
479:     }
480:   }
481:   PetscFunctionReturn(PETSC_SUCCESS);
482: }

484: /*@C
485:     PetscSynchronizedPrintf - Prints synchronized output from several processors.
486:     Output of the first processor is followed by that of the second, etc.

488:     Not Collective

490:     Input Parameters:
491: +   comm - the MPI communicator
492: -   format - the usual `printf()` format string

494:    Level: intermediate

496:     Note:
497:     REQUIRES a call to `PetscSynchronizedFlush()` by all the processes after the completion of the calls to `PetscSynchronizedPrintf()` for the information
498:     from all the processors to be printed.

500:     Fortran Note:
501:     The call sequence is `PetscSynchronizedPrintf`(`MPI_Comm`, `character`(*), `PetscErrorCode` ierr).
502:     That is, you can only pass a single character string from Fortran.

504: .seealso: `PetscSynchronizedFlush()`, `PetscSynchronizedFPrintf()`, `PetscFPrintf()`,
505:           `PetscPrintf()`, `PetscViewerASCIIPrintf()`, `PetscViewerASCIISynchronizedPrintf()`,
506:           `PetscFFlush()`
507: @*/
508: PetscErrorCode PetscSynchronizedPrintf(MPI_Comm comm, const char format[], ...)
509: {
510:   va_list Argp;

512:   PetscFunctionBegin;
513:   va_start(Argp, format);
514:   PetscCall(PetscSynchronizedFPrintf_Private(comm, PETSC_STDOUT, format, Argp));
515:   va_end(Argp);
516:   PetscFunctionReturn(PETSC_SUCCESS);
517: }

519: /*@C
520:     PetscSynchronizedFPrintf - Prints synchronized output to the specified file from
521:     several processors.  Output of the first processor is followed by that of the
522:     second, etc.

524:     Not Collective

526:     Input Parameters:
527: +   comm - the MPI communicator
528: .   fd - the file pointer
529: -   format - the usual `printf()` format string

531:     Level: intermediate

533:     Note:
534:     REQUIRES a intervening call to `PetscSynchronizedFlush()` for the information
535:     from all the processors to be printed.

537: .seealso: `PetscSynchronizedPrintf()`, `PetscSynchronizedFlush()`, `PetscFPrintf()`,
538:           `PetscFOpen()`, `PetscViewerASCIISynchronizedPrintf()`, `PetscViewerASCIIPrintf()`,
539:           `PetscFFlush()`
540: @*/
541: PetscErrorCode PetscSynchronizedFPrintf(MPI_Comm comm, FILE *fp, const char format[], ...)
542: {
543:   va_list Argp;

545:   PetscFunctionBegin;
546:   va_start(Argp, format);
547:   PetscCall(PetscSynchronizedFPrintf_Private(comm, fp, format, Argp));
548:   va_end(Argp);
549:   PetscFunctionReturn(PETSC_SUCCESS);
550: }

552: /*@C
553:     PetscSynchronizedFlush - Flushes to the screen output from all processors
554:     involved in previous `PetscSynchronizedPrintf()`/`PetscSynchronizedFPrintf()` calls.

556:     Collective

558:     Input Parameters:
559: +   comm - the MPI communicator
560: -   fd - the file pointer (valid on process 0 of the communicator)

562:     Level: intermediate

564:     Note:
565:     If `PetscSynchronizedPrintf()` and/or `PetscSynchronizedFPrintf()` are called with
566:     different MPI communicators there must be an intervening call to `PetscSynchronizedFlush()` between the calls with different MPI communicators.

568:     Fortran Note:
569:     Pass `PETSC_STDOUT` if the flush is for standard out; otherwise pass a value obtained from `PetscFOpen()`

571: .seealso: `PetscSynchronizedPrintf()`, `PetscFPrintf()`, `PetscPrintf()`, `PetscViewerASCIIPrintf()`,
572:           `PetscViewerASCIISynchronizedPrintf()`
573: @*/
574: PetscErrorCode PetscSynchronizedFlush(MPI_Comm comm, FILE *fd)
575: {
576:   PetscMPIInt rank, size, tag, i, j, n = 0, dummy = 0;
577:   char       *message;
578:   MPI_Status  status;

580:   PetscFunctionBegin;
581:   PetscCall(PetscCommDuplicate(comm, &comm, &tag));
582:   PetscCallMPI(MPI_Comm_rank(comm, &rank));
583:   PetscCallMPI(MPI_Comm_size(comm, &size));

585:   /* First processor waits for messages from all other processors */
586:   if (rank == 0) {
587:     if (!fd) fd = PETSC_STDOUT;
588:     for (i = 1; i < size; i++) {
589:       /* to prevent a flood of messages to process zero, request each message separately */
590:       PetscCallMPI(MPI_Send(&dummy, 1, MPI_INT, i, tag, comm));
591:       PetscCallMPI(MPI_Recv(&n, 1, MPI_INT, i, tag, comm, &status));
592:       for (j = 0; j < n; j++) {
593:         PetscMPIInt size = 0;

595:         PetscCallMPI(MPI_Recv(&size, 1, MPI_INT, i, tag, comm, &status));
596:         PetscCall(PetscMalloc1(size, &message));
597:         PetscCallMPI(MPI_Recv(message, size, MPI_CHAR, i, tag, comm, &status));
598:         PetscCall(PetscFPrintf(comm, fd, "%s", message));
599:         PetscCall(PetscFree(message));
600:       }
601:     }
602:   } else { /* other processors send queue to processor 0 */
603:     PrintfQueue next = petsc_printfqueuebase, previous;

605:     PetscCallMPI(MPI_Recv(&dummy, 1, MPI_INT, 0, tag, comm, &status));
606:     PetscCallMPI(MPI_Send(&petsc_printfqueuelength, 1, MPI_INT, 0, tag, comm));
607:     for (i = 0; i < petsc_printfqueuelength; i++) {
608:       PetscCallMPI(MPI_Send(&next->size, 1, MPI_INT, 0, tag, comm));
609:       PetscCallMPI(MPI_Send(next->string, next->size, MPI_CHAR, 0, tag, comm));
610:       previous = next;
611:       next     = next->next;
612:       PetscCall(PetscFree(previous->string));
613:       PetscCall(PetscFree(previous));
614:     }
615:     petsc_printfqueue       = NULL;
616:     petsc_printfqueuelength = 0;
617:   }
618:   PetscCall(PetscCommDestroy(&comm));
619:   PetscFunctionReturn(PETSC_SUCCESS);
620: }

622: /*@C
623:     PetscFPrintf - Prints to a file, only from the first
624:     processor in the communicator.

626:     Not Collective; No Fortran Support

628:     Input Parameters:
629: +   comm - the MPI communicator
630: .   fd - the file pointer
631: -   format - the usual `printf()` format string

633:     Level: intermediate

635:     Developer Note:
636:     This maybe, and is, called from PETSc error handlers and `PetscMallocValidate()` hence it does not use `PetscCallMPI()` which
637:     could recursively restart the malloc validation.

639: .seealso: `PetscPrintf()`, `PetscSynchronizedPrintf()`, `PetscViewerASCIIPrintf()`,
640:           `PetscViewerASCIISynchronizedPrintf()`, `PetscSynchronizedFlush()`, `PetscFFlush()`
641: @*/
642: PetscErrorCode PetscFPrintf(MPI_Comm comm, FILE *fd, const char format[], ...)
643: {
644:   va_list Argp;

646:   PetscFunctionBegin;
647:   va_start(Argp, format);
648:   PetscCall(PetscVFPrintf_Private(comm, fd, format, Argp));
649:   va_end(Argp);
650:   PetscFunctionReturn(PETSC_SUCCESS);
651: }

653: /*@C
654:     PetscPrintf - Prints to standard out, only from the first
655:     processor in the communicator. Calls from other processes are ignored.

657:     Not Collective

659:     Input Parameters:
660: +   comm - the communicator
661: -   format - the usual `printf()` format string

663:     Level: intermediate

665:     Note:
666:     Deprecated information: `PetscPrintf()` supports some format specifiers that are unique to PETSc.
667:     See the manual page for `PetscFormatConvert()` for details.

669:     Fortran Note:
670:     The call sequence is `PetscPrintf`(MPI_Comm, character(*), `PetscErrorCode` ierr) from Fortran.
671:     That is, you can only pass a single character string from Fortran.

673: .seealso: `PetscFPrintf()`, `PetscSynchronizedPrintf()`, `PetscFormatConvert()`, `PetscFFlush()`
674: @*/
675: PetscErrorCode PetscPrintf(MPI_Comm comm, const char format[], ...)
676: {
677:   va_list Argp;

679:   PetscFunctionBegin;
680:   va_start(Argp, format);
681:   PetscCall(PetscVFPrintf_Private(comm, PETSC_STDOUT, format, Argp));
682:   va_end(Argp);
683:   PetscFunctionReturn(PETSC_SUCCESS);
684: }

686: PetscErrorCode PetscHelpPrintfDefault(MPI_Comm comm, const char format[], ...)
687: {
688:   va_list Argp;

690:   PetscFunctionBegin;
691:   va_start(Argp, format);
692:   PetscCall(PetscVFPrintf_Private(comm, PETSC_STDOUT, format, Argp));
693:   va_end(Argp);
694:   PetscFunctionReturn(PETSC_SUCCESS);
695: }

697: /*@C
698:     PetscSynchronizedFGets - Several processors all get the same line from a file.

700:     Collective

702:     Input Parameters:
703: +   comm - the communicator
704: .   fd - the file pointer
705: -   len - the length of the output buffer

707:     Output Parameter:
708: .   string - the line read from the file, at end of file string[0] == 0

710:     Level: intermediate

712: .seealso: `PetscSynchronizedPrintf()`, `PetscSynchronizedFlush()`,
713:           `PetscFOpen()`, `PetscViewerASCIISynchronizedPrintf()`, `PetscViewerASCIIPrintf()`
714: @*/
715: PetscErrorCode PetscSynchronizedFGets(MPI_Comm comm, FILE *fp, size_t len, char string[])
716: {
717:   PetscMPIInt rank;

719:   PetscFunctionBegin;
720:   PetscCallMPI(MPI_Comm_rank(comm, &rank));
721:   if (rank != 0) PetscFunctionReturn(PETSC_SUCCESS);
722:   if (!fgets(string, len, fp)) {
723:     string[0] = 0;
724:     PetscCheck(feof(fp), PETSC_COMM_SELF, PETSC_ERR_FILE_READ, "Error reading from file: %d", errno);
725:   }
726:   PetscCallMPI(MPI_Bcast(string, len, MPI_BYTE, 0, comm));
727:   PetscFunctionReturn(PETSC_SUCCESS);
728: }

730: /*@C
731:      PetscFormatStrip - Takes a PETSc format string and removes all numerical modifiers to % operations

733:    Input Parameter:
734: .   format - the PETSc format string

736:  Level: developer

738: @*/
739: PetscErrorCode PetscFormatStrip(char *format)
740: {
741:   size_t loc1 = 0, loc2 = 0;

743:   PetscFunctionBegin;
744:   while (format[loc2]) {
745:     if (format[loc2] == '%') {
746:       format[loc1++] = format[loc2++];
747:       while (format[loc2] && ((format[loc2] >= '0' && format[loc2] <= '9') || format[loc2] == '.')) loc2++;
748:     }
749:     format[loc1++] = format[loc2++];
750:   }
751:   PetscFunctionReturn(PETSC_SUCCESS);
752: }

754: PetscErrorCode PetscFormatRealArray(char buf[], size_t len, const char *fmt, PetscInt n, const PetscReal x[])
755: {
756:   PetscInt i;
757:   size_t   left, count;
758:   char    *p;

760:   PetscFunctionBegin;
761:   for (i = 0, p = buf, left = len; i < n; i++) {
762:     PetscCall(PetscSNPrintfCount(p, left, fmt, &count, (double)x[i]));
763:     PetscCheck(count < left, PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Insufficient space in buffer");
764:     left -= count;
765:     p += count - 1;
766:     *p++ = ' ';
767:   }
768:   p[i ? 0 : -1] = 0;
769:   PetscFunctionReturn(PETSC_SUCCESS);
770: }