diff options
Diffstat (limited to 'src/callproc.c')
| -rw-r--r-- | src/callproc.c | 27 |
1 files changed, 12 insertions, 15 deletions
diff --git a/src/callproc.c b/src/callproc.c index c410b5a121b..524f6a6a078 100644 --- a/src/callproc.c +++ b/src/callproc.c @@ -218,9 +218,10 @@ usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */) int fd[2]; int filefd; register int pid; - char buf[16384]; - char *bufptr = buf; - int bufsize = sizeof buf; +#define CALLPROC_BUFFER_SIZE_MIN (16 * 1024) +#define CALLPROC_BUFFER_SIZE_MAX (4 * CALLPROC_BUFFER_SIZE_MIN) + char buf[CALLPROC_BUFFER_SIZE_MAX]; + int bufsize = CALLPROC_BUFFER_SIZE_MIN; int count = SPECPDL_INDEX (); register const unsigned char **new_argv @@ -753,7 +754,7 @@ usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */) nread = carryover; while (nread < bufsize - 1024) { - int this_read = emacs_read (fd[0], bufptr + nread, + int this_read = emacs_read (fd[0], buf + nread, bufsize - nread); if (this_read < 0) @@ -779,7 +780,7 @@ usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */) { if (NILP (current_buffer->enable_multibyte_characters) && ! CODING_MAY_REQUIRE_DECODING (&process_coding)) - insert_1_both (bufptr, nread, nread, 0, 1, 0); + insert_1_both (buf, nread, nread, 0, 1, 0); else { /* We have to decode the input. */ Lisp_Object buf; @@ -826,17 +827,13 @@ usage: (call-process PROGRAM &optional INFILE BUFFER DISPLAY &rest ARGS) */) if (process_coding.mode & CODING_MODE_LAST_BLOCK) break; +#if (CALLPROC_BUFFER_SIZE_MIN != CALLPROC_BUFFER_SIZE_MAX) /* Make the buffer bigger as we continue to read more data, - but not past 64k. */ - if (bufsize < 64 * 1024 && total_read > 32 * bufsize) - { - char *tempptr; - bufsize *= 2; - - tempptr = (char *) alloca (bufsize); - bcopy (bufptr, tempptr, bufsize / 2); - bufptr = tempptr; - } + but not past CALLPROC_BUFFER_SIZE_MAX. */ + if (bufsize < CALLPROC_BUFFER_SIZE_MAX && total_read > 32 * bufsize) + if ((bufsize *= 2) > CALLPROC_BUFFER_SIZE_MAX) + bufsize = CALLPROC_BUFFER_SIZE_MAX; +#endif if (display_p) { |