EXTERN int exp_default_match_max;
+EXTERN int exp_default_match_max_changed;
EXTERN int exp_default_parity;
EXTERN int exp_default_rm_nulls;
@@ -97,6 +98,7 @@
int msize; /* # of bytes that buffer can hold (max) */
int umsize; /* # of bytes (min) that is guaranteed to match */
/* this comes from match_max command */
+ int umsize_changed; /* is umsize changed by user? */
int printed; /* # of bytes written to stdout (if logging on) */
/* but not actually returned via a match yet */
int echoed; /* additional # of bytes (beyond "printed" above) */
--- expect-5.38/expect.c.orig 2002-04-07 19:00:33.000000000 -0400
+++ expect-5.38/expect.c 2004-01-23 18:35:47.000000000 -0500
@@ -41,8 +41,17 @@
#include "tcldbg.h"
#endif
+/* The initial length is 2000. We increment it by 2000. The maximum
+ is 8MB (0x800000). */
+#define EXP_MATCH_MAX 2000
+#define EXP_MATCH_INC 2000
+#define EXP_MATCH_STEP_LIMIT 0x700000
+#define EXP_MATCH_LIMIT 0x800000
+#define EXP_MATCH_LIMIT_QUOTE "0x800000"
+
/* initial length of strings that we can guarantee patterns can match */
-int exp_default_match_max = 2000;
+int exp_default_match_max = EXP_MATCH_MAX;
+int exp_default_match_max_changed = 0;
#define INIT_EXPECT_TIMEOUT_LIT "10" /* seconds */
#define INIT_EXPECT_TIMEOUT 10 /* seconds */
int exp_default_parity = TRUE;
@@ -1618,6 +1627,76 @@
return newsize;
}
+/* returns # of bytes until we see a newline at the end or EOF. */
+/*ARGSUSED*/
+static int
+expReadNewLine(interp,esPtr,save_flags) /* INTL */
+Tcl_Interp *interp;
+ExpState *esPtr;
+int save_flags;
+{
+ int size;
+ int exp_size;
+ int full_size;
+ int count;
+ char *str;
+
+ count = 0;
+ for (;;) {
+ exp_size = expSizeGet(esPtr);
+
+ /* When we reach the limit, we will only read one char at a
+ time. */
+ if (esPtr->umsize >= EXP_MATCH_STEP_LIMIT)
+ size = TCL_UTF_MAX;
+ else
+ size = exp_size;
+
+ if (exp_size + TCL_UTF_MAX >= esPtr->msize) {
+ if (esPtr->umsize >= EXP_MATCH_LIMIT) {
+ expDiagLogU("WARNING: interact buffer is full. probably your program\r\n");
+ expDiagLogU("is not interactive or has a very long output line. The\r\n");
+ expDiagLogU("current limit is " EXP_MATCH_LIMIT_QUOTE ".\r\n");
+ expDiagLogU("Dumping first half of buffer in order to continue\r\n");
+ expDiagLogU("Recommend you enlarge the buffer.\r\n");
+ exp_buffer_shuffle(interp,esPtr,save_flags,EXPECT_OUT,"expect");
+ return count;
+ }
+ else {
+ esPtr->umsize += EXP_MATCH_INC;
+ expAdjust(esPtr);
+ }
+ }
+
+ full_size = esPtr->msize - (size / TCL_UTF_MAX);
+ size = Tcl_ReadChars(esPtr->channel,
+ esPtr->buffer,
+ full_size,
+ 1 /* append */);
+ if (size > 0) {
+ count += size;
+ /* We try again if there are more to read and we haven't
+ seen a newline at the end. */
+ if (size == full_size) {
+ str = Tcl_GetStringFromObj(esPtr->buffer, &size);
+ if (str[size - 1] != '\n')
+ continue;
+ }
+ }
+ else {
+ /* It is even trickier. We got an error from read. We have
+ to recover from it. Let's make sure the size of
+ buffer is correct. It can be corrupted. */
+ str = Tcl_GetString(esPtr->buffer);
+ Tcl_SetObjLength(esPtr->buffer, strlen(str));
+ }
+
+ break;
+ }
+
+ return count;
+}
+
/* returns # of bytes read or (non-positive) error of form EXP_XXX */
/* returns 0 for end of file */
/* If timeout is non-zero, set an alarm before doing the read, else assume */
@@ -1632,6 +1711,8 @@
{
int cc = EXP_TIMEOUT;
int size = expSizeGet(esPtr);
+ int full_size;
+ int count;
-
+ /* FIXME: If we ask less than what is available in the tcl buffer
+ when tcl has seen EOF, we will throw away the remaining data
+ since the next read will get EOF. Since expect is line-oriented,
+ we exand our buffer to get EOF or the next newline at the end of
+ the input buffer. I don't know if it is the right fix. H.J. */
+ count = 0;
+ full_size = esPtr->msize - (size / TCL_UTF_MAX);
cc = Tcl_ReadChars(esPtr->channel,
- esPtr->buffer,
- esPtr->msize - (size / TCL_UTF_MAX),
- 1 /* append */);
+ esPtr->buffer,
+ full_size,
+ 1 /* append */);
+ if (cc > 0) {
+ count += cc;
+ /* It gets very tricky. There are more to read. We will expand
+ our buffer and get EOF or a newline at the end unless the
+ buffer length has been changed. */
+ if (cc == full_size) {
+ char *str;
+ str = Tcl_GetStringFromObj(esPtr->buffer, &size);
+ if (str[size - 1] != '\n') {
+ if (esPtr->umsize_changed) {
+ char buf[20]; /* big enough for 64bit int in hex. */
+ snprintf(buf,sizeof(buf),"0x%x", esPtr->umsize);
+ expDiagLogU("WARNING: interact buffer is not large enough to hold\r\n");
+ expDiagLogU("all output. probably your program is not interactive or\r\n");
+ expDiagLogU("has a very long output line. The current limit is ");
+ expDiagLogU(buf);
+ expDiagLogU(".\r\n");
+ }
+ else {
+ cc = expReadNewLine(interp,esPtr,save_flags);
+ if (cc > 0)
+ count += cc;
+ }
+ }
+ }
+ }
i_read_errno = errno;
