Fix https://github.com/krakjoe/phpdbg/issues/91

Enable edit feature when build with libedit.

Notice: coloured prompt only enable with READLINE

sapi/phpdbg/config.m4

@@ -21,7 +21,7 @@ if test "$PHP_PHPDBG" != "no"; then
   PHP_PHPDBG_CFLAGS="-D_GNU_SOURCE"
   PHP_PHPDBG_FILES="phpdbg.c phpdbg_parser.c phpdbg_lexer.c phpdbg_prompt.c phpdbg_help.c phpdbg_break.c phpdbg_print.c phpdbg_bp.c phpdbg_opcode.c phpdbg_list.c phpdbg_utils.c phpdbg_info.c phpdbg_cmd.c phpdbg_set.c phpdbg_frame.c phpdbg_watch.c phpdbg_btree.c"
 
-  if test "$PHP_READLINE" != "no"; then
+  if test "$PHP_READLINE" != "no" -o  "$PHP_LIBEDIT" != "no"; then
   	PHPDBG_EXTRA_LIBS="$PHP_READLINE_LIBS"
   fi
   

sapi/phpdbg/phpdbg.h

@@ -64,7 +64,7 @@
 # include "TSRM.h"
 #endif
 
-#ifdef HAVE_LIBREADLINE
+#if defined(HAVE_LIBREADLINE) || defined(HAVE_LIBEDIT)
 #   include <readline/readline.h>
 #   include <readline/history.h>
 #endif

sapi/phpdbg/phpdbg_cmd.c

@@ -792,7 +792,7 @@ PHPDBG_API int phpdbg_stack_execute(phpdbg_param_t *stack, char **why TSRMLS_DC)
 PHPDBG_API char* phpdbg_read_input(char *buffered TSRMLS_DC) /* {{{ */
 {
 	char *cmd = NULL;
-#ifndef HAVE_LIBREADLINE
+#if !defined(HAVE_LIBREADLINE) && !defined(HAVE_LIBEDIT)
 	char buf[PHPDBG_MAX_CMD];
 #endif
 	char *buffer = NULL;
@@ -811,7 +811,7 @@ disconnect:
 				return NULL;
 			}
 
-#ifndef HAVE_LIBREADLINE
+#if !defined(HAVE_LIBREADLINE) && !defined(HAVE_LIBEDIT)
 			if (!(PHPDBG_G(flags) & PHPDBG_IS_REMOTE)) {
 				if (!phpdbg_write("%s", phpdbg_get_prompt(TSRMLS_C))) {
 					goto disconnect;
@@ -850,7 +850,7 @@ readline:
 		
 		buffer = estrdup(cmd);
 
-#ifdef HAVE_LIBREADLINE
+#if defined(HAVE_LIBREADLINE) || defined(HAVE_LIBEDIT)
 		if (!buffered && cmd &&
 			!(PHPDBG_G(flags) & PHPDBG_IS_REMOTE)) {
 			free(cmd);

sapi/phpdbg/phpdbg_prompt.c

@@ -732,6 +732,11 @@ PHPDBG_COMMAND(print) /* {{{ */
 #else
 	phpdbg_writeln("Readline\tno");
 #endif
+#ifdef HAVE_LIBEDIT
+	phpdbg_writeln("Libedit\t\tyes");
+#else
+	phpdbg_writeln("Libedit\t\tno");
+#endif
 
 	phpdbg_writeln("Exec\t\t%s", PHPDBG_G(exec) ? PHPDBG_G(exec) : "none");
 	phpdbg_writeln("Compiled\t%s", PHPDBG_G(ops) ? "yes" : "no");

sapi/phpdbg/phpdbg_utils.c

@@ -400,12 +400,16 @@ PHPDBG_API const char *phpdbg_get_prompt(TSRMLS_D) /* {{{ */
 	}
 
 	/* create cached prompt */
+#ifdef HAVE_LIBREADLINE
+	/* TODO: libedit doesn't seems to support coloured prompt */
 	if ((PHPDBG_G(flags) & PHPDBG_IS_COLOURED)) {
 		asprintf(
 			&PHPDBG_G(prompt)[1], "\033[%sm%s\033[0m ",
 			PHPDBG_G(colors)[PHPDBG_COLOR_PROMPT]->code,
 			PHPDBG_G(prompt)[0]);
-	} else {
+	} else
+#endif
+	{
 		asprintf(
 			&PHPDBG_G(prompt)[1], "%s ",
 			PHPDBG_G(prompt)[0]);