- Added initial code for list command

config.m4

@@ -9,7 +9,7 @@ if test "$PHP_PHPDBG" != "no"; then
   AC_DEFINE(HAVE_PHPDBG, 1, [ ])
 
   PHP_PHPDBG_CFLAGS="-I$abc_srcdir"
-  PHP_PHPDBG_FILES="phpdbg.c phpdbg_prompt.c phpdbg_help.c phpdbg_bp.c phpdbg_opcode.c"
+  PHP_PHPDBG_FILES="phpdbg.c phpdbg_prompt.c phpdbg_help.c phpdbg_bp.c phpdbg_opcode.c phpdbg_list.c"
 
   PHP_SUBST(PHP_PHPDBG_CFLAGS)
   PHP_SUBST(PHP_PHPDBG_FILES)
@@ -27,7 +27,7 @@ if test "$PHP_PHPDBG" != "no"; then
                 \$(PHPDBG_EXTRA_LIBS) \
                 \$(ZEND_EXTRA_LIBS) \
          -o \$(BUILD_BINARY)"
-  
+
   PHP_SUBST(BUILD_BINARY)
   PHP_SUBST(BUILD_PHPDBG)
 fi

phpdbg_help.c

@@ -120,7 +120,6 @@ PHPDBG_HELP(quiet) /* {{{ */
     printf("Will silence OPLINE output, while\n");
     printf("\tphpdbg> quiet 0\n");
     printf("Will enable OPLINE output again\n");
-    
     return SUCCESS;
 } /* }}} */
 
@@ -132,3 +131,11 @@ PHPDBG_HELP(back) /* {{{ */
 	printf("Will limit the number of frames to 5, the default is no limit\n");
 	return SUCCESS;
 } /* }}} */
+
+PHPDBG_HELP(list) /* {{{ */
+{
+	printf("The list command displays N line from current context file.\n");
+	printf("\tphpdbg> list 2\n");
+	printf("Will print next 2 lines from the current file\n");
+	return SUCCESS;
+} /* }}} */

phpdbg_help.h

@@ -20,6 +20,7 @@
 #ifndef PHPDBG_HELP_H
 #define PHPDBG_HELP_H
 
+#include "TSRM.h"
 #include "phpdbg_prompt.h"
 
 /**
@@ -45,6 +46,7 @@ PHPDBG_HELP(clean);
 PHPDBG_HELP(clear);
 PHPDBG_HELP(back);
 PHPDBG_HELP(quiet);
+PHPDBG_HELP(list);
 
 /**
  * Commands
@@ -62,6 +64,7 @@ static const phpdbg_command_t phpdbg_help_commands[] = {
 	PHPDBG_HELP_D(clear,    "clearing breakpoints allows you to run code without interruption"),
 	PHPDBG_HELP_D(back,     "show debug backtrace information during execution"),
     PHPDBG_HELP_D(quiet,    "be quiet during execution"),
+	PHPDBG_HELP_D(list,     "list specified line"),
 	{NULL, 0, 0}
 };
 

phpdbg_list.c

@@ -0,0 +1,72 @@
+/*
+   +----------------------------------------------------------------------+
+   | PHP Version 5                                                        |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 1997-2013 The PHP Group                                |
+   +----------------------------------------------------------------------+
+   | This source file is subject to version 3.01 of the PHP license,      |
+   | that is bundled with this package in the file LICENSE, and is        |
+   | available through the world-wide-web at the following url:           |
+   | http://www.php.net/license/3_01.txt                                  |
+   | If you did not receive a copy of the PHP license and are unable to   |
+   | obtain it through the world-wide-web, please send a note to          |
+   | license@php.net so we can mail you a copy immediately.               |
+   +----------------------------------------------------------------------+
+   | Authors: Felipe Pena <felipe@php.net>                                |
+   | Authors: Joe Watkins <joe.watkins@live.co.uk>                        |
+   +----------------------------------------------------------------------+
+*/
+
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include "phpdbg_list.h"
+
+void phpdbg_list_file(const char *filename, long count, long offset) /* {{{ */
+{
+	unsigned char *mem, *pos, *last_pos, *end_pos;
+	struct stat st;
+	int fd, all_content = (count == 0);
+	unsigned int line = 0, displayed = 0;
+
+	if ((fd = open(filename, O_RDONLY)) == -1) {
+		printf("[Failed to open file to list]\n");
+		return;
+	}
+
+	fstat(fd, &st);
+
+	last_pos = mem = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
+	end_pos = mem + st.st_size;
+
+	while (1) {
+		pos = memchr(last_pos, '\n', end_pos - last_pos);
+
+		if (!pos) {
+			/* No more line breaks */
+			break;
+		}
+
+		++line;
+
+		if (!offset || offset <= line) {
+			/* Without offset, or offset reached */
+			printf("%05u: %.*s\n", line, (int)(pos - last_pos), last_pos);
+			++displayed;
+		}
+
+		last_pos = pos + 1;
+
+		if (!all_content && displayed == count) {
+			/* Reached max line to display */
+			break;
+		}
+	}
+
+	munmap(mem, st.st_size);
+	close(fd);
+
+} /* }}} */

phpdbg_list.h

@@ -0,0 +1,25 @@
+/*
+   +----------------------------------------------------------------------+
+   | PHP Version 5                                                        |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 1997-2013 The PHP Group                                |
+   +----------------------------------------------------------------------+
+   | This source file is subject to version 3.01 of the PHP license,      |
+   | that is bundled with this package in the file LICENSE, and is        |
+   | available through the world-wide-web at the following url:           |
+   | http://www.php.net/license/3_01.txt                                  |
+   | If you did not receive a copy of the PHP license and are unable to   |
+   | obtain it through the world-wide-web, please send a note to          |
+   | license@php.net so we can mail you a copy immediately.               |
+   +----------------------------------------------------------------------+
+   | Authors: Felipe Pena <felipe@php.net>                                |
+   | Authors: Joe Watkins <joe.watkins@live.co.uk>                        |
+   +----------------------------------------------------------------------+
+*/
+
+#ifndef PHPDBG_LIST_H
+#define PHPDBG_LIST_H
+
+void phpdbg_list_file(const char*, long, long);
+
+#endif /* PHPDBG_LIST_H */

phpdbg_prompt.c

@@ -422,6 +422,19 @@ static PHPDBG_COMMAND(quiet) { /* {{{ */
     return SUCCESS;
 } /* }}} */
 
+static PHPDBG_COMMAND(list) /* {{{ */
+{
+	long offset = 0, count = strtol(expr, NULL, 0);
+	const char *filename = PHPDBG_G(exec);
+
+	if (zend_is_executing(TSRMLS_C)) {
+		filename = zend_get_executed_filename(TSRMLS_C);
+		offset = zend_get_executed_lineno(TSRMLS_C);
+	}
+
+	phpdbg_list_file(filename, count, offset);
+} /* }}} */
+
 static const phpdbg_command_t phpdbg_prompt_commands[] = {
 	PHPDBG_COMMAND_D(exec,      "set execution context"),
 	PHPDBG_COMMAND_D(compile,   "attempt to pre-compile execution context"),
@@ -432,6 +445,7 @@ static const phpdbg_command_t phpdbg_prompt_commands[] = {
 	PHPDBG_COMMAND_D(print,     "print something"),
 	PHPDBG_COMMAND_D(break,     "set breakpoint"),
 	PHPDBG_COMMAND_D(back,      "show backtrace"),
+	PHPDBG_COMMAND_D(list,      "list specified line"),
 	PHPDBG_COMMAND_D(clean,     "clean the execution environment"),
 	PHPDBG_COMMAND_D(clear,     "clear breakpoints"),
 	PHPDBG_COMMAND_D(help,      "show help menu"),