/******************************************************************************
*
* Module Name: aslascii - ASCII detection and support routines
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2018, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include "aslcompiler.h"
#include <actables.h>
#include <acapps.h>
#define _COMPONENT ACPI_COMPILER
ACPI_MODULE_NAME ("aslascii")
/* Local prototypes */
static void
FlConsumeAnsiComment (
FILE *Handle,
ASL_FILE_STATUS *Status);
static void
FlConsumeNewComment (
FILE *Handle,
ASL_FILE_STATUS *Status);
/*******************************************************************************
*
* FUNCTION: FlIsFileAsciiSource
*
* PARAMETERS: Filename - Full input filename
* DisplayErrors - TRUE if error messages desired
*
* RETURN: Status
*
* DESCRIPTION: Verify that the input file is entirely ASCII. Ignores characters
* within comments. Note: does not handle nested comments and does
* not handle comment delimiters within string literals. However,
* on the rare chance this happens and an invalid character is
* missed, the parser will catch the error by failing in some
* spectactular manner.
*
******************************************************************************/
ACPI_STATUS
FlIsFileAsciiSource (
char *Filename,
BOOLEAN DisplayErrors)
{
UINT8 Byte;
UINT32 BadBytes = 0;
BOOLEAN OpeningComment = FALSE;
ASL_FILE_STATUS Status;
FILE *Handle;
/* Open file in text mode so file offset is always accurate */
Handle = fopen (Filename, "rb");
if (!Handle)
{
perror ("Could not open input file");
return (AE_ERROR);
}
Status.Line = 1;
Status.Offset = 0;
/* Read the entire file */
while (fread (&Byte, 1, 1, Handle) == 1)
{
/* Ignore comment fields (allow non-ascii within) */
if (OpeningComment)
{
/* Check for second comment open delimiter */
if (Byte == '*')
{
FlConsumeAnsiComment (Handle, &Status);
}
if (Byte == '/')
{
FlConsumeNewComment (Handle, &Status);
}
/* Reset */
OpeningComment = FALSE;
}
else if (Byte == '/')
{
OpeningComment = TRUE;
}
/* Check for an ASCII character */
if (!ACPI_IS_ASCII (Byte))
{
if ((BadBytes < 10) && (DisplayErrors))
{
AcpiOsPrintf (
"Found non-ASCII character in source text: "
"0x%2.2X in line %u, file offset 0x%2.2X\n",
Byte, Status.Line, Status.Offset);
}
BadBytes++;
}
/* Ensure character is either printable or a "space" char */
else if (!isprint (Byte) && !isspace (Byte))
{
if ((BadBytes < 10) && (DisplayErrors))
{
AcpiOsPrintf (
"Found invalid character in source text: "
"0x%2.2X in line %u, file offset 0x%2.2X\n",
Byte, Status.Line, Status.Offset);
}
BadBytes++;
}
/* Update line counter as necessary */
if (Byte == 0x0A)
{
Status.Line++;
}
Status.Offset++;
}
fclose (Handle);
/* Were there any non-ASCII characters in the file? */
if (BadBytes)
{
fprintf (stderr,
"File appears to be binary: found %u non-ASCII characters, disassembling\n",
BadBytes);
if (DisplayErrors)
{
AcpiOsPrintf (
"Total %u invalid characters found in input source text, "
"could be a binary file\n", BadBytes);
AslError (ASL_ERROR, ASL_MSG_NON_ASCII, NULL, Filename);
}
return (AE_BAD_CHARACTER);
}
/* File is OK (100% ASCII) */
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: FlConsumeAnsiComment
*
* PARAMETERS: Handle - Open input file
* Status - File current status struct
*
* RETURN: Number of lines consumed
*
* DESCRIPTION: Step over a normal slash-star type comment
*
******************************************************************************/
static void
FlConsumeAnsiComment (
FILE *Handle,
ASL_FILE_STATUS *Status)
{
UINT8 Byte;
BOOLEAN ClosingComment = FALSE;
while (fread (&Byte, 1, 1, Handle) == 1)
{
/* Scan until comment close is found */
if (ClosingComment)
{
if (Byte == '/')
{
Status->Offset++;
return;
}
if (Byte != '*')
{
/* Reset */
ClosingComment = FALSE;
}
}
else if (Byte == '*')
{
ClosingComment = TRUE;
}
/* Maintain line count */
if (Byte == 0x0A)
{
Status->Line++;
}
Status->Offset++;
}
}
/*******************************************************************************
*
* FUNCTION: FlConsumeNewComment
*
* PARAMETERS: Handle - Open input file
* Status - File current status struct
*
* RETURN: Number of lines consumed
*
* DESCRIPTION: Step over a slash-slash type of comment
*
******************************************************************************/
static void
FlConsumeNewComment (
FILE *Handle,
ASL_FILE_STATUS *Status)
{
UINT8 Byte;
while (fread (&Byte, 1, 1, Handle) == 1)
{
Status->Offset++;
/* Comment ends at newline */
if (Byte == 0x0A)
{
Status->Line++;
return;
}
}
}