mirror of https://github.com/acidanthera/audk.git
666 lines
16 KiB
C
666 lines
16 KiB
C
/** @file
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Copyright (c) 2004 - 2008, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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ParseInf.c
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Abstract:
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This contains some useful functions for parsing INF files.
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--*/
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#include <assert.h>
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#include <string.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include "EfiUtilityMsgs.h"
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#include "ParseInf.h"
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CHAR8 *
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ReadLine (
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IN MEMORY_FILE *InputFile,
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IN OUT CHAR8 *InputBuffer,
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IN UINTN MaxLength
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)
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/*++
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Routine Description:
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This function reads a line, stripping any comments.
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The function reads a string from the input stream argument and stores it in
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the input string. ReadLine reads characters from the current file position
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to and including the first newline character, to the end of the stream, or
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until the number of characters read is equal to MaxLength - 1, whichever
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comes first. The newline character, if read, is replaced with a \0.
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Arguments:
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InputFile Memory file image.
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InputBuffer Buffer to read into, must be _MAX_PATH size.
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MaxLength The maximum size of the input buffer.
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Returns:
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NULL if error or EOF
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InputBuffer otherwise
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--*/
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{
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CHAR8 *CharPtr;
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CHAR8 *EndOfLine;
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UINTN CharsToCopy;
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//
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// Verify input parameters are not null
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//
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assert (InputBuffer);
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assert (InputFile->FileImage);
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assert (InputFile->Eof);
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assert (InputFile->CurrentFilePointer);
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//
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// Check for end of file condition
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//
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if (InputFile->CurrentFilePointer >= InputFile->Eof) {
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return NULL;
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}
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//
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// Find the next newline char
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//
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EndOfLine = strchr (InputFile->CurrentFilePointer, '\n');
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//
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// Determine the number of characters to copy.
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//
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if (EndOfLine == 0) {
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//
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// If no newline found, copy to the end of the file.
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//
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CharsToCopy = InputFile->Eof - InputFile->CurrentFilePointer;
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} else if (EndOfLine >= InputFile->Eof) {
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//
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// If the newline found was beyond the end of file, copy to the eof.
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//
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CharsToCopy = InputFile->Eof - InputFile->CurrentFilePointer;
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} else {
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//
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// Newline found in the file.
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//
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CharsToCopy = EndOfLine - InputFile->CurrentFilePointer;
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}
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//
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// If the end of line is too big for the current buffer, set it to the max
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// size of the buffer (leaving room for the \0.
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//
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if (CharsToCopy > MaxLength - 1) {
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CharsToCopy = MaxLength - 1;
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}
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//
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// Copy the line.
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//
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memcpy (InputBuffer, InputFile->CurrentFilePointer, CharsToCopy);
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//
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// Add the null termination over the 0x0D
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//
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if (InputBuffer[CharsToCopy - 1] == '\r') {
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InputBuffer[CharsToCopy - 1] = '\0';
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} else {
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InputBuffer[CharsToCopy] = '\0';
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}
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//
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// Increment the current file pointer (include the 0x0A)
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//
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InputFile->CurrentFilePointer += CharsToCopy + 1;
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//
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// Strip any comments
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//
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CharPtr = strstr (InputBuffer, "//");
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if (CharPtr != 0) {
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CharPtr[0] = 0;
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}
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//
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// Return the string
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//
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return InputBuffer;
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}
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BOOLEAN
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FindSection (
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IN MEMORY_FILE *InputFile,
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IN CHAR8 *Section
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)
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/*++
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Routine Description:
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This function parses a file from the beginning to find a section.
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The section string may be anywhere within a line.
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Arguments:
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InputFile Memory file image.
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Section Section to search for
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Returns:
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FALSE if error or EOF
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TRUE if section found
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--*/
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{
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CHAR8 InputBuffer[_MAX_PATH];
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CHAR8 *CurrentToken;
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//
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// Verify input is not NULL
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//
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assert (InputFile->FileImage);
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assert (InputFile->Eof);
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assert (InputFile->CurrentFilePointer);
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assert (Section);
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//
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// Rewind to beginning of file
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//
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InputFile->CurrentFilePointer = InputFile->FileImage;
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//
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// Read lines until the section is found
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//
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while (InputFile->CurrentFilePointer < InputFile->Eof) {
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//
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// Read a line
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//
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ReadLine (InputFile, InputBuffer, _MAX_PATH);
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//
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// Check if the section is found
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//
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CurrentToken = strstr (InputBuffer, Section);
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if (CurrentToken != NULL) {
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return TRUE;
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}
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}
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return FALSE;
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}
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EFI_STATUS
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FindToken (
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IN MEMORY_FILE *InputFile,
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IN CHAR8 *Section,
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IN CHAR8 *Token,
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IN UINTN Instance,
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OUT CHAR8 *Value
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)
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/*++
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Routine Description:
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Finds a token value given the section and token to search for.
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Arguments:
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InputFile Memory file image.
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Section The section to search for, a string within [].
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Token The token to search for, e.g. EFI_PEIM_RECOVERY, followed by an = in the INF file.
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Instance The instance of the token to search for. Zero is the first instance.
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Value The string that holds the value following the =. Must be _MAX_PATH in size.
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Returns:
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EFI_SUCCESS Value found.
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EFI_ABORTED Format error detected in INF file.
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EFI_INVALID_PARAMETER Input argument was null.
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EFI_LOAD_ERROR Error reading from the file.
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EFI_NOT_FOUND Section/Token/Value not found.
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--*/
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{
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CHAR8 InputBuffer[_MAX_PATH];
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CHAR8 *CurrentToken;
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BOOLEAN ParseError;
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BOOLEAN ReadError;
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UINTN Occurrance;
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//
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// Check input parameters
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//
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if (InputFile->FileImage == NULL ||
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InputFile->Eof == NULL ||
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InputFile->CurrentFilePointer == NULL ||
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Section == NULL ||
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strlen (Section) == 0 ||
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Token == NULL ||
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strlen (Token) == 0 ||
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Value == NULL
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) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Initialize error codes
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//
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ParseError = FALSE;
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ReadError = FALSE;
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//
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// Initialize our instance counter for the search token
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//
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Occurrance = 0;
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if (FindSection (InputFile, Section)) {
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//
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// Found the desired section, find and read the desired token
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//
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do {
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//
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// Read a line from the file
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//
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if (ReadLine (InputFile, InputBuffer, _MAX_PATH) == NULL) {
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//
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// Error reading from input file
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//
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ReadError = TRUE;
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break;
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}
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//
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// Get the first non-whitespace string
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//
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CurrentToken = strtok (InputBuffer, " \t\n");
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if (CurrentToken == NULL) {
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//
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// Whitespace line found (or comment) so continue
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//
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CurrentToken = InputBuffer;
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continue;
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}
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//
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// Make sure we have not reached the end of the current section
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//
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if (CurrentToken[0] == '[') {
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break;
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}
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//
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// Compare the current token with the desired token
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//
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if (strcmp (CurrentToken, Token) == 0) {
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//
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// Found it
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//
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//
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// Check if it is the correct instance
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//
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if (Instance == Occurrance) {
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//
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// Copy the contents following the =
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//
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CurrentToken = strtok (NULL, "= \t\n");
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if (CurrentToken == NULL) {
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//
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// Nothing found, parsing error
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//
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ParseError = TRUE;
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} else {
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//
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// Copy the current token to the output value
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//
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strcpy (Value, CurrentToken);
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return EFI_SUCCESS;
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}
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} else {
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//
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// Increment the occurrance found
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//
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Occurrance++;
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}
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}
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} while (
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!ParseError &&
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!ReadError &&
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InputFile->CurrentFilePointer < InputFile->Eof &&
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CurrentToken[0] != '[' &&
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Occurrance <= Instance
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);
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}
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//
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// Distinguish between read errors and INF file format errors.
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//
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if (ReadError) {
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return EFI_LOAD_ERROR;
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}
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if (ParseError) {
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return EFI_ABORTED;
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}
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return EFI_NOT_FOUND;
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}
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EFI_STATUS
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StringToGuid (
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IN CHAR8 *AsciiGuidBuffer,
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OUT EFI_GUID *GuidBuffer
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)
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/*++
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Routine Description:
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Converts a string to an EFI_GUID. The string must be in the
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xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx format.
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Arguments:
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AsciiGuidBuffer - pointer to ascii string
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GuidBuffer - pointer to destination Guid
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Returns:
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EFI_ABORTED Could not convert the string
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EFI_SUCCESS The string was successfully converted
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EFI_INVALID_PARAMETER Input parameter is invalid.
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--*/
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{
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INT32 Index;
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unsigned Data1;
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unsigned Data2;
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unsigned Data3;
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unsigned Data4[8];
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if (AsciiGuidBuffer == NULL || GuidBuffer == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Check Guid Format strictly xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
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//
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for (Index = 0; AsciiGuidBuffer[Index] != '\0' && Index < 37; Index ++) {
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if (Index == 8 || Index == 13 || Index == 18 || Index == 23) {
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if (AsciiGuidBuffer[Index] != '-') {
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break;
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}
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} else {
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if (((AsciiGuidBuffer[Index] >= '0') && (AsciiGuidBuffer[Index] <= '9')) ||
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((AsciiGuidBuffer[Index] >= 'a') && (AsciiGuidBuffer[Index] <= 'f')) ||
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((AsciiGuidBuffer[Index] >= 'A') && (AsciiGuidBuffer[Index] <= 'F'))) {
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continue;
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} else {
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break;
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}
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}
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}
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if (Index < 36 || AsciiGuidBuffer[36] != '\0') {
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Error (NULL, 0, 1003, "Invalid option value", "Incorrect GUID \"%s\"\n Correct Format \"xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx\"", AsciiGuidBuffer);
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return EFI_ABORTED;
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}
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//
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// Scan the guid string into the buffer
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//
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Index = sscanf (
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AsciiGuidBuffer,
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"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
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&Data1,
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&Data2,
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&Data3,
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&Data4[0],
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&Data4[1],
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&Data4[2],
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&Data4[3],
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&Data4[4],
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&Data4[5],
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&Data4[6],
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&Data4[7]
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);
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//
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// Verify the correct number of items were scanned.
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//
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if (Index != 11) {
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Error (NULL, 0, 1003, "Invalid option value", "Incorrect GUID \"%s\"\n Correct Format \"xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx\"", AsciiGuidBuffer);
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return EFI_ABORTED;
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}
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//
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// Copy the data into our GUID.
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//
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GuidBuffer->Data1 = (UINT32) Data1;
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GuidBuffer->Data2 = (UINT16) Data2;
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GuidBuffer->Data3 = (UINT16) Data3;
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GuidBuffer->Data4[0] = (UINT8) Data4[0];
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GuidBuffer->Data4[1] = (UINT8) Data4[1];
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GuidBuffer->Data4[2] = (UINT8) Data4[2];
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GuidBuffer->Data4[3] = (UINT8) Data4[3];
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GuidBuffer->Data4[4] = (UINT8) Data4[4];
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GuidBuffer->Data4[5] = (UINT8) Data4[5];
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GuidBuffer->Data4[6] = (UINT8) Data4[6];
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GuidBuffer->Data4[7] = (UINT8) Data4[7];
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return EFI_SUCCESS;
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}
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EFI_STATUS
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AsciiStringToUint64 (
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IN CONST CHAR8 *AsciiString,
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IN BOOLEAN IsHex,
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OUT UINT64 *ReturnValue
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)
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/*++
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Routine Description:
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Converts a null terminated ascii string that represents a number into a
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UINT64 value. A hex number may be preceeded by a 0x, but may not be
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succeeded by an h. A number without 0x or 0X is considered to be base 10
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unless the IsHex input is true.
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Arguments:
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AsciiString The string to convert.
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IsHex Force the string to be treated as a hex number.
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ReturnValue The return value.
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Returns:
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EFI_SUCCESS Number successfully converted.
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EFI_ABORTED Invalid character encountered.
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--*/
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{
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UINT8 Index;
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UINT64 HexNumber;
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CHAR8 CurrentChar;
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//
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// Initialize the result
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//
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HexNumber = 0;
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//
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// Check input paramter
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//
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if (AsciiString == NULL || ReturnValue == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Add each character to the result
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//
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if (IsHex || (AsciiString[0] == '0' && (AsciiString[1] == 'x' || AsciiString[1] == 'X'))) {
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//
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// Verify string is a hex number
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//
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for (Index = 2; Index < strlen (AsciiString); Index++) {
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if (isxdigit (AsciiString[Index]) == 0) {
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return EFI_ABORTED;
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}
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}
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//
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// Convert the hex string.
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//
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for (Index = 2; AsciiString[Index] != '\0'; Index++) {
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CurrentChar = AsciiString[Index];
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HexNumber *= 16;
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if (CurrentChar >= '0' && CurrentChar <= '9') {
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HexNumber += CurrentChar - '0';
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} else if (CurrentChar >= 'a' && CurrentChar <= 'f') {
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HexNumber += CurrentChar - 'a' + 10;
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} else if (CurrentChar >= 'A' && CurrentChar <= 'F') {
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HexNumber += CurrentChar - 'A' + 10;
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} else {
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//
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// Unrecognized character
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//
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return EFI_ABORTED;
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}
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}
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*ReturnValue = HexNumber;
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} else {
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//
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// Verify string is a number
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//
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for (Index = 0; Index < strlen (AsciiString); Index++) {
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if (isdigit (AsciiString[Index]) == 0) {
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return EFI_ABORTED;
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}
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}
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*ReturnValue = atol (AsciiString);
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}
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return EFI_SUCCESS;
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}
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CHAR8 *
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ReadLineInStream (
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IN FILE *InputFile,
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IN OUT CHAR8 *InputBuffer
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)
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/*++
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Routine Description:
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This function reads a line, stripping any comments.
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// BUGBUG: This is obsolete once genmake goes away...
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Arguments:
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InputFile Stream pointer.
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InputBuffer Buffer to read into, must be _MAX_PATH size.
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Returns:
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NULL if error or EOF
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InputBuffer otherwise
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--*/
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{
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CHAR8 *CharPtr;
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//
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// Verify input parameters are not null
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//
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assert (InputFile);
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assert (InputBuffer);
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//
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// Read a line
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//
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if (fgets (InputBuffer, _MAX_PATH, InputFile) == NULL) {
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return NULL;
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}
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//
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// Strip any comments
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//
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CharPtr = strstr (InputBuffer, "//");
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if (CharPtr != 0) {
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CharPtr[0] = 0;
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}
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CharPtr = strstr (InputBuffer, "#");
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if (CharPtr != 0) {
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CharPtr[0] = 0;
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}
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//
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// Return the string
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//
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return InputBuffer;
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}
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BOOLEAN
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FindSectionInStream (
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IN FILE *InputFile,
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IN CHAR8 *Section
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)
|
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/*++
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|
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Routine Description:
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|
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This function parses a stream file from the beginning to find a section.
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The section string may be anywhere within a line.
|
|
// BUGBUG: This is obsolete once genmake goes away...
|
|
|
|
Arguments:
|
|
|
|
InputFile Stream pointer.
|
|
Section Section to search for
|
|
|
|
Returns:
|
|
|
|
FALSE if error or EOF
|
|
TRUE if section found
|
|
|
|
--*/
|
|
{
|
|
CHAR8 InputBuffer[_MAX_PATH];
|
|
CHAR8 *CurrentToken;
|
|
|
|
//
|
|
// Verify input is not NULL
|
|
//
|
|
assert (InputFile);
|
|
assert (Section);
|
|
|
|
//
|
|
// Rewind to beginning of file
|
|
//
|
|
if (fseek (InputFile, 0, SEEK_SET) != 0) {
|
|
return FALSE;
|
|
}
|
|
//
|
|
// Read lines until the section is found
|
|
//
|
|
while (feof (InputFile) == 0) {
|
|
//
|
|
// Read a line
|
|
//
|
|
ReadLineInStream (InputFile, InputBuffer);
|
|
|
|
//
|
|
// Check if the section is found
|
|
//
|
|
CurrentToken = strstr (InputBuffer, Section);
|
|
if (CurrentToken != NULL) {
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
return FALSE;
|
|
}
|