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/* pcp.h -- Describes the format of a precompiled file
Copyright (C) 1990 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
/* Structure allocated for every string in a precompiled file */
typedef struct stringdef STRINGDEF;
struct stringdef
{
U_CHAR *contents; /* String to include */
int len; /* Its length */
int writeflag; /* Whether we write this */
int lineno; /* Linenumber of source file */
U_CHAR *filename; /* Name of source file */
STRINGDEF *chain; /* Global list of strings in natural order */
int output_mark; /* Where in the output this goes */
};
typedef struct keydef KEYDEF;
struct keydef
{
STRINGDEF *str;
KEYDEF *chain;
};
/* Format: */
/* A precompiled file starts with a series of #define and #undef
statements:
#define MAC DEF --- Indicates MAC must be defined with defn DEF
#define MAC --- Indicates MAC must be defined with any defn
#undef MAC --- Indicates MAC cannot be defined
These preconditions must be true for a precompiled file to be used.
The preconditions section is null terminated. */
/* Then, there is a four byte number (in network byte order) which */
/* indicates the number of strings the file contains. */
/* Each string contains a STRINGDEF structure. The only component of */
/* the STRINGDEF structure which is used is the lineno field, which */
/* should hold the line number in the original header file. */
/* Then follows the string, followed by a null. Then comes a four */
/* byte number (again, in network byte order) indicating the number */
/* of keys for this string. Each key is a KEYDEF structure, with */
/* irrelevant contents, followed by the null-terminated string. */
/* If the number of keys is 0, then there are no keys for the string, */
/* in other words, the string will never be included. If the number */
/* of keys is -1, this is a special flag indicating there are no keys */
/* in the file, and the string is mandatory (that is, it must be */
/* included regardless in the included output). */
/* A file, then, looks like this:
Precondition 1
Precondition 2
.
.
.
<NUL>
Number of strings
STRINGDEF
String . . . <NUL>
Number of keys
KEYDEF
Key . . . <NUL>
KEYDEF
Key . . . <NUL>
.
.
.
STRINGDEF
String . . . <NUL>
Number of keys
KEYDEF
Key . . . <NUL>
.
.
.
.
.
.
*/
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