101 lines
3.0 KiB
C
101 lines
3.0 KiB
C
/* pcp.h -- Describes the format of a precompiled file
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Copyright (C) 1990 Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Structure allocated for every string in a precompiled file */
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typedef struct stringdef STRINGDEF;
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struct stringdef
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{
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U_CHAR *contents; /* String to include */
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int len; /* Its length */
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int writeflag; /* Whether we write this */
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int lineno; /* Linenumber of source file */
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U_CHAR *filename; /* Name of source file */
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STRINGDEF *chain; /* Global list of strings in natural order */
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int output_mark; /* Where in the output this goes */
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};
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typedef struct keydef KEYDEF;
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struct keydef
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{
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STRINGDEF *str;
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KEYDEF *chain;
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};
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/* Format: */
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/* A precompiled file starts with a series of #define and #undef
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statements:
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#define MAC DEF --- Indicates MAC must be defined with defn DEF
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#define MAC --- Indicates MAC must be defined with any defn
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#undef MAC --- Indicates MAC cannot be defined
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These preconditions must be true for a precompiled file to be used.
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The preconditions section is null terminated. */
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/* Then, there is a four byte number (in network byte order) which */
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/* indicates the number of strings the file contains. */
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/* Each string contains a STRINGDEF structure. The only component of */
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/* the STRINGDEF structure which is used is the lineno field, which */
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/* should hold the line number in the original header file. */
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/* Then follows the string, followed by a null. Then comes a four */
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/* byte number (again, in network byte order) indicating the number */
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/* of keys for this string. Each key is a KEYDEF structure, with */
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/* irrelevant contents, followed by the null-terminated string. */
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/* If the number of keys is 0, then there are no keys for the string, */
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/* in other words, the string will never be included. If the number */
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/* of keys is -1, this is a special flag indicating there are no keys */
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/* in the file, and the string is mandatory (that is, it must be */
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/* included regardless in the included output). */
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/* A file, then, looks like this:
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Precondition 1
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Precondition 2
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.
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.
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.
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<NUL>
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Number of strings
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STRINGDEF
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String . . . <NUL>
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Number of keys
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KEYDEF
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Key . . . <NUL>
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KEYDEF
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Key . . . <NUL>
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.
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.
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.
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STRINGDEF
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String . . . <NUL>
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Number of keys
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KEYDEF
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Key . . . <NUL>
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.
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.
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.
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.
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.
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.
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*/
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