50 lines
1.6 KiB
Text
50 lines
1.6 KiB
Text
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* $Id$ */
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/* DEFINITIONS FOR THE MACRO REPLACEMENT ROUTINES */
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struct repl {
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struct repl *next;
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struct idf *r_idf; /* name of the macro */
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struct args *r_args; /* replacement parameters */
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int r_level; /* level of insertion */
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int r_size; /* current size of replacement buffer */
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char *r_ptr; /* replacement text index pointer */
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char *r_text; /* replacement text */
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};
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/* ALLOCDEF "repl" 4 */
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#define NO_REPL (struct repl *)0
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/* The implementation of the ## operator is currently very clumsy.
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When the the ## operator is used the arguments are taken from
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the raw buffer; this buffer contains a precise copy of the
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original argument. The fully expanded copy is in the arg buffer.
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The two copies are here explicitely because:
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#define ABC f()
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#define ABCD 2
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#define g(x, y) x ## y + h(x)
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g(ABC, D);
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In this case we need two copies: one raw copy for the pasting
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operator, and an expanded one as argument for h().
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*/
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struct args {
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char *a_expptr; /* expanded argument index pointer */
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char *a_expbuf; /* expanded argument buffer pointer */
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int a_expsize; /* current size of expanded buffer */
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char *a_expvec[NPARAMS]; /* expanded argument vector */
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char *a_rawptr; /* raw argument index pointer */
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char *a_rawbuf; /* raw argument buffer pointer */
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int a_rawsize; /* current size of raw buffer */
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char *a_rawvec[NPARAMS]; /* raw argument vector */
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};
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/* ALLOCDEF "args" 2 */
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#define NO_ARGS (struct args *)0
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