53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
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/* PREPROCESSOR: DEFINITION OF MACRO DESCRIPTOR */
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/* The flags of the mc_flag field of the macro structure. Note that
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these flags can be set simultaneously.
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*/
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#define NOFLAG 0 /* no special flags */
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#define FUNC 01 /* function attached */
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#define NOREPLACE 02 /* don't replace */
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#define FORMALP 0200 /* mask for creating macro formal parameter */
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/* The macro descriptor is very simple, except the fact that the
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mc_text, which points to the replacement text, contains the
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non-ascii characters \201, \202, etc, indicating the position of a
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formal parameter in this text.
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*/
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struct macro {
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struct macro *next;
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char * mc_text; /* the replacement text */
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int mc_nps; /* number of formal parameters */
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int mc_length; /* length of replacement text */
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int mc_count; /* # of "concurrent" invocations*/
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char mc_flag; /* marking this macro */
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};
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/* allocation definitions of struct macro */
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extern char *st_alloc();
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extern struct macro *h_macro;
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#ifdef DEBUG
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extern int cnt_macro;
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extern char *std_alloc();
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#define new_macro() ((struct macro *) std_alloc((char **)&h_macro, sizeof(struct macro), 20, &cnt_macro))
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#else
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#define new_macro() ((struct macro *) st_alloc((char **)&h_macro, sizeof(struct macro), 20))
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#endif
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#define free_macro(p) st_free(p, &h_macro, sizeof(struct macro))
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/* `token' numbers of keywords of command-line processor
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*/
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#define K_UNKNOWN 0
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#define K_DEFINE 1
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#define K_ELIF 2
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#define K_ELSE 3
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#define K_ENDIF 4
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#define K_IF 5
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#define K_IFDEF 6
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#define K_IFNDEF 7
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#define K_INCLUDE 8
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#define K_LINE 9
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#define K_UNDEF 10
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