1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/* RCS $Id: macparse.c,v 1.1.1.1.152.1 2006/07/17 03:10:57 vq Exp $
--
-- SYNOPSIS
-- Parse a macro definition
--
-- DESCRIPTION
-- This file contains the code that parses a macro definition
-- stored in a buffer. If the string in buffer is not a valid
-- macro definition the routie Parse_macro returns 0, otherwise it
-- returns 1 to indicate success.
--
-- AUTHOR
-- Dennis Vadura, dvadura@dmake.wticorp.com
--
-- WWW
-- http://dmake.wticorp.com/
--
-- COPYRIGHT
-- Copyright (c) 1996,1997 by WTI Corp. All rights reserved.
--
-- This program is NOT free software; you can redistribute it and/or
-- modify it under the terms of the Software License Agreement Provided
-- in the file <distribution-root>/readme/license.txt.
--
-- LOG
-- Use cvs log to obtain detailed change logs.
*/
#include "extern.h"
PUBLIC int
Parse_macro( buffer, flag )/*
=============================
Parse the string in buffer and define it as a macro if it is a valid macro.
Note especially the string .SETDIR= since it is an attribute, but looks a
lot like a macro definition. This would not be a problem if make used
white space as token separators, since this is not the case we must do
something about it. */
char *buffer;
int flag;
{
char *result; /* temporary pointer for strings */
TKSTR input; /* place to scan the buffer from */
HASHPTR hv; /* pointer to hash table value */
int operator; /* what macro operator do we have */
char *tok1; /* temporary place to keep a token */
char *tok2; /* temporary place to keep a token */
DB_ENTER( "Parse_macro" );
SET_TOKEN( &input, buffer );
tok1 = Get_token( &input, "=+:*!?", 0 );
operator=Macro_op(tok1);
if( operator ) {
Error( "No macro name" );
CLEAR_TOKEN( &input );
DB_RETURN( 1 );
}
tok1 = DmStrDup(tok1);
tok2 = Get_token( &input, "=+:*!?", 2 );
if( !(operator = Macro_op(tok2)) || !strcmp(tok1,".SETDIR") ) {
CLEAR_TOKEN( &input );
FREE(tok1);
DB_RETURN(0);
}
tok2 = Expand(tok1); FREE(tok1); tok1 = tok2;
tok2 = Get_token(&input, NIL( char ), FALSE);
/* Make sure we can force the assignment. */
if ( operator & M_OP_SI ) {
flag |= M_FORCE|M_MULTI;
operator &= ~M_OP_SI;
}
switch( operator ) {
case M_OP_PLCL:
tok2 = Expand( tok2 );
/* Fall thru */
case M_OP_PL:
/* Add to an existing macro, if it is not defined, though, then
* just define a new macro */
if( (hv = GET_MACRO(tok1)) == NIL(HASH) || hv->ht_value == NIL(char) )
Def_macro( tok1, tok2, flag );
else {
result = DmStrAdd( hv->ht_value, tok2, FALSE );
Def_macro( tok1, result, flag );
FREE( result );
}
if( operator == M_OP_PLCL ) FREE(tok2);
break;
case M_OP_DF:
/* *= */
/* internal default macros or initialized empty macros set M_INIT. */
if( (hv = GET_MACRO(tok1)) != NIL(HASH) && !(hv->ht_flag & M_INIT) )
break;
/* else FALLTHRU */
case M_OP_EQ:
Def_macro( tok1, tok2, flag );
break;
case M_OP_DFCL:
/* *:= */
/* internal default macros or initialized empty macros set M_INIT. */
if( (hv = GET_MACRO(tok1)) != NIL(HASH) && !(hv->ht_flag & M_INIT) )
break;
/* else FALLTHRU */
case M_OP_CL:
tok2 = Expand( tok2 );
Def_macro( tok1, tok2, M_EXPANDED | flag );
FREE( tok2 );
break;
case M_OP_CM:{
CELLPTR cp;
STRINGPTR sp;
if (flag & M_PUSH) {
Error("Nested conditional definition [%s ?= %s] ignored",
tok1, tok2);
}
else {
cp = Def_cell(tok1);
if (cp->ce_flag & F_MULTI) {
LINKPTR lp;
for(lp=cp->ce_prq; lp->cl_next; lp=lp->cl_next);
cp = lp->cl_prq;
}
TALLOC(sp,1,STRING);
sp->st_string = DmStrDup(tok2);
sp->st_next = cp->ce_cond;
cp->ce_cond = sp;
tok1 = NIL(char);
}
}
break;
}
if (tok1) {
if ( LastMacName != NIL(char) )
FREE( LastMacName );
LastMacName = tok1;
}
DB_RETURN( 1 );
}
PUBLIC int
Macro_op( op )/*
================
Check the passed in op string and map it to one of the macro operators */
char *op;
{
int ret = 0;
DB_ENTER( "macro_op" );
if ( *op == '!' ) {
ret = M_OP_SI;
op++;
}
switch( *op ) {
case '=': ret |= M_OP_EQ; break;
case ':': ret |= M_OP_CL; op++; break;
case '+':
op++;
if( *op == ':' ) {
ret |= M_OP_PLCL;
op++;
}
else {
ret |= M_OP_PL;
}
break;
case '*':
op++;
if( *op == ':' ) {
ret |= M_OP_DFCL;
op++;
}
else {
ret |= M_OP_DF;
}
break;
case '?':
ret |= M_OP_CM;
op++;
break;
}
if( *op != '=' )
ret = 0;
else {
op++;
if( *op != '\0' )
ret = 0;
}
DB_RETURN( ret );
}
|
