2 * Copyright (c) 1992, The Regents of the University of California.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 static char sccsid[] = "@(#)for.c 8.1 (Berkeley) 6/6/93";
38 static const char rcsid[] =
39 "$FreeBSD: src/usr.bin/make/for.c,v 1.10 1999/09/11 13:08:01 hoek Exp $";
45 * Functions to handle loops in a makefile.
48 * For_Eval Evaluate the loop in the passed line.
49 * For_Run Run accumulated loop
60 * For statements are of the form:
62 * .for <variable> in <varlist>
66 * The trick is to look for the matching end inside for for loop
67 * To do that, we count the current nesting level of the for loops.
68 * and the .endfor statements, accumulating all the statements between
69 * the initial .for loop and the matching .endfor;
70 * then we evaluate the for loop for each variable in the varlist.
73 static int forLevel = 0; /* Nesting level */
74 static char *forVar; /* Iteration variable */
75 static Buffer forBuf; /* Commands in loop */
76 static Lst forLst; /* List of items */
79 * State of a for loop.
82 Buffer buf; /* Unexpanded buffer */
83 char* var; /* Index name */
84 Lst lst; /* List of variables */
87 static int ForExec __P((ClientData, ClientData));
93 *-----------------------------------------------------------------------
95 * Evaluate the for loop in the passed line. The line
97 * .for <variable> in <varlist>
100 * TRUE: We found a for loop, or we are inside a for loop
101 * FALSE: We did not find a for loop, or we found the end of the for
107 *-----------------------------------------------------------------------
111 char *line; /* Line to parse */
113 char *ptr = line, *sub, *wrd;
114 int level; /* Level at which to report errors. */
123 for (ptr++; *ptr && isspace((unsigned char) *ptr); ptr++)
126 * If we are not in a for loop quickly determine if the statement is
129 if (ptr[0] != 'f' || ptr[1] != 'o' || ptr[2] != 'r' ||
130 !isspace((unsigned char) ptr[3]))
135 * we found a for loop, and now we are going to parse it.
137 while (*ptr && isspace((unsigned char) *ptr))
144 for (wrd = ptr; *ptr && !isspace((unsigned char) *ptr); ptr++)
146 Buf_AddBytes(buf, ptr - wrd, (Byte *) wrd);
148 forVar = (char *) Buf_GetAll(buf, &varlen);
150 Parse_Error (level, "missing variable in for");
153 Buf_Destroy(buf, FALSE);
155 while (*ptr && isspace((unsigned char) *ptr))
161 if (ptr[0] != 'i' || ptr[1] != 'n' ||
162 !isspace((unsigned char) ptr[2])) {
163 Parse_Error (level, "missing `in' in for");
169 while (*ptr && isspace((unsigned char) *ptr))
173 * Make a list with the remaining words
175 forLst = Lst_Init(FALSE);
177 sub = Var_Subst(NULL, ptr, VAR_GLOBAL, FALSE);
180 Buf_AddBytes(buf, ptr - wrd, (Byte *) wrd), \
181 Buf_AddByte(buf, (Byte) '\0'), \
182 Lst_AtFront(forLst, (ClientData) Buf_GetAll(buf, &varlen)), \
183 Buf_Destroy(buf, FALSE)
185 for (ptr = sub; *ptr && isspace((unsigned char) *ptr); ptr++)
188 for (wrd = ptr; *ptr; ptr++)
189 if (isspace((unsigned char) *ptr)) {
192 while (*ptr && isspace((unsigned char) *ptr))
197 (void) fprintf(stderr, "For: Iterator %s List %s\n", forVar, sub);
201 Buf_Destroy(buf, TRUE);
204 forBuf = Buf_Init(0);
208 else if (*ptr == '.') {
210 for (ptr++; *ptr && isspace((unsigned char) *ptr); ptr++)
213 if (strncmp(ptr, "endfor", 6) == 0 &&
214 (isspace((unsigned char) ptr[6]) || !ptr[6])) {
216 (void) fprintf(stderr, "For: end for %d\n", forLevel);
217 if (--forLevel < 0) {
218 Parse_Error (level, "for-less endfor");
222 else if (strncmp(ptr, "for", 3) == 0 &&
223 isspace((unsigned char) ptr[3])) {
226 (void) fprintf(stderr, "For: new loop %d\n", forLevel);
231 Buf_AddBytes(forBuf, strlen(line), (Byte *) line);
232 Buf_AddByte(forBuf, (Byte) '\n');
241 *-----------------------------------------------------------------------
243 * Expand the for loop for this index and push it in the Makefile
251 *-----------------------------------------------------------------------
258 char *name = (char *) namep;
259 For *arg = (For *) argp;
261 Var_Set(arg->var, name, VAR_GLOBAL);
263 (void) fprintf(stderr, "--- %s = %s\n", arg->var, name);
264 Parse_FromString(Var_Subst(arg->var, (char *) Buf_GetAll(arg->buf, &len),
266 Var_Delete(arg->var, VAR_GLOBAL);
273 *-----------------------------------------------------------------------
275 * Run the for loop, immitating the actions of an include file
283 *-----------------------------------------------------------------------
290 if (forVar == NULL || forBuf == NULL || forLst == NULL)
299 Lst_ForEach(arg.lst, ForExec, (ClientData) &arg);
301 free((Address)arg.var);
302 Lst_Destroy(arg.lst, (void (*) __P((ClientData))) free);
303 Buf_Destroy(arg.buf, TRUE);