2 * Copyright (c) 1992, The Regents of the University of California.
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6 * modification, are permitted provided that the following conditions
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15 * This product includes software developed by the University of
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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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33 * @(#)for.c 8.1 (Berkeley) 6/6/93
34 * $FreeBSD: src/usr.bin/make/for.c,v 1.10 1999/09/11 13:08:01 hoek Exp $
35 * $DragonFly: src/usr.bin/make/for.c,v 1.2 2003/06/17 04:29:28 dillon Exp $
40 * Functions to handle loops in a makefile.
43 * For_Eval Evaluate the loop in the passed line.
44 * For_Run Run accumulated loop
55 * For statements are of the form:
57 * .for <variable> in <varlist>
61 * The trick is to look for the matching end inside for for loop
62 * To do that, we count the current nesting level of the for loops.
63 * and the .endfor statements, accumulating all the statements between
64 * the initial .for loop and the matching .endfor;
65 * then we evaluate the for loop for each variable in the varlist.
68 static int forLevel = 0; /* Nesting level */
69 static char *forVar; /* Iteration variable */
70 static Buffer forBuf; /* Commands in loop */
71 static Lst forLst; /* List of items */
74 * State of a for loop.
77 Buffer buf; /* Unexpanded buffer */
78 char* var; /* Index name */
79 Lst lst; /* List of variables */
82 static int ForExec __P((ClientData, ClientData));
88 *-----------------------------------------------------------------------
90 * Evaluate the for loop in the passed line. The line
92 * .for <variable> in <varlist>
95 * TRUE: We found a for loop, or we are inside a for loop
96 * FALSE: We did not find a for loop, or we found the end of the for
102 *-----------------------------------------------------------------------
106 char *line; /* Line to parse */
108 char *ptr = line, *sub, *wrd;
109 int level; /* Level at which to report errors. */
118 for (ptr++; *ptr && isspace((unsigned char) *ptr); ptr++)
121 * If we are not in a for loop quickly determine if the statement is
124 if (ptr[0] != 'f' || ptr[1] != 'o' || ptr[2] != 'r' ||
125 !isspace((unsigned char) ptr[3]))
130 * we found a for loop, and now we are going to parse it.
132 while (*ptr && isspace((unsigned char) *ptr))
139 for (wrd = ptr; *ptr && !isspace((unsigned char) *ptr); ptr++)
141 Buf_AddBytes(buf, ptr - wrd, (Byte *) wrd);
143 forVar = (char *) Buf_GetAll(buf, &varlen);
145 Parse_Error (level, "missing variable in for");
148 Buf_Destroy(buf, FALSE);
150 while (*ptr && isspace((unsigned char) *ptr))
156 if (ptr[0] != 'i' || ptr[1] != 'n' ||
157 !isspace((unsigned char) ptr[2])) {
158 Parse_Error (level, "missing `in' in for");
164 while (*ptr && isspace((unsigned char) *ptr))
168 * Make a list with the remaining words
170 forLst = Lst_Init(FALSE);
172 sub = Var_Subst(NULL, ptr, VAR_GLOBAL, FALSE);
175 Buf_AddBytes(buf, ptr - wrd, (Byte *) wrd), \
176 Buf_AddByte(buf, (Byte) '\0'), \
177 Lst_AtFront(forLst, (ClientData) Buf_GetAll(buf, &varlen)), \
178 Buf_Destroy(buf, FALSE)
180 for (ptr = sub; *ptr && isspace((unsigned char) *ptr); ptr++)
183 for (wrd = ptr; *ptr; ptr++)
184 if (isspace((unsigned char) *ptr)) {
187 while (*ptr && isspace((unsigned char) *ptr))
192 (void) fprintf(stderr, "For: Iterator %s List %s\n", forVar, sub);
196 Buf_Destroy(buf, TRUE);
199 forBuf = Buf_Init(0);
203 else if (*ptr == '.') {
205 for (ptr++; *ptr && isspace((unsigned char) *ptr); ptr++)
208 if (strncmp(ptr, "endfor", 6) == 0 &&
209 (isspace((unsigned char) ptr[6]) || !ptr[6])) {
211 (void) fprintf(stderr, "For: end for %d\n", forLevel);
212 if (--forLevel < 0) {
213 Parse_Error (level, "for-less endfor");
217 else if (strncmp(ptr, "for", 3) == 0 &&
218 isspace((unsigned char) ptr[3])) {
221 (void) fprintf(stderr, "For: new loop %d\n", forLevel);
226 Buf_AddBytes(forBuf, strlen(line), (Byte *) line);
227 Buf_AddByte(forBuf, (Byte) '\n');
236 *-----------------------------------------------------------------------
238 * Expand the for loop for this index and push it in the Makefile
246 *-----------------------------------------------------------------------
253 char *name = (char *) namep;
254 For *arg = (For *) argp;
256 Var_Set(arg->var, name, VAR_GLOBAL);
258 (void) fprintf(stderr, "--- %s = %s\n", arg->var, name);
259 Parse_FromString(Var_Subst(arg->var, (char *) Buf_GetAll(arg->buf, &len),
261 Var_Delete(arg->var, VAR_GLOBAL);
268 *-----------------------------------------------------------------------
270 * Run the for loop, immitating the actions of an include file
278 *-----------------------------------------------------------------------
285 if (forVar == NULL || forBuf == NULL || forLst == NULL)
294 Lst_ForEach(arg.lst, ForExec, (ClientData) &arg);
296 free((Address)arg.var);
297 Lst_Destroy(arg.lst, (void (*) __P((ClientData))) free);
298 Buf_Destroy(arg.buf, TRUE);