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22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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32 * @(#)for.c 8.1 (Berkeley) 6/6/93
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
40 * Functions to handle loops in a makefile.
43 * For_Eval Evaluate the loop in the passed line.
44 * For_Run Run accumulated loop
63 * For statements are of the form:
65 * .for <variable> in <varlist>
69 * The trick is to look for the matching end inside for for loop
70 * To do that, we count the current nesting level of the for loops.
71 * and the .endfor statements, accumulating all the statements between
72 * the initial .for loop and the matching .endfor;
73 * then we evaluate the for loop for each variable in the varlist.
76 static int forLevel = 0; /* Nesting level */
77 static char *forVar; /* Iteration variable */
78 static Buffer *forBuf; /* Commands in loop */
79 static Lst forLst; /* List of items */
83 * Evaluate the for loop in the passed line. The line
85 * .for <variable> in <varlist>
86 * The line pointer points just behind the for.
90 * FALSE: Syntax error.
104 * Skip space between for and the variable.
106 for (ptr++; *ptr && isspace((u_char)*ptr); ptr++)
112 for (wrd = ptr; *ptr && !isspace((u_char)*ptr); ptr++)
116 Buf_AppendRange(buf, wrd, ptr);
117 forVar = Buf_GetAll(buf, &varlen);
120 Buf_Destroy(buf, TRUE);
121 Parse_Error(PARSE_FATAL, "missing variable in for");
124 Buf_Destroy(buf, FALSE);
129 while (*ptr && isspace((u_char)*ptr))
135 if (ptr[0] != 'i' || ptr[1] != 'n' || !isspace((u_char)ptr[2])) {
137 Parse_Error(PARSE_FATAL, "missing `in' in for");
138 fprintf(stderr, "%s\n", ptr);
146 while (*ptr && isspace((u_char)*ptr))
150 * Make a list with the remaining words
151 * XXX should use brk_string here.
153 sub = Buf_Peel(Var_Subst(ptr, VAR_CMD, FALSE));
154 for (ptr = sub; *ptr != '\0' && isspace((u_char)*ptr); ptr++)
159 for (wrd = ptr; *ptr != '\0'; ptr++) {
160 if (isspace((u_char)*ptr)) {
161 Buf_AppendRange(buf, wrd, ptr);
162 Lst_AtFront(&forLst, Buf_Peel(buf));
165 while (*ptr != '\0' && isspace((u_char)*ptr))
170 DEBUGF(FOR, ("For: Iterator %s List %s\n", forVar, sub));
173 Buf_AppendRange(buf, wrd, ptr);
174 Lst_AtFront(&forLst, Buf_Peel(buf));
176 Buf_Destroy(buf, TRUE);
180 forBuf = Buf_Init(0);
187 * Eat a line of the .for body looking for embedded .for loops
199 * Need to check for 'endfor' and 'for' to find the end
200 * of our loop or to find embedded for loops.
202 for (ptr++; *ptr != '\0' && isspace((u_char)*ptr); ptr++)
205 /* XXX the isspace is wrong */
206 if (strncmp(ptr, "endfor", 6) == 0 &&
207 (isspace((u_char)ptr[6]) || ptr[6] == '\0')) {
208 DEBUGF(FOR, ("For: end for %d\n", forLevel));
210 /* should not be here */
215 } else if (strncmp(ptr, "for", 3) == 0 &&
216 isspace((u_char)ptr[3])) {
218 DEBUGF(FOR, ("For: new loop %d\n", forLevel));
224 * Still in loop - append the line
226 Buf_Append(forBuf, line);
227 Buf_AddByte(forBuf, (Byte)'\n');
235 *-----------------------------------------------------------------------
237 * Run the for loop, immitating the actions of an include file
243 * The values of the variables forLst, forVar and forBuf are freed.
245 *-----------------------------------------------------------------------
250 Lst values; /* list of values for the variable */
251 char *var; /* the variable's name */
252 Buffer *buf; /* the contents of the for loop */
253 const char *val; /* current value of loop variable */
257 if (forVar == NULL || forBuf == NULL)
260 /* copy the global variables to have them free for embedded fors */
264 Lst_Concat(&values, &forLst, LST_CONCLINK);
269 LST_FOREACH(ln, &values) {
271 Var_Set(var, val, VAR_GLOBAL);
273 DEBUGF(FOR, ("--- %s = %s\n", var, val));
274 str = Buf_Peel(Var_SubstOnly(var, Buf_Data(buf), FALSE));
276 Parse_FromString(str, lineno);
277 Var_Delete(var, VAR_GLOBAL);
281 Lst_Destroy(&values, free);
282 Buf_Destroy(buf, TRUE);