From 95bef729766af92a2bde4dcc8eff56c2924b0d9f Mon Sep 17 00:00:00 2001 From: rgrimes Date: Fri, 27 May 1994 12:33:43 +0000 Subject: BSD 4.4 Lite Usr.bin Sources --- usr.bin/make/for.c | 296 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 296 insertions(+) create mode 100644 usr.bin/make/for.c (limited to 'usr.bin/make/for.c') diff --git a/usr.bin/make/for.c b/usr.bin/make/for.c new file mode 100644 index 0000000..e16d5ff --- /dev/null +++ b/usr.bin/make/for.c @@ -0,0 +1,296 @@ +/* + * Copyright (c) 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Christos Zoulas. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)for.c 8.1 (Berkeley) 6/6/93"; +#endif /* not lint */ + +/*- + * for.c -- + * Functions to handle loops in a makefile. + * + * Interface: + * For_Eval Evaluate the loop in the passed line. + * For_Run Run accumulated loop + * + */ + +#include +#include "make.h" +#include "hash.h" +#include "dir.h" +#include "buf.h" + +/* + * For statements are of the form: + * + * .for in + * ... + * .endfor + * + * The trick is to look for the matching end inside for for loop + * To do that, we count the current nesting level of the for loops. + * and the .endfor statements, accumulating all the statements between + * the initial .for loop and the matching .endfor; + * then we evaluate the for loop for each variable in the varlist. + */ + +static int forLevel = 0; /* Nesting level */ +static char *forVar; /* Iteration variable */ +static Buffer forBuf; /* Commands in loop */ +static Lst forLst; /* List of items */ + +/* + * State of a for loop. + */ +struct For { + Buffer buf; /* Unexpanded buffer */ + char* var; /* Index name */ + Lst lst; /* List of variables */ +}; + +static int ForExec __P((char *, struct For *)); + + + + +/*- + *----------------------------------------------------------------------- + * For_Eval -- + * Evaluate the for loop in the passed line. The line + * looks like this: + * .for in + * + * Results: + * TRUE: We found a for loop, or we are inside a for loop + * FALSE: We did not find a for loop, or we found the end of the for + * for loop. + * + * Side Effects: + * None. + * + *----------------------------------------------------------------------- + */ +int +For_Eval (line) + char *line; /* Line to parse */ +{ + char *ptr = line, *sub, *wrd; + int level; /* Level at which to report errors. */ + + level = PARSE_FATAL; + + + if (forLevel == 0) { + Buffer buf; + int varlen; + + for (ptr++; *ptr && isspace(*ptr); ptr++) + continue; + /* + * If we are not in a for loop quickly determine if the statement is + * a for. + */ + if (ptr[0] != 'f' || ptr[1] != 'o' || ptr[2] != 'r' || !isspace(ptr[3])) + return FALSE; + ptr += 3; + + /* + * we found a for loop, and now we are going to parse it. + */ + while (*ptr && isspace(*ptr)) + ptr++; + + /* + * Grab the variable + */ + buf = Buf_Init(0); + for (wrd = ptr; *ptr && !isspace(*ptr); ptr++) + continue; + Buf_AddBytes(buf, ptr - wrd, (Byte *) wrd); + + forVar = (char *) Buf_GetAll(buf, &varlen); + if (varlen == 0) { + Parse_Error (level, "missing variable in for"); + return 0; + } + Buf_Destroy(buf, FALSE); + + while (*ptr && isspace(*ptr)) + ptr++; + + /* + * Grab the `in' + */ + if (ptr[0] != 'i' || ptr[1] != 'n' || !isspace(ptr[2])) { + Parse_Error (level, "missing `in' in for"); + printf("%s\n", ptr); + return 0; + } + ptr += 3; + + while (*ptr && isspace(*ptr)) + ptr++; + + /* + * Make a list with the remaining words + */ + forLst = Lst_Init(FALSE); + buf = Buf_Init(0); + sub = Var_Subst(NULL, ptr, VAR_GLOBAL, FALSE); + +#define ADDWORD() \ + Buf_AddBytes(buf, ptr - wrd, (Byte *) wrd), \ + Buf_AddByte(buf, (Byte) '\0'), \ + Lst_AtEnd(forLst, (ClientData) Buf_GetAll(buf, &varlen)), \ + Buf_Destroy(buf, FALSE) + + for (ptr = sub; *ptr && isspace(*ptr); ptr++) + continue; + + for (wrd = ptr; *ptr; ptr++) + if (isspace(*ptr)) { + ADDWORD(); + buf = Buf_Init(0); + while (*ptr && isspace(*ptr)) + ptr++; + wrd = ptr--; + } + if (DEBUG(FOR)) + (void) fprintf(stderr, "For: Iterator %s List %s\n", forVar, sub); + if (ptr - wrd > 0) + ADDWORD(); + else + Buf_Destroy(buf, TRUE); + free((Address) sub); + + forBuf = Buf_Init(0); + forLevel++; + return 1; + } + else if (*ptr == '.') { + + for (ptr++; *ptr && isspace(*ptr); ptr++) + continue; + + if (strncmp(ptr, "endfor", 6) == 0 && (isspace(ptr[6]) || !ptr[6])) { + if (DEBUG(FOR)) + (void) fprintf(stderr, "For: end for %d\n", forLevel); + if (--forLevel < 0) { + Parse_Error (level, "for-less endfor"); + return 0; + } + } + else if (strncmp(ptr, "for", 3) == 0 && isspace(ptr[3])) { + forLevel++; + if (DEBUG(FOR)) + (void) fprintf(stderr, "For: new loop %d\n", forLevel); + } + } + + if (forLevel != 0) { + Buf_AddBytes(forBuf, strlen(line), (Byte *) line); + Buf_AddByte(forBuf, (Byte) '\n'); + return 1; + } + else { + return 0; + } +} + +/*- + *----------------------------------------------------------------------- + * ForExec -- + * Expand the for loop for this index and push it in the Makefile + * + * Results: + * None. + * + * Side Effects: + * None. + * + *----------------------------------------------------------------------- + */ +static int +ForExec(name, arg) + char *name; + struct For *arg; +{ + int len; + Var_Set(arg->var, name, VAR_GLOBAL); + if (DEBUG(FOR)) + (void) fprintf(stderr, "--- %s = %s\n", arg->var, name); + Parse_FromString(Var_Subst(arg->var, (char *) Buf_GetAll(arg->buf, &len), + VAR_GLOBAL, FALSE)); + Var_Delete(arg->var, VAR_GLOBAL); + + return 0; +} + + +/*- + *----------------------------------------------------------------------- + * For_Run -- + * Run the for loop, immitating the actions of an include file + * + * Results: + * None. + * + * Side Effects: + * None. + * + *----------------------------------------------------------------------- + */ +void +For_Run() +{ + struct For arg; + + if (forVar == NULL || forBuf == NULL || forLst == NULL) + return; + arg.var = forVar; + arg.buf = forBuf; + arg.lst = forLst; + forVar = NULL; + forBuf = NULL; + forLst = NULL; + + Lst_ForEach(arg.lst, ForExec, (ClientData) &arg); + + free((Address)arg.var); + Lst_Destroy(arg.lst, free); + Buf_Destroy(arg.buf, TRUE); +} -- cgit v1.1