mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
302 lines
7.7 KiB
C
302 lines
7.7 KiB
C
/*
|
||
* Copyright (c) 1992, The Regents of the University of California.
|
||
* All rights reserved.
|
||
*
|
||
* 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.
|
||
*
|
||
* $Id$
|
||
*/
|
||
|
||
#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 <ctype.h>
|
||
#include "make.h"
|
||
#include "hash.h"
|
||
#include "dir.h"
|
||
#include "buf.h"
|
||
|
||
/*
|
||
* For statements are of the form:
|
||
*
|
||
* .for <variable> in <varlist>
|
||
* ...
|
||
* .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.
|
||
*/
|
||
typedef struct _For {
|
||
Buffer buf; /* Unexpanded buffer */
|
||
char* var; /* Index name */
|
||
Lst lst; /* List of variables */
|
||
} For;
|
||
|
||
static int ForExec __P((ClientData, ClientData));
|
||
|
||
|
||
|
||
|
||
/*-
|
||
*-----------------------------------------------------------------------
|
||
* For_Eval --
|
||
* Evaluate the for loop in the passed line. The line
|
||
* looks like this:
|
||
* .for <variable> in <varlist>
|
||
*
|
||
* 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((unsigned char) *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((unsigned char) ptr[3]))
|
||
return FALSE;
|
||
ptr += 3;
|
||
|
||
/*
|
||
* we found a for loop, and now we are going to parse it.
|
||
*/
|
||
while (*ptr && isspace((unsigned char) *ptr))
|
||
ptr++;
|
||
|
||
/*
|
||
* Grab the variable
|
||
*/
|
||
buf = Buf_Init(0);
|
||
for (wrd = ptr; *ptr && !isspace((unsigned char) *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((unsigned char) *ptr))
|
||
ptr++;
|
||
|
||
/*
|
||
* Grab the `in'
|
||
*/
|
||
if (ptr[0] != 'i' || ptr[1] != 'n' ||
|
||
!isspace((unsigned char) ptr[2])) {
|
||
Parse_Error (level, "missing `in' in for");
|
||
printf("%s\n", ptr);
|
||
return 0;
|
||
}
|
||
ptr += 3;
|
||
|
||
while (*ptr && isspace((unsigned char) *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_AtFront(forLst, (ClientData) Buf_GetAll(buf, &varlen)), \
|
||
Buf_Destroy(buf, FALSE)
|
||
|
||
for (ptr = sub; *ptr && isspace((unsigned char) *ptr); ptr++)
|
||
continue;
|
||
|
||
for (wrd = ptr; *ptr; ptr++)
|
||
if (isspace((unsigned char) *ptr)) {
|
||
ADDWORD();
|
||
buf = Buf_Init(0);
|
||
while (*ptr && isspace((unsigned char) *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((unsigned char) *ptr); ptr++)
|
||
continue;
|
||
|
||
if (strncmp(ptr, "endfor", 6) == 0 &&
|
||
(isspace((unsigned char) 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((unsigned char) 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(namep, argp)
|
||
ClientData namep;
|
||
ClientData argp;
|
||
{
|
||
char *name = (char *) namep;
|
||
For *arg = (For *) argp;
|
||
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()
|
||
{
|
||
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, (void (*) __P((ClientData))) free);
|
||
Buf_Destroy(arg.buf, TRUE);
|
||
}
|