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- /* obstack.c - subroutines used implicitly by object stack macros
- Copyright (C) 1988 Free Software Foundation, Inc.
-
- $Id: obstack.c,v 1.8 91/07/29 16:49:38 jeff Exp $
-
- This program is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; either version 1, or (at your option) any
- later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
-
-
- In other words, you are welcome to use, share and improve this program.
- You are forbidden to forbid anyone else to use, share and improve
- what you give them. Help stamp out software-hoarding! */
-
-
- #include <stdio.h>
- #include "config.h"
- #include "obstack.h"
-
- #ifdef __STDC__
- #if defined( _MSDOS )
- #define POINTER char *
- #else
- #define POINTER void *
- #endif
- #else
- #define POINTER char *
- #endif
-
- /* Determine default alignment. */
- struct fooalign {char x; double d;};
- #define DEFAULT_ALIGNMENT ((char *)&((struct fooalign *) 0)->d - (char *)0)
- /* If malloc were really smart, it would round addresses to DEFAULT_ALIGNMENT.
- But in fact it might be less smart and round addresses to as much as
- DEFAULT_ROUNDING. So we prepare for it to do that. */
- union fooround {long x; double d;};
- #define DEFAULT_ROUNDING (sizeof (union fooround))
-
- /* When we copy a long block of data, this is the unit to do it with.
- On some machines, copying successive ints does not work;
- in such a case, redefine COPYING_UNIT to `long' (if that works)
- or `char' as a last resort. */
- #ifndef COPYING_UNIT
- #define COPYING_UNIT int
- #endif
-
- /* The non-GNU-C macros copy the obstack into this global variable
- to avoid multiple evaluation. */
-
- struct obstack *_obstack;
-
- /* Initialize an obstack H for use. Specify chunk size SIZE (0 means default).
- Objects start on multiples of ALIGNMENT (0 means use default).
- CHUNKFUN is the function to use to allocate chunks,
- and FREEFUN the function to free them. */
-
- void
- _obstack_begin (h, size, alignment, chunkfun, freefun)
- struct obstack *h;
- int size;
- int alignment;
- POINTER (*chunkfun) ();
- void (*freefun) ();
- {
- register struct _obstack_chunk* chunk; /* points to new chunk */
-
- if (alignment == 0)
- alignment = DEFAULT_ALIGNMENT;
- if (size == 0)
- /* Default size is what GNU malloc can fit in a 4096-byte block.
- Pick a number small enough that when rounded up to DEFAULT_ROUNDING
- it is still smaller than 4096 - 4. */
- {
- int extra = 4;
- if (extra < DEFAULT_ROUNDING)
- extra = DEFAULT_ROUNDING;
- size = 4096 - extra;
- }
-
- h->chunkfun = (struct _obstack_chunk * (*)()) chunkfun;
- h->freefun = freefun;
- h->chunk_size = size;
- h->alignment_mask = alignment - 1;
-
- chunk = h->chunk = (*h->chunkfun) (h->chunk_size);
- h->next_free = h->object_base = chunk->contents;
- h->chunk_limit = chunk->limit
- = (char *) chunk + h->chunk_size;
- chunk->prev = 0;
- }
-
- /* Allocate a new current chunk for the obstack *H
- on the assumption that LENGTH bytes need to be added
- to the current object, or a new object of length LENGTH allocated.
- Copies any partial object from the end of the old chunk
- to the beginning of the new one. */
-
- void
- _obstack_newchunk (h, length)
- struct obstack *h;
- int length;
- {
- register struct _obstack_chunk* old_chunk = h->chunk;
- register struct _obstack_chunk* new_chunk;
- register long new_size;
- register int obj_size = h->next_free - h->object_base;
- register int i;
- int already;
-
- /* Compute size for new chunk. */
- new_size = (obj_size + length) + (obj_size >> 3) + 100;
- if (new_size < h->chunk_size)
- new_size = h->chunk_size;
-
- /* Allocate and initialize the new chunk. */
- new_chunk = h->chunk = (*h->chunkfun) (new_size);
- new_chunk->prev = old_chunk;
- new_chunk->limit = h->chunk_limit = (char *) new_chunk + new_size;
-
- /* Move the existing object to the new chunk.
- Word at a time is fast and is safe if the object
- is sufficiently aligned. */
- if (h->alignment_mask + 1 >= DEFAULT_ALIGNMENT)
- {
- for (i = obj_size / sizeof (COPYING_UNIT) - 1;
- i >= 0; i--)
- ((COPYING_UNIT *)new_chunk->contents)[i]
- = ((COPYING_UNIT *)h->object_base)[i];
- /* We used to copy the odd few remaining bytes as one extra COPYING_UNIT,
- but that can cross a page boundary on a machine
- which does not do strict alignment for COPYING_UNITS. */
- already = obj_size / sizeof (COPYING_UNIT) * sizeof (COPYING_UNIT);
- }
- else
- already = 0;
- /* Copy remaining bytes one by one. */
- for (i = already; i < obj_size; i++)
- new_chunk->contents[i] = h->object_base[i];
-
- h->object_base = new_chunk->contents;
- h->next_free = h->object_base + obj_size;
- }
-
- /* Return nonzero if object OBJ has been allocated from obstack H.
- This is here for debugging.
- If you use it in a program, you are probably losing. */
-
- int
- _obstack_allocated_p (h, obj)
- struct obstack *h;
- POINTER obj;
- {
- register struct _obstack_chunk* lp; /* below addr of any objects in this chunk */
- register struct _obstack_chunk* plp; /* point to previous chunk if any */
-
- lp = (h)->chunk;
- while (lp != 0 && ((POINTER)lp > obj || (POINTER)(lp)->limit < obj))
- {
- plp = lp -> prev;
- lp = plp;
- }
- return lp != 0;
- }
-
- /* Free objects in obstack H, including OBJ and everything allocate
- more recently than OBJ. If OBJ is zero, free everything in H. */
-
- void
- #ifdef __STDC__
- #undef obstack_free
- obstack_free (struct obstack *h, POINTER obj)
- #else
- _obstack_free (h, obj)
- struct obstack *h;
- POINTER obj;
- #endif
- {
- register struct _obstack_chunk* lp; /* below addr of any objects in this chunk */
- register struct _obstack_chunk* plp; /* point to previous chunk if any */
-
- lp = (h)->chunk;
- while (lp != 0 && ((POINTER)lp > obj || (POINTER)(lp)->limit < obj))
- {
- plp = lp -> prev;
- (*h->freefun) (lp);
- lp = plp;
- }
- if (lp)
- {
- (h)->object_base = (h)->next_free = (char *)(obj);
- (h)->chunk_limit = lp->limit;
- (h)->chunk = lp;
- }
- else if (obj != 0)
- /* obj is not in any of the chunks! */
- abort ();
- }
-
- /* Let same .o link with output of gcc and other compilers. */
-
- #ifdef __STDC__
- void
- _obstack_free (h, obj)
- struct obstack *h;
- POINTER obj;
- {
- obstack_free (h, obj);
- }
- #endif
-
- #if 0
- /* These are now turned off because the applications do not use it
- and it uses bcopy via obstack_grow, which causes trouble on sysV. */
-
- /* Now define the functional versions of the obstack macros.
- Define them to simply use the corresponding macros to do the job. */
-
- #ifdef __STDC__
- /* These function definitions do not work with non-ANSI preprocessors;
- they won't pass through the macro names in parentheses. */
-
- /* The function names appear in parentheses in order to prevent
- the macro-definitions of the names from being expanded there. */
-
- POINTER (obstack_base) (obstack)
- struct obstack *obstack;
- {
- return obstack_base (obstack);
- }
-
- POINTER (obstack_next_free) (obstack)
- struct obstack *obstack;
- {
- return obstack_next_free (obstack);
- }
-
- int (obstack_object_size) (obstack)
- struct obstack *obstack;
- {
- return obstack_object_size (obstack);
- }
-
- int (obstack_room) (obstack)
- struct obstack *obstack;
- {
- return obstack_room (obstack);
- }
-
- void (obstack_grow) (obstack, pointer, length)
- struct obstack *obstack;
- POINTER pointer;
- int length;
- {
- obstack_grow (obstack, pointer, length);
- }
-
- void (obstack_grow0) (obstack, pointer, length)
- struct obstack *obstack;
- POINTER pointer;
- int length;
- {
- obstack_grow0 (obstack, pointer, length);
- }
-
- void (obstack_1grow) (obstack, character)
- struct obstack *obstack;
- int character;
- {
- obstack_1grow (obstack, character);
- }
-
- void (obstack_blank) (obstack, length)
- struct obstack *obstack;
- int length;
- {
- obstack_blank (obstack, length);
- }
-
- void (obstack_1grow_fast) (obstack, character)
- struct obstack *obstack;
- int character;
- {
- obstack_1grow_fast (obstack, character);
- }
-
- void (obstack_blank_fast) (obstack, length)
- struct obstack *obstack;
- int length;
- {
- obstack_blank_fast (obstack, length);
- }
-
- POINTER (obstack_finish) (obstack)
- struct obstack *obstack;
- {
- return obstack_finish (obstack);
- }
-
- POINTER (obstack_alloc) (obstack, length)
- struct obstack *obstack;
- int length;
- {
- return obstack_alloc (obstack, length);
- }
-
- POINTER (obstack_copy) (obstack, pointer, length)
- struct obstack *obstack;
- POINTER pointer;
- int length;
- {
- return obstack_copy (obstack, pointer, length);
- }
-
- POINTER (obstack_copy0) (obstack, pointer, length)
- struct obstack *obstack;
- POINTER pointer;
- int length;
- {
- return obstack_copy0 (obstack, pointer, length);
- }
-
- #endif /* __STDC__ */
-
- #endif /* 0 */
-
- #if defined( DSP56000 ) || defined( DSP96000 )
- int
- local_abort ( )
- {
- fprintf ( stderr,
- "\n\ninternal compiler error: contact Motorola DSP at (512) 891-3230\n" );
-
- exit ( -1 );
-
- return -1;
- }
-
-
- /* extend argv file file contents of a file */
- void
- extend_argv( argc, argv_addr )
- int * argc;
- char *** argv_addr;
- {
- FILE *Fflag_file;
- struct arg_node
- {
- int arg_list_length;
- char *arg_str;
- struct arg_node *next;
- } *arg_list = NULL, *tmp;
-
- int new_argc, cnt = 0;
- int Fflag_found = 0;
- char **argv = *argv_addr;
- char line_buffer[512];
-
- while ( cnt < *argc )
- {
- if ( ( argv[cnt][0] == '-' ) && ( argv[cnt][1] == 'F' ) )
- {
- Fflag_found = 1;
- break;
- }
-
- cnt ++ ;
- }
-
- /* no argv extension required */
- if ( ! Fflag_found )
- {
- return;
- }
-
- /* bump to where the file argument should be */
- cnt ++ ;
-
- /* verify that argv[cnt] exists */
- if ( argv[ cnt ] == NULL )
- {
- fprintf( stderr, "-F option requires file argument\n" );
- exit ( -1 );
- }
-
- if ( ( Fflag_file = fopen( argv[ cnt ], "r" ) ) == NULL )
- {
- perror( "Fflag file open" );
- exit ( -1 );
- }
-
- /* extract command-line arguments - one per line */
- while ( fgets( line_buffer, 512, Fflag_file ) != NULL )
- {
- char *token, *str1, *strtok();
-
- str1 = line_buffer;
-
- while ( ( token = strtok( str1, " \t\n" ) ) != NULL )
- {
- if ( arg_list == NULL )
- {
- arg_list = (struct arg_node *) malloc( sizeof( struct arg_node ) );
- arg_list -> arg_list_length = 1;
- tmp = arg_list;
- tmp->next = NULL;
- }
- else
- {
- arg_list -> arg_list_length ++;
- tmp->next = (struct arg_node *) xmalloc( sizeof( struct arg_node ) );
- tmp = tmp->next;
- tmp->next = NULL;
- }
-
- /* allocate space for arg string */
- tmp->arg_str = (char *) xmalloc( strlen( token ) + 1 );
- strcpy( tmp->arg_str, token );
-
- str1 = NULL;
- }
- }
-
- /* create "new argv", don't forget to blow out the -F option */
- new_argc= *argc - 2 + arg_list->arg_list_length;
- argv = (char **) xmalloc( sizeof( char *) * ( new_argc + 1 ) );
-
- new_argc = 0;
-
- /* go through the original argv and insert -F file contents in place */
- /* substitute file contents for "-F filename" */
- for ( cnt = 0 ; cnt < *argc ; cnt ++ )
- {
- if (((*argv_addr)[cnt][0] == '-' ) && ((*argv_addr)[cnt][1] == 'F'))
- {
- /* only ONE -F option */
- if ( Fflag_found )
- {
- Fflag_found = 0;
-
- while ( arg_list != NULL )
- {
- tmp = arg_list;
-
- argv[ new_argc ] = arg_list -> arg_str;
- arg_list = tmp->next;
- new_argc ++ ;
- }
-
- cnt ++ ; /* bump past filename argument */
- }
- else
- {
- fprintf( stderr, "Only one \"-F\" option allowed\n" );
- cnt ++ ; /* pass second -F filename argument */
- break;
- }
- }
- else
- {
- argv[ new_argc ] = (*argv_addr)[ cnt ];
- new_argc ++ ;
- }
- }
-
- /* terminate the new argv */
- argv[ new_argc ] = NULL;
-
- /* update "real" argv */
- *argv_addr = argv;
- *argc = new_argc;
- }
- #endif
-