Mercurial > hg > octave-kai > gnulib-hg
annotate lib/obstack.h @ 5095:0afa9dc2bdfc
(obstack_base): Cast to (void *), per documentation.
| author | Jim Meyering <jim@meyering.net> |
|---|---|
| date | Thu, 24 Jun 2004 06:04:10 +0000 |
| parents | 57d23334289f |
| children | 663a1b941e51 |
| rev | line source |
|---|---|
| 334 | 1 /* obstack.h - object stack macros |
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2 Copyright (C) 1988-1994,1996-1999,2003,2004 Free Software Foundation, Inc. |
| 334 | 3 |
| 2991 | 4 This file is part of the GNU C Library. Its master source is NOT part of |
| 881 | 5 the C library, however. The master source lives in /gd/gnu/lib. |
| 334 | 6 |
| 1112 | 7 NOTE: The canonical source of this file is maintained with the GNU C Library. |
| 2991 | 8 Bugs can be reported to bug-glibc@gnu.org. |
| 334 | 9 |
| 4422 | 10 This program is free software; you can redistribute it and/or modify |
| 11 it under the terms of the GNU General Public License as published by | |
| 12 the Free Software Foundation; either version 2, or (at your option) | |
| 13 any later version. | |
| 1112 | 14 |
| 15 This program is distributed in the hope that it will be useful, | |
| 881 | 16 but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 4422 | 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 GNU General Public License for more details. | |
| 881 | 19 |
| 4422 | 20 You should have received a copy of the GNU General Public License along |
| 21 with this program; if not, write to the Free Software Foundation, | |
| 22 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
| 334 | 23 |
| 24 /* Summary: | |
| 25 | |
| 26 All the apparent functions defined here are macros. The idea | |
| 27 is that you would use these pre-tested macros to solve a | |
| 28 very specific set of problems, and they would run fast. | |
| 29 Caution: no side-effects in arguments please!! They may be | |
| 30 evaluated MANY times!! | |
| 31 | |
| 32 These macros operate a stack of objects. Each object starts life | |
| 33 small, and may grow to maturity. (Consider building a word syllable | |
| 34 by syllable.) An object can move while it is growing. Once it has | |
| 35 been "finished" it never changes address again. So the "top of the | |
| 36 stack" is typically an immature growing object, while the rest of the | |
| 37 stack is of mature, fixed size and fixed address objects. | |
| 38 | |
| 39 These routines grab large chunks of memory, using a function you | |
| 40 supply, called `obstack_chunk_alloc'. On occasion, they free chunks, | |
| 41 by calling `obstack_chunk_free'. You must define them and declare | |
| 42 them before using any obstack macros. | |
| 43 | |
| 44 Each independent stack is represented by a `struct obstack'. | |
| 45 Each of the obstack macros expects a pointer to such a structure | |
| 46 as the first argument. | |
| 47 | |
| 48 One motivation for this package is the problem of growing char strings | |
| 49 in symbol tables. Unless you are "fascist pig with a read-only mind" | |
| 50 --Gosper's immortal quote from HAKMEM item 154, out of context--you | |
| 51 would not like to put any arbitrary upper limit on the length of your | |
| 52 symbols. | |
| 53 | |
| 54 In practice this often means you will build many short symbols and a | |
| 55 few long symbols. At the time you are reading a symbol you don't know | |
| 56 how long it is. One traditional method is to read a symbol into a | |
| 57 buffer, realloc()ating the buffer every time you try to read a symbol | |
| 58 that is longer than the buffer. This is beaut, but you still will | |
| 59 want to copy the symbol from the buffer to a more permanent | |
| 60 symbol-table entry say about half the time. | |
| 61 | |
| 62 With obstacks, you can work differently. Use one obstack for all symbol | |
| 63 names. As you read a symbol, grow the name in the obstack gradually. | |
| 64 When the name is complete, finalize it. Then, if the symbol exists already, | |
| 65 free the newly read name. | |
| 66 | |
| 67 The way we do this is to take a large chunk, allocating memory from | |
| 68 low addresses. When you want to build a symbol in the chunk you just | |
| 69 add chars above the current "high water mark" in the chunk. When you | |
| 70 have finished adding chars, because you got to the end of the symbol, | |
| 71 you know how long the chars are, and you can create a new object. | |
| 72 Mostly the chars will not burst over the highest address of the chunk, | |
| 73 because you would typically expect a chunk to be (say) 100 times as | |
| 74 long as an average object. | |
| 75 | |
| 76 In case that isn't clear, when we have enough chars to make up | |
| 77 the object, THEY ARE ALREADY CONTIGUOUS IN THE CHUNK (guaranteed) | |
| 78 so we just point to it where it lies. No moving of chars is | |
| 79 needed and this is the second win: potentially long strings need | |
| 80 never be explicitly shuffled. Once an object is formed, it does not | |
| 81 change its address during its lifetime. | |
| 82 | |
| 83 When the chars burst over a chunk boundary, we allocate a larger | |
| 84 chunk, and then copy the partly formed object from the end of the old | |
| 85 chunk to the beginning of the new larger chunk. We then carry on | |
| 86 accreting characters to the end of the object as we normally would. | |
| 87 | |
| 88 A special macro is provided to add a single char at a time to a | |
| 89 growing object. This allows the use of register variables, which | |
| 90 break the ordinary 'growth' macro. | |
| 91 | |
| 92 Summary: | |
| 93 We allocate large chunks. | |
| 94 We carve out one object at a time from the current chunk. | |
| 95 Once carved, an object never moves. | |
| 96 We are free to append data of any size to the currently | |
| 97 growing object. | |
| 98 Exactly one object is growing in an obstack at any one time. | |
| 99 You can run one obstack per control block. | |
| 100 You may have as many control blocks as you dare. | |
| 101 Because of the way we do it, you can `unwind' an obstack | |
| 102 back to a previous state. (You may remove objects much | |
| 103 as you would with a stack.) | |
| 104 */ | |
| 105 | |
| 106 | |
| 107 /* Don't do the contents of this file more than once. */ | |
| 108 | |
| 1112 | 109 #ifndef _OBSTACK_H |
| 110 #define _OBSTACK_H 1 | |
| 111 | |
| 995 | 112 #ifdef __cplusplus |
| 113 extern "C" { | |
| 114 #endif | |
| 115 | |
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116 /* We need the type of a pointer subtraction. If __PTRDIFF_TYPE__ is |
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117 defined, as with GNU C, use that; that way we don't pollute the |
| 4667 | 118 namespace with <stddef.h>'s symbols. Otherwise, include <stddef.h> |
| 119 and use ptrdiff_t. */ | |
| 334 | 120 |
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121 #ifdef __PTRDIFF_TYPE__ |
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122 # define PTR_INT_TYPE __PTRDIFF_TYPE__ |
| 334 | 123 #else |
| 4667 | 124 # include <stddef.h> |
| 125 # define PTR_INT_TYPE ptrdiff_t | |
| 334 | 126 #endif |
| 127 | |
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128 /* If B is the base of an object addressed by P, return the result of |
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129 aligning P to the next multiple of A + 1. B and P must be of type |
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130 char *. A + 1 must be a power of 2. */ |
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131 |
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132 #define __BPTR_ALIGN(B, P, A) ((B) + (((P) - (B) + (A)) & ~(A))) |
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133 |
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134 /* Similiar to _BPTR_ALIGN (B, P, A), except optimize the common case |
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135 where pointers can be converted to integers, aligned as integers, |
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136 and converted back again. If PTR_INT_TYPE is narrower than a |
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137 pointer (e.g., the AS/400), play it safe and compute the alignment |
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138 relative to B. Otherwise, use the faster strategy of computing the |
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139 alignment relative to 0. */ |
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140 |
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141 #define __PTR_ALIGN(B, P, A) \ |
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142 __BPTR_ALIGN (sizeof (PTR_INT_TYPE) < sizeof (void *) ? (B) : (char *) 0, \ |
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143 P, A) |
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144 |
| 4667 | 145 #include <string.h> |
| 881 | 146 |
| 334 | 147 struct _obstack_chunk /* Lives at front of each chunk. */ |
| 148 { | |
| 149 char *limit; /* 1 past end of this chunk */ | |
| 150 struct _obstack_chunk *prev; /* address of prior chunk or NULL */ | |
| 151 char contents[4]; /* objects begin here */ | |
| 152 }; | |
| 153 | |
| 154 struct obstack /* control current object in current chunk */ | |
| 155 { | |
| 156 long chunk_size; /* preferred size to allocate chunks in */ | |
| 881 | 157 struct _obstack_chunk *chunk; /* address of current struct obstack_chunk */ |
| 334 | 158 char *object_base; /* address of object we are building */ |
| 159 char *next_free; /* where to add next char to current object */ | |
| 160 char *chunk_limit; /* address of char after current chunk */ | |
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161 union |
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162 { |
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163 PTR_INT_TYPE tempint; |
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164 void *tempptr; |
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165 } temp; /* Temporary for some macros. */ |
| 334 | 166 int alignment_mask; /* Mask of alignment for each object. */ |
| 779 | 167 /* These prototypes vary based on `use_extra_arg', and we use |
| 168 casts to the prototypeless function type in all assignments, | |
| 169 but having prototypes here quiets -Wstrict-prototypes. */ | |
| 170 struct _obstack_chunk *(*chunkfun) (void *, long); | |
| 171 void (*freefun) (void *, struct _obstack_chunk *); | |
| 881 | 172 void *extra_arg; /* first arg for chunk alloc/dealloc funcs */ |
| 334 | 173 unsigned use_extra_arg:1; /* chunk alloc/dealloc funcs take extra arg */ |
| 174 unsigned maybe_empty_object:1;/* There is a possibility that the current | |
| 175 chunk contains a zero-length object. This | |
| 176 prevents freeing the chunk if we allocate | |
| 177 a bigger chunk to replace it. */ | |
| 881 | 178 unsigned alloc_failed:1; /* No longer used, as we now call the failed |
| 179 handler on error, but retained for binary | |
| 180 compatibility. */ | |
| 334 | 181 }; |
| 182 | |
| 183 /* Declare the external functions we use; they are in obstack.c. */ | |
| 184 | |
| 185 extern void _obstack_newchunk (struct obstack *, int); | |
| 186 extern int _obstack_begin (struct obstack *, int, int, | |
| 779 | 187 void *(*) (long), void (*) (void *)); |
| 334 | 188 extern int _obstack_begin_1 (struct obstack *, int, int, |
| 779 | 189 void *(*) (void *, long), |
| 190 void (*) (void *, void *), void *); | |
| 881 | 191 extern int _obstack_memory_used (struct obstack *); |
| 334 | 192 |
| 193 void obstack_free (struct obstack *obstack, void *block); | |
| 194 | |
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195 |
| 881 | 196 /* Error handler called when `obstack_chunk_alloc' failed to allocate |
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197 more memory. This can be set to a user defined function which |
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198 should either abort gracefully or use longjump - but shouldn't |
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199 return. The default action is to print a message and abort. */ |
| 881 | 200 extern void (*obstack_alloc_failed_handler) (void); |
| 201 | |
| 202 /* Exit value used when `print_and_abort' is used. */ | |
| 203 extern int obstack_exit_failure; | |
| 334 | 204 |
| 205 /* Pointer to beginning of object being allocated or to be allocated next. | |
| 206 Note that this might not be the final address of the object | |
| 207 because a new chunk might be needed to hold the final size. */ | |
| 208 | |
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209 #define obstack_base(h) ((void *) (h)->object_base) |
| 334 | 210 |
| 211 /* Size for allocating ordinary chunks. */ | |
| 212 | |
| 213 #define obstack_chunk_size(h) ((h)->chunk_size) | |
| 214 | |
| 215 /* Pointer to next byte not yet allocated in current chunk. */ | |
| 216 | |
| 881 | 217 #define obstack_next_free(h) ((h)->next_free) |
| 334 | 218 |
| 219 /* Mask specifying low bits that should be clear in address of an object. */ | |
| 220 | |
| 221 #define obstack_alignment_mask(h) ((h)->alignment_mask) | |
| 222 | |
| 4667 | 223 /* To prevent prototype warnings provide complete argument list. */ |
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224 #define obstack_init(h) \ |
| 2990 | 225 _obstack_begin ((h), 0, 0, \ |
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226 (void *(*) (long)) obstack_chunk_alloc, \ |
| 2990 | 227 (void (*) (void *)) obstack_chunk_free) |
| 779 | 228 |
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229 #define obstack_begin(h, size) \ |
| 2990 | 230 _obstack_begin ((h), (size), 0, \ |
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231 (void *(*) (long)) obstack_chunk_alloc, \ |
| 2990 | 232 (void (*) (void *)) obstack_chunk_free) |
| 779 | 233 |
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234 #define obstack_specify_allocation(h, size, alignment, chunkfun, freefun) \ |
| 2990 | 235 _obstack_begin ((h), (size), (alignment), \ |
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236 (void *(*) (long)) (chunkfun), \ |
| 2990 | 237 (void (*) (void *)) (freefun)) |
| 779 | 238 |
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239 #define obstack_specify_allocation_with_arg(h, size, alignment, chunkfun, freefun, arg) \ |
| 2990 | 240 _obstack_begin_1 ((h), (size), (alignment), \ |
| 241 (void *(*) (void *, long)) (chunkfun), \ | |
| 995 | 242 (void (*) (void *, void *)) (freefun), (arg)) |
| 779 | 243 |
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244 #define obstack_chunkfun(h, newchunkfun) \ |
| 995 | 245 ((h) -> chunkfun = (struct _obstack_chunk *(*)(void *, long)) (newchunkfun)) |
| 779 | 246 |
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247 #define obstack_freefun(h, newfreefun) \ |
| 995 | 248 ((h) -> freefun = (void (*)(void *, struct _obstack_chunk *)) (newfreefun)) |
| 779 | 249 |
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250 #define obstack_1grow_fast(h,achar) (*((h)->next_free)++ = (achar)) |
| 334 | 251 |
| 252 #define obstack_blank_fast(h,n) ((h)->next_free += (n)) | |
| 881 | 253 |
| 254 #define obstack_memory_used(h) _obstack_memory_used (h) | |
| 334 | 255 |
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256 #if defined __GNUC__ && defined __STDC__ && __STDC__ |
| 350 | 257 /* NextStep 2.0 cc is really gcc 1.93 but it defines __GNUC__ = 2 and |
| 258 does not implement __extension__. But that compiler doesn't define | |
| 259 __GNUC_MINOR__. */ | |
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260 # if __GNUC__ < 2 || (__NeXT__ && !__GNUC_MINOR__) |
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261 # define __extension__ |
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262 # endif |
| 334 | 263 |
| 264 /* For GNU C, if not -traditional, | |
| 265 we can define these macros to compute all args only once | |
| 266 without using a global variable. | |
| 267 Also, we can avoid using the `temp' slot, to make faster code. */ | |
| 268 | |
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269 # define obstack_object_size(OBSTACK) \ |
| 334 | 270 __extension__ \ |
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271 ({ struct obstack const *__o = (OBSTACK); \ |
| 334 | 272 (unsigned) (__o->next_free - __o->object_base); }) |
| 273 | |
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274 # define obstack_room(OBSTACK) \ |
| 334 | 275 __extension__ \ |
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276 ({ struct obstack const *__o = (OBSTACK); \ |
| 334 | 277 (unsigned) (__o->chunk_limit - __o->next_free); }) |
| 278 | |
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279 # define obstack_make_room(OBSTACK,length) \ |
| 881 | 280 __extension__ \ |
| 281 ({ struct obstack *__o = (OBSTACK); \ | |
| 282 int __len = (length); \ | |
| 283 if (__o->chunk_limit - __o->next_free < __len) \ | |
| 284 _obstack_newchunk (__o, __len); \ | |
| 285 (void) 0; }) | |
| 286 | |
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287 # define obstack_empty_p(OBSTACK) \ |
| 1112 | 288 __extension__ \ |
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289 ({ struct obstack const *__o = (OBSTACK); \ |
| 1112 | 290 (__o->chunk->prev == 0 && __o->next_free - __o->chunk->contents == 0); }) |
| 291 | |
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292 # define obstack_grow(OBSTACK,where,length) \ |
| 334 | 293 __extension__ \ |
| 294 ({ struct obstack *__o = (OBSTACK); \ | |
| 295 int __len = (length); \ | |
| 296 if (__o->next_free + __len > __o->chunk_limit) \ | |
| 297 _obstack_newchunk (__o, __len); \ | |
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298 memcpy (__o->next_free, where, __len); \ |
| 881 | 299 __o->next_free += __len; \ |
| 334 | 300 (void) 0; }) |
| 301 | |
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302 # define obstack_grow0(OBSTACK,where,length) \ |
| 334 | 303 __extension__ \ |
| 304 ({ struct obstack *__o = (OBSTACK); \ | |
| 305 int __len = (length); \ | |
| 306 if (__o->next_free + __len + 1 > __o->chunk_limit) \ | |
| 307 _obstack_newchunk (__o, __len + 1); \ | |
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308 memcpy (__o->next_free, where, __len); \ |
| 881 | 309 __o->next_free += __len; \ |
| 310 *(__o->next_free)++ = 0; \ | |
| 334 | 311 (void) 0; }) |
| 312 | |
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313 # define obstack_1grow(OBSTACK,datum) \ |
| 334 | 314 __extension__ \ |
| 315 ({ struct obstack *__o = (OBSTACK); \ | |
| 316 if (__o->next_free + 1 > __o->chunk_limit) \ | |
| 317 _obstack_newchunk (__o, 1); \ | |
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318 obstack_1grow_fast (__o, datum); \ |
| 334 | 319 (void) 0; }) |
| 320 | |
| 2990 | 321 /* These assume that the obstack alignment is good enough for pointers |
| 322 or ints, and that the data added so far to the current object | |
| 334 | 323 shares that much alignment. */ |
| 479 | 324 |
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325 # define obstack_ptr_grow(OBSTACK,datum) \ |
| 334 | 326 __extension__ \ |
| 327 ({ struct obstack *__o = (OBSTACK); \ | |
| 328 if (__o->next_free + sizeof (void *) > __o->chunk_limit) \ | |
| 329 _obstack_newchunk (__o, sizeof (void *)); \ | |
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330 obstack_ptr_grow_fast (__o, datum); }) \ |
| 334 | 331 |
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332 # define obstack_int_grow(OBSTACK,datum) \ |
| 334 | 333 __extension__ \ |
| 334 ({ struct obstack *__o = (OBSTACK); \ | |
| 335 if (__o->next_free + sizeof (int) > __o->chunk_limit) \ | |
| 336 _obstack_newchunk (__o, sizeof (int)); \ | |
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337 obstack_int_grow_fast (__o, datum); }) |
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338 |
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339 # define obstack_ptr_grow_fast(OBSTACK,aptr) \ |
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340 __extension__ \ |
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341 ({ struct obstack *__o1 = (OBSTACK); \ |
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342 *(const void **) __o1->next_free = (aptr); \ |
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343 __o1->next_free += sizeof (const void *); \ |
| 334 | 344 (void) 0; }) |
| 345 | |
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346 # define obstack_int_grow_fast(OBSTACK,aint) \ |
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347 __extension__ \ |
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348 ({ struct obstack *__o1 = (OBSTACK); \ |
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349 *(int *) __o1->next_free = (aint); \ |
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350 __o1->next_free += sizeof (int); \ |
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351 (void) 0; }) |
| 334 | 352 |
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353 # define obstack_blank(OBSTACK,length) \ |
| 334 | 354 __extension__ \ |
| 355 ({ struct obstack *__o = (OBSTACK); \ | |
| 356 int __len = (length); \ | |
| 357 if (__o->chunk_limit - __o->next_free < __len) \ | |
| 358 _obstack_newchunk (__o, __len); \ | |
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359 obstack_blank_fast (__o, __len); \ |
| 334 | 360 (void) 0; }) |
| 361 | |
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362 # define obstack_alloc(OBSTACK,length) \ |
| 334 | 363 __extension__ \ |
| 364 ({ struct obstack *__h = (OBSTACK); \ | |
| 365 obstack_blank (__h, (length)); \ | |
| 366 obstack_finish (__h); }) | |
| 367 | |
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368 # define obstack_copy(OBSTACK,where,length) \ |
| 334 | 369 __extension__ \ |
| 370 ({ struct obstack *__h = (OBSTACK); \ | |
| 371 obstack_grow (__h, (where), (length)); \ | |
| 372 obstack_finish (__h); }) | |
| 373 | |
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374 # define obstack_copy0(OBSTACK,where,length) \ |
| 334 | 375 __extension__ \ |
| 376 ({ struct obstack *__h = (OBSTACK); \ | |
| 377 obstack_grow0 (__h, (where), (length)); \ | |
| 378 obstack_finish (__h); }) | |
| 379 | |
| 380 /* The local variable is named __o1 to avoid a name conflict | |
| 381 when obstack_blank is called. */ | |
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382 # define obstack_finish(OBSTACK) \ |
| 334 | 383 __extension__ \ |
| 384 ({ struct obstack *__o1 = (OBSTACK); \ | |
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385 void *__value = (void *) __o1->object_base; \ |
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386 if (__o1->next_free == __value) \ |
| 881 | 387 __o1->maybe_empty_object = 1; \ |
| 388 __o1->next_free \ | |
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389 = __PTR_ALIGN (__o1->object_base, __o1->next_free, \ |
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390 __o1->alignment_mask); \ |
| 881 | 391 if (__o1->next_free - (char *)__o1->chunk \ |
| 392 > __o1->chunk_limit - (char *)__o1->chunk) \ | |
| 393 __o1->next_free = __o1->chunk_limit; \ | |
| 394 __o1->object_base = __o1->next_free; \ | |
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395 __value; }) |
| 334 | 396 |
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397 # define obstack_free(OBSTACK, OBJ) \ |
| 334 | 398 __extension__ \ |
| 399 ({ struct obstack *__o = (OBSTACK); \ | |
| 400 void *__obj = (OBJ); \ | |
| 401 if (__obj > (void *)__o->chunk && __obj < (void *)__o->chunk_limit) \ | |
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402 __o->next_free = __o->object_base = (char *)__obj; \ |
| 334 | 403 else (obstack_free) (__o, __obj); }) |
| 404 | |
| 405 #else /* not __GNUC__ or not __STDC__ */ | |
| 406 | |
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407 # define obstack_object_size(h) \ |
| 881 | 408 (unsigned) ((h)->next_free - (h)->object_base) |
| 334 | 409 |
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410 # define obstack_room(h) \ |
| 334 | 411 (unsigned) ((h)->chunk_limit - (h)->next_free) |
| 412 | |
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413 # define obstack_empty_p(h) \ |
| 1112 | 414 ((h)->chunk->prev == 0 && (h)->next_free - (h)->chunk->contents == 0) |
| 415 | |
| 334 | 416 /* Note that the call to _obstack_newchunk is enclosed in (..., 0) |
| 417 so that we can avoid having void expressions | |
| 418 in the arms of the conditional expression. | |
| 419 Casting the third operand to void was tried before, | |
| 420 but some compilers won't accept it. */ | |
| 421 | |
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422 # define obstack_make_room(h,length) \ |
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423 ( (h)->temp.tempint = (length), \ |
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424 (((h)->next_free + (h)->temp.tempint > (h)->chunk_limit) \ |
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425 ? (_obstack_newchunk ((h), (h)->temp.tempint), 0) : 0)) |
| 881 | 426 |
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427 # define obstack_grow(h,where,length) \ |
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428 ( (h)->temp.tempint = (length), \ |
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429 (((h)->next_free + (h)->temp.tempint > (h)->chunk_limit) \ |
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430 ? (_obstack_newchunk ((h), (h)->temp.tempint), 0) : 0), \ |
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431 memcpy ((h)->next_free, where, (h)->temp.tempint), \ |
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432 (h)->next_free += (h)->temp.tempint) |
| 334 | 433 |
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434 # define obstack_grow0(h,where,length) \ |
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435 ( (h)->temp.tempint = (length), \ |
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436 (((h)->next_free + (h)->temp.tempint + 1 > (h)->chunk_limit) \ |
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437 ? (_obstack_newchunk ((h), (h)->temp.tempint + 1), 0) : 0), \ |
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438 memcpy ((h)->next_free, where, (h)->temp.tempint), \ |
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439 (h)->next_free += (h)->temp.tempint, \ |
| 881 | 440 *((h)->next_free)++ = 0) |
| 334 | 441 |
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442 # define obstack_1grow(h,datum) \ |
| 334 | 443 ( (((h)->next_free + 1 > (h)->chunk_limit) \ |
| 444 ? (_obstack_newchunk ((h), 1), 0) : 0), \ | |
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445 obstack_1grow_fast (h, datum)) |
| 334 | 446 |
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447 # define obstack_ptr_grow(h,datum) \ |
| 334 | 448 ( (((h)->next_free + sizeof (char *) > (h)->chunk_limit) \ |
| 449 ? (_obstack_newchunk ((h), sizeof (char *)), 0) : 0), \ | |
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450 obstack_ptr_grow_fast (h, datum)) |
| 334 | 451 |
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452 # define obstack_int_grow(h,datum) \ |
| 334 | 453 ( (((h)->next_free + sizeof (int) > (h)->chunk_limit) \ |
| 454 ? (_obstack_newchunk ((h), sizeof (int)), 0) : 0), \ | |
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455 obstack_int_grow_fast (h, datum)) |
| 334 | 456 |
| 2990 | 457 # define obstack_ptr_grow_fast(h,aptr) \ |
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458 (((const void **) ((h)->next_free += sizeof (void *)))[-1] = (aptr)) |
| 2990 | 459 |
| 460 # define obstack_int_grow_fast(h,aint) \ | |
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461 (((int *) ((h)->next_free += sizeof (int)))[-1] = (aptr)) |
| 334 | 462 |
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463 # define obstack_blank(h,length) \ |
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464 ( (h)->temp.tempint = (length), \ |
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465 (((h)->chunk_limit - (h)->next_free < (h)->temp.tempint) \ |
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466 ? (_obstack_newchunk ((h), (h)->temp.tempint), 0) : 0), \ |
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467 obstack_blank_fast (h, (h)->temp.tempint)) |
| 334 | 468 |
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469 # define obstack_alloc(h,length) \ |
| 334 | 470 (obstack_blank ((h), (length)), obstack_finish ((h))) |
| 471 | |
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472 # define obstack_copy(h,where,length) \ |
| 334 | 473 (obstack_grow ((h), (where), (length)), obstack_finish ((h))) |
| 474 | |
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475 # define obstack_copy0(h,where,length) \ |
| 334 | 476 (obstack_grow0 ((h), (where), (length)), obstack_finish ((h))) |
| 477 | |
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478 # define obstack_finish(h) \ |
| 881 | 479 ( ((h)->next_free == (h)->object_base \ |
| 334 | 480 ? (((h)->maybe_empty_object = 1), 0) \ |
| 481 : 0), \ | |
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482 (h)->temp.tempptr = (h)->object_base, \ |
| 334 | 483 (h)->next_free \ |
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484 = __PTR_ALIGN ((h)->object_base, (h)->next_free, \ |
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485 (h)->alignment_mask), \ |
| 881 | 486 (((h)->next_free - (char *) (h)->chunk \ |
| 487 > (h)->chunk_limit - (char *) (h)->chunk) \ | |
| 334 | 488 ? ((h)->next_free = (h)->chunk_limit) : 0), \ |
| 489 (h)->object_base = (h)->next_free, \ | |
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Paul Eggert <eggert@cs.ucla.edu>
parents:
5057
diff
changeset
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490 (h)->temp.tempptr) |
| 334 | 491 |
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4805
8f430f14ff21
Merge changes from glibc obstack; minor cleanups to make it easier to
Paul Eggert <eggert@cs.ucla.edu>
parents:
4804
diff
changeset
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492 # define obstack_free(h,obj) \ |
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5065
4ce8ff7e5f06
Port obstack to the AS/400.
Paul Eggert <eggert@cs.ucla.edu>
parents:
5057
diff
changeset
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493 ( (h)->temp.tempint = (char *) (obj) - (char *) (h)->chunk, \ |
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4ce8ff7e5f06
Port obstack to the AS/400.
Paul Eggert <eggert@cs.ucla.edu>
parents:
5057
diff
changeset
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494 ((((h)->temp.tempint > 0 \ |
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4ce8ff7e5f06
Port obstack to the AS/400.
Paul Eggert <eggert@cs.ucla.edu>
parents:
5057
diff
changeset
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495 && (h)->temp.tempint < (h)->chunk_limit - (char *) (h)->chunk)) \ |
| 334 | 496 ? (int) ((h)->next_free = (h)->object_base \ |
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5065
4ce8ff7e5f06
Port obstack to the AS/400.
Paul Eggert <eggert@cs.ucla.edu>
parents:
5057
diff
changeset
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497 = (h)->temp.tempint + (char *) (h)->chunk) \ |
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4ce8ff7e5f06
Port obstack to the AS/400.
Paul Eggert <eggert@cs.ucla.edu>
parents:
5057
diff
changeset
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498 : (((obstack_free) ((h), (h)->temp.tempint + (char *) (h)->chunk), 0), 0))) |
| 334 | 499 |
| 500 #endif /* not __GNUC__ or not __STDC__ */ | |
| 501 | |
| 995 | 502 #ifdef __cplusplus |
| 503 } /* C++ */ | |
| 504 #endif | |
| 505 | |
| 1112 | 506 #endif /* obstack.h */ |