| 1 | /*
|
|---|
| 2 | * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
|
|---|
| 3 | * Copyright (c) 1988, 1989 by Adam de Boor
|
|---|
| 4 | * Copyright (c) 1989 by Berkeley Softworks
|
|---|
| 5 | * All rights reserved.
|
|---|
| 6 | *
|
|---|
| 7 | * This code is derived from software contributed to Berkeley by
|
|---|
| 8 | * Adam de Boor.
|
|---|
| 9 | *
|
|---|
| 10 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 11 | * modification, are permitted provided that the following conditions
|
|---|
| 12 | * are met:
|
|---|
| 13 | * 1. Redistributions of source code must retain the above copyright
|
|---|
| 14 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 15 | * 2. Redistributions in binary form must reproduce the above copyright
|
|---|
| 16 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 17 | * documentation and/or other materials provided with the distribution.
|
|---|
| 18 | * 3. All advertising materials mentioning features or use of this software
|
|---|
| 19 | * must display the following acknowledgement:
|
|---|
| 20 | * This product includes software developed by the University of
|
|---|
| 21 | * California, Berkeley and its contributors.
|
|---|
| 22 | * 4. Neither the name of the University nor the names of its contributors
|
|---|
| 23 | * may be used to endorse or promote products derived from this software
|
|---|
| 24 | * without specific prior written permission.
|
|---|
| 25 | *
|
|---|
| 26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|---|
| 27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|---|
| 28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|---|
| 29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|---|
| 30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|---|
| 31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|---|
| 32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|---|
| 33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|---|
| 34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|---|
| 35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|---|
| 36 | * SUCH DAMAGE.
|
|---|
| 37 | */
|
|---|
| 38 |
|
|---|
| 39 | #ifndef lint
|
|---|
| 40 | #if 0
|
|---|
| 41 | static char sccsid[] = "@(#)buf.c 8.1 (Berkeley) 6/6/93";
|
|---|
| 42 | #else
|
|---|
| 43 | static const char rcsid[] =
|
|---|
| 44 | "$FreeBSD: src/usr.bin/make/buf.c,v 1.11 1999/09/11 13:08:01 hoek Exp $";
|
|---|
| 45 | #endif
|
|---|
| 46 | #endif /* not lint */
|
|---|
| 47 |
|
|---|
| 48 | /*-
|
|---|
| 49 | * buf.c --
|
|---|
| 50 | * Functions for automatically-expanded buffers.
|
|---|
| 51 | */
|
|---|
| 52 |
|
|---|
| 53 | #include "sprite.h"
|
|---|
| 54 | #include "make.h"
|
|---|
| 55 | #include "buf.h"
|
|---|
| 56 |
|
|---|
| 57 | #ifndef max
|
|---|
| 58 | #define max(a,b) ((a) > (b) ? (a) : (b))
|
|---|
| 59 | #endif
|
|---|
| 60 |
|
|---|
| 61 | /*
|
|---|
| 62 | * BufExpand --
|
|---|
| 63 | * Expand the given buffer to hold the given number of additional
|
|---|
| 64 | * bytes.
|
|---|
| 65 | * Makes sure there's room for an extra NULL byte at the end of the
|
|---|
| 66 | * buffer in case it holds a string.
|
|---|
| 67 | */
|
|---|
| 68 | #define BufExpand(bp,nb) \
|
|---|
| 69 | if (bp->left < (nb)+1) {\
|
|---|
| 70 | int newSize = (bp)->size + max((nb)+1,BUF_ADD_INC); \
|
|---|
| 71 | Byte *newBuf = (Byte *) erealloc((bp)->buffer, newSize); \
|
|---|
| 72 | \
|
|---|
| 73 | (bp)->inPtr = newBuf + ((bp)->inPtr - (bp)->buffer); \
|
|---|
| 74 | (bp)->outPtr = newBuf + ((bp)->outPtr - (bp)->buffer);\
|
|---|
| 75 | (bp)->buffer = newBuf;\
|
|---|
| 76 | (bp)->size = newSize;\
|
|---|
| 77 | (bp)->left = newSize - ((bp)->inPtr - (bp)->buffer);\
|
|---|
| 78 | }
|
|---|
| 79 |
|
|---|
| 80 | #define BUF_DEF_SIZE 256 /* Default buffer size */
|
|---|
| 81 | #define BUF_ADD_INC 256 /* Expansion increment when Adding */
|
|---|
| 82 | #define BUF_UNGET_INC 16 /* Expansion increment when Ungetting */
|
|---|
| 83 |
|
|---|
| 84 | /*-
|
|---|
| 85 | *-----------------------------------------------------------------------
|
|---|
| 86 | * Buf_OvAddByte --
|
|---|
| 87 | * Add a single byte to the buffer. left is zero or negative.
|
|---|
| 88 | *
|
|---|
| 89 | * Results:
|
|---|
| 90 | * None.
|
|---|
| 91 | *
|
|---|
| 92 | * Side Effects:
|
|---|
| 93 | * The buffer may be expanded.
|
|---|
| 94 | *
|
|---|
| 95 | *-----------------------------------------------------------------------
|
|---|
| 96 | */
|
|---|
| 97 | void
|
|---|
| 98 | Buf_OvAddByte (bp, byte)
|
|---|
| 99 | register Buffer bp;
|
|---|
| 100 | int byte;
|
|---|
| 101 | {
|
|---|
| 102 | int nbytes = 1;
|
|---|
| 103 | bp->left = 0;
|
|---|
| 104 | BufExpand (bp, nbytes);
|
|---|
| 105 |
|
|---|
| 106 | *bp->inPtr++ = byte;
|
|---|
| 107 | bp->left--;
|
|---|
| 108 |
|
|---|
| 109 | /*
|
|---|
| 110 | * Null-terminate
|
|---|
| 111 | */
|
|---|
| 112 | *bp->inPtr = 0;
|
|---|
| 113 | }
|
|---|
| 114 | |
|---|
| 115 |
|
|---|
| 116 | /*-
|
|---|
| 117 | *-----------------------------------------------------------------------
|
|---|
| 118 | * Buf_AddBytes --
|
|---|
| 119 | * Add a number of bytes to the buffer.
|
|---|
| 120 | *
|
|---|
| 121 | * Results:
|
|---|
| 122 | * None.
|
|---|
| 123 | *
|
|---|
| 124 | * Side Effects:
|
|---|
| 125 | * Guess what?
|
|---|
| 126 | *
|
|---|
| 127 | *-----------------------------------------------------------------------
|
|---|
| 128 | */
|
|---|
| 129 | void
|
|---|
| 130 | Buf_AddBytes (bp, numBytes, bytesPtr)
|
|---|
| 131 | register Buffer bp;
|
|---|
| 132 | int numBytes;
|
|---|
| 133 | const Byte *bytesPtr;
|
|---|
| 134 | {
|
|---|
| 135 |
|
|---|
| 136 | BufExpand (bp, numBytes);
|
|---|
| 137 |
|
|---|
| 138 | memcpy (bp->inPtr, bytesPtr, numBytes);
|
|---|
| 139 | bp->inPtr += numBytes;
|
|---|
| 140 | bp->left -= numBytes;
|
|---|
| 141 |
|
|---|
| 142 | /*
|
|---|
| 143 | * Null-terminate
|
|---|
| 144 | */
|
|---|
| 145 | *bp->inPtr = 0;
|
|---|
| 146 | }
|
|---|
| 147 | |
|---|
| 148 |
|
|---|
| 149 | /*-
|
|---|
| 150 | *-----------------------------------------------------------------------
|
|---|
| 151 | * Buf_UngetByte --
|
|---|
| 152 | * Place the byte back at the beginning of the buffer.
|
|---|
| 153 | *
|
|---|
| 154 | * Results:
|
|---|
| 155 | * SUCCESS if the byte was added ok. FAILURE if not.
|
|---|
| 156 | *
|
|---|
| 157 | * Side Effects:
|
|---|
| 158 | * The byte is stuffed in the buffer and outPtr is decremented.
|
|---|
| 159 | *
|
|---|
| 160 | *-----------------------------------------------------------------------
|
|---|
| 161 | */
|
|---|
| 162 | void
|
|---|
| 163 | Buf_UngetByte (bp, byte)
|
|---|
| 164 | register Buffer bp;
|
|---|
| 165 | int byte;
|
|---|
| 166 | {
|
|---|
| 167 |
|
|---|
| 168 | if (bp->outPtr != bp->buffer) {
|
|---|
| 169 | bp->outPtr--;
|
|---|
| 170 | *bp->outPtr = byte;
|
|---|
| 171 | } else if (bp->outPtr == bp->inPtr) {
|
|---|
| 172 | *bp->inPtr = byte;
|
|---|
| 173 | bp->inPtr++;
|
|---|
| 174 | bp->left--;
|
|---|
| 175 | *bp->inPtr = 0;
|
|---|
| 176 | } else {
|
|---|
| 177 | /*
|
|---|
| 178 | * Yech. have to expand the buffer to stuff this thing in.
|
|---|
| 179 | * We use a different expansion constant because people don't
|
|---|
| 180 | * usually push back many bytes when they're doing it a byte at
|
|---|
| 181 | * a time...
|
|---|
| 182 | */
|
|---|
| 183 | int numBytes = bp->inPtr - bp->outPtr;
|
|---|
| 184 | Byte *newBuf;
|
|---|
| 185 |
|
|---|
| 186 | newBuf = (Byte *)emalloc(bp->size + BUF_UNGET_INC);
|
|---|
| 187 | memcpy ((char *)(newBuf+BUF_UNGET_INC), (char *)bp->outPtr, numBytes+1);
|
|---|
| 188 | bp->outPtr = newBuf + BUF_UNGET_INC;
|
|---|
| 189 | bp->inPtr = bp->outPtr + numBytes;
|
|---|
| 190 | free ((char *)bp->buffer);
|
|---|
| 191 | bp->buffer = newBuf;
|
|---|
| 192 | bp->size += BUF_UNGET_INC;
|
|---|
| 193 | bp->left = bp->size - (bp->inPtr - bp->buffer);
|
|---|
| 194 | bp->outPtr -= 1;
|
|---|
| 195 | *bp->outPtr = byte;
|
|---|
| 196 | }
|
|---|
| 197 | }
|
|---|
| 198 | |
|---|
| 199 |
|
|---|
| 200 | /*-
|
|---|
| 201 | *-----------------------------------------------------------------------
|
|---|
| 202 | * Buf_UngetBytes --
|
|---|
| 203 | * Push back a series of bytes at the beginning of the buffer.
|
|---|
| 204 | *
|
|---|
| 205 | * Results:
|
|---|
| 206 | * None.
|
|---|
| 207 | *
|
|---|
| 208 | * Side Effects:
|
|---|
| 209 | * outPtr is decremented and the bytes copied into the buffer.
|
|---|
| 210 | *
|
|---|
| 211 | *-----------------------------------------------------------------------
|
|---|
| 212 | */
|
|---|
| 213 | void
|
|---|
| 214 | Buf_UngetBytes (bp, numBytes, bytesPtr)
|
|---|
| 215 | register Buffer bp;
|
|---|
| 216 | int numBytes;
|
|---|
| 217 | Byte *bytesPtr;
|
|---|
| 218 | {
|
|---|
| 219 |
|
|---|
| 220 | if (bp->outPtr - bp->buffer >= numBytes) {
|
|---|
| 221 | bp->outPtr -= numBytes;
|
|---|
| 222 | memcpy (bp->outPtr, bytesPtr, numBytes);
|
|---|
| 223 | } else if (bp->outPtr == bp->inPtr) {
|
|---|
| 224 | Buf_AddBytes (bp, numBytes, bytesPtr);
|
|---|
| 225 | } else {
|
|---|
| 226 | int curNumBytes = bp->inPtr - bp->outPtr;
|
|---|
| 227 | Byte *newBuf;
|
|---|
| 228 | int newBytes = max(numBytes,BUF_UNGET_INC);
|
|---|
| 229 |
|
|---|
| 230 | newBuf = (Byte *)emalloc (bp->size + newBytes);
|
|---|
| 231 | memcpy((char *)(newBuf+newBytes), (char *)bp->outPtr, curNumBytes+1);
|
|---|
| 232 | bp->outPtr = newBuf + newBytes;
|
|---|
| 233 | bp->inPtr = bp->outPtr + curNumBytes;
|
|---|
| 234 | free ((char *)bp->buffer);
|
|---|
| 235 | bp->buffer = newBuf;
|
|---|
| 236 | bp->size += newBytes;
|
|---|
| 237 | bp->left = bp->size - (bp->inPtr - bp->buffer);
|
|---|
| 238 | bp->outPtr -= numBytes;
|
|---|
| 239 | memcpy ((char *)bp->outPtr, (char *)bytesPtr, numBytes);
|
|---|
| 240 | }
|
|---|
| 241 | }
|
|---|
| 242 | |
|---|
| 243 |
|
|---|
| 244 | /*-
|
|---|
| 245 | *-----------------------------------------------------------------------
|
|---|
| 246 | * Buf_GetByte --
|
|---|
| 247 | * Return the next byte from the buffer. Actually returns an integer.
|
|---|
| 248 | *
|
|---|
| 249 | * Results:
|
|---|
| 250 | * Returns BUF_ERROR if there's no byte in the buffer, or the byte
|
|---|
| 251 | * itself if there is one.
|
|---|
| 252 | *
|
|---|
| 253 | * Side Effects:
|
|---|
| 254 | * outPtr is incremented and both outPtr and inPtr will be reset if
|
|---|
| 255 | * the buffer is emptied.
|
|---|
| 256 | *
|
|---|
| 257 | *-----------------------------------------------------------------------
|
|---|
| 258 | */
|
|---|
| 259 | int
|
|---|
| 260 | Buf_GetByte (bp)
|
|---|
| 261 | register Buffer bp;
|
|---|
| 262 | {
|
|---|
| 263 | int res;
|
|---|
| 264 |
|
|---|
| 265 | if (bp->inPtr == bp->outPtr) {
|
|---|
| 266 | return (BUF_ERROR);
|
|---|
| 267 | } else {
|
|---|
| 268 | res = (int) *bp->outPtr;
|
|---|
| 269 | bp->outPtr += 1;
|
|---|
| 270 | if (bp->outPtr == bp->inPtr) {
|
|---|
| 271 | bp->outPtr = bp->inPtr = bp->buffer;
|
|---|
| 272 | bp->left = bp->size;
|
|---|
| 273 | *bp->inPtr = 0;
|
|---|
| 274 | }
|
|---|
| 275 | return (res);
|
|---|
| 276 | }
|
|---|
| 277 | }
|
|---|
| 278 | |
|---|
| 279 |
|
|---|
| 280 | /*-
|
|---|
| 281 | *-----------------------------------------------------------------------
|
|---|
| 282 | * Buf_GetBytes --
|
|---|
| 283 | * Extract a number of bytes from the buffer.
|
|---|
| 284 | *
|
|---|
| 285 | * Results:
|
|---|
| 286 | * The number of bytes gotten.
|
|---|
| 287 | *
|
|---|
| 288 | * Side Effects:
|
|---|
| 289 | * The passed array is overwritten.
|
|---|
| 290 | *
|
|---|
| 291 | *-----------------------------------------------------------------------
|
|---|
| 292 | */
|
|---|
| 293 | int
|
|---|
| 294 | Buf_GetBytes (bp, numBytes, bytesPtr)
|
|---|
| 295 | register Buffer bp;
|
|---|
| 296 | int numBytes;
|
|---|
| 297 | Byte *bytesPtr;
|
|---|
| 298 | {
|
|---|
| 299 |
|
|---|
| 300 | if (bp->inPtr - bp->outPtr < numBytes) {
|
|---|
| 301 | numBytes = bp->inPtr - bp->outPtr;
|
|---|
| 302 | }
|
|---|
| 303 | memcpy (bytesPtr, bp->outPtr, numBytes);
|
|---|
| 304 | bp->outPtr += numBytes;
|
|---|
| 305 |
|
|---|
| 306 | if (bp->outPtr == bp->inPtr) {
|
|---|
| 307 | bp->outPtr = bp->inPtr = bp->buffer;
|
|---|
| 308 | bp->left = bp->size;
|
|---|
| 309 | *bp->inPtr = 0;
|
|---|
| 310 | }
|
|---|
| 311 | return (numBytes);
|
|---|
| 312 | }
|
|---|
| 313 | |
|---|
| 314 |
|
|---|
| 315 | /*-
|
|---|
| 316 | *-----------------------------------------------------------------------
|
|---|
| 317 | * Buf_GetAll --
|
|---|
| 318 | * Get all the available data at once.
|
|---|
| 319 | *
|
|---|
| 320 | * Results:
|
|---|
| 321 | * A pointer to the data and the number of bytes available.
|
|---|
| 322 | *
|
|---|
| 323 | * Side Effects:
|
|---|
| 324 | * None.
|
|---|
| 325 | *
|
|---|
| 326 | *-----------------------------------------------------------------------
|
|---|
| 327 | */
|
|---|
| 328 | Byte *
|
|---|
| 329 | Buf_GetAll (bp, numBytesPtr)
|
|---|
| 330 | register Buffer bp;
|
|---|
| 331 | int *numBytesPtr;
|
|---|
| 332 | {
|
|---|
| 333 |
|
|---|
| 334 | if (numBytesPtr != (int *)NULL) {
|
|---|
| 335 | *numBytesPtr = bp->inPtr - bp->outPtr;
|
|---|
| 336 | }
|
|---|
| 337 |
|
|---|
| 338 | return (bp->outPtr);
|
|---|
| 339 | }
|
|---|
| 340 | |
|---|
| 341 |
|
|---|
| 342 | /*-
|
|---|
| 343 | *-----------------------------------------------------------------------
|
|---|
| 344 | * Buf_Discard --
|
|---|
| 345 | * Throw away bytes in a buffer.
|
|---|
| 346 | *
|
|---|
| 347 | * Results:
|
|---|
| 348 | * None.
|
|---|
| 349 | *
|
|---|
| 350 | * Side Effects:
|
|---|
| 351 | * The bytes are discarded.
|
|---|
| 352 | *
|
|---|
| 353 | *-----------------------------------------------------------------------
|
|---|
| 354 | */
|
|---|
| 355 | void
|
|---|
| 356 | Buf_Discard (bp, numBytes)
|
|---|
| 357 | register Buffer bp;
|
|---|
| 358 | int numBytes;
|
|---|
| 359 | {
|
|---|
| 360 |
|
|---|
| 361 | if (bp->inPtr - bp->outPtr <= numBytes) {
|
|---|
| 362 | bp->inPtr = bp->outPtr = bp->buffer;
|
|---|
| 363 | bp->left = bp->size;
|
|---|
| 364 | *bp->inPtr = 0;
|
|---|
| 365 | } else {
|
|---|
| 366 | bp->outPtr += numBytes;
|
|---|
| 367 | }
|
|---|
| 368 | }
|
|---|
| 369 | |
|---|
| 370 |
|
|---|
| 371 | /*-
|
|---|
| 372 | *-----------------------------------------------------------------------
|
|---|
| 373 | * Buf_Size --
|
|---|
| 374 | * Returns the number of bytes in the given buffer. Doesn't include
|
|---|
| 375 | * the null-terminating byte.
|
|---|
| 376 | *
|
|---|
| 377 | * Results:
|
|---|
| 378 | * The number of bytes.
|
|---|
| 379 | *
|
|---|
| 380 | * Side Effects:
|
|---|
| 381 | * None.
|
|---|
| 382 | *
|
|---|
| 383 | *-----------------------------------------------------------------------
|
|---|
| 384 | */
|
|---|
| 385 | int
|
|---|
| 386 | Buf_Size (buf)
|
|---|
| 387 | Buffer buf;
|
|---|
| 388 | {
|
|---|
| 389 | return (buf->inPtr - buf->outPtr);
|
|---|
| 390 | }
|
|---|
| 391 | |
|---|
| 392 |
|
|---|
| 393 | /*-
|
|---|
| 394 | *-----------------------------------------------------------------------
|
|---|
| 395 | * Buf_Init --
|
|---|
| 396 | * Initialize a buffer. If no initial size is given, a reasonable
|
|---|
| 397 | * default is used.
|
|---|
| 398 | *
|
|---|
| 399 | * Results:
|
|---|
| 400 | * A buffer to be given to other functions in this library.
|
|---|
| 401 | *
|
|---|
| 402 | * Side Effects:
|
|---|
| 403 | * The buffer is created, the space allocated and pointers
|
|---|
| 404 | * initialized.
|
|---|
| 405 | *
|
|---|
| 406 | *-----------------------------------------------------------------------
|
|---|
| 407 | */
|
|---|
| 408 | Buffer
|
|---|
| 409 | Buf_Init (size)
|
|---|
| 410 | int size; /* Initial size for the buffer */
|
|---|
| 411 | {
|
|---|
| 412 | Buffer bp; /* New Buffer */
|
|---|
| 413 |
|
|---|
| 414 | bp = (Buffer)emalloc(sizeof(*bp));
|
|---|
| 415 |
|
|---|
| 416 | if (size <= 0) {
|
|---|
| 417 | size = BUF_DEF_SIZE;
|
|---|
| 418 | }
|
|---|
| 419 | bp->left = bp->size = size;
|
|---|
| 420 | bp->buffer = (Byte *)emalloc(size);
|
|---|
| 421 | bp->inPtr = bp->outPtr = bp->buffer;
|
|---|
| 422 | *bp->inPtr = 0;
|
|---|
| 423 |
|
|---|
| 424 | return (bp);
|
|---|
| 425 | }
|
|---|
| 426 | |
|---|
| 427 |
|
|---|
| 428 | /*-
|
|---|
| 429 | *-----------------------------------------------------------------------
|
|---|
| 430 | * Buf_Destroy --
|
|---|
| 431 | * Nuke a buffer and all its resources.
|
|---|
| 432 | *
|
|---|
| 433 | * Results:
|
|---|
| 434 | * None.
|
|---|
| 435 | *
|
|---|
| 436 | * Side Effects:
|
|---|
| 437 | * The buffer is freed.
|
|---|
| 438 | *
|
|---|
| 439 | *-----------------------------------------------------------------------
|
|---|
| 440 | */
|
|---|
| 441 | void
|
|---|
| 442 | Buf_Destroy (buf, freeData)
|
|---|
| 443 | Buffer buf; /* Buffer to destroy */
|
|---|
| 444 | Boolean freeData; /* TRUE if the data should be destroyed as well */
|
|---|
| 445 | {
|
|---|
| 446 |
|
|---|
| 447 | if (freeData) {
|
|---|
| 448 | free ((char *)buf->buffer);
|
|---|
| 449 | }
|
|---|
| 450 | free ((char *)buf);
|
|---|
| 451 | }
|
|---|
| 452 | |
|---|
| 453 |
|
|---|
| 454 | /*-
|
|---|
| 455 | *-----------------------------------------------------------------------
|
|---|
| 456 | * Buf_ReplaceLastByte --
|
|---|
| 457 | * Replace the last byte in a buffer.
|
|---|
| 458 | *
|
|---|
| 459 | * Results:
|
|---|
| 460 | * None.
|
|---|
| 461 | *
|
|---|
| 462 | * Side Effects:
|
|---|
| 463 | * If the buffer was empty intially, then a new byte will be added.
|
|---|
| 464 | * Otherwise, the last byte is overwritten.
|
|---|
| 465 | *
|
|---|
| 466 | *-----------------------------------------------------------------------
|
|---|
| 467 | */
|
|---|
| 468 | void
|
|---|
| 469 | Buf_ReplaceLastByte (buf, byte)
|
|---|
| 470 | Buffer buf; /* buffer to augment */
|
|---|
| 471 | int byte; /* byte to be written */
|
|---|
| 472 | {
|
|---|
| 473 | if (buf->inPtr == buf->outPtr)
|
|---|
| 474 | Buf_AddByte(buf, byte);
|
|---|
| 475 | else
|
|---|
| 476 | *(buf->inPtr - 1) = byte;
|
|---|
| 477 | }
|
|---|