C++ release_buffer函数代码示例

void make_map(int map[21][21], char *output, int chsec) {
  int x,y;
  char *result;
  sprintf(output, "\r\n%s\r\n", "-----------------------");
  for(y=0;y<21;y++) {
    strcat(output, "|");
    for(x=0;x<21;x++) {
      switch(map[x][y]) {
      case 100:
	strcat(output, " ");
	break;
      case 75:
	strcat(output, "\x1B[39;1m:\x1B[0m");
	break;
      case 50:
	result = get_buffer(64);
	sprintf(result, "\x1B[%s;31;[email protected]\x1B[0m", scodes[chsec].back);
	strcat(output, result);
	release_buffer(result);
	break;
      default:
	result = get_buffer(64);
        sprintf(result,"\x1B[%s;%sm%s\x1B[0m", 
        	scodes[map[x][y]].back, scodes[map[x][y]].fore, 
		scodes[map[x][y]].sym);
	strcat(output, result);
	release_buffer(result);
	break;
      }
    }
    strcat(output, "|\r\n");
  }
  strcat(output,"-----------------------\r\n");
}

int find_help_entry(const char *argument)
{
    int rec_count;
    MYSQL_RES *helpindex;
    char *searcharg=NULL, *line;

    if (!*argument)
        return (0);

    line = str_dup(argument);

    SQL_MALLOC(LOWERALL(line), searcharg);
    SQL_ESC(LOWERALL(line), searcharg);

    if (!(helpindex = mysqlGetResource(TABLE_HLP_INDEX, "SELECT keyword FROM %s WHERE keyword LIKE '%%%s%%' LIMIT 1;", TABLE_HLP_INDEX, searcharg))) {
        if (*searcharg)
            SQL_FREE(searcharg);
        release_buffer(line);
        return (0);
    }

    release_buffer(line);

    rec_count = mysql_num_rows(helpindex);
    mysql_free_result(helpindex);

    if (*searcharg)
        SQL_FREE(searcharg);

    if (rec_count == 1)
        return (1);

    return (0);
}

static int cdfs_find_in_dir(struct cdfs *cdfs, int dir, char *name, int len, struct buf **dirbuf, struct iso_directory_record **dirrec) {
  struct buf *buf;
  char *p;
  struct iso_directory_record *rec;
  int blk;
  int left;
  int reclen;
  int namelen;

  // The first two directory records are . (current) and .. (parent)
  blk = cdfs->path_table[dir]->extent;
  buf = get_buffer(cdfs->cache, blk++);
  if (!buf) return -EIO;

  // Get length of directory from the first record
  p = buf->data;
  rec = (struct iso_directory_record *) p;
  left = isonum_733(rec->size);

  // Find named entry in directory
  while (left > 0) {
    // Read next block if all records in current block has been read
    // Directory records never cross block boundaries
    if (p >= buf->data + CDFS_BLOCKSIZE) {
      release_buffer(cdfs->cache, buf);
      if (p > buf->data + CDFS_BLOCKSIZE) return -EIO;
      buf = get_buffer(cdfs->cache, blk++);
      if (!buf) return -EIO;
      p = buf->data;
    }

    // Check for match
    rec = (struct iso_directory_record *) p;
    reclen = isonum_711(rec->length);
    namelen = isonum_711(rec->name_len);
    
    if (reclen > 0) {
      if (cdfs_fnmatch(cdfs, name, len, (char *) rec->name, namelen)) {
        *dirrec = rec;
        *dirbuf = buf;
        return 0;
      }

      // Skip to next record
      p += reclen;
      left -= reclen;
    } else {
      // Skip to next block
      left -= (buf->data + CDFS_BLOCKSIZE) - p;
      p = buf->data + CDFS_BLOCKSIZE;
    }
  }

  release_buffer(cdfs->cache, buf);
  return -ENOENT;
}

void list_wands_staves (struct char_data *ch, char *input)
{
	int type=0;
	int i=0;
	int j=0;
	int k=0;
	char *wsbuf = get_buffer(MAX_STRING_LENGTH);

	skip_spaces(&input);
	switch (input[0]) {
	case 'T':
	case 't':
		type = ITEM_STAFF; 
		break;
	case 'W':
	case 'w':
		type = ITEM_WAND; 
		break;
	default:
		extended_mudlog(NRM, SYSL_BUGS, TRUE, "Default reached in list_scrolls_potions (arg = %s)", input);
		release_buffer(wsbuf);
		return; 
	}	/*switch...*/

	wsbuf[0]='\0';
	for (i=0;i<top_of_objt;i++) {
		j=obj_proto[i].obj_flags.type_flag; /*look for specific sort of item*/
		if (j == type) { /*found one*/
			sprintf(wsbuf+strlen(wsbuf),"[%5d] %-30s", /*print vnum, short description*/
			GET_OBJ_VNUM(&obj_proto[i]),
			obj_proto[i].short_description);

			/*
			 * values 0-3:
			 * Potion, Scroll - up to three spells [values 1-3]
			 */

			sprintf(wsbuf+strlen(wsbuf), " Spells: ");
			if (type==ITEM_STAFF) { /*staves have only one spell*/
				if ((GET_OBJ_VAL(&obj_proto[i], 3)) != (-1))
					sprintf(wsbuf+strlen(wsbuf), "%s ", skill_name(GET_OBJ_VAL(&obj_proto[i], 3)));
			} else {
				for (k=1; k < 4; k++) {
					if ((GET_OBJ_VAL(&obj_proto[i], k)) != (-1))
						sprintf(wsbuf+strlen(wsbuf), "%s ", skill_name(GET_OBJ_VAL(&obj_proto[i], k)));
				}
				sprintf(wsbuf+strlen(wsbuf), "\r\n");
			}
		}	/*if j == type*/
	}	/*for i...*/
	page_string (ch->desc, wsbuf, 1);
	release_buffer(wsbuf);
}

int BIKPlayer::EndVideo()
{
	int i;

	release_buffer(&c_pic);
	release_buffer(&c_last);
	for (i = 0; i < BINK_NB_SRC; i++) {
		av_freep((void **) &c_bundle[i].data);
	}
	video->DrawMovieSubtitle(0);
	return 0;
}

void list_scrolls_potions (struct char_data *ch, char *input)
{
	int type=0;
	int i=0;
	int j=0;
	int k=0;
	char *spbuf = get_buffer(MAX_STRING_LENGTH);

	skip_spaces(&input);
	switch (input[0]) {
	case 'S':
	case 's':
		type = ITEM_SCROLL; 
		break;
	case 'P':
	case 'p':
		type = ITEM_POTION; 
		break;
	default :
		mlog("SYSERR:  Default reached in list_scrolls_potions (arg = %s)", input);
		release_buffer(spbuf);
		return;
	}/*switch...*/

	spbuf[0]='\0';
	for (i=0;i<top_of_objt;i++) {
		j=obj_proto[i].obj_flags.type_flag; /*look for specific sort of item*/
		if (j == type) { /*found one*/
			sprintf(spbuf+strlen(spbuf),"[%5d] %-20s", /*print vnum, short description*/
			GET_OBJ_VNUM(&obj_proto[i]),
			obj_proto[i].short_description);

			/*
			 * values 0-3:
			 * Potion, Scroll - up to three spells [values 1-3]
			 */

			sprintf(spbuf+strlen(spbuf), " Spells: ");
			for (k=1;k<4;k++) {
				if ((GET_OBJ_VAL(&obj_proto[i], k)) != (-1))
					sprintf(spbuf+strlen(spbuf), "%s ", skill_name(GET_OBJ_VAL(&obj_proto[i], k)));
			}


			sprintf(spbuf+strlen(spbuf), "\r\n");

		}/*if j == type*/
	}/*for i...*/
	page_string (ch->desc, spbuf, 1);
	release_buffer(spbuf);
}

void do_list_wear (struct char_data *ch, char *input)
{
	char j = atoi(input);
	int i=0;
	char *wbuf = get_buffer(MAX_STRING_LENGTH);

	if (input[0] == '?') {
		j=0; 
		send_to_char ("Wear positions:\r\n", ch);
		for (i = 0; i < NUM_ITEM_WEARS; i++) {
			sprintf(buf, "(%2d) %-20.20s %s", 
			i + 1, wear_bits[i], 
			!(++j % 2) ? "\r\n" : "");
			send_to_char(buf, ch); 
		}
		send_to_char("\r\nIf you choose TAKE, you will be shown item that are !Take\r\n",ch);
		release_buffer(wbuf);
		return;
	}

	wbuf[0]='\0';

	j--; /*to be used with NAMES array*/

	if (j==0) { /*Show ony !Take items for this option*/
		for (i=0;i<top_of_objt;i++) /*cycle through every obj*/
			if (!(CAN_WEAR(&obj_proto[i], (1<<j)))) { /*check exact bit for requested position*/
				sprintf(wbuf+strlen(wbuf),"[%5d] %-32s !TAKE\r\n",
				GET_OBJ_VNUM(&obj_proto[i]),
				obj_proto[i].short_description); 
			}
		page_string (ch->desc, wbuf, 1); 
		release_buffer(wbuf);
		return;
	}

	for (i=0;i<top_of_objt;i++) { /*cycle through every obj*/
		if (CAN_WEAR(&obj_proto[i], (1<<j))) { /*check exact bit for requested position*/
			sprintf(wbuf+strlen(wbuf),"[%5d] %-32s ",
			GET_OBJ_VNUM(&obj_proto[i]),
			obj_proto[i].short_description); 
			sprintf(wbuf+strlen(wbuf),"%s\r\n", wear_bits[(int)j]); /*repeat position*/
		}
	}
	if (!buf)
		send_to_char("There are no items of that type in the object files.c",ch);
	page_string (ch->desc, wbuf, 1); 

	release_buffer(wbuf);
}

int cdfs_stat(struct fs *fs, char *name, struct stat64 *buffer) {
  struct cdfs *cdfs = (struct cdfs *) fs->data;
  struct iso_directory_record *rec;
  struct buf *buf;
  int rc;
  int size;

  rc = cdfs_find_file(cdfs, name, strlen(name), &buf, &rec);
  if (rc < 0) return rc;

  size = isonum_733(rec->size);

  if (buffer) {
    memset(buffer, 0, sizeof(struct stat64));

    if (rec->flags[0] & 2) {
      buffer->st_mode = S_IFDIR | S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
    } else {
      buffer->st_mode = S_IFREG | S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
    }

    buffer->st_ino = isonum_733(rec->extent);
    buffer->st_nlink = 1;
    buffer->st_dev = cdfs->devno;
    buffer->st_atime = buffer->st_mtime = buffer->st_ctime = cdfs_isodate(rec->date);
    buffer->st_size = size;
  };

  release_buffer(cdfs->cache, buf);
  return size;
}

drm_intel_bo *
intel_bufferobj_buffer(struct intel_context *intel,
                       struct intel_buffer_object *intel_obj,
		       GLuint flag)
{
   if (intel_obj->region) {
      if (flag == INTEL_WRITE_PART)
         intel_bufferobj_cow(intel, intel_obj);
      else if (flag == INTEL_WRITE_FULL) {
         intel_bufferobj_release_region(intel, intel_obj);
	 intel_bufferobj_alloc_buffer(intel, intel_obj);
      }
   }

   if (intel_obj->source)
      release_buffer(intel_obj);

   if (intel_obj->buffer == NULL) {
      intel_bufferobj_alloc_buffer(intel, intel_obj);
      drm_intel_bo_subdata(intel_obj->buffer,
			   0, intel_obj->Base.Size,
			   intel_obj->sys_buffer);

      free(intel_obj->sys_buffer);
      intel_obj->sys_buffer = NULL;
      intel_obj->offset = 0;
   }

   return intel_obj->buffer;
}

// ------------------------------------------------
// Function:        smtp_from()
// ------------------------------------------------
// Input:           Sender email address
// Output:          TRUE if succesful
// ------------------------------------------------
// Description:     Adds one MAIL FROM clause
// ------------------------------------------------
BOOL smtp_from(char *s)
{
    PPBUF buf;
    BOOL res;

    if(smtp_state != SMTP_FROM) return FALSE;

    // ----------------------
    // send MAIL FROM command
    // ----------------------
    buf = tcp_new(SOCKET_SMTP);
    if(buf == NULL) return FALSE;

    write_string(buf, "MAIL FROM:<");
    write_string(buf, s);
    write_string(buf, ">\r\n");
    res = tcp_send(SOCKET_SMTP, buf);
    release_buffer(buf);

    if(!res) return FALSE;

    if(!smtp_ok()) return FALSE;
    smtp_state = SMTP_RCPT;
    return TRUE;
}	

int cdfs_opendir(struct file *filp, char *name) {
  struct cdfs *cdfs = (struct cdfs *) filp->fs->data;
  struct iso_directory_record *rec;
  struct cdfs_file *cdfile;
  struct buf *buf;
  time_t date;
  int size;
  int extent;
  int flags;
  int rc;

  // Locate directory
  rc = cdfs_find_file(cdfs, name, strlen(name), &buf, &rec);
  if (rc < 0) return rc;

  flags = isonum_711(rec->flags);
  extent = isonum_733(rec->extent);
  date = cdfs_isodate(rec->date);
  size = isonum_733(rec->size);
  release_buffer(cdfs->cache, buf);

  if (!(flags & 2)) return -ENOTDIR;

  // Allocate and initialize file block
  cdfile = (struct cdfs_file *) kmalloc(sizeof(struct cdfs_file));
  if (!cdfile) return -ENOMEM;
  cdfile->extent = extent;
  cdfile->date = date;
  cdfile->size = size;

  filp->data = cdfile;
  filp->mode = S_IFDIR | S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
  return 0;
}

/**
 * @brief read process stderr
 * @param c the child to read stderr from
 * @returns 0 on success, -1 on error.
 */
int read_stderr(child_node *c) {
  buffer bigbuff;
  char buff[255];
  char *line;
  int count, ret;
  
  ret = 0;
  memset(&(bigbuff), 0, sizeof(buffer));
  
  while((count=read(c->stderr_fd, buff, 255)) > 0) {
    if(append_to_buffer(&(bigbuff), buff, count)) {
      ret = -1;
      goto exit;
    }
    
    while((line = get_line_from_buffer(&(bigbuff)))) {
      ret = on_cmd_stderr(c, line);
      free(line);
      
      if(ret)
        goto exit;
    }
  }
  
  exit:
  
  if(count<0) {
    print( ERROR, "read: %s", strerror(errno));
    ret = -1;
  }
  
  release_buffer(&(bigbuff));
  
  return ret;
}

/**
 * The BufferData() driver hook.
 *
 * Implements glBufferData(), which recreates a buffer object's data store
 * and populates it with the given data, if present.
 *
 * Any data that was previously stored in the buffer object is lost.
 *
 * \return true for success, false if out of memory
 */
static GLboolean
intel_bufferobj_data(struct gl_context * ctx,
                     GLenum target,
                     GLsizeiptrARB size,
                     const GLvoid * data,
                     GLenum usage, struct gl_buffer_object *obj)
{
   struct brw_context *brw = brw_context(ctx);
   struct intel_buffer_object *intel_obj = intel_buffer_object(obj);

   /* Part of the ABI, but this function doesn't use it.
    */
   (void) target;

   intel_obj->Base.Size = size;
   intel_obj->Base.Usage = usage;

   assert(!obj->Pointer); /* Mesa should have unmapped it */

   if (intel_obj->buffer != NULL)
      release_buffer(intel_obj);

   if (size != 0) {
      intel_bufferobj_alloc_buffer(brw, intel_obj);
      if (!intel_obj->buffer)
         return false;

      if (data != NULL)
	 drm_intel_bo_subdata(intel_obj->buffer, 0, size, data);
   }

   return true;
}

/**
 * Replace data in a subrange of buffer object.  If the data range
 * specified by size + offset extends beyond the end of the buffer or
 * if data is NULL, no copy is performed.
 * Called via glBufferSubDataARB().
 */
static void
intel_bufferobj_subdata(struct gl_context * ctx,
                        GLintptrARB offset,
                        GLsizeiptrARB size,
                        const GLvoid * data, struct gl_buffer_object *obj)
{
   struct intel_context *intel = intel_context(ctx);
   struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
   bool busy;

   if (size == 0)
      return;

   assert(intel_obj);

   /* If we have a single copy in system memory, update that */
   if (intel_obj->sys_buffer) {
      if (intel_obj->source)
	 release_buffer(intel_obj);

      if (intel_obj->buffer == NULL) {
	 memcpy((char *)intel_obj->sys_buffer + offset, data, size);
	 return;
      }

      free(intel_obj->sys_buffer);
      intel_obj->sys_buffer = NULL;
   }

   /* Otherwise we need to update the copy in video memory. */
   busy =
      drm_intel_bo_busy(intel_obj->buffer) ||
      drm_intel_bo_references(intel->batch.bo, intel_obj->buffer);

   if (busy) {
      if (size == intel_obj->Base.Size) {
	 /* Replace the current busy bo with fresh data. */
	 drm_intel_bo_unreference(intel_obj->buffer);
	 intel_bufferobj_alloc_buffer(intel, intel_obj);
	 drm_intel_bo_subdata(intel_obj->buffer, 0, size, data);
      } else {
         perf_debug("Using a blit copy to avoid stalling on %ldb "
                    "glBufferSubData() to a busy buffer object.\n",
                    (long)size);
	 drm_intel_bo *temp_bo =
	    drm_intel_bo_alloc(intel->bufmgr, "subdata temp", size, 64);

	 drm_intel_bo_subdata(temp_bo, 0, size, data);

	 intel_emit_linear_blit(intel,
				intel_obj->buffer, offset,
				temp_bo, 0,
				size);

	 drm_intel_bo_unreference(temp_bo);
      }
   } else {
      drm_intel_bo_subdata(intel_obj->buffer, offset, size, data);
   }
}

// ------------------------------------------------
// Function:        ping_request()
// ------------------------------------------------
// Input:           IP address
//                  Network interface ID
// Output:          -
// ------------------------------------------------
// Description:     Sends a ping request message
// ------------------------------------------------
void ping_request(IPV4 ip, BYTE interface)
{
    PPBUF buf;

    buf = ip_new(ip, 64, interface);
    if(buf == NULL) return;

    // ---------------------
    // assemble ICMP message
    // ---------------------
    IPH(buf->start)->prot = IP_PROT_ICMP;
    ICMP(buf->data)->type = PING_REQUEST;
    ICMP(buf->data)->code = 0;
    ICMP(buf->data)->checksum = 0;
    ICMP(buf->data)->id = random();
    ICMP(buf->data)->seq = random();
    buf->size = sizeof(ICMP_HDR);

    // ------------------
    // calculate checksum
    // ------------------
    icmp_checksum(buf->data, buf->size);
    ICMP(buf->data)->checksum = HTONS(~WORDOF(chk_H, chk_L));

    // -----------------------------
    // sends message to IP interface
    // -----------------------------
    ip_send(buf);
    release_buffer(buf);
}