C++ skip_line函数代码示例

int parse_delete(FILE * file, int * number)
{
    bool succeed =
            0 <= (*number = parse_index(file)) &&
            0 == parse_endl(file)
            ;
    skip_line(file);
    return succeed ? 0 : -1;
}

int parse_find(FILE * file, char * out_pattern, const int limit)
{
    bool succeed =
            0 == parse_word(file, out_pattern, limit) &&
            0 == parse_endl(file)
            ;
    skip_line(file);
    return succeed ? 0 : -1;
}

void page_length()
{
  vunits n;
  if (has_arg() && get_vunits(&n, 'v', topdiv->get_page_length()))
    topdiv->set_page_length(n);
  else
    topdiv->set_page_length(11*units_per_inch);
  skip_line();
}

int parse_insert(FILE * file, char * out_word, const int limit)
{
    bool succeed =
            0 == parse_word(file, out_word, limit) &&
            0 == parse_endl(file)
            ;
    skip_line(file);
    return succeed ? 0 : -1;
}

inline void
read_vert(LMESH* mesh, istream& in)
{
   double x, y, z;
   in >> x >> y >> z;
   skip_line(in);
   assert(mesh);
   mesh->add_vertex(Wpt(x,y,z));
}

void skip_white (char **start, char *end)
{
  while (*start < end && (isspace (**start) || **start == '%')) {
    if (**start == '%') 
      skip_line (start, end);
    else /* Skip the white char  */
      (*start)++;
  }
  return;
}

int parse_and_print_to_stdout(const char * operation)
{
    if (NULL == operation)
    {
        skip_line(stdin);
        return -1;
    }
    if (0 == strcmp(OP_INSERT, operation))
    {
        if (0 != parse_insert(stdin, word_buffer, MAX_WORD_LEN))
            return -1;
        int word_num = trie_insert(word_buffer);
        if (word_num < 0)
            return -1;
        printf("word number: %d\n", word_num);
    }
    if (0 == strcmp(OP_PREV, operation))
    {
        int number, start, end;
        if (0 != parse_prev(stdin, &number, &start, &end))
            return -1;
        int word_num = trie_prev(number, start, end);
        if (word_num < 0)
            return -1;
        printf("word number: %d\n", word_num);
    }
    if (0 == strcmp(OP_DELETE, operation))
    {
        int number;
        if (0 != parse_delete(stdin, &number))
            return -1;
        int word_num = trie_delete(number);
        if (word_num < 0)
            return -1;
        printf("deleted: %d\n", number);
    }
    if (0 == strcmp(OP_FIND, operation))
    {
        if (0 != parse_find(stdin, word_buffer, MAX_WORD_LEN))
            return -1;
        int find_result = trie_find(word_buffer, strlen(word_buffer));
        if (find_result < 0)
            return -1;
        puts(find_result == 0 ? "YES" : "NO");
    }
    if (0 == strcmp(OP_CLEAR, operation))
    {
        if (0 != parse_clear(stdin))
            return -1;
        if (0 != trie_clear())
            return -1;
        puts("cleared");
    }
    return 0;
}

static struct ptr_valid_map *get_proc_maps(unsigned int *num)
{
	char *buf, *p;
	struct ptr_valid_map *map;
	unsigned int max = 16;

	buf = grab("/proc/self/maps");
	if (!buf) {
		*num = 0;
		return NULL;
	}

	map = malloc(sizeof(*map) * max);
	if (!map)
		goto free_buf;

	*num = 0;
	for (p = buf; p && *p; p = skip_line(p)) {
		unsigned long start, end;
		char *endp;

		/* Expect '<start-in-hex>-<end-in-hex> rw... */
		start = strtoul(p, &endp, 16);
		if (*endp != '-')
			goto malformed;
		end = strtoul(endp+1, &endp, 16);
		if (*endp != ' ')
			goto malformed;

		endp++;
		if (endp[0] != 'r' && endp[0] != '-')
			goto malformed;
		if (endp[1] != 'w' && endp[1] != '-')
			goto malformed;

		/* We only add readable mappings. */
		if (endp[0] == 'r') {
			map = add_map(map, num, &max, start, end,
				      endp[1] == 'w');
			if (!map)
				goto free_buf;
		}
	}

	free(buf);
	return map;


malformed:
	free(map);
free_buf:
	free(buf);
	*num = 0;
	return NULL;
}

int parse_prev(FILE * file, int * number, int * start, int * end)
{
    bool succeed =
            0 <= (*number = parse_index(file)) &&
            0 <= (*start = parse_index(file)) &&
            0 <= (*end = parse_index(file)) &&
            0 == parse_endl(file)
            ;
    skip_line(file);
    return succeed ? 0 : -1;
}

int main()
{
  int numtests;
  input = fopen("ai.in","r");
  assert(input!=NULL);
  fscanf(input,"%d",&numtests);
  skip_line();
  while (numtests--) solve_case();
  fclose(input);
  return 0;
}

void mark()
{
  symbol s = get_name();
  if (s.is_null())
    curdiv->marked_place = curdiv->get_vertical_position();
  else if (curdiv == topdiv)
    set_number_reg(s, nl_reg_contents);
  else
    set_number_reg(s, curdiv->get_vertical_position().to_units());
  skip_line();
}

void save_vertical_space()
{
  vunits x;
  if (!has_arg() || !get_vunits(&x, 'v'))
    x = curenv->get_vertical_spacing();
  if (curdiv->distance_to_next_trap() > x)
    curdiv->space(x, 1);
  else
    saved_space = x;
  skip_line();
}

/* Read the header. Two numbers for width and height, and two optional
 * numbers for scale and offset. 
 */
static int
vips__matrix_header( char *whitemap, FILE *fp,
	int *width, int *height, double *scale, double *offset )   
{
	double header[4];
	double d;
	int i;
	int ch;

	for( i = 0; i < 4 && 
		(ch = read_ascii_double( fp, whitemap, &header[i] )) == 0; 
		i++ )
		;

	if( i < 2 ) {
		vips_error( "mask2vips", "%s", _( "no width / height" ) );
		return( -1 );
	}
	if( floor( header[0] ) != header[0] ||
		floor( header[1] ) != header[1] ) {
		vips_error( "mask2vips", "%s", _( "width / height not int" ) );
		return( -1 );
	}
	*width = header[0];
	*height = header[1];
	if( *width <= 0 || 
		*width > 100000 ||
		*height <= 0 || 
		*height > 100000 ) { 
		vips_error( "mask2vips", 
			"%s", _( "width / height out of range" ) );
		return( -1 );
	}
	if( i == 3 ) { 
		vips_error( "mask2vips", "%s", _( "bad scale / offset" ) );
		return( -1 );
	}
	if( (ch = read_ascii_double( fp, whitemap, &d )) != '\n' ) {
		vips_error( "mask2vips", "%s", _( "extra chars in header" ) );
		return( -1 );
	}
	if( i > 2 && 
		header[2] == 0.0 ) {
		vips_error( "mask2vips", "%s", _( "zero scale" ) );
		return( -1 );
	}

	*scale = i > 2 ?  header[2] : 1.0;
	*offset = i > 2 ?  header[3] : 0.0;

	skip_line( fp );

	return( 0 );
}

void
skip_whitespace_comments (FILE *fp)
   /* skips over all whitespace and comments, if any */
{
   skip_whitespace (fp);
   while (nextchar == '#') {
      skip_line (fp);
      if (nextchar != EOF)
         skip_whitespace (fp);
   }
}

 // skip_comments(is) utilise la fonction précédente pour sauter zéro, une ou plusieurs lignes
 // de commentaires débutées par '#' et allant jusqu'à '\n'.
 static void skip_comments(std::istream& is)
 {
  char c;
  is.get(c);       // Lire un caractère.
  while(c=='#')    // Tant que c'est un '#'.
   {
    skip_line(is); // On élimine les caractères jusqu'à la fin de ligne,
    is.get(c);     // Et on lit un nouveau caractère.
   }
  is.putback(c);   // On remet le caractère lu puisqu'il n'est pas un '#'.
 }