Lichen

templates/native/buffer.c

932:c07b0dd14f85
10 months ago Paul Boddie Moved integer instantiation support to library functions.
     1 /* Native functions for buffer operations.     2      3 Copyright (C) 2016, 2017 Paul Boddie <paul@boddie.org.uk>     4      5 This program is free software; you can redistribute it and/or modify it under     6 the terms of the GNU General Public License as published by the Free Software     7 Foundation; either version 3 of the License, or (at your option) any later     8 version.     9     10 This program is distributed in the hope that it will be useful, but WITHOUT    11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS    12 FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more    13 details.    14     15 You should have received a copy of the GNU General Public License along with    16 this program.  If not, see <http://www.gnu.org/licenses/>.    17 */    18     19 #include <string.h> /* strcmp, memcpy */    20 #include "native/common.h"    21 #include "types.h"    22 #include "exceptions.h"    23 #include "ops.h"    24 #include "progconsts.h"    25 #include "progops.h"    26 #include "progtypes.h"    27 #include "main.h"    28     29 __attr __fn_native_buffer_buffer_str(__attr __self, __attr _data)    30 {    31     /* _data interpreted as buffer.__data__ */    32     __fragment *data = _data.seqvalue;    33     unsigned int size = 0, i, j, n;    34     char *s;    35     __attr o;    36     37     /* Calculate the size of the string. */    38     for (i = 0; i < data->size; i++)    39         size += __TOINT(__load_via_object(__VALUE(data->attrs[i]), __size__));    40     41     /* Reserve space for a new string. */    42     s = (char *) __ALLOCATE(size + 1, sizeof(char));    43     44     /* Build a single string from the buffer contents. */    45     for (i = 0, j = 0; i < data->size; i++)    46     {    47         o = __load_via_object(__VALUE(data->attrs[i]), __data__);    48         n = __TOINT(__load_via_object(__VALUE(data->attrs[i]), __size__));    49         memcpy(s + j, o.strvalue, n); /* does not null terminate but final byte should be zero */    50         j += n;    51     }    52     53     /* Return a new string. */    54     return __new_str(s, size);    55 }    56     57 /* Module initialisation. */    58     59 void __main_native_buffer()    60 {    61 }