68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
/*
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This file is part of tgl-library
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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Copyright Vitaly Valtman 2014
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*/
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int skip_double (void) {
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if (in_ptr + 2 <= in_end) {
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in_ptr += 2;
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return 0;
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} else {
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return -1;
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}
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}
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int skip_long (void) {
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if (in_ptr + 2 <= in_end) {
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in_ptr += 2;
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return 0;
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} else {
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return -1;
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}
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}
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int skip_int (void) {
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if (in_ptr + 1 <= in_end) {
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in_ptr += 1;
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return 0;
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} else {
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return -1;
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}
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}
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int skip_string (void) {
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if (in_ptr == in_end) { return -1; }
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unsigned len = *(unsigned char *)in_ptr;
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if (len == 0xff) { return -1; }
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if (len < 0xfe) {
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unsigned size = (len + 4) >> 2;
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if (in_ptr + size <= in_end) {
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in_ptr += size;
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return 0;
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} else {
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return -1;
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}
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} else {
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len = (*(unsigned *)in_ptr) >> 8;
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unsigned size = (len + 7) >> 2;
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if (in_ptr + size <= in_end) {
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in_ptr += size;
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return 0;
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} else {
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return -1;
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}
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}
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}
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