linux-dvb-apps.git - linux-dvb-apps Debian packaging

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/* * section and descriptor parser * * Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org) * Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net) * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */ #include <libucsi/atsc/rrt_section.h> struct atsc_rrt_section *atsc_rrt_section_codec(struct atsc_section_psip *psip) { uint8_t * buf = (uint8_t *) psip; size_t pos = 0; size_t len = section_ext_length(&(psip->ext_head)); int idx; int vidx; struct atsc_rrt_section *rrt = (struct atsc_rrt_section *) psip; if (len < sizeof(struct atsc_rrt_section)) return NULL; pos += sizeof(struct atsc_rrt_section); if (len < (pos + rrt->rating_region_name_length)) return NULL; if (atsc_text_validate(buf+pos, rrt->rating_region_name_length)) return NULL; pos += rrt->rating_region_name_length; if (len < (pos + sizeof(struct atsc_rrt_section_part2))) return NULL; struct atsc_rrt_section_part2 *rrtpart2 = (struct atsc_rrt_section_part2 *) (buf+pos); pos += sizeof(struct atsc_rrt_section_part2); for(idx =0; idx < rrtpart2->dimensions_defined; idx++) { if (len < (pos + sizeof(struct atsc_rrt_dimension))) return NULL; struct atsc_rrt_dimension *dimension = (struct atsc_rrt_dimension *) (buf+pos); pos += sizeof(struct atsc_rrt_dimension); if (len < (pos + dimension->dimension_name_length)) return NULL; if (atsc_text_validate(buf+pos, dimension->dimension_name_length)) return NULL; pos += dimension->dimension_name_length; if (len < (pos + sizeof(struct atsc_rrt_dimension_part2))) return NULL; struct atsc_rrt_dimension_part2 *dpart2 = (struct atsc_rrt_dimension_part2 *) (buf+pos); pos += sizeof(struct atsc_rrt_dimension_part2); for(vidx =0; vidx < dpart2->values_defined; vidx++) { if (len < (pos + sizeof(struct atsc_rrt_dimension_value))) return NULL; struct atsc_rrt_dimension_value *value = (struct atsc_rrt_dimension_value *) (buf+pos); pos += sizeof(struct atsc_rrt_dimension_value); if (len < (pos + value->abbrev_rating_value_length)) return NULL; if (atsc_text_validate(buf+pos, value->abbrev_rating_value_length)) return NULL; pos += value->abbrev_rating_value_length; if (len < (pos + sizeof(struct atsc_rrt_dimension_value_part2))) return NULL; struct atsc_rrt_dimension_value_part2 *vpart2 = (struct atsc_rrt_dimension_value_part2 *) (buf+pos); pos += sizeof(struct atsc_rrt_dimension_value_part2); if (len < (pos + vpart2->rating_value_length)) return NULL; if (atsc_text_validate(buf+pos, vpart2->rating_value_length)) return NULL; pos+= vpart2->rating_value_length; } } if (len < (pos + sizeof(struct atsc_rrt_section_part3))) return NULL; struct atsc_rrt_section_part3 *part3 = (struct atsc_rrt_section_part3 *) (buf+pos); pos += sizeof(struct atsc_rrt_section_part3); if (len < (pos + part3->descriptors_length)) return NULL; if (verify_descriptors(buf + pos, part3->descriptors_length)) return NULL; pos += part3->descriptors_length; if (pos != len) return NULL; return (struct atsc_rrt_section *) psip; }


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