Coverage Report

Created: 2025-07-01 06:59

/src/igraph/fuzzing/read_lgl.cpp
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/*
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   IGraph library.
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   Copyright (C) 2022-2023  The igraph development team
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 2 of the License, or
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   (at your option) any later version.
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   This program 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
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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   02110-1301 USA
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*/
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#include <igraph.h>
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#include <cstdio>
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extern "C"
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int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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    igraph_set_error_handler(igraph_error_handler_ignore);
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    igraph_set_warning_handler(igraph_warning_handler_ignore);
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    // Turn on attribute handling
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    igraph_set_attribute_table(&igraph_cattribute_table);
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    // Read input file
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    FILE *ifile = fmemopen((void*) data, size, "r");
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    if (!ifile) {
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0
        return 0;
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0
    }
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    // Do the fuzzing
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    igraph_t g;
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    if (igraph_read_graph_lgl(&g, ifile, 1, IGRAPH_ADD_WEIGHTS_IF_PRESENT, IGRAPH_UNDIRECTED) == IGRAPH_SUCCESS) {
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        FILE *ofile = fopen("/dev/null", "w");
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        if (ofile) {
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            // The "weight" attribute may not exist.
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            // In this case it is ignored with a warning.
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            igraph_write_graph_lgl(&g, ofile, "name", "weight", true);
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            fclose(ofile);
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        }
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        // Clean up
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        igraph_destroy(&g);
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    }
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    // no need to call igraph_destroy() if igraph_read_graph_lgl() returns an
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    // error code as we don't have a valid graph object in that case
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    fclose(ifile);
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    IGRAPH_ASSERT(IGRAPH_FINALLY_STACK_EMPTY);
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    return 0;
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}