Add graph references

2026-06-28 13:49:01 +01:00
parent 0a9807e448
commit a11edf0c53
2578 changed files with 868045 additions and 0 deletions
@@ -0,0 +1,61 @@
+/*
+   igraph library.
+   Copyright (C) 2013-2024  The igraph development team <igraph@igraph.org>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#ifndef IGRAPH_BENCH_H
+#define IGRAPH_BENCH_H
+
+#include <sys/resource.h> /* getrusage */
+#include <sys/time.h>     /* gettimeofday */
+#include <unistd.h>       /* sleep */
+
+static inline void igraph_get_cpu_time(double *data) {
+
+    struct rusage self;
+    struct timeval real;
+    gettimeofday(&real, NULL);
+    getrusage(RUSAGE_SELF, &self);
+    data[0] = (double) real.tv_sec          + 1e-6 * real.tv_usec;          /* real */
+    data[1] = (double) self.ru_utime.tv_sec + 1e-6 * self.ru_utime.tv_usec; /* user */
+    data[2] = (double) self.ru_stime.tv_sec + 1e-6 * self.ru_stime.tv_usec; /* system */
+}
+
+#define BENCH_INIT() \
+    do { \
+        printf("\n|> Benchmark file: %s\n", IGRAPH_FILE_BASENAME); \
+        sleep(1); \
+    } while (0)
+
+#define REPEAT(CODE, N) \
+    do { \
+        igraph_int_t rep_i; \
+        for (rep_i=0; rep_i < N; ++rep_i) { CODE; } \
+    } while (0)
+
+#define BENCH(NAME, ...)    do { \
+        double start[3], stop[3]; \
+        double r, u, s; \
+        igraph_get_cpu_time(start); \
+        { __VA_ARGS__; } \
+        igraph_get_cpu_time(stop); \
+        r = 1e-3 * round(1e3 * (stop[0] - start[0])); \
+        u = 1e-3 * round(1e3 * (stop[1] - start[1])); \
+        s = 1e-3 * round(1e3 * (stop[2] - start[2])); \
+        printf("| %-80s %5.3gs  %5.3gs  %5.3gs\n", NAME, r, u, s); \
+    } while (0)
+
+#endif