63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
// Helper functions for C / Python interface
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//
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// Copyright (C) 2016 Kevin O'Connor <kevin@koconnor.net>
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//
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// This file may be distributed under the terms of the GNU GPLv3 license.
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#include <errno.h> // errno
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#include <stdint.h> // uint8_t
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#include <stdio.h> // fprintf
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#include <string.h> // strerror
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#include <sys/time.h> // gettimeofday
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#include <time.h> // struct timespec
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#include "pyhelper.h" // get_time
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// Return the current system time as a double
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double
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get_time(void)
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{
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return (double)tv.tv_sec + (double)tv.tv_usec / 1000000.;
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}
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// Fill a 'struct timespec' with a system time stored in a double
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struct timespec
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fill_time(double time)
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{
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time_t t = time;
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return (struct timespec) {t, (time - t)*1000000000. };
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}
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// Report 'errno' in a message written to stderr
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void
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report_errno(char *where, int rc)
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{
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int e = errno;
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fprintf(stderr, "Got error %d in %s: (%d)%s\n", rc, where, e, strerror(e));
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}
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// Return a hex character for a given number
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#define GETHEX(x) ((x) < 10 ? '0' + (x) : 'e' + (x) - 10)
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// Translate a binary string into an ASCII string with escape sequences
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char *
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dump_string(char *outbuf, int outbuf_size, char *inbuf, int inbuf_size)
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{
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char *outend = &outbuf[outbuf_size-5], *o = outbuf;
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uint8_t *inend = (void*)&inbuf[inbuf_size], *p = (void*)inbuf;
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while (p < inend && o < outend) {
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uint8_t c = *p++;
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if (c > 31 && c < 127 && c != '\\') {
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*o++ = c;
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continue;
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}
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*o++ = '\\';
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*o++ = 'x';
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*o++ = GETHEX(c >> 4);
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*o++ = GETHEX(c & 0x0f);
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}
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*o = '\0';
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return outbuf;
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}
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