Си — Говнокод.ру

Си / Говнокод #12822

+140

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static inline uint64_t parse_hex_uint64(const char *s) {
    const uint64_t m1 = 0x4040404040404040ll;
    const uint64_t m2 = 0x000F000F000F000Fll;
    const uint64_t m3 = 0x0F000F000F000F00ll;
    const uint64_t *p = (const uint64_t*)s;
    int64_t a = p[0], b = p[1];
    a += ((a & m1) >> 6) * 9;
    b += ((b & m1) >> 6) * 9;
    a = (a & m2) << 12 | (a & m3);
    b = (b & m2) << 12 | (b & m3);
    a |= a >> 24;
    b = b >> 8 | b << 16;
    return (a & 0x0000FFFF00000000ll) | (a & 0xFFFF) << 48 | b >> 48 | (b & 0xFFFF0000);
}

По мотивам http://govnokod.ru/12800#comment173346.

Байтоёбский парсинг шестнадцатеричного числа. Версия для 64 битного проца.

https://ideone.com/IFG0fH

bormand, 29 Марта 2013

Комментарии (125)

Си / Говнокод #12744

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void free_transaction(p_transaction_t trans) {
  p_transaction_t next = trans->next;
  while (next) {
    trans->next = next->next;
    free_transaction(next);
    next = trans->next;
  }
  xfree(trans);
}

Освобождение списка.

benderlog, 13 Марта 2013

Комментарии (2)

Си / Говнокод #12708

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if (sscanf(buf, "%d-%d-%d %d:%d:%d %d.%d.%d.%d %s %d.%d.%d.%d %llu %llu %llu %llu %d %d %d",
           &r->year,&r->month,&r->day,&r->hour,&t5,&t6,&s1,&s2,&s3,&s4,&r->iface,&d1,&d2,&d3,&d4,
           &r->packets_out,&r->bytes_out,&r->packets_in,&r->bytes_in,&r->proto,&r->sport,&r->dport)<22) {
    printf("Syntax error at line %u\n", t->count + 1);
    /* ... some cleanup ...*/
    return 0;
}

Вот так я читал строку из текстового файла в моем первом боевом проекте.

bormand, 08 Марта 2013

Комментарии (65)

Си / Говнокод #12653

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// где-то в коде нашлось
PRIVATE IdxArray* idx_array_append_val_dyn(IdxArray* arr, PlmIndex idx)

// private.h
#ifdef PLM_TEST
#define PRIVATE extern
#else
#define PRIVATE static
#endif

внезапно...

Try, 26 Февраля 2013

Комментарии (34)

Си / Говнокод #12604

+125

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void get_me(const char **retval)
{
    *retval = "Hello, Word!";
}

Надейся на компилятор...

Novi4oK, 16 Февраля 2013

Комментарии (39)

Си / Говнокод #12574

+131

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void *threadFunc(void *)
{
	// ...
	pthread_exit( (void*)lTaskId );
	return ( (void*)lTaskId );
	// ...
}

позабавило.

для непосвященных: return в функции потока аналогичен вызову pthread_exit().

Dummy00001, 11 Февраля 2013

Комментарии (3)

Си / Говнокод #12540

+139

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long __stdcall wndproc(HWND wnd, unsigned int message, WPARAM wparam, LPARAM lparam)
{
	switch(message)
	{
	case WM_USER + 100:
		{
			char data[128];
			fill_data(data);
			PostMessage(wnd, WM_USER + 666,  0, (LPARAM)data);
			return 0;
		}
	case WM_USER + 666:
		{
			char * data = (char *)lparam;
			use_data(data);
			return 0;
		}
//etc

Wandering of the pointer или как выжить вне стека.

Xom94ok, 05 Февраля 2013

Комментарии (26)

Си / Говнокод #12534

+111

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/* ..от молодых, дерзких и успешных,
форматирование и комментарии сохранены. */
void zanulit_massiv ()
{
	int i;
	for(i=0;i<27;i++) // dlja vseh elementov massiva
	{
		switch (i)   // perebiraem
		{
		case 0: mass_znach[0]=3;
		case 1: mass_znach[0]=5;
		case 2: mass_znach[0]=6;
		case 3: mass_znach[0]=1;
		case 4: mass_znach[0]=2;
		case 5: mass_znach[0]=3;
		case 6: mass_znach[0]=4;
		case 7: mass_znach[0]=5;
		case 8: mass_znach[0]=6;
		case 9: mass_znach[0]=31;
		case 10: mass_znach[0]=2;
		case 11: mass_znach[0]=1;
		case 12: mass_znach[0]=1;
		case 13: mass_znach[0]=1;
		case 14: mass_znach[0]=33;
		case 15: mass_znach[0]=15;
		case 16: mass_znach[0]=13;
		case 17: mass_znach[0]=8;
		case 18: mass_znach[0]=43;
		case 19: mass_znach[0]=2;
		case 20: mass_znach[0]=9;
		case 21: mass_znach[0]=14;
		case 22: mass_znach[0]=17;
		case 23: mass_znach[0]=21;
		case 24: mass_znach[0]=22;
		case 25: mass_znach[0]=8;
		case 26: mass_znach[0]=5;
		default: break; // objazatelno v sluchae neizvesnogo znacheniya
		}
	}
}

Не могу больше :|

neudachnik, 03 Февраля 2013

Комментарии (35)

Си / Говнокод #12533

+139

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for( i=0; i<MAX_CHANNELS; i++ )
  {
    ht->ht_Voices[i].vc_Delta=1;
    ht->ht_Voices[i].vc_OverrideTranspose=1000;  // 1.5
    ht->ht_Voices[i].vc_SamplePos=ht->ht_Voices[i].vc_Track=ht->ht_Voices[i].vc_Transpose=ht->ht_Voices[i].vc_NextTrack = ht->ht_Voices[i].vc_NextTranspose = 0;
    ht->ht_Voices[i].vc_ADSRVolume=ht->ht_Voices[i].vc_InstrPeriod=ht->ht_Voices[i].vc_TrackPeriod=ht->ht_Voices[i].vc_VibratoPeriod=ht->ht_Voices[i].vc_NoteMaxVolume=ht->ht_Voices[i].vc_PerfSubVolume=ht->ht_Voices[i].vc_TrackMasterVolume=0;
    ht->ht_Voices[i].vc_NewWaveform=ht->ht_Voices[i].vc_Waveform=ht->ht_Voices[i].vc_PlantSquare=ht->ht_Voices[i].vc_PlantPeriod=ht->ht_Voices[i].vc_IgnoreSquare=0;
    ht->ht_Voices[i].vc_TrackOn=ht->ht_Voices[i].vc_FixedNote=ht->ht_Voices[i].vc_VolumeSlideUp=ht->ht_Voices[i].vc_VolumeSlideDown=ht->ht_Voices[i].vc_HardCut=ht->ht_Voices[i].vc_HardCutRelease=ht->ht_Voices[i].vc_HardCutReleaseF=0;
    ht->ht_Voices[i].vc_PeriodSlideSpeed=ht->ht_Voices[i].vc_PeriodSlidePeriod=ht->ht_Voices[i].vc_PeriodSlideLimit=ht->ht_Voices[i].vc_PeriodSlideOn=ht->ht_Voices[i].vc_PeriodSlideWithLimit=0;
    ht->ht_Voices[i].vc_PeriodPerfSlideSpeed=ht->ht_Voices[i].vc_PeriodPerfSlidePeriod=ht->ht_Voices[i].vc_PeriodPerfSlideOn=ht->ht_Voices[i].vc_VibratoDelay=ht->ht_Voices[i].vc_VibratoCurrent=ht->ht_Voices[i].vc_VibratoDepth=ht->ht_Voices[i].vc_VibratoSpeed=0;
    ht->ht_Voices[i].vc_SquareOn=ht->ht_Voices[i].vc_SquareInit=ht->ht_Voices[i].vc_SquareLowerLimit=ht->ht_Voices[i].vc_SquareUpperLimit=ht->ht_Voices[i].vc_SquarePos=ht->ht_Voices[i].vc_SquareSign=ht->ht_Voices[i].vc_SquareSlidingIn=ht->ht_Voices[i].vc_SquareReverse=0;
    ht->ht_Voices[i].vc_FilterOn=ht->ht_Voices[i].vc_FilterInit=ht->ht_Voices[i].vc_FilterLowerLimit=ht->ht_Voices[i].vc_FilterUpperLimit=ht->ht_Voices[i].vc_FilterPos=ht->ht_Voices[i].vc_FilterSign=ht->ht_Voices[i].vc_FilterSpeed=ht->ht_Voices[i].vc_FilterSlidingIn=ht->ht_Voices[i].vc_IgnoreFilter=0;
    ht->ht_Voices[i].vc_PerfCurrent=ht->ht_Voices[i].vc_PerfSpeed=ht->ht_Voices[i].vc_WaveLength=ht->ht_Voices[i].vc_NoteDelayOn=ht->ht_Voices[i].vc_NoteCutOn=0;
    ht->ht_Voices[i].vc_AudioPeriod=ht->ht_Voices[i].vc_AudioVolume=ht->ht_Voices[i].vc_VoiceVolume=ht->ht_Voices[i].vc_VoicePeriod=ht->ht_Voices[i].vc_VoiceNum=ht->ht_Voices[i].vc_WNRandom=0;
    ht->ht_Voices[i].vc_SquareWait=ht->ht_Voices[i].vc_FilterWait=ht->ht_Voices[i].vc_PerfWait=ht->ht_Voices[i].vc_NoteDelayWait=ht->ht_Voices[i].vc_NoteCutWait=0;
    ht->ht_Voices[i].vc_PerfList=0;
    ht->ht_Voices[i].vc_RingSamplePos=ht->ht_Voices[i].vc_RingDelta=ht->ht_Voices[i].vc_RingPlantPeriod=ht->ht_Voices[i].vc_RingAudioPeriod=ht->ht_Voices[i].vc_RingNewWaveform=ht->ht_Voices[i].vc_RingWaveform=ht->ht_Voices[i].vc_RingFixedPeriod=ht->ht_Voices[i].vc_RingBasePeriod=0;

    ht->ht_Voices[i].vc_RingMixSource = NULL;
    ht->ht_Voices[i].vc_RingAudioSource = NULL;

    memset(&ht->ht_Voices[i].vc_SquareTempBuffer,0,0x80);
    memset(&ht->ht_Voices[i].vc_ADSR,0,sizeof(struct hvl_envelope));
    memset(&ht->ht_Voices[i].vc_VoiceBuffer,0,0x281);
    memset(&ht->ht_Voices[i].vc_RingVoiceBuffer,0,0x281);
  }

Щито оно делает?

Govnocoder#0xFF, 03 Февраля 2013

Комментарии (12)

Си / Говнокод #12469

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#if __BYTE_ORDER == __BIG_ENDIAN
struct DWstruct { Wtype high, low;};
#elif __BYTE_ORDER == __LITTLE_ENDIAN
struct DWstruct { Wtype low, high;};
#else
#error Unhandled endianity
#endif

glibc, sysdeps/wordsize-32/divdi3.c

bormand, 24 Января 2013

Комментарии (18)

Говнокод: по колено в коде.