Си — Говнокод.ру

Си / Говнокод #3048

+149.2

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#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>

#define myXPaddress 0b00000010
//#define transmit_en PD0

void avr_init(void);
void clear_buff(unsigned char buff);

volatile unsigned char bit9 = 0;
volatile unsigned char rbyte = 0;
volatile unsigned char pc_rbyte = 0;

volatile unsigned char pc_command[17];
volatile unsigned char xp_response[15];

volatile unsigned char pc_rec_pos = 0;
volatile unsigned char xp_rec_pos = 0;

volatile unsigned char pc_rec_en = 0;
volatile unsigned char xp_rec_en = 0;

volatile unsigned char pc_buff_ready = 0;
volatile unsigned char xp_buff_ready = 0;

volatile unsigned char my_window = 0;
volatile unsigned char ack = 0;

volatile unsigned char xp_xor = 0;

volatile unsigned char COMM = 0;

unsigned char i;

void rs485_ransmit( unsigned char data )
{
	while ( !( UCSR0A & (1<<UDRE0)) );
	UCSR0B &= ~(1<<TXB80); // SET 9 BIT IN 0
	UDR0 = data;
}

unsigned char rs485_reciv(void)
{
	char status,data;
	
	status=UCSR0A;
	bit9 = UCSR0B;
	data=UDR0;
	if ( status & ( (1<<FE)|(1<<DOR)|(1<<UPE) ) )
		return 0;
	
	return data;
}

unsigned char rs232_reciv( void )
{
	while ( !(UCSR1A & (1<<RXC1)) );
	return UDR1;
}
void rs232_transmit( unsigned char data )
{
	while ( !( UCSR1A & (1<<UDRE1)) );
	UDR1 = data;
}


ISR(USART1_RX_vect)
{
	pc_rbyte = rs232_reciv();
	
	if( pc_buff_ready == 1 && pc_rbyte == 0xFA )
	{
		pc_rec_en = 0;
		rs232_transmit('B');
		rs232_transmit('U');
		rs232_transmit('F');
		rs232_transmit('F');
		rs232_transmit(' ');
		rs232_transmit('O');
		rs232_transmit('V');
		rs232_transmit('F');
		return;
	}
		
	if( pc_rec_en == 1 )
		if( pc_rbyte == 0xFF)
		{
			pc_rec_en = 0;
			pc_buff_ready = 1;
			return;
		}
		else
		{
			pc_command[pc_rec_pos] = pc_rbyte;
			pc_rec_pos++;
			return;
		}

JovialLiX, 19 Апреля 2010

Комментарии (1)

Си / Говнокод #3047

+127.8

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int main()
{
	if (2 * 2 != 4)
	{
		printf ("Плохой день!");
		getch();
		return 1;
	}
	
	...
}

А вдруг???

XAKEP, 19 Апреля 2010

Комментарии (18)

Си / Говнокод #3017

+138.8

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#include <unistd.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>

// grep ^\s*$ file1 file2 ... | wc -l

int main(int argc, const char **argv)
{
	int fd[2];
	pid_t pid;
	
	assert(!pipe(fd));
	assert((pid = fork()) >= 0);
	
	if (!pid)
	{
		char **newargv;
		
		assert(dup2(fd[1], 1) == 1);
		assert(!close(fd[0]));
		assert(!close(fd[1]));
		assert(newargv = malloc((argc + 2) * sizeof(char *)));
		newargv[0] = "grep";
		newargv[1] = "^\\s*$";
		memcpy(newargv + 2, argv + 1, (argc + 1) * sizeof(char *));
		assert(execvp("grep", newargv) * 0);
	}
	
	assert((pid = fork()) >= 0);
	
	if (!pid)
	{
		assert(dup2(fd[0], 0) == 0);
		assert(!close(fd[0]));
		assert(!close(fd[1]));
		assert(execlp("wc", "wc", "-l", NULL) * 0);
	}
	
	assert(!close(fd[0]));
	assert(!close(fd[1]));
	
	while (wait(NULL) != -1);
	return 0;
}

Butjok, 15 Апреля 2010

Комментарии (18)

Си / Говнокод #2984

+144.8

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#ifndef __gen_spi_h
#define __gen_spi_h

#ifndef SPI_PORT_TYPE_OVERRIDE
#define SPI_PORT_TYPE unsigned int
#endif

#ifndef SPI_BYTE_TYPE_OVERRIDE
#define SPI_BYTE_TYPE unsigned char 
#endif

// SPI SS SIGNAL --- OUT
#define DECL_SS(N, P, B) \
volatile SPI_PORT_TYPE *const _##N##_SS_POUT = &(P##OUT); \
volatile SPI_PORT_TYPE *const _##N##_SS_PDIR = &(P##DIR); \
const SPI_PORT_TYPE           _##N##_SS_BIT  = B

// SPI SCK SIGNAL --- OUT
#define DECL_SCK(N, P, B) \
volatile SPI_PORT_TYPE *const _##N##_SCK_POUT = &P##OUT; \
volatile SPI_PORT_TYPE *const _##N##_SCK_PDIR = &(P##DIR); \
const SPI_PORT_TYPE           _##N##_SCK_BIT  = B

// SPI MOSI SIGNAL --- OUT
#define DECL_MOSI(N, P, B) \
volatile SPI_PORT_TYPE *const _##N##_MOSI_POUT = &P##OUT; \
volatile SPI_PORT_TYPE *const _##N##_MOSI_PDIR = &P##DIR; \
const SPI_PORT_TYPE           _##N##_MOSI_BIT  = B

// SPI MISO SIGNAL --- IN
#define DECL_MISO(N, P, B) \
volatile SPI_PORT_TYPE *const _##N##_MISO_PIN  = &P##IN; \
volatile SPI_PORT_TYPE *const _##N##_MISO_PDIR  = &P##DIR; \
const SPI_PORT_TYPE           _##N##_MISO_BIT  = B

#define SETSS(N) *(_##N##_SS_POUT) |= _##N##_SS_BIT
#define CLRSS(N) *(_##N##_SS_POUT) &= ~(_##N##_SS_BIT)

#define SETMOSI(N) *(_##N##_MOSI_POUT) |= _##N##_MOSI_BIT
#define CLRMOSI(N) *(_##N##_MOSI_POUT) &= ~(_##N##_MOSI_BIT)

#define SETCLK(N) *(_##N##_SCK_POUT) |= _##N##_SCK_BIT
#define CLRCLK(N) *(_##N##_SCK_POUT) &= ~(_##N##_SCK_BIT)

#define READMISO(N) (((*(_##N##_MISO_PIN)) & _##N##_MISO_BIT) != 0)

#define SPI_SETUP(N) \
    SETSS(N); \
   *(_##N##_SCK_PDIR)  |= _##N##_SCK_BIT;     \
   *(_##N##_MOSI_PDIR) |= _##N##_MOSI_BIT;    \
   *(_##N##_SS_PDIR)   |= _##N##_SS_BIT;      \
   *(_##N##_MISO_PDIR) &= ~(_##N##_MISO_BIT); \
    CLRSS(N); \
    SETSS(N)

#define DECL_SPI_TRANS_BYTE(N) \
SPI_BYTE_TYPE _##N##_spi_trans_byte(SPI_BYTE_TYPE val) { \
  register SPI_BYTE_TYPE bitnum; \
  for (bitnum = 0; bitnum < 8; bitnum++) { \
    if (val & 0x80) SETMOSI(N); \
    else CLRMOSI(N); \
    val <<= 1; \
    SETCLK(N); \
    val |= READMISO(N); \
    CLRCLK(N); \
  } \
  return val; \
} \

#define SPI_BEGIN(N) SETSS(N);CLRSS(N)
#define SPI_END(N)   SETSS(N)

#define SPI_TRANS_BYTE(N, B) _##N##_spi_trans_byte((B))

#endif

dmzlj.livejournal.com, 10 Апреля 2010

Комментарии (7)

Си / Говнокод #2968

+129.2

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new = ngx_pnalloc(cf->pool, sizeof("; domain=") - 1 + domain->len);
    if (new == NULL) {
        return NGX_CONF_ERROR;
    }

    p = ngx_cpymem(new, "; domain=", sizeof("; domain=") - 1);
    ngx_memcpy(p, domain->data, domain->len);

    domain->len += sizeof("; domain=") - 1;

Это, между прочим, файл nginx-0.7.62\src\http\modules\ngx_http_userid_ filter_module.c.
Такие вот разочарования случаются...

dmitry_113, 08 Апреля 2010

Комментарии (17)

Си / Говнокод #2931

+92.4

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void Read_Ri( int hARINC,unsigned short int *Data ,int *i16,int *i15,int *i14,
	int *i13,int *i12,int *i11,int *i10,int *i9,int *i8,int *i7,int *i6,int *i5,int *i4,int *i3,int *i2,int *i1)
{
		ioctl(hARINC,IOCTL_GET_RI,Data);
   		*i16=Data[0x1104]>>15&1; *i15=Data[0x1104]>>14&1; *i14=Data[0x1104]>>13&1;
		*i13=Data[0x1104]>>12&1; *i12=Data[0x1104]>>11&1; *i11=Data[0x1104]>>10&1;
		*i10=Data[0x1104]>>9&1; *i9=Data[0x1104]>>8&1; *i8=Data[0x1104]>>7&1;
		*i7=Data[0x1104]>>6&1; *i6=Data[0x1104]>>5&1; *i5=Data[0x1104]>>4&1;
		*i4=Data[0x1104]>>3&1; *i3=Data[0x1104]>>2&1; *i2=Data[0x1104]>>1&1; *i1=Data[0x1104]&1;
}

Фирма "Элкус" порадовала. Хорошо, что у их платы не 32-разрядные регистры :)

whiskey, 05 Апреля 2010

Комментарии (6)

Си / Говнокод #2886

+143.8

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//...
int a[65535],i;
//...
while(a[i]>0)
{
i++;
a[i]++;
a[i]++;
a[i]++;
a[i]++;
//еще 60 раз a[i]++;
i--;
a[i]--;
}

Вот что значит компилятор Brainfuck => C без примитивнейшего оптимизатора.
(приведенный обрывок кода соответствует [>++++еще 60 плюсов<-])

frp, 28 Марта 2010

Комментарии (13)

Си / Говнокод #2848

+96

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char str[STR_LEN + 1]; 

strncpy(str, inpust_str, STR_LEN);
xxx[STR_LEN] = '\0';

str[ strlen(str) ] = ':';
str[ strlen(str) + 1 ] = '1';
str[ strlen(str) + 2 ] = '\0';

Попытка добавить ":1" к строке.

Первым же "str[ strlen(str) ] = ':';" гробим нулевой символ в конце строки. Дальнейшие вызовы "strlen" - просто фигня какая-то. Ну и портим память.

benderlog, 23 Марта 2010

Комментарии (7)

Си / Говнокод #2830

+93.4

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/* This array makes it easy to sort filenames into merged-case order
 * (e.g. AaBbCcDdEeFf...). */
static unsigned char casemap[256] = {
    0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,
    0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,
    0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,
    0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,
    0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,
    0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,
    0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,
    0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F,
    0x40,0x41,0x43,0x45,0x47,0x49,0x4B,0x4D, /* @ABCDEFG */
    0x4F,0x51,0x53,0x55,0x57,0x59,0x5B,0x5D, /* HIJKLMNO */
    0x5F,0x61,0x63,0x65,0x67,0x69,0x6B,0x6D, /* PQRSTUVW */
    0x6F,0x71,0x73,0x75,0x76,0x77,0x78,0x79, /* XYZ[\]^_ */
    0x7A,0x42,0x44,0x46,0x48,0x4A,0x4C,0x4E, /* `abcdefg */
    0x50,0x52,0x54,0x56,0x58,0x5A,0x5C,0x5E, /* hijklmno */
    0x60,0x62,0x64,0x66,0x68,0x6A,0x6C,0x6E, /* pqrstuvw */
    0x70,0x72,0x74,0x7B,0x7C,0x7D,0x7E,0x7F, /* xyz{|}~  */
    0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,
    0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,
    0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,
    0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,
    0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,
    0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,
    0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,
    0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF,
    0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,
    0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,
    0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,
    0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,
    0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,
    0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,
    0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,
    0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF
};

L29Ah, 20 Марта 2010

Комментарии (25)

Си / Говнокод #2829