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Eliminate lengthy switch/case blocks for baudrates.

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This commit is contained in:
Martin Ling 2013-11-14 23:24:51 +00:00
parent 18fc2dd12b
commit da2748bfb3
1 changed files with 49 additions and 118 deletions
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167
serialport.c
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@ -59,6 +59,42 @@ struct sp_port_data {
#endif #endif
}; };
/* Standard baud rates. */
#ifdef _WIN32
#define BAUD_TYPE DWORD
#define BAUD(n) {CBR_##n, n}
#else
#define BAUD_TYPE speed_t
#define BAUD(n) {B##n, n}
#endif
struct std_baudrate {
BAUD_TYPE index;
int value;
};
const struct std_baudrate std_baudrates[] = {
#ifdef _WIN32
/*
* The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to
* have documented CBR_* macros.
*/
BAUD(110), BAUD(300), BAUD(600), BAUD(1200), BAUD(2400), BAUD(4800),
BAUD(9600), BAUD(14400), BAUD(19200), BAUD(38400), BAUD(57600),
BAUD(115200), BAUD(128000), BAUD(256000)
#else
BAUD(50), BAUD(75), BAUD(110), BAUD(134), BAUD(150), BAUD(200), BAUD(300),
BAUD(600), BAUD(1200), BAUD(1800), BAUD(2400), BAUD(4800), BAUD(9600),
BAUD(19200), BAUD(38400), BAUD(57600), BAUD(115200), BAUD(230400),
#if !defined(__APPLE__) && !defined(__OpenBSD__)
BAUD(460800)
#endif
#endif
};
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
#define NUM_STD_BAUDRATES ARRAY_SIZE(std_baudrates)
/* Helper functions for configuring ports. */ /* Helper functions for configuring ports. */
static int start_config(struct sp_port *port, struct sp_port_data *data); static int start_config(struct sp_port *port, struct sp_port_data *data);
static int set_baudrate(struct sp_port_data *data, int baudrate); static int set_baudrate(struct sp_port_data *data, int baudrate);
@ -557,130 +593,25 @@ static int start_config(struct sp_port *port, struct sp_port_data *data)
static int set_baudrate(struct sp_port_data *data, int baudrate) static int set_baudrate(struct sp_port_data *data, int baudrate)
{ {
unsigned int i;
for (i = 0; i < NUM_STD_BAUDRATES; i++) {
if (baudrate == std_baudrates[i].value) {
#ifdef _WIN32 #ifdef _WIN32
switch (baudrate) { data->dcb.BaudRate = std_baudrates[i].index;
/*
* The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to
* have documented CBR_* macros.
*/
case 110:
data->dcb.BaudRate = CBR_110;
break;
case 300:
data->dcb.BaudRate = CBR_300;
break;
case 600:
data->dcb.BaudRate = CBR_600;
break;
case 1200:
data->dcb.BaudRate = CBR_1200;
break;
case 2400:
data->dcb.BaudRate = CBR_2400;
break;
case 4800:
data->dcb.BaudRate = CBR_4800;
break;
case 9600:
data->dcb.BaudRate = CBR_9600;
break;
case 14400:
data->dcb.BaudRate = CBR_14400; /* Not available on Unix? */
break;
case 19200:
data->dcb.BaudRate = CBR_19200;
break;
case 38400:
data->dcb.BaudRate = CBR_38400;
break;
case 57600:
data->dcb.BaudRate = CBR_57600;
break;
case 115200:
data->dcb.BaudRate = CBR_115200;
break;
case 128000:
data->dcb.BaudRate = CBR_128000; /* Not available on Unix? */
break;
case 256000:
data->dcb.BaudRate = CBR_256000; /* Not available on Unix? */
break;
default:
return SP_ERR_ARG;
}
#else #else
speed_t baud; if (cfsetospeed(&data->term, std_baudrates[i].index) < 0)
switch (baudrate) { return SP_ERR_FAIL;
case 50:
baud = B50; if (cfsetispeed(&data->term, std_baudrates[i].index) < 0)
break; return SP_ERR_FAIL;
case 75:
baud = B75;
break;
case 110:
baud = B110;
break;
case 134:
baud = B134;
break;
case 150:
baud = B150;
break;
case 200:
baud = B200;
break;
case 300:
baud = B300;
break;
case 600:
baud = B600;
break;
case 1200:
baud = B1200;
break;
case 1800:
baud = B1800;
break;
case 2400:
baud = B2400;
break;
case 4800:
baud = B4800;
break;
case 9600:
baud = B9600;
break;
case 19200:
baud = B19200;
break;
case 38400:
baud = B38400;
break;
case 57600:
baud = B57600;
break;
case 115200:
baud = B115200;
break;
case 230400:
baud = B230400;
break;
#if !defined(__APPLE__) && !defined(__OpenBSD__)
case 460800:
baud = B460800;
break;
#endif #endif
default: break;
return SP_ERR_ARG; }
} }
if (cfsetospeed(&data->term, baud) < 0) if (i == NUM_STD_BAUDRATES)
return SP_ERR_FAIL; return SP_ERR_ARG;
if (cfsetispeed(&data->term, baud) < 0)
return SP_ERR_FAIL;
#endif
return SP_OK; return SP_OK;
} }