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355
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1 cdef extern from "fcntl.h":
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2 int open(char *pathname, int flags)
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3 int O_WRONLY
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4
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5 cdef extern from "unistd.h":
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6 int write(int fd, void *buf, int count)
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7
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8 cdef extern from "string.h":
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9 char *strncpy(char *dest, char *src, int n)
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10
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11 cdef extern from "Python.h":
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12 char* PyString_AsString(object string)
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13
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14 cdef class Dmx:
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15 cdef int fd
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424
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16 def __cinit__(self, port="/dev/dmx0"):
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355
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17 self.fd = open(port, O_WRONLY)
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18 if self.fd < 0:
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19 raise OSError("open failed")
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20
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21 def write(self, buf):
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22 cdef char *cbuf
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23 cbuf = PyString_AsString(buf)
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24 if cbuf == NULL:
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424
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25 raise ValueError("string buffer conversion failed")
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355
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26 res = write(self.fd, cbuf, 513)
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27 if res < 0:
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28 raise OSError("write failed")
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