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annotate dds.c @ 206:c700a2d38fb8

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New AD9956 interface
author Daniele Nicolodi <daniele.nicolodi@obspm.fr>
date Mon, 31 Mar 2014 17:03:38 +0200
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children fcc988c6f841
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206
c700a2d38fb8 New AD9956 interface
Daniele Nicolodi <daniele.nicolodi@obspm.fr>
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1 #ifdef _CVI_
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2 #include <winsock2.h>
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3 #include <ansi_c.h>
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4 #else
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5 #include <stdio.h>
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6 #include <stdlib.h>
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7 #include <unistd.h>
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8 #include <errno.h>
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9 #include <string.h>
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10 #include <sys/types.h>
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11 #include <sys/socket.h>
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12 #include <netinet/in.h>
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13 #include <arpa/inet.h>
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14 #include <netdb.h>
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15 #include <ctype.h>
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16 #include <math.h>
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17 #include <stdarg.h>
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18 #endif
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19
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20 #include "dds.h"
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21
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22 int msend(int fd, char *buffer, int n)
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23 {
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24 int r;
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25
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26 buffer[n++] = '\r';
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27 buffer[n++] = '\n';
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28
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29 r = send(fd, buffer, n, 0);
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30 if (r < 0)
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31 return r;
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32
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33 return 0;
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34 }
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35
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36
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37 int mrecv(int fd, char *buffer, int len)
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38 {
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39 int n;
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40
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41 n = recv(fd, buffer, len, 0);
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42 if (n < 0)
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43 return n;
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44
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45 if ((buffer[--n] != '\n') || (buffer[--n] != '\r'))
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46 return -1;
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47
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48 buffer[n] = '\0';
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49
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50 return n;
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51 }
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52
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53
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54 int command(int fd, char *frmt, ...)
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55 {
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56 int r, n;
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57 char buffer[1024];
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58 va_list v;
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59
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60 va_start(v, frmt);
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61 n = vsnprintf(buffer, sizeof(buffer) - 2, frmt, v);
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62 va_end(v);
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63
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64 r = msend(fd, buffer, n);
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65 if (r < 0)
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66 return r;
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67
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68 r = mrecv(fd, buffer, sizeof(buffer));
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69 if (r < 0)
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70 return r;
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71
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72 if (! streq(buffer, "OK"))
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73 return -1;
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74
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75 return 0;
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76 }