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annotate dds.c @ 223:7875436125dd

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Variable names clarification and cleanup
author Daniele Nicolodi <daniele.nicolodi@obspm.fr>
date Thu, 18 Sep 2014 18:03:27 +0200
parents fcc988c6f841
children
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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
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21 int msend(int fd, char *buffer, int n)
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22 {
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23 buffer[n++] = '\r';
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24 buffer[n++] = '\n';
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25
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26 return send(fd, buffer, n, 0);
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27 }
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28
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29
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30 int mrecv(int fd, char *buffer, int len)
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31 {
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32 int n;
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33
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34 n = recv(fd, buffer, len, 0);
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35 if (n < 0)
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36 return n;
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37
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38 if ((buffer[--n] != '\n') || (buffer[--n] != '\r'))
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39 return -1;
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40
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41 buffer[n] = '\0';
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42
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43 return n;
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44 }
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45
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46
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47 int command(int fd, char *frmt, ...)
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48 {
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49 int r, n;
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50 char buffer[1024];
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51 va_list v;
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52
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53 va_start(v, frmt);
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54 n = vsnprintf(buffer, sizeof(buffer) - 2, frmt, v);
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55 va_end(v);
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56
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57 r = msend(fd, buffer, n);
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58 if (r < 0)
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59 return r;
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60
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61 r = mrecv(fd, buffer, sizeof(buffer));
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62 if (r < 0)
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63 return r;
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64
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65 if (strcmp(buffer, "OK") != 0)
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66 return -1;
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67
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68 return 0;
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69 }