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20
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1 #include <unistd.h>
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2 #include <fcntl.h>
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3 #include <err.h>
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4
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5 #include "utils.h"
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6 #include "mode.h"
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21
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7 #include "place.h"
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20
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8 #include "output.h"
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9
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10 static int outputfd = -1;
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21
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11 static bool incomment = false;
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20
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12
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13 static
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14 void
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15 output_open(void)
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16 {
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17 outputfd = open(mode.output_file, O_WRONLY|O_CREAT|O_TRUNC, 0664);
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18 if (outputfd < 0) {
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19 warn("%s", mode.output_file);
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20 die();
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21 }
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22 }
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23
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21
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24 static
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20
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25 void
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26 dowrite(const char *buf, size_t len)
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20
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27 {
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28 size_t done;
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29 ssize_t result;
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30 static unsigned write_errors = 0;
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31
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32 if (!mode.do_output) {
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33 return;
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34 }
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35
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36 if (outputfd < 0) {
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37 output_open();
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38 }
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39
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40 /* XXX this will often come by ones and twos, should buffer */
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41
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42 done = 0;
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43 while (done < len) {
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44 result = write(outputfd, buf+done, len-done);
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45 if (result == -1) {
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46 warn("%s: write", mode.output_file);
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47 complain_failed();
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48 write_errors++;
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49 if (write_errors > 5) {
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50 warnx("%s: giving up", mode.output_file);
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51 die();
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52 }
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53 /* XXX is this really a good idea? */
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54 sleep(1);
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55 }
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56 done += (size_t)result;
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57 }
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58 }
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59
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60 void
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21
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61 output(const struct place *p, const char *buf, size_t len)
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62 {
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63 size_t pos, start;
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64 struct place p2;
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65
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66 start = 0;
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67 for (pos = 0; pos < len - 1; pos++) {
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68 if (buf[pos] == '/' && buf[pos+1] == '*') {
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69 if (incomment && warns.nestcomment) {
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70 p2 = *p;
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71 p2.column += pos;
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72 complain(p, "Warning: %c%c within comment",
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73 '/', '*');
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74 if (mode.werror) {
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75 complain_failed();
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76 }
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77 } else if (!incomment) {
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78 if (pos > start) {
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79 dowrite(buf + start, pos - start);
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80 }
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81 start = pos;
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82 pos += 2;
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83 incomment = true;
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84 /* cancel out the loop's pos++ */
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85 pos--;
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86 continue;
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87 }
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88 } else if (buf[pos] == '*' && buf[pos+1] == '/') {
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89 if (incomment) {
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90 pos += 2;
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91 if (mode.output_retain_comments) {
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92 dowrite(buf + start, pos - start);
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93 }
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94 start = pos;
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95 pos += 2;
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96 incomment = false;
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97 /* cancel out the loop's pos++ */
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98 pos--;
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99 continue;
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100 }
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101 }
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102 }
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103 }
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104
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105 void
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20
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106 output_eof(void)
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107 {
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108 if (outputfd >= 0) {
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109 close(outputfd);
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110 }
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111 outputfd = -1;
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112 }
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