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annotate helpgen/cout.c @ 21:1c9dac05d040

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Add lint-style FALLTHROUGH annotations to fallthrough cases. (in the parse engine and thus the output code) Document this, because the old output causes warnings with gcc10.
author David A. Holland
date Mon, 13 Jun 2022 00:04:38 -0400
parents 13d2b8934445
children
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1 #include <assert.h>
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2 #include <stdio.h>
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3 #include <stdlib.h>
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4 #include <string.h>
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5
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6 #include "topic.h"
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7 #include "helpgen.h"
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8
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9 static void dumpstring(FILE *f, const char *s, int multiline) {
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10 int column = 0;
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11 unsigned char ch;
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12
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13 while (*s) {
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14 if (column == 0) {
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15 if (multiline) fprintf(f, " ");
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16 fprintf(f, "\"");
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17 }
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18 ch = *s++;
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19
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20 if (ch >= 32 && ch < 127 && ch != '"' && ch != '\\') {
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21 fprintf(f, "%c", ch);
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22 column++;
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23 }
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24 else if (ch == '\n') {
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25 fprintf(f, "\\n");
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26 column += 2;
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27 }
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28 else {
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29 assert(ch != '\r');
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30 fprintf(f, "\\%03o", ch);
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31 column += 4;
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32 }
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33
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34 if (multiline && column > 72) {
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35 fprintf(f, "\"\n");
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36 column = 0;
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37 }
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38 }
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39
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40 if (column) {
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41 fprintf(f, "\"");
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42 if (multiline) fprintf(f, "\n");
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43 }
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44 }
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45
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46 static void fcout(FILE *f, struct topic **topics, int ntopics) {
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47 int i, j, n;
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48 unsigned numentries = 0;
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49
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50 fprintf(f, "/* Automatically generated - do not edit */\n\n");
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51
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52 fprintf(f, "struct HelpTopic {\n");
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53 fprintf(f, " const char *title;\n");
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54 fprintf(f, " const char *body;\n");
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55 fprintf(f, "};\n\n");
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56
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57
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58 for (i=0; i<ntopics; i++) {
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59 struct topic *t = topics[i];
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60 const char *title = topic_gettitle(t, 0);
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61 const char *body = topic_getbody(t);
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62
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63 if (!body) body = "";
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64
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65 fprintf(f, "static const char body_%d[] = \n", i);
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66 dumpstring(f, body, 1 /* multiline */);
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67 fprintf(f, ";\n");
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68
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69 fprintf(f, "static const HelpTopic topic_%d = \n { ", i);
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70 dumpstring(f, title, 0 /* not multiline */);
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71 fprintf(f, ", body_%d };\n\n", i);
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72 }
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73
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74
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75 fprintf(f, "static const char *topiclist[] = {\n");
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76 for (i=0; i<ntopics; i++) {
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77 struct topic *t = topics[i];
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78 const char *title = topic_gettitle(t, 0);
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79
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80 fprintf(f, " ");
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81 dumpstring(f, title, 0 /* not multiline */);
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82 fprintf(f, ",\n");
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83 }
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84 fprintf(f, "};\n");
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85 fprintf(f, "static const unsigned numtopiclist = %d;\n\n", ntopics);
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86
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87
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88 fprintf(f, "struct helpentry {\n");
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89 fprintf(f, " const char *topic;\n");
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90 fprintf(f, " const HelpTopic *data;\n");
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91 fprintf(f, "};\n\n");
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92
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93 fprintf(f, "static helpentry helptable[] = {\n");
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94 for (i=0; i<ntopics; i++) {
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95 struct topic *t = topics[i];
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96
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97 n = topic_getnumtitles(t);
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98 for (j=0; j<n; j++) {
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99 fprintf(f, "{ ");
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100 dumpstring(f, topic_gettitle(t, j), 0 /* not multiline */);
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101 fprintf(f, ", &topic_%d },\n", i);
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102 numentries++;
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103 }
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104 }
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105 fprintf(f, "};\n");
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106 fprintf(f, "static const unsigned helptablenum = %u;\n\n", numentries);
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107 }
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108
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109 void cout(const char *file, struct topic **topics, int ntopics) {
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110 FILE *f;
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111
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112 f = fopen(file, "w");
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113 if (!f) {
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114 fprintf(stderr, "%s: fopen failed", file);
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115 exit(1);
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116 }
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117
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118 fcout(f, topics, ntopics);
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119
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120 if (ferror(f)) {
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121 fprintf(stderr, "%s: write error", file);
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122 exit(1);
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123 }
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124 if (fclose(f)) {
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125 fprintf(stderr, "%s: fclose failed", file);
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126 exit(1);
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127 }
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128 }