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70
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1 /* Generate .po file from doc-string file.
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2
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3 Scan specified doc-string file, creating .po format messages for processing
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4 with msgfmt. The results go to standard output or to a file specified
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5 with -a or -o (-a to append, -o to start from nothing).
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6
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7 Kludge to make up for shortcoming in make-docfile and Snarf-documentation:
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8 If arg before input filename is -p, we are scanning an add-on
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9 package, which requires slightly different processing.
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10 */
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11
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12 #include <stdio.h>
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13 #include <stdlib.h>
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14
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15 #ifndef EXIT_SUCCESS
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16 #define EXIT_SUCCESS 0
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17 #define EXIT_FAILURE 1
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18 #endif
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19
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20 /* #define BUFSIZE 8192 */
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21 #define BUFSIZE 16384
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22 #define NEWSTRING 31 /* Character signalling start of new doc string */
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23 #define LINEEND "\\n"
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24 #define ENDSTRING "\"\n"
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25 #define LINEBEGIN " \""
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26 #define LINEBREAK ENDSTRING LINEBEGIN
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27
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28 /* some brain-dead headers define this ... */
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29 #undef FALSE
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30 #undef TRUE
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31 enum boolean { FALSE, TRUE };
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32
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33
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34 /***********************/
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35 /* buffer pseudo-class */
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36 /***********************/
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37
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38 typedef struct _buffer
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39 {
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40 size_t index; /* current position in buf[] */
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41 size_t size; /* size of buf */
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42 char *buf;
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43 } buffer_struct;
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44
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45 #define BUF_NULL {0, 0, NULL}
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46
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47 int buf_init (buffer_struct *buffer, size_t size);
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48 void buf_free (buffer_struct *buffer);
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49 void buf_clear (buffer_struct *buffer);
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50 int buf_putc (buffer_struct *buffer, int c);
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51 int buf_print (buffer_struct *buffer, const char *s);
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52
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53
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54 /********************/
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55 /* global variables */
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56 /********************/
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57
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58 FILE *infile = NULL;
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59 FILE *outfile = NULL;
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60 buffer_struct buf = BUF_NULL;
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61
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62
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63 void scan_file (enum boolean package);
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64 void initialize (void);
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65 void clean_exit (int status);
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66 void buf_putc_safe (int c);
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67 void buf_print_safe (const char *s);
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68 void terminate_string (void);
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69
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70 main (int argc, char *argv[])
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71 {
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72 register int i;
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73 enum boolean package = FALSE; /* TRUE if scanning add-on package */
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74
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75 initialize ();
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76
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77 outfile = stdout;
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78
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79 /* If first two args are -o FILE, output to FILE. */
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80 i = 1;
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81 if (argc > i + 1 && strcmp (argv[i], "-o") == 0) {
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82 outfile = fopen (argv[++i], "w");
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83 ++i;
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84 }
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85 /* ...Or if args are -a FILE, append to FILE. */
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86 if (argc > i + 1 && strcmp (argv[i], "-a") == 0) {
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87 outfile = fopen (argv[++i], "a");
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88 ++i;
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89 }
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90 if (!outfile) {
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91 fprintf (stderr, "Unable to open output file %s\n", argv[--i]);
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92 return 1;
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93 }
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94
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95 if (argc > i && !strcmp (argv[i], "-p")) {
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96 package = TRUE;
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97 ++i;
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98 }
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99
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100 infile = fopen (argv[i], "r");
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101 if (!infile) {
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102 fprintf (stderr, "Unable to open input file %s\n", argv[i]);
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103 return 1;
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104 }
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105
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106 scan_file (package);
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107 clean_exit (EXIT_SUCCESS);
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108 }
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109
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110
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111 void scan_file (enum boolean package)
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112 {
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113 register int c; /* Character read in */
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114
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115 fprintf (outfile, "###############\n");
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116 fprintf (outfile, "# DOC strings #\n");
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117 fprintf (outfile, "###############\n");
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118
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119 while (c = getc (infile), !feof (infile)) {
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120 if (c == NEWSTRING) {
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121 /* If a string was being processed, terminate it. */
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122 if (buf.index > 0)
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123 terminate_string ();
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124
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125 /* Skip function or variable name. */
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126 while (c != '\n')
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127 c = getc (infile);
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128 c = getc (infile);
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129
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130 /* Begin a new string. */
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131 fprintf (outfile, "msgid \"");
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132 buf_print_safe ("msgstr \"");
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133 }
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134
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135 if (c == '\n') {
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136 /* Peek at next character. */
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137 c = getc (infile);
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138 ungetc (c, infile);
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139
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140 /* For add-on (i.e., non-preloaded) documentation, ignore the last
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141 carriage return of a string. */
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142 if (!(package && c == NEWSTRING)) {
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143 fprintf (outfile, LINEEND);
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144 buf_print_safe (LINEEND);
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145 }
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146
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147 /* If not end of string, continue it on the next line. */
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148 if (c != NEWSTRING) {
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149 fprintf (outfile, LINEBREAK);
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150 buf_print_safe (LINEBREAK);
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151 }
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152 }
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153 else {
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154
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155 /* If character is \ or ", precede it by a backslash. */
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156 if (c == '\\' || c == '\"') {
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157 putc ('\\', outfile);
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158 buf_putc_safe ('\\');
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159 }
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160
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161 putc (c, outfile);
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162 buf_putc_safe (c);
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163 }
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164 }
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165 terminate_string ();
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166 }
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167
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168
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169 /* initialize sets up the global variables.
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170 */
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171 void initialize (void)
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172 {
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173 if (buf_init (&buf, BUFSIZE) != 0)
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174 clean_exit (EXIT_FAILURE);
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175 }
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176
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177
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178 /* clean_exit returns any resources and terminates the program.
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179 An error message is printed if status is EXIT_FAILURE.
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180 */
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181 void clean_exit (int status)
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182 {
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183 if (buf.size > 0)
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184 buf_free (&buf);
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185 if (outfile)
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186 fclose (outfile);
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187 if (infile)
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188 fclose (infile);
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189
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190 if (status == EXIT_FAILURE)
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191 fprintf (stderr, "make-po abnormally terminated\n");
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192 exit (status);
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193 }
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194
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195
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196 /* buf_putc_safe writes the character c on the global buffer buf,
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197 checking to make sure that the operation was successful.
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198 */
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199 void buf_putc_safe (int c)
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200 {
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201 register int status;
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202
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203 status = buf_putc (&buf, c);
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204 if (status == EOF)
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205 clean_exit (EXIT_FAILURE);
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206 }
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207
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208
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209 /* buf_putc_safe writes the string s on the global buffer buf,
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210 checking to make sure that the operation was successful.
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211 */
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212 void buf_print_safe (const char *s)
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213 {
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214 register int status;
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215
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216 status = buf_print (&buf, s);
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217 if (status < 0)
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218 clean_exit (EXIT_FAILURE);
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219 }
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220
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221
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222 /* terminate_string terminates the current doc string and outputs the buffer.
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223 */
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224 void terminate_string (void)
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225 {
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226 fprintf (outfile, ENDSTRING);
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227
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228 /* Make the "translation" different from the original string. */
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229 buf_print_safe ("_X");
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230
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231 buf_print_safe (ENDSTRING);
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232 fprintf (outfile, "%s", buf.buf);
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233 buf_clear (&buf);
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234 }
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235
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236
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237 /*********************************/
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238 /* buffer pseudo-class functions */
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239 /*********************************/
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240
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241 /* buf_init initializes a buffer to the specified size.
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242 It returns non-zero if the attempt fails.
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243 */
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244 int buf_init (buffer_struct *buffer, size_t size)
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245 {
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246 buffer->buf = malloc (size);
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247 if (buffer->buf == NULL)
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248 return 1;
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249
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250 buffer->size = size;
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251 buf_clear (buffer);
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252 return 0;
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253 }
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254
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255
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256 /* buf_free releases the memory allocated for the buffer.
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257 */
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258 void buf_free (buffer_struct *buffer)
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259 {
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260 free (buffer->buf);
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261 buffer->size = 0;
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262 }
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263
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264
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265 /* buf_clear resets a buffer to an empty string.
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266 */
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267 void buf_clear (buffer_struct *buffer)
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268 {
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269 buffer->index = 0;
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270 buffer->buf[0] = '\0';
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271 }
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272
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273
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274 /* buf_putc writes the character c on the buffer.
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275 It returns the character written, or EOF for error.
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276 */
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277 int buf_putc (buffer_struct *buffer, int c)
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278 {
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279 if (buffer->index >= buffer->size)
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280 return EOF;
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281
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282 buffer->buf[buffer->index++] = c;
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283 return c;
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284 }
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285
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286
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287 /* buf_print writes the string s on the buffer.
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288 It returns the number of characters written, or negative if an error occurred.
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289 */
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290 int buf_print (buffer_struct *buffer, const char *s)
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291 {
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292 register int len;
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293
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294 len = strlen (s);
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295 if (buffer->index + len >= buffer->size)
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296 return -1;
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297
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298 sprintf (&(buffer->buf[buffer->index]), s);
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299 buffer->index += len;
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300 return len;
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301 }
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