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292
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1 /*
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2 lwcc/cpp/main.c
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3
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4 Copyright © 2013 William Astle
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5
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6 This file is part of LWTOOLS.
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7
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8 LWTOOLS is free software: you can redistribute it and/or modify it under the
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9 terms of the GNU General Public License as published by the Free Software
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10 Foundation, either version 3 of the License, or (at your option) any later
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11 version.
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12
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13 This program is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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16 more details.
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17
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18 You should have received a copy of the GNU General Public License along with
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19 this program. If not, see <http://www.gnu.org/licenses/>.
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20 */
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21
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22 #include <errno.h>
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23 #include <stdio.h>
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24 #include <stdlib.h>
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25 #include <string.h>
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26
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27 #include <lw_stringlist.h>
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28 #include <lw_cmdline.h>
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29
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30 #include "cpp.h"
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31
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32 /* command line option handling */
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33 #define PROGVER "lwcc-cpp from " PACKAGE_STRING
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34 char *program_name;
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35
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36 /* input files */
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37 lw_stringlist_t input_files;
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38
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39 /* various flags */
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40 int trigraphs = 0;
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41 char *output_file = NULL;
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42 FILE *output_fp = NULL;
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43
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44 static struct lw_cmdline_options options[] =
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45 {
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46 { "output", 'o', "FILE", 0, "Output to FILE"},
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47 { "include", 'i', "FILE", 0, "Pre-include FILE" },
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48 { "includedir", 'I', "PATH", 0, "Add entry to the user include path" },
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49 { "sincludedir", 'S', "PATH", 0, "Add entry to the system include path" },
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50 { "define", 'D', "SYM[=VAL]",0, "Automatically define SYM to be VAL (or 1)"},
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51 { "trigraphs", 0x100, NULL, 0, "Enable interpretation of trigraphs" },
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52 { 0 }
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53 };
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54
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55
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56 static int parse_opts(int key, char *arg, void *state)
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57 {
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58 switch (key)
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59 {
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60 case 'o':
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61 if (output_file)
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62 do_error("Output file specified more than once.");
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63 output_file = arg;
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64 break;
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65
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66 case 0x100:
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67 trigraphs = 1;
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68 break;
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69
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70 case lw_cmdline_key_end:
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71 break;
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72
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73 case lw_cmdline_key_arg:
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74 lw_stringlist_addstring(input_files, arg);
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75 break;
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76
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77 default:
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78 return lw_cmdline_err_unknown;
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79 }
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80 return 0;
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81 }
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82
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83 static struct lw_cmdline_parser cmdline_parser =
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84 {
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85 options,
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86 parse_opts,
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87 "INPUTFILE",
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88 "lwcc-cpp - C preprocessor for lwcc",
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89 PROGVER
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90 };
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91
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92 int main(int argc, char **argv)
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93 {
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94 program_name = argv[0];
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95 int retval = 0;
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96
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97 input_files = lw_stringlist_create();
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98
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99 /* parse command line arguments */
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100 lw_cmdline_parse(&cmdline_parser, argc, argv, 0, 0, NULL);
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101
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102 /* set up output file */
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103 if (output_file == NULL || strcmp(output_file, "-") == 0)
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104 {
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105 output_fp = stdout;
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106 }
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107 else
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108 {
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109 output_fp = fopen(output_file, "wb");
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110 if (output_fp == NULL)
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111 {
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112 do_error("Failed to create output file %s: %s", output_file, strerror(errno));
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113 }
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114 }
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115
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116 if (lw_stringlist_nstrings(input_files) == 0)
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117 {
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118 /* if no input files, work on stdin */
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119 retval = process_file("-");
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120 }
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121 else
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122 {
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123 char *s;
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124 lw_stringlist_reset(input_files);
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125 for (s = lw_stringlist_current(input_files); s; s = lw_stringlist_next(input_files))
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126 {
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127 retval = process_file(s);
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128 if (retval != 0)
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129 break;
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130 }
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131 }
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132 lw_stringlist_destroy(input_files);
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133 exit(retval);
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134 }
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