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annotate config.c @ 800:ec23202df6a6

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Minor cleanup
author Michael Pavone <pavone@retrodev.com>
date Sun, 26 Jul 2015 13:33:48 -0700
parents 0b692b5d154b
children 7ed55a361e79
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2 Copyright 2013 Michael Pavone
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3 This file is part of BlastEm.
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
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5 */
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6 #include "tern.h"
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7 #include "util.h"
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8 #include <stdio.h>
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9 #include <stdlib.h>
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10 #include <string.h>
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11
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12 #ifdef __MINGW64_VERSION_MAJOR
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13 #define MINGW_W64_VERSION (__MINGW64_VERSION_MAJOR * 1000 + __MINGW64_VERSION_MINOR)
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14 #else
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15 #define MINGW_W64_VERSION 0
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16 #endif
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17
bce97fc0bb8a Fix mingw-w64 build and cross-compilation
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18 #if defined(_WIN32) && (MINGW_W64_VERSION < 3003)
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19 char * strtok_r(char * input, char * sep, char ** state)
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20 {
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21 if (input) {
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22 *state = input;
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23 }
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24 char * ret = *state;
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25 while (**state && **state != *sep)
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26 {
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27 ++*state;
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28 }
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29 if (**state)
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30 {
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31 **state = 0;
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32 ++*state;
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33 return ret;
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34 }
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35 return NULL;
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36 }
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37 #endif
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38
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39 tern_node * parse_config_int(char **state, int started, int *line)
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40 {
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41 char *config_data, *curline;
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42 tern_node * head = NULL;
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43 config_data = started ? NULL : *state;
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44 while ((curline = strtok_r(config_data, "\n", state)))
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45 {
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46
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47 config_data = NULL;
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48 curline = strip_ws(curline);
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49 int len = strlen(curline);
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50 if (!len) {
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51 *line = *line + 1;
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52 continue;
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53 }
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54 if (curline[0] == '#') {
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55 *line = *line + 1;
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56 continue;
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57 }
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58 if (curline[0] == '}') {
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59 if (started) {
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60 return head;
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61 }
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724bbec47f86 Use a new fatal_error function instead of calling fprintf and exit for fatal errors. This new function more gracefully handles the case in which BlastEm was not started from a terminal or disconnected from ther terminal (Windows).
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62 fatal_error("unexpected } on line %d\n", *line);
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63 }
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64
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65 char * end = curline + len - 1;
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66 if (*end == '{') {
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67 *end = 0;
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68 curline = strip_ws(curline);
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41f73c76b978 Fix some memory issues
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69 *line = *line + 1;
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70 head = tern_insert_node(head, curline, parse_config_int(state, 1, line));
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71 } else {
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72 char * val = strip_ws(split_keyval(curline));
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73 char * key = curline;
766
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74 if (*val) {
431
440efd7d27a9 Read key bindings from config file
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75 head = tern_insert_ptr(head, key, strdup(val));
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76 } else {
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77 fprintf(stderr, "Key %s is missing a value on line %d\n", key, *line);
430
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78 }
796
41f73c76b978 Fix some memory issues
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79 *line = *line + 1;
430
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80 }
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81 }
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82 return head;
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83 }
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84
766
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85 tern_node * parse_config(char * config_data)
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86 {
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87 int line = 1;
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88 return parse_config_int(&config_data, 0, &line);
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89 }
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90
430
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91 tern_node * parse_config_file(char * config_path)
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92 {
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93 tern_node * ret = NULL;
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94 FILE * config_file = fopen(config_path, "r");
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95 if (!config_file) {
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96 goto open_fail;
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97 }
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98 long config_size = file_size(config_file);
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99 if (!config_size) {
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100 goto config_empty;
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101 }
796
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102 char * config_data = malloc(config_size+1);
430
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103 if (fread(config_data, 1, config_size, config_file) != config_size) {
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104 goto config_read_fail;
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105 }
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106 config_data[config_size] = '\0';
41f73c76b978 Fix some memory issues
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107
430
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108 ret = parse_config(config_data);
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109 config_read_fail:
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110 free(config_data);
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111 config_empty:
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112 fclose(config_file);
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113 open_fail:
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114 return ret;
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115 }
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116
496
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117 tern_node * load_config()
430
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118 {
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119 char * exe_dir;
742
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120 char * home = get_home_dir();
430
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121 if (!home) {
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122 goto load_in_app_dir;
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123 }
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124 char * path = alloc_concat(home, "/.config/blastem/blastem.cfg");
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125 tern_node * ret = parse_config_file(path);
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126 if (ret) {
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127 goto success;
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128 }
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129 free(path);
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130 load_in_app_dir:
496
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131 exe_dir = get_exe_dir();
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132 if (!exe_dir) {
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133 goto no_config;
430
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134 }
496
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135 path = alloc_concat(exe_dir, "/default.cfg");
430
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136 ret = parse_config_file(path);
496
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137 free(path);
430
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138 success:
496
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139 if (ret) {
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140 return ret;
430
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141 }
496
6fc71114d145 Extract function to determine executable directory from load_config so it can be used elsewhere
Mike Pavone <pavone@retrodev.com>
parents: 495
diff changeset
142 no_config:
792
724bbec47f86 Use a new fatal_error function instead of calling fprintf and exit for fatal errors. This new function more gracefully handles the case in which BlastEm was not started from a terminal or disconnected from ther terminal (Windows).
Michael Pavone <pavone@retrodev.com>
parents: 766
diff changeset
143 fatal_error("Failed to find a config file in ~/.config/blastem/blastem.cfg or in the blastem executable directory\n");
724bbec47f86 Use a new fatal_error function instead of calling fprintf and exit for fatal errors. This new function more gracefully handles the case in which BlastEm was not started from a terminal or disconnected from ther terminal (Windows).
Michael Pavone <pavone@retrodev.com>
parents: 766
diff changeset
144 //this will never get reached, but the compiler doesn't know that. Let's make it happy
724bbec47f86 Use a new fatal_error function instead of calling fprintf and exit for fatal errors. This new function more gracefully handles the case in which BlastEm was not started from a terminal or disconnected from ther terminal (Windows).
Michael Pavone <pavone@retrodev.com>
parents: 766
diff changeset
145 return NULL;
430
7f84090ab1cd Add config file parser and default config file
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
146 }
7f84090ab1cd Add config file parser and default config file
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
147