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annotate config.c @ 766:1b2f8280ba81

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WIP changes to support reading cart memory map from ROM DB
author Michael Pavone <pavone@retrodev.com>
date Sun, 05 Jul 2015 14:21:34 -0700
parents 2e1b3b258523
children 724bbec47f86 bce97fc0bb8a
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 _WIN32
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13 char * strtok_r(char * input, char * sep, char ** state)
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14 {
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15 if (input) {
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16 *state = input;
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17 }
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18 char * ret = *state;
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19 while (**state && **state != *sep)
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20 {
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21 ++*state;
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22 }
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23 if (**state)
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24 {
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25 **state = 0;
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26 ++*state;
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27 return ret;
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28 }
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29 return NULL;
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30 }
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31 #endif
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32
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33 tern_node * parse_config_int(char **state, int started, int *line)
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34 {
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35 char *config_data, *curline;
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36 tern_node * head = NULL;
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37 config_data = started ? NULL : *state;
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38 while ((curline = strtok_r(config_data, "\n", state)))
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39 {
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40
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41 config_data = NULL;
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42 curline = strip_ws(curline);
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43 int len = strlen(curline);
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44 if (!len) {
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45 *line++;
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46 continue;
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47 }
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48 if (curline[0] == '#') {
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49 *line++;
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50 continue;
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51 }
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52 if (curline[0] == '}') {
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53 if (started) {
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54 return head;
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55 }
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56 fprintf(stderr, "unexpected } on line %d\n", *line);
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57 exit(1);
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58 }
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59
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60 char * end = curline + len - 1;
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61 if (*end == '{') {
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62 *end = 0;
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63 curline = strip_ws(curline);
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64 *line++;
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65 head = tern_insert_node(head, curline, parse_config_int(state, 1, line));
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66 } else {
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67 char * val = strip_ws(split_keyval(curline));
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68 char * key = curline;
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69 if (*val) {
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440efd7d27a9 Read key bindings from config file
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70 head = tern_insert_ptr(head, key, strdup(val));
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71 } else {
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72 fprintf(stderr, "Key %s is missing a value on line %d\n", key, *line);
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73 }
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74 *line++;
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75 }
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76 }
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77 return head;
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78 }
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79
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80 tern_node * parse_config(char * config_data)
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81 {
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82 int line = 1;
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83 return parse_config_int(&config_data, 0, &line);
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84 }
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85
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86 tern_node * parse_config_file(char * config_path)
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87 {
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88 tern_node * ret = NULL;
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89 FILE * config_file = fopen(config_path, "r");
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90 if (!config_file) {
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91 goto open_fail;
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92 }
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93 long config_size = file_size(config_file);
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94 if (!config_size) {
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95 goto config_empty;
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96 }
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97 char * config_data = malloc(config_size);
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98 if (fread(config_data, 1, config_size, config_file) != config_size) {
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99 goto config_read_fail;
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100 }
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101 ret = parse_config(config_data);
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102 config_read_fail:
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103 free(config_data);
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104 config_empty:
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105 fclose(config_file);
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106 open_fail:
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107 return ret;
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108 }
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109
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110 tern_node * load_config()
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111 {
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112 char * exe_dir;
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113 char * home = get_home_dir();
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114 if (!home) {
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115 goto load_in_app_dir;
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116 }
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117 char * path = alloc_concat(home, "/.config/blastem/blastem.cfg");
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118 tern_node * ret = parse_config_file(path);
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119 if (ret) {
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120 goto success;
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121 }
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122 free(path);
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123 load_in_app_dir:
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124 exe_dir = get_exe_dir();
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125 if (!exe_dir) {
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126 goto no_config;
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127 }
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128 path = alloc_concat(exe_dir, "/default.cfg");
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129 ret = parse_config_file(path);
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130 free(path);
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131 success:
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132 if (ret) {
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133 return ret;
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134 }
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135 no_config:
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136 fputs("Failed to find a config file in ~/.config/blastem/blastem.cfg or in the blastem executable directory\n", stderr);
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137 exit(1);
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138 }
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139