Mercurial > repos > blastem
annotate config.c @ 1373:7cfc9d532e34
Fixed regression from VDP sync changes. Direct color DMA demos are now achieving stable sync again
author | Michael Pavone <pavone@retrodev.com> |
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date | Tue, 23 May 2017 23:17:24 -0700 |
parents | 4490c9c12272 |
children | 369da70ee2c2 |
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 |
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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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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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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; |
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74 if (*val) { |
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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); |
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78 } |
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79 *line = *line + 1; |
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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 |
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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 |
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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, "rb"); |
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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 } |
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102 char * config_data = malloc(config_size+1); |
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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'; |
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107 |
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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 |
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117 tern_node *parse_bundled_config(char *config_name) |
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118 { |
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119 uint32_t confsize; |
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120 char *confdata = read_bundled_file(config_name, &confsize); |
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121 tern_node *ret = NULL; |
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122 if (confdata) { |
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123 confdata[confsize] = 0; |
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124 ret = parse_config(confdata); |
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125 free(confdata); |
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126 } |
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127 return ret; |
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128 } |
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129 |
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130 tern_node *load_config() |
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131 { |
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132 char const *confdir = get_config_dir(); |
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133 char *confpath = NULL; |
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134 tern_node *ret; |
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135 if (confdir) { |
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136 confpath = alloc_concat(confdir, "/blastem.cfg"); |
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137 ret = parse_config_file(confpath); |
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138 if (ret) { |
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139 free(confpath); |
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140 return ret; |
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141 } |
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142 } |
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143 |
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144 ret = parse_bundled_config("default.cfg"); |
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145 if (ret) { |
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146 free(confpath); |
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147 return ret; |
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148 } |
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149 |
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150 if (confpath) { |
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151 fatal_error("Failed to find a config file at %s or in the blastem executable directory\n", confpath); |
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152 } else { |
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153 fatal_error("Failed to find a config file in the BlastEm executable directory and the config directory path could not be determined\n"); |
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154 } |
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155 //this will never get reached, but the compiler doesn't know that. Let's make it happy |
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156 return NULL; |
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157 } |