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5564 | serge | 1 | #!/usr/bin/python2 |
2 | # coding=utf-8 |
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3 | # -*- Mode: Python; py-indent-offset: 4 -*- |
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4 | # |
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5 | # Copyright © 2012 Intel Corporation |
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6 | # |
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7 | # Based on code by Kristian Høgsberg |
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8 | # extracted from mesa/main/get.c |
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9 | # |
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10 | # Permission is hereby granted, free of charge, to any person obtaining a |
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11 | # copy of this software and associated documentation files (the "Software"), |
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12 | # to deal in the Software without restriction, including without limitation |
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13 | # on the rights to use, copy, modify, merge, publish, distribute, sub |
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14 | # license, and/or sell copies of the Software, and to permit persons to whom |
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15 | # the Software is furnished to do so, subject to the following conditions: |
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16 | # |
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17 | # The above copyright notice and this permission notice (including the next |
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18 | # paragraph) shall be included in all copies or substantial portions of the |
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19 | # Software. |
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20 | # |
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21 | # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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22 | # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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23 | # FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
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24 | # IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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25 | # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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26 | # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
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27 | # IN THE SOFTWARE. |
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28 | |||
29 | # Generate a C header file containing hash tables of glGet parameter |
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30 | # names for each GL API. The generated file is to be included by glGet.c |
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31 | |||
32 | import os, sys, imp, getopt |
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33 | from collections import defaultdict |
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34 | import get_hash_params |
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35 | |||
36 | cur_dir = os.path.dirname(sys.argv[0]) |
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37 | param_desc_file = "%s/get_hash_params.py" % cur_dir |
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38 | |||
39 | GLAPI = "%s/../../mapi/glapi/gen" % cur_dir |
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40 | sys.path.append(GLAPI) |
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41 | import gl_XML |
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42 | |||
43 | prime_factor = 89 |
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44 | prime_step = 281 |
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45 | hash_table_size = 1024 |
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46 | |||
47 | gl_apis=set(["GL", "GL_CORE", "GLES", "GLES2", "GLES3"]) |
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48 | |||
49 | def print_header(): |
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50 | print "typedef const unsigned short table_t[%d];\n" % (hash_table_size) |
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51 | print "static const int prime_factor = %d, prime_step = %d;\n" % \ |
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52 | (prime_factor, prime_step) |
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53 | |||
54 | def print_params(params): |
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55 | print "static const struct value_desc values[] = {" |
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56 | for p in params: |
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57 | print " { %s, %s }," % (p[0], p[1]) |
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58 | |||
59 | print "};\n" |
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60 | |||
61 | def api_name(api): |
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62 | return "API_OPEN%s" % api |
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63 | |||
64 | # This must match gl_api enum in src/mesa/main/mtypes.h |
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65 | api_enum = [ |
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66 | 'GL', |
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67 | 'GLES', |
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68 | 'GLES2', |
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69 | 'GL_CORE', |
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70 | 'GLES3', # Not in gl_api enum in mtypes.h |
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71 | ] |
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72 | |||
73 | def api_index(api): |
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74 | return api_enum.index(api) |
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75 | |||
76 | def table_name(api): |
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77 | return "table_" + api_name(api) |
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78 | |||
79 | def print_table(api, table): |
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80 | print "static table_t %s = {" % (table_name(api)) |
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81 | |||
82 | # convert sparse (index, value) table into a dense table |
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83 | dense_table = [0] * hash_table_size |
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84 | for i, v in table: |
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85 | dense_table[i] = v |
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86 | |||
87 | row_size = 4 |
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88 | for i in range(0, hash_table_size, row_size): |
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89 | row = dense_table[i : i + row_size] |
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90 | idx_val = ["%4d" % v for v in row] |
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91 | print " " * 4 + ", ".join(idx_val) + "," |
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92 | |||
93 | print "};\n" |
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94 | |||
95 | def print_tables(tables): |
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96 | for table in tables: |
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97 | print_table(table["apis"][0], table["indices"]) |
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98 | |||
99 | dense_tables = ['NULL'] * len(api_enum) |
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100 | for table in tables: |
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101 | tname = table_name(table["apis"][0]) |
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102 | for api in table["apis"]: |
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103 | i = api_index(api) |
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104 | dense_tables[i] = "&%s" % (tname) |
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105 | |||
106 | print "static table_t *table_set[] = {" |
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107 | for expr in dense_tables: |
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108 | print " %s," % expr |
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109 | print "};\n" |
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110 | |||
111 | print "#define table(api) (*table_set[api])" |
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112 | |||
113 | # Merge tables with matching parameter lists (i.e. GL and GL_CORE) |
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114 | def merge_tables(tables): |
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115 | merged_tables = [] |
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116 | for api, indices in sorted(tables.items()): |
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117 | matching_table = filter(lambda mt:mt["indices"] == indices, |
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118 | merged_tables) |
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119 | if matching_table: |
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120 | matching_table[0]["apis"].append(api) |
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121 | else: |
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122 | merged_tables.append({"apis": [api], "indices": indices}) |
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123 | |||
124 | return merged_tables |
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125 | |||
126 | def add_to_hash_table(table, hash_val, value): |
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127 | while True: |
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128 | index = hash_val & (hash_table_size - 1) |
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129 | if index not in table: |
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130 | table[index] = value |
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131 | break |
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132 | hash_val += prime_step |
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133 | |||
134 | def die(msg): |
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135 | sys.stderr.write("%s: %s\n" % (program, msg)) |
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136 | exit(1) |
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137 | |||
138 | program = os.path.basename(sys.argv[0]) |
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139 | |||
140 | def generate_hash_tables(enum_list, enabled_apis, param_descriptors): |
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141 | tables = defaultdict(lambda:{}) |
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142 | |||
143 | # the first entry should be invalid, so that get.c:find_value can use |
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144 | # its index for the 'enum not found' condition. |
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145 | params = [[0, ""]] |
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146 | |||
147 | for param_block in param_descriptors: |
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148 | if set(["apis", "params"]) != set(param_block): |
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149 | die("missing fields (%s) in param descriptor file (%s)" % |
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150 | (", ".join(set(["apis", "params"]) - set(param_block)), |
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151 | param_desc_file)) |
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152 | |||
153 | valid_apis = set(param_block["apis"]) |
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154 | if valid_apis - gl_apis: |
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155 | die("unknown API(s) in param descriptor file (%s): %s\n" % |
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156 | (param_desc_file, ",".join(valid_apis - gl_apis))) |
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157 | |||
158 | if not (valid_apis & enabled_apis): |
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159 | continue |
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160 | |||
161 | valid_apis &= enabled_apis |
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162 | |||
163 | for param in param_block["params"]: |
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164 | enum_name = param[0] |
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165 | enum_val = enum_list[enum_name].value |
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166 | hash_val = enum_val * prime_factor |
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167 | |||
168 | for api in valid_apis: |
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169 | add_to_hash_table(tables[api], hash_val, len(params)) |
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170 | # Also add GLES2 items to the GLES3 hash table |
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171 | if api == "GLES2": |
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172 | add_to_hash_table(tables["GLES3"], hash_val, len(params)) |
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173 | |||
174 | params.append(["GL_" + enum_name, param[1]]) |
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175 | |||
176 | sorted_tables={} |
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177 | for api, indices in tables.items(): |
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178 | sorted_tables[api] = sorted(indices.items()) |
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179 | |||
180 | return params, merge_tables(sorted_tables) |
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181 | |||
182 | |||
183 | def show_usage(): |
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184 | sys.stderr.write( |
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185 | """Usage: %s [OPTIONS] |
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186 | -f |
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187 | """ % (program)) |
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188 | exit(1) |
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189 | |||
190 | if __name__ == '__main__': |
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191 | try: |
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192 | (opts, args) = getopt.getopt(sys.argv[1:], "f:") |
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193 | except Exception,e: |
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194 | show_usage() |
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195 | |||
196 | if len(args) != 0: |
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197 | show_usage() |
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198 | |||
199 | api_desc_file = "" |
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200 | |||
201 | for opt_name, opt_val in opts: |
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202 | if opt_name == "-f": |
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203 | api_desc_file = opt_val |
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204 | |||
205 | if not api_desc_file: |
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206 | die("missing descriptor file (-f)\n") |
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207 | |||
208 | # generate the code for all APIs |
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209 | enabled_apis = set(["GLES", "GLES2", "GLES3", "GL", "GL_CORE"]) |
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210 | |||
211 | try: |
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212 | api_desc = gl_XML.parse_GL_API(api_desc_file) |
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213 | except Exception: |
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214 | die("couldn't parse API specification file %s\n" % api_desc_file) |
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215 | |||
216 | (params, hash_tables) = generate_hash_tables(api_desc.enums_by_name, |
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217 | enabled_apis, get_hash_params.descriptor) |
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218 | |||
219 | print_header() |
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220 | print_params(params) |
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221 | print_tables(hash_tables) |