1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2023 Intel Corporation 4 */ 5 6 #define _GNU_SOURCE 7 #include <ctype.h> 8 #include <errno.h> 9 #include <stdbool.h> 10 #include <stdio.h> 11 #include <string.h> 12 13 #define HEADER \ 14 "// SPDX-License-Identifier: MIT\n" \ 15 "\n" \ 16 "/*\n" \ 17 " * DO NOT MODIFY.\n" \ 18 " *\n" \ 19 " * This file was generated from rules: %s\n" \ 20 " */\n" \ 21 "#ifndef _GENERATED_%s_\n" \ 22 "#define _GENERATED_%s_\n" \ 23 "\n" \ 24 "enum {\n" 25 26 #define FOOTER \ 27 "};\n" \ 28 "\n" \ 29 "#endif\n" 30 31 static void print_usage(FILE *f, const char *progname) 32 { 33 fprintf(f, "usage: %s <input-rule-file> <generated-c-source-file> <generated-c-header-file>\n", 34 progname); 35 } 36 37 static void print_parse_error(const char *err_msg, const char *line, 38 unsigned int lineno) 39 { 40 fprintf(stderr, "ERROR: %s\nERROR: %u: %.60s\n", 41 err_msg, lineno, line); 42 } 43 44 static char *strip(char *line, size_t linelen) 45 { 46 while (isspace(*(line + linelen))) 47 linelen--; 48 49 line[linelen - 1] = '\0'; 50 51 return line + strspn(line, " \f\n\r\t\v"); 52 } 53 54 #define MAX_LINE_LEN 4096 55 static int parse(FILE *input, FILE *csource, FILE *cheader, char *prefix) 56 { 57 char line[MAX_LINE_LEN + 1]; 58 char *name, *prev_name = NULL, *rules; 59 unsigned int lineno = 0, idx = 0; 60 61 while (fgets(line, sizeof(line), input)) { 62 size_t linelen; 63 bool is_continuation; 64 65 if (line[0] == '\0' || line[0] == '#' || line[0] == '\n') { 66 lineno++; 67 continue; 68 } 69 70 linelen = strlen(line); 71 if (linelen == MAX_LINE_LEN) { 72 print_parse_error("line too long", line, lineno); 73 return -EINVAL; 74 } 75 76 is_continuation = isspace(line[0]); 77 name = strip(line, linelen); 78 79 if (!is_continuation) { 80 name = strtok(name, " \t"); 81 rules = strtok(NULL, ""); 82 } else { 83 if (!prev_name) { 84 print_parse_error("invalid rule continuation", 85 line, lineno); 86 return -EINVAL; 87 } 88 89 rules = name; 90 name = NULL; 91 } 92 93 if (rules[0] == '\0') { 94 print_parse_error("invalid empty rule\n", line, lineno); 95 return -EINVAL; 96 } 97 98 if (name) { 99 fprintf(cheader, "\t%s_%s = %u,\n", prefix, name, idx); 100 101 /* Close previous entry before starting a new one */ 102 if (idx) 103 fprintf(csource, ") },\n"); 104 105 fprintf(csource, "{ XE_RTP_NAME(\"%s\"),\n XE_RTP_RULES(%s", 106 name, rules); 107 idx++; 108 } else { 109 fprintf(csource, ", OR,\n\t%s", rules); 110 } 111 112 lineno++; 113 if (!is_continuation) 114 prev_name = name; 115 } 116 117 /* Close last entry */ 118 if (idx) 119 fprintf(csource, ") },\n"); 120 121 fprintf(cheader, "\t_%s_COUNT = %u\n", prefix, idx); 122 123 return 0; 124 } 125 126 static int fn_to_prefix(const char *fn, char *prefix, size_t size) 127 { 128 size_t len; 129 130 fn = basename(fn); 131 len = strlen(fn); 132 133 if (len > size - 1) 134 return -ENAMETOOLONG; 135 136 memcpy(prefix, fn, len + 1); 137 138 for (char *p = prefix; *p; p++) { 139 switch (*p) { 140 case '.': 141 *p = '\0'; 142 return 0; 143 default: 144 *p = toupper(*p); 145 break; 146 } 147 } 148 149 return 0; 150 } 151 152 int main(int argc, const char *argv[]) 153 { 154 enum { 155 ARGS_INPUT, 156 ARGS_CSOURCE, 157 ARGS_CHEADER, 158 _ARGS_COUNT 159 }; 160 struct { 161 const char *fn; 162 const char *mode; 163 FILE *f; 164 } args[] = { 165 [ARGS_INPUT] = { .fn = argv[1], .mode = "r" }, 166 [ARGS_CSOURCE] = { .fn = argv[2], .mode = "w" }, 167 [ARGS_CHEADER] = { .fn = argv[3], .mode = "w" }, 168 }; 169 int ret = 1; 170 char prefix[128]; 171 172 if (argc < 3) { 173 fprintf(stderr, "ERROR: wrong arguments\n"); 174 print_usage(stderr, argv[0]); 175 return 1; 176 } 177 178 if (fn_to_prefix(args[ARGS_CHEADER].fn, prefix, sizeof(prefix)) < 0) 179 return 1; 180 181 for (int i = 0; i < _ARGS_COUNT; i++) { 182 args[i].f = fopen(args[i].fn, args[i].mode); 183 if (!args[i].f) { 184 fprintf(stderr, "ERROR: Can't open %s: %m\n", 185 args[i].fn); 186 goto err; 187 } 188 } 189 190 fprintf(args[ARGS_CHEADER].f, HEADER, args[ARGS_INPUT].fn, prefix, prefix); 191 192 ret = parse(args[ARGS_INPUT].f, args[ARGS_CSOURCE].f, 193 args[ARGS_CHEADER].f, prefix); 194 if (!ret) 195 fprintf(args[ARGS_CHEADER].f, FOOTER); 196 197 err: 198 for (int i = 0; i < _ARGS_COUNT; i++) { 199 if (args[i].f) 200 fclose(args[i].f); 201 } 202 203 return ret; 204 } 205