/* *------------------------------------------------------------------ * lex.c - API generator lexical analyzer * * Copyright (c) 1996-2009 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *------------------------------------------------------------------ */ #include #include #include #include #include #include #include "lex.h" #include "node.h" #include "tools/vppapigen/gram.h" FILE *ifp, *ofp, *pythonfp, *jsonfp; char *vlib_app_name = "vpp"; int dump_tree; time_t starttime; char *input_filename; char *current_filename; int current_filename_allocated; unsigned long input_crc; unsigned long message_crc; int yydebug; /* * lexer variable definitions */ static const char *version = "0.1"; static int the_lexer_linenumber = 1; static enum lex_state the_lexer_state = START_STATE; /* * private prototypes */ static void usage (char *); static int name_check (const char *, YYSTYPE *); static int name_compare (const char *, const char *); extern int yydebug; extern YYSTYPE yylval; unsigned int crc32c_table[256] = { 0x00000000, 0xF26B8303, 0xE13B70F7, 0x1350F3F4, 0xC79A971F, 0x35F1141C, 0x26A1E7E8, 0xD4CA64EB, 0x8AD958CF, 0x78B2DBCC, 0x6BE22838, 0x9989AB3B, 0x4D43CFD0, 0xBF284CD3, 0xAC78BF27, 0x5E133C24, 0x105EC76F, 0xE235446C, 0xF165B798, 0x030E349B, 0xD7C45070, 0x25AFD373, 0x36FF2087, 0xC494A384, 0x9A879FA0, 0x68EC1CA3, 0x7BBCEF57, 0x89D76C54, 0x5D1D08BF, 0xAF768BBC, 0xBC267848, 0x4E4DFB4B, 0x20BD8EDE, 0xD2D60DDD, 0xC186FE29, 0x33ED7D2A, 0xE72719C1, 0x154C9AC2, 0x061C6936, 0xF477EA35, 0xAA64D611, 0x580F5512, 0x4B5FA6E6, 0xB93425E5, 0x6DFE410E, 0x9F95C20D, 0x8CC531F9, 0x7EAEB2FA, 0x30E349B1, 0xC288CAB2, 0xD1D83946, 0x23B3BA45, 0xF779DEAE, 0x05125DAD, 0x1642AE59, 0xE4292D5A, 0xBA3A117E, 0x4851927D, 0x5B016189, 0xA96AE28A, 0x7DA08661, 0x8FCB0562, 0x9C9BF696, 0x6EF07595, 0x417B1DBC, 0xB3109EBF, 0xA0406D4B, 0x522BEE48, 0x86E18AA3, 0x748A09A0, 0x67DAFA54, 0x95B17957, 0xCBA24573, 0x39C9C670, 0x2A993584, 0xD8F2B687, 0x0C38D26C, 0xFE53516F, 0xED03A29B, 0x1F682198, 0x5125DAD3, 0xA34E59D0, 0xB01EAA24, 0x42752927, 0x96BF4DCC, 0x64D4CECF, 0x77843D3B, 0x85EFBE38, 0xDBFC821C, 0x2997011F, 0x3AC7F2EB, 0xC8AC71E8, 0x1C661503, 0xEE0D9600, 0xFD5D65F4, 0x0F36E6F7, 0x61C69362, 0x93AD1061, 0x80FDE395, 0x72966096, 0xA65C047D, 0x5437877E, 0x4767748A, 0xB50CF789, 0xEB1FCBAD, 0x197448AE, 0x0A24BB5A, 0xF84F3859, 0x2C855CB2, 0xDEEEDFB1, 0xCDBE2C45, 0x3FD5AF46, 0x7198540D, 0x83F3D70E, 0x90A324FA, 0x62C8A7F9, 0xB602C312, 0x44694011, 0x5739B3E5, 0xA55230E6, 0xFB410CC2, 0x092A8FC1, 0x1A7A7C35, 0xE811FF36, 0x3CDB9BDD, 0xCEB018DE, 0xDDE0EB2A, 0x2F8B6829, 0x82F63B78, 0x709DB87B, 0x63CD4B8F, 0x91A6C88C, 0x456CAC67, 0xB7072F64, 0xA457DC90, 0x563C5F93, 0x082F63B7, 0xFA44E0B4, 0xE9141340, 0x1B7F9043, 0xCFB5F4A8, 0x3DDE77AB, 0x2E8E845F, 0xDCE5075C, 0x92A8FC17, 0x60C37F14, 0x73938CE0, 0x81F80FE3, 0x55326B08, 0xA759E80B, 0xB4091BFF, 0x466298FC, 0x1871A4D8, 0xEA1A27DB, 0xF94AD42F, 0x0B21572C, 0xDFEB33C7, 0x2D80B0C4, 0x3ED04330, 0xCCBBC033, 0xA24BB5A6, 0x502036A5, 0x4370C551, 0xB11B4652, 0x65D122B9, 0x97BAA1BA, 0x84EA524E, 0x7681D14D, 0x2892ED69, 0xDAF96E6A, 0xC9A99D9E, 0x3BC21E9D, 0xEF087A76, 0x1D63F975, 0x0E330A81, 0xFC588982, 0xB21572C9, 0x407EF1CA, 0x532E023E, 0xA145813D, 0x758FE5D6, 0x87E466D5, 0x94B49521, 0x66DF1622, 0x38CC2A06, 0xCAA7A905, 0xD9F75AF1, 0x2B9CD9F2, 0xFF56BD19, 0x0D3D3E1A, 0x1E6DCDEE, 0xEC064EED, 0xC38D26C4, 0x31E6A5C7, 0x22B65633, 0xD0DDD530, 0x0417B1DB, 0xF67C32D8, 0xE52CC12C, 0x1747422F, 0x49547E0B, 0xBB3FFD08, 0xA86F0EFC, 0x5A048DFF, 0x8ECEE914, 0x7CA56A17, 0x6FF599E3, 0x9D9E1AE0, 0xD3D3E1AB, 0x21B862A8, 0x32E8915C, 0xC083125F, 0x144976B4, 0xE622F5B7, 0xF5720643, 0x07198540, 0x590AB964, 0xAB613A67, 0xB831C993, 0x4A5A4A90, 0x9E902E7B, 0x6CFBAD78, 0x7FAB5E8C, 0x8DC0DD8F, 0xE330A81A, 0x115B2B19, 0x020BD8ED, 0xF0605BEE, 0x24AA3F05, 0xD6C1BC06, 0xC5914FF2, 0x37FACCF1, 0x69E9F0D5, 0x9B8273D6, 0x88D28022, 0x7AB90321, 0xAE7367CA, 0x5C18E4C9, 0x4F48173D, 0xBD23943E, 0xF36E6F75, 0x0105EC76, 0x12551F82, 0xE03E9C81, 0x34F4F86A, 0xC69F7B69, 0xD5CF889D, 0x27A40B9E, 0x79B737BA, 0x8BDCB4B9, 0x988C474D, 0x6AE7C44E, 0xBE2DA0A5, 0x4C4623A6, 0x5F16D052, 0xAD7D5351 }; static inline unsigned long CRC8 (unsigned long crc, unsigned char d) { return ((crc >> 8) ^ crc32c_table[(crc ^ d) & 0xFF]); } static inline unsigned long CRC16 (unsigned long crc, unsigned short d) { crc = CRC8 (crc, d & 0xff); d = d >> 8; crc = CRC8 (crc, d & 0xff); return crc; } static unsigned long crc_eliding_c_comments (const char *buf, unsigned long crc) { const char *p; enum { cOTHER, /* */ cSTRING, /* "... */ cSBACKSLASH, /* "...\ */ cCHAR, /* '... */ cCBACKSLASH, /* '...\ */ cSLASH, /* / */ cSLASH_SLASH, /* //... */ cSLASH_STAR, /* / *... */ cSTAR /* / *...* */ } ss = cOTHER; for (p = buf; ;) { unsigned char c = *p++; switch (c) { case 0: switch (ss) { case cOTHER: return (crc); case cSTRING: case cSBACKSLASH: case cCHAR: case cCBACKSLASH: case cSLASH: case cSLASH_SLASH: case cSLASH_STAR: case cSTAR: fprintf (stderr, "Inopportune EOF: %s\n", buf); exit (1); } break; case '\"': switch (ss) { case cOTHER: ss = cSTRING; break; /* start string */ case cSTRING: ss = cOTHER; break; /* end string */ case cSBACKSLASH: ss = cSTRING; break; case cCHAR: break; case cCBACKSLASH: ss = cCHAR; break; case cSLASH: crc = CRC8 (crc, '/'); ss = cOTHER; break; case cSLASH_SLASH: continue; /* in comment */ case cSLASH_STAR: continue; /* in comment */ case cSTAR: ss = cSLASH_STAR; continue; /* in comment */ } break; case '\\': switch (ss) { case cOTHER: break; case cSTRING: ss = cSBACKSLASH; break; case cSBACKSLASH: ss = cSTRING; break; case cCHAR: ss = cCBACKSLASH; break; case cCBACKSLASH: ss = cCHAR; break; case cSLASH: crc = CRC8 (crc, '/'); ; ss = cOTHER; break; case cSLASH_SLASH: continue; /* in comment */ case cSLASH_STAR: continue; /* in comment */ case cSTAR: ss = cSLASH_STAR; continue; /* in comment */ } break; case '/': switch (ss) { case cOTHER: ss = cSLASH; continue; /* potential comment */ case cSTRING: break; case cSBACKSLASH: ss = cSTRING; break; case cCHAR: break; case cCBACKSLASH: ss = cCHAR; break; case cSLASH: ss = cSLASH_SLASH; continue; /* start comment */ case cSLASH_SLASH: continue; /* in comment */ case cSLASH_STAR: continue; /* in comment */ case cSTAR: ss = cOTHER; continue; /* end of comment */ } break; case '*': switch (ss) { case cOTHER: break; case cSTRING: break; case cSBACKSLASH: ss = cSTRING; break; case cCHAR: break; case cCBACKSLASH: ss = cCHAR; break; case cSLASH: ss = cSLASH_STAR; continue; /* start comment */ case cSLASH_SLASH: continue; /* in comment */ case cSLASH_STAR: ss = cSTAR; continue; /* potential end */ case cSTAR: continue; /* still potential end of comment */ } break; case '\n': case '\r': case ' ': case '\t': case '\014': switch (ss) { case cOTHER: continue; /* ignore all whitespace */ case cSTRING: break; case cSBACKSLASH: ss = cSTRING; break; case cCHAR: break; case cCBACKSLASH: ss = cCHAR; break; case cSLASH: c = '/'; ss = cOTHER; break; case cSLASH_SLASH: if (c == '\n' || c == '\r') ss = cOTHER; /* end comment */ continue; case cSLASH_STAR: continue; /* in comment */ case cSTAR: ss = cSLASH_STAR; continue; /* in comment */ } default: switch (ss) { case cOTHER: break; case cSTRING: break; case cSBACKSLASH: ss = cSTRING; break; case cCHAR: break; case cCBACKSLASH: ss = cCHAR; break; case cSLASH: crc = CRC8 (crc, '/'); ss = cOTHER; break; case cSLASH_SLASH: continue; /* in comment */ case cSLASH_STAR: continue; /* in comment */ case cSTAR: ss = cSLASH_STAR; continue; /* in comment */ } } crc = CRC8 (crc, c); } } /* * main */ int main (int argc, char **argv) { int curarg = 1; char *ofile=0; char *pythonfile=0; char *jsonfile=0; char *show_name=0; while (curarg < argc) { if (!strncmp (argv [curarg], "--verbose", 3)) { fprintf (stderr, "%s version %s\n", argv [0], version); curarg++; continue; } if (!strncmp (argv [curarg], "--yydebug", 3)) { yydebug = 1; curarg++; continue; } if (!strncmp (argv [curarg], "--dump", 3)) { dump_tree = 1; curarg++; continue; } if (!strncmp (argv[curarg], "--show-name", 3)) { curarg++; if (curarg < argc) { show_name = argv[curarg]; curarg++; continue; } else { fprintf(stderr, "Missing filename after --show-name \n"); exit(1); } } if (!strncmp (argv [curarg], "--input", 3)) { curarg++; if (curarg < argc) { input_filename = argv[curarg]; if (!strcmp (argv [curarg], "-")) ifp = stdin; else ifp = fopen (argv [curarg], "r"); if (ifp == NULL) { fprintf (stderr, "Couldn't open input file %s\n", argv[curarg]); exit (1); } curarg++; } else { fprintf(stderr, "Missing filename after --input\n"); exit(1); } continue; } if (!strncmp (argv [curarg], "--output", 3)) { curarg++; if (curarg < argc) { ofp = fopen (argv[curarg], "w"); if (ofp == NULL) { fprintf (stderr, "Couldn't open output file %s\n", argv[curarg]); exit (1); } ofile = argv[curarg]; curarg++; } else { fprintf(stderr, "Missing filename after --output\n"); exit(1); } continue; } if (!strncmp (argv [curarg], "--python", 8)) { curarg++; if (curarg < argc) { if (!strcmp(argv[curarg], "-")) { pythonfp = stdout; } else { pythonfp = fopen(argv[curarg], "w"); pythonfile = argv[curarg]; } if (pythonfp == NULL) { fprintf (stderr, "Couldn't open python output file %s\n", argv[curarg]); exit (1); } curarg++; } else { fprintf(stderr, "Missing filename after --python\n"); exit(1); } continue; } if (!strncmp (argv [curarg], "--json", 6)) { curarg++; if (curarg < argc) { if (!strcmp(argv[curarg], "-")) { jsonfp = stdout; } else { jsonfp = fopen(argv[curarg], "w"); jsonfile = argv[curarg]; } if (jsonfp == NULL) { fprintf (stderr, "Couldn't open JSON output file %s\n", argv[curarg]); exit (1); } curarg++; } else { fprintf(stderr, "Missing filename after --json\n"); exit(1); } continue; } if (!strncmp (argv [curarg], "--app", 4)) { curarg++; if (curarg < argc) { vlib_app_name = argv[curarg]; curarg++; } else { fprintf(stderr, "Missing app name after --app\n"); exit(1); } continue; } usage(argv[0]); exit (1); } if (ofp == NULL) { ofile = 0; } if (pythonfp == NULL) { pythonfile = 0; } if (jsonfp == NULL) { jsonfile = 0; } if (ifp == NULL) { fprintf(stderr, "No input file specified...\n"); exit(1); } if (show_name) { input_filename = show_name; } starttime = time (0); if (yyparse() == 0) { fclose (ifp); curarg -= 2; if (ofile) { printf ("Output written to %s\n", ofile); fclose (ofp); } if (pythonfile) { printf ("Python bindings written to %s\n", pythonfile); fclose (pythonfp); } if (jsonfile) { printf ("JSON bindings written to %s\n", jsonfile); fclose (jsonfp); } } else { fclose (ifp); if (ofp) fclose (ofp); if (ofile) { printf ("Removing %s\n", ofile); unlink (ofile); } if (pythonfile) { printf ("Removing %s\n", pythonfile); unlink (pythonfile); } if (jsonfile) { printf ("Removing %s\n", jsonfile); unlink (jsonfile); } exit (1); } exit (0); } /* * usage */ static void usage (char *progname) { fprintf (stderr, "usage: %s --input [--output ] " "[--json ] [--python ]\n%s", progname, " [--yydebug] [--dump-tree]\n"); exit (1); } /* * yyerror */ void yyerror (char *s) { fprintf (stderr, "%s:%d %s\n", current_filename, the_lexer_linenumber, s); } static char namebuf [MAXNAME]; static inline char getc_char (FILE *ifp) { return ((char)(getc(ifp) & 0x7f)); } /* * yylex (well, yylex_1: The real yylex below does crc-hackery) */ static int yylex_1 (void) { int nameidx=0; char c; enum { LP_INITIAL_WHITESPACE, LP_LINE_NUMBER, LP_PRE_FILENAME_WHITESPACE, LP_FILENAME, LP_POST_FILENAME, LP_OTHER } lp_substate = LP_INITIAL_WHITESPACE; again: switch (the_lexer_state) { /* * START state -- looking for something interesting */ case START_STATE: c = getc_char (ifp); if (feof (ifp)) return (EOF); switch (c) { case '\n': the_lexer_linenumber++; goto again; case '#': the_lexer_state = LINE_PRAGMA_STATE; lp_substate = LP_INITIAL_WHITESPACE; goto again; /* FALLTHROUGH */ case '\t': case ' ': goto again; case '(': return (LPAR); case ')': return (RPAR); case ';': return (SEMI); case '[': return (LBRACK); case ']': return (RBRACK); case '{': return (LCURLY); case '}': return (RCURLY); case ',': return (COMMA); case '"': nameidx = 0; the_lexer_state = STRING_STATE; goto again; case '@': nameidx = 0; the_lexer_state = HELPER_STATE; goto again; case '/': c = getc_char (ifp); if (feof (ifp)) return (EOF); if (c == '/') { the_lexer_state = CPP_COMMENT_STATE; goto again; } else if (c == '*') { the_lexer_state = C_COMMENT_STATE; goto again; } else { fprintf (stderr, "unknown token /%c at line %d\n", c, the_lexer_linenumber); return (BARF); } case '\\': c = getc_char (ifp); if (feof (ifp)) return (EOF); /* Note fallthrough... */ default: if (isalpha (c) || c == '_') { namebuf [0] = c; nameidx = 1; the_lexer_state = NAME_STATE; goto again; } else if (isdigit(c)) { namebuf [0] = c; nameidx = 1; the_lexer_state = NUMBER_STATE; goto again; } fprintf (stderr, "unknown token %c at line %d\n", c, the_lexer_linenumber); return (BARF); } /* * NAME state -- eat the rest of a name */ case NAME_STATE: c = getc_char (ifp); if (feof (ifp)) return (EOF); if (!isalnum (c) && c != '_') { ungetc (c, ifp); namebuf [nameidx] = 0; the_lexer_state = START_STATE; return (name_check (namebuf, &yylval)); } if (nameidx >= (MAXNAME-1)) { fprintf(stderr, "lex input buffer overflow...\n"); exit(1); } namebuf [nameidx++] = c; goto again; /* * NUMBER state -- eat the rest of a number */ case NUMBER_STATE: c = getc_char (ifp); if (feof (ifp)) return (EOF); if (!isdigit (c)) { ungetc (c, ifp); namebuf [nameidx] = 0; the_lexer_state = START_STATE; yylval = (void *) atol(namebuf); return (NUMBER); } if (nameidx >= (MAXNAME-1)) { fprintf(stderr, "lex input buffer overflow...\n"); exit(1); } namebuf [nameidx++] = c; goto again; /* * C_COMMENT state -- eat a peach */ case C_COMMENT_STATE: c = getc_char (ifp); if (feof (ifp)) return (EOF); if (c == '*') { c = getc_char (ifp); if (feof (ifp)) return (EOF); if (c == '/') { the_lexer_state = START_STATE; goto again; } } if (c == '\n') the_lexer_linenumber++; goto again; /* * CPP_COMMENT state -- eat a plum */ case CPP_COMMENT_STATE: c = getc_char (ifp); if (feof (ifp)) return (EOF); if (c == '\n') { the_lexer_linenumber++; the_lexer_state = START_STATE; goto again; } goto again; case STRING_STATE: c = getc_char (ifp); if (feof (ifp)) return (EOF); switch (c) { case '\\': c = getc_char (ifp); if (feof (ifp)) return (EOF); namebuf[nameidx++] = c; goto again; case '"': namebuf[nameidx] = 0; yylval = (YYSTYPE) sxerox (namebuf); the_lexer_state = START_STATE; return (STRING); default: if (c == '\n') the_lexer_linenumber++; if (nameidx >= (MAXNAME-1)) { fprintf(stderr, "lex input buffer overflow...\n"); exit(1); } namebuf[nameidx++] = c; goto again; } break; case HELPER_STATE: c = getc_char (ifp); if (feof (ifp)) return (EOF); switch (c) { case '\\': c = getc_char (ifp); if (feof (ifp)) return (EOF); namebuf[nameidx] = c; goto again; case '@': namebuf[nameidx] = 0; yylval = (YYSTYPE) sxerox (namebuf); the_lexer_state = START_STATE; return (HELPER_STRING); default: if (c == '\n') the_lexer_linenumber++; /* * CPP makes it approximately impossible to * type "#define FOO 123", so we provide a * lexical trick to achieve that result */ if (c == '$') c = '#'; if (nameidx >= (MAXNAME-1)) { fprintf(stderr, "lex input buffer overflow...\n"); exit(1); } namebuf[nameidx++] = c; goto again; } break; case LINE_PRAGMA_STATE: /* We're only interested in lines of the form # 259 "foo.c" 17 */ switch (lp_substate) { case LP_INITIAL_WHITESPACE: /* no number seen yet */ c = getc_char(ifp); if (feof(ifp)) return(EOF); if (c >= '0' && c <= '9') { namebuf[nameidx++] = c; lp_substate = LP_LINE_NUMBER; } else if (c == '\n') { goto lp_end_of_line; } else if (c != ' ' && c != '\t') { /* Nothing */ } else { lp_substate = LP_OTHER; } goto again; case LP_LINE_NUMBER: /* eating linenumber */ c = getc_char(ifp); if (feof(ifp)) return(EOF); if (c >= '0' && c <= '9') { namebuf[nameidx++] = c; } else if (c == ' ' || c == '\t') { namebuf[nameidx++] = 0; the_lexer_linenumber = atol(namebuf); lp_substate = LP_PRE_FILENAME_WHITESPACE; } else if (c == '\n') { goto lp_end_of_line; } else { lp_substate = LP_OTHER; } goto again; case LP_PRE_FILENAME_WHITESPACE: /* awaiting filename */ c = getc_char(ifp); if (feof(ifp)) return(EOF); if (c == '"') { lp_substate = LP_FILENAME; nameidx = 0; } else if (c == ' ' || c == '\t') { /* nothing */ } else if (c == '\n') { goto lp_end_of_line; } else { lp_substate = LP_OTHER; } goto again; case LP_FILENAME: /* eating filename */ c = getc_char(ifp); if (feof(ifp)) return(EOF); if (c == '"') { lp_substate = LP_POST_FILENAME; namebuf[nameidx] = 0; } else if (c == '\n') { goto lp_end_of_line; /* syntax error... */ } else { namebuf[nameidx++] = c; } goto again; case LP_POST_FILENAME: /* ignoring rest of line */ case LP_OTHER: c = getc_char(ifp); if (feof(ifp)) return(EOF); if (c == '\n') { if (lp_substate == LP_POST_FILENAME) { if (current_filename_allocated) { current_filename_allocated = 0; free(current_filename); } if (!strcmp(namebuf, "")) { current_filename = input_filename; } else { current_filename = sxerox(namebuf); current_filename_allocated = 1; } } lp_end_of_line: the_lexer_state = START_STATE; nameidx = 0; } goto again; } break; } fprintf (stderr, "LEXER BUG!\n"); exit (1); /* NOTREACHED */ return (0); } /* * Parse a token and side-effect input_crc * in a whitespace- and comment-insensitive fashion. */ int yylex (void) { /* * Accumulate a crc32-based signature while processing the * input file. The goal is to come up with a magic number * which changes precisely when the original input file changes * but which ignores whitespace changes. */ unsigned long crc = input_crc; int node_type = yylex_1 (); unsigned long crc2 = message_crc; int use_helper_string = 0; unsigned short code; switch (node_type) { case PRIMTYPE: case NAME: case NUMBER: case STRING: case HELPER_STRING: use_helper_string = 1; break; /* Other node types have no "substate" */ /* This code is written in this curious fashion because we * want the generated CRC to be independent of the particular * values a particular version of lex/bison assigned to various states. */ case RPAR: code = 258; break; case LPAR: code = 259; break; case SEMI: code = 260; break; case LBRACK: code = 261; break; case RBRACK: code = 262; break; case BARF: code = 265; break; case TPACKED: code = 266; break; case DEFINE: code = 267; break; case LCURLY: code = 268; break; case RCURLY: code = 269; break; case UNION: code = 271; break; case COMMA: code = 273; break; case NOVERSION: code = 274; break; case MANUAL_PRINT: code = 275; break; case MANUAL_ENDIAN: code = 276; break; case TYPEONLY: code = 278; break; case DONT_TRACE: code = 279; break; case EOF: code = ~0; break; /* hysterical compatibility */ default: fprintf(stderr, "yylex: node_type %d missing state CRC cookie\n", node_type); exit(1); } if (use_helper_string) { /* We know these types accumulated token text into namebuf */ /* HELPER_STRING may still contain C comments. Argh. */ crc = crc_eliding_c_comments (namebuf, crc); crc2 = crc_eliding_c_comments (namebuf, crc2); } else { crc = CRC16 (crc, code); crc2 = CRC16 (crc2, code); } input_crc = crc; message_crc = crc2; return (node_type); } /* * name_check -- see if the name we just ate * matches a known keyword. If so, set yylval * to a new instance of , and return PARSER_MACRO * * Otherwise, set yylval to sxerox (s) and return NAME */ static struct keytab { char *name; enum node_subclass subclass_id; } keytab [] = /* Keep the table sorted, binary search used below! */ { {"define", NODE_DEFINE}, {"dont_trace", NODE_DONT_TRACE}, {"f64", NODE_F64}, {"i16", NODE_I16}, {"i32", NODE_I32}, {"i64", NODE_I64}, {"i8", NODE_I8}, {"manual_endian", NODE_MANUAL_ENDIAN}, {"manual_print", NODE_MANUAL_PRINT}, {"noversion", NODE_NOVERSION}, {"packed", NODE_PACKED}, {"typeonly", NODE_TYPEONLY}, {"u16", NODE_U16}, {"u32", NODE_U32}, {"u64", NODE_U64}, {"u8", NODE_U8}, {"union", NODE_UNION}, {"uword", NODE_UWORD}, }; static int name_check (const char *s, YYSTYPE *token_value) { enum node_subclass subclass_id; int top, bot, mid; int result; for (top = 0, bot = (sizeof(keytab) / sizeof(struct keytab))-1; bot >= top; ) { mid = (top + bot) / 2; result = name_compare (s, keytab[mid].name); if (result < 0) bot = mid - 1; else if (result > 0) top = mid + 1; else { subclass_id = keytab[mid].subclass_id; switch (subclass_id) { case NODE_U8: case NODE_U16: case NODE_U32: case NODE_U64: case NODE_I8: case NODE_I16: case NODE_I32: case NODE_I64: case NODE_F64: case NODE_UWORD: *token_value = make_node(subclass_id); return (PRIMTYPE); case NODE_PACKED: *token_value = make_node(subclass_id); return (TPACKED); case NODE_DEFINE: message_crc = 0; *token_value = make_node(subclass_id); return(DEFINE); case NODE_MANUAL_PRINT: *token_value = (YYSTYPE) NODE_FLAG_MANUAL_PRINT; return (MANUAL_PRINT); case NODE_MANUAL_ENDIAN: *token_value = (YYSTYPE) NODE_FLAG_MANUAL_ENDIAN; return (MANUAL_ENDIAN); case NODE_TYPEONLY: *token_value = (YYSTYPE) NODE_FLAG_TYPEONLY; return(TYPEONLY); case NODE_DONT_TRACE: *token_value = (YYSTYPE) NODE_FLAG_DONT_TRACE; return(DONT_TRACE); case NODE_NOVERSION: return(NOVERSION); case NODE_UNION: return(UNION); default: fprintf (stderr, "fatal: keytab botch!\n"); exit (1); } } } *token_value = (YYSTYPE) sxerox (s); return (NAME); } /* * sxerox */ char *sxerox (const char *s) { int len = strlen (s); char *rv; rv = (char *) malloc (len+1); if (rv == 0) { fprintf(stderr, "Out of memory..."); exit (1); } strcpy (rv, s); return (rv); } /* * name_compare */ int name_compare (const char *s1, const char *s2) { char c1, c2; while (*s1 && *s2) { c1 = *s1++; c2 = *s2++; c1 = tolower (c1); c2 = tolower (c2); if (c1 < c2) return (-1); else if (c1 > c2) return (1); } if (*s1 < *s2) return (-1); else if (*s1 > *s2) return (1); return (0); }