diff options
Diffstat (limited to 'vppapigen/lex.c')
| -rw-r--r-- | vppapigen/lex.c | 1064 |
1 files changed, 1064 insertions, 0 deletions
diff --git a/vppapigen/lex.c b/vppapigen/lex.c new file mode 100644 index 00000000000..b9dc833ad23 --- /dev/null +++ b/vppapigen/lex.c @@ -0,0 +1,1064 @@ +/* + *------------------------------------------------------------------ + * 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 <stdio.h> +#include <ctype.h> +#include <time.h> +#include <string.h> +#include <unistd.h> +#include <stdlib.h> + +#include "lex.h" +#include "node.h" +#include "gram.h" + +FILE *ifp, *ofp, *javafp, *jnifp; +char *java_class = "vppApi"; +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; +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; + +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 *jofile=0; + char *jnifile=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], "--java", 4)) { + curarg++; + if (curarg < argc) { + javafp = fopen (argv[curarg], "w"); + if (javafp == NULL) { + fprintf (stderr, "Couldn't open java output file %s\n", + argv[curarg]); + exit (1); + } + jofile = argv[curarg]; + curarg++; + } else { + fprintf(stderr, "Missing filename after --java\n"); + exit(1); + } + continue; + } + if (!strncmp (argv [curarg], "--jni", 4)) { + curarg++; + if (curarg < argc) { + jnifp = fopen (argv[curarg], "w"); + if (jnifp == NULL) { + fprintf (stderr, "Couldn't open jni output file %s\n", + argv[curarg]); + exit (1); + } + jnifile = argv[curarg]; + curarg++; + } else { + fprintf(stderr, "Missing filename after --jni\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; + } + if (!strncmp (argv [curarg], "--class", 3)) { + curarg++; + if (curarg < argc) { + java_class = argv[curarg]; + curarg++; + } else { + fprintf(stderr, "Missing class name after --class\n"); + exit(1); + } + continue; + } + + usage(argv[0]); + exit (1); + } + if (ofp == NULL) { + ofile = 0; + } + if (javafp == NULL) { + jofile = 0; + } + if (jnifp == NULL) { + jnifile = 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 (jofile) { + printf ("Java class defn written to %s\n", jofile); + fclose (javafp); + } + if (jnifile) { + printf ("Java native bindings written to %s\n", jnifile); + fclose (jnifp); + } + } + else { + fclose (ifp); + fclose (ofp); + if (ofile) { + printf ("Removing %s\n", ofile); + unlink (ofile); + } + fclose (javafp); + if (jofile) { + printf ("Removing %s\n", jofile); + unlink (jofile); + } + if (jnifile) { + printf ("Removing %s\n", jnifile); + unlink (jnifile); + } + exit (1); + } + exit (0); +} + +/* + * usage + */ +static void usage (char *progname) +{ + fprintf (stderr, + "usage: %s --input <filename> [--output <filename>]\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]; + +/* + * yylex (well, yylex_1: The real yylex below does crc-hackery) + */ +static int yylex_1 (void) +{ + int nameidx=0; + char c; + int at_bol=1; + 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 (ifp); + if (feof (ifp)) + return (EOF); + + switch (c) { + case '\n': + the_lexer_linenumber++; + at_bol=1; + goto again; + + case '#': + if (!at_bol) { + fprintf (stderr, "unknown token /%c at line %d\n", + c, the_lexer_linenumber); + return (BARF); + } + + 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 (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 (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 (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 (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 (ifp); + if (feof (ifp)) + return (EOF); + if (c == '*') { + c = getc (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 (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 (ifp); + if (feof (ifp)) + return (EOF); + switch (c) { + case '\\': + c = getc (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 (ifp); + if (feof (ifp)) + return (EOF); + switch (c) { + case '\\': + c = getc (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(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(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(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(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(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, "<stdin>")) { + current_filename = input_filename; + } else { + current_filename = sxerox(namebuf); + current_filename_allocated = 1; + } + } + lp_end_of_line: + the_lexer_state = START_STATE; + at_bol = 1; + 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 (); + + switch (node_type) { + case PRIMTYPE: + case NAME: + case NUMBER: + case STRING: + case 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); + 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 NAME: crc = CRC16 (crc, 257); break; */ + case RPAR: crc = CRC16 (crc, 258); break; + case LPAR: crc = CRC16 (crc, 259); break; + case SEMI: crc = CRC16 (crc, 260); break; + case LBRACK: crc = CRC16 (crc, 261); break; + case RBRACK: crc = CRC16 (crc, 262); break; + /* case NUMBER: crc = CRC16 (crc, 263); break; */ + /* case PRIMTYPE: crc = CRC16 (crc, 264); break; */ + case BARF: crc = CRC16 (crc, 265); break; + case TPACKED: crc = CRC16 (crc, 266); break; + case DEFINE: crc = CRC16 (crc, 267); break; + case LCURLY: crc = CRC16 (crc, 268); break; + case RCURLY: crc = CRC16 (crc, 269); break; + /* case STRING: crc = CRC16 (crc, 270); break; */ + case UNION: crc = CRC16 (crc, 271); break; + /* case HELPER_STRING: crc = CRC16 (crc, 272); break; */ + case COMMA: crc = CRC16 (crc, 273); break; + case NOVERSION: crc = CRC16 (crc, 274); break; + case MANUAL_PRINT: crc = CRC16 (crc, 275); break; + case MANUAL_ENDIAN: crc = CRC16 (crc, 276); break; + case MANUAL_JAVA: crc = CRC16 (crc, 277); break; + case TYPEONLY: crc = CRC16 (crc, 278); break; + case DONT_TRACE: crc = CRC16 (crc, 279); break; + + case EOF: crc = CRC16 (crc, ~0); break; /* hysterical compatibility */ + + default: + fprintf(stderr, "yylex: node_type %d missing state CRC cookie\n", + node_type); + exit(1); + } + + input_crc = crc; + 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 <subclass of node>, 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_java", NODE_MANUAL_JAVA}, + {"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: + *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_MANUAL_JAVA: + *token_value = (YYSTYPE) NODE_FLAG_MANUAL_JAVA; + return (MANUAL_JAVA); + + 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); + 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); +} |