/*
*------------------------------------------------------------------
* 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);
}
