--- /dev/null
+/*
+ *------------------------------------------------------------------
+ * 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 "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 <filename> [--output <filename>] "
+ "[--json <filename>] [--python <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];
+
+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, "<stdin>")) {
+ 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 <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_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);
+}
Code Review / vpp.git / blobdiff