/usr.bin/xlint/lint1/scan.l
https://bitbucket.org/freebsd/freebsd-head/ · LEX · 1475 lines · 1049 code · 139 blank · 287 comment · 0 complexity · 96a6366d9419c4b2ccf27bc789942a0e MD5 · raw file
- %{
- /* $NetBSD: scan.l,v 1.26 2002/01/31 22:30:21 tv Exp $ */
- /*
- * Copyright (c) 1996 Christopher G. Demetriou. All Rights Reserved.
- * Copyright (c) 1994, 1995 Jochen Pohl
- * All Rights Reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by Jochen Pohl for
- * The NetBSD Project.
- * 4. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
- #include <sys/cdefs.h>
- #if defined(__RCSID) && !defined(lint)
- __RCSID("$NetBSD: scan.l,v 1.26 2002/01/31 22:30:21 tv Exp $");
- #endif
- __FBSDID("$FreeBSD$");
- #include <stdlib.h>
- #include <string.h>
- #include <limits.h>
- #include <float.h>
- #include <ctype.h>
- #include <errno.h>
- #include <err.h>
- #include <math.h>
- #include "lint1.h"
- #include "cgram.h"
- #define CHAR_MASK (~(~0 << CHAR_BIT))
- #define YY_NO_UNPUT
- /* Current position (its also updated when an included file is parsed) */
- pos_t curr_pos = { 1, "", 0 };
- /*
- * Current position in C source (not updated when an included file is
- * parsed).
- */
- pos_t csrc_pos = { 1, "", 0 };
- static void incline(void);
- static void badchar(int);
- static sbuf_t *allocsb(void);
- static void freesb(sbuf_t *);
- static int inpc(void);
- static int hash(const char *);
- static sym_t *search(sbuf_t *);
- static int name(void);
- static int keyw(sym_t *);
- static int icon(int);
- static int fcon(void);
- static int operator(int, op_t);
- static int ccon(void);
- static int wccon(void);
- static int getescc(int);
- static void directive(void);
- static void comment(void);
- static void slashslashcomment(void);
- static int string(void);
- static int wcstrg(void);
- %}
- L [_A-Za-z]
- D [0-9]
- NZD [1-9]
- OD [0-7]
- HD [0-9A-Fa-f]
- EX ([eE][+-]?[0-9]+)
- %%
- {L}({L}|{D})* return (name());
- 0{OD}*[lLuU]* return (icon(8));
- {NZD}{D}*[lLuU]* return (icon(10));
- 0[xX]{HD}+[lLuU]* return (icon(16));
- {D}+\.{D}*{EX}?[fFlL]? |
- {D}+{EX}[fFlL]? |
- \.{D}+{EX}?[fFlL]? return (fcon());
- "=" return (operator(T_ASSIGN, ASSIGN));
- "*=" return (operator(T_OPASS, MULASS));
- "/=" return (operator(T_OPASS, DIVASS));
- "%=" return (operator(T_OPASS, MODASS));
- "+=" return (operator(T_OPASS, ADDASS));
- "-=" return (operator(T_OPASS, SUBASS));
- "<<=" return (operator(T_OPASS, SHLASS));
- ">>=" return (operator(T_OPASS, SHRASS));
- "&=" return (operator(T_OPASS, ANDASS));
- "^=" return (operator(T_OPASS, XORASS));
- "|=" return (operator(T_OPASS, ORASS));
- "||" return (operator(T_LOGOR, LOGOR));
- "&&" return (operator(T_LOGAND, LOGAND));
- "|" return (operator(T_OR, OR));
- "&" return (operator(T_AND, AND));
- "^" return (operator(T_XOR, XOR));
- "==" return (operator(T_EQOP, EQ));
- "!=" return (operator(T_EQOP, NE));
- "<" return (operator(T_RELOP, LT));
- ">" return (operator(T_RELOP, GT));
- "<=" return (operator(T_RELOP, LE));
- ">=" return (operator(T_RELOP, GE));
- "<<" return (operator(T_SHFTOP, SHL));
- ">>" return (operator(T_SHFTOP, SHR));
- "++" return (operator(T_INCDEC, INC));
- "--" return (operator(T_INCDEC, DEC));
- "->" return (operator(T_STROP, ARROW));
- "." return (operator(T_STROP, POINT));
- "+" return (operator(T_ADDOP, PLUS));
- "-" return (operator(T_ADDOP, MINUS));
- "*" return (operator(T_MULT, MULT));
- "/" return (operator(T_DIVOP, DIV));
- "%" return (operator(T_DIVOP, MOD));
- "!" return (operator(T_UNOP, NOT));
- "~" return (operator(T_UNOP, COMPL));
- "\"" return (string());
- "L\"" return (wcstrg());
- ";" return (T_SEMI);
- "{" return (T_LBRACE);
- "}" return (T_RBRACE);
- "," return (T_COMMA);
- ":" return (T_COLON);
- "?" return (T_QUEST);
- "[" return (T_LBRACK);
- "]" return (T_RBRACK);
- "(" return (T_LPARN);
- ")" return (T_RPARN);
- "..." return (T_ELLIPSE);
- "'" return (ccon());
- "L'" return (wccon());
- ^#.*$ directive();
- \n incline();
- \t|" "|\f|\v ;
- "/*" comment();
- "//" slashslashcomment();
- . badchar(yytext[0]);
- %%
- static void
- incline(void)
- {
- curr_pos.p_line++;
- curr_pos.p_uniq = 0;
- if (curr_pos.p_file == csrc_pos.p_file) {
- csrc_pos.p_line++;
- csrc_pos.p_uniq = 0;
- }
- }
- static void
- badchar(int c)
- {
- /* unknown character \%o */
- error(250, c);
- }
- /*
- * Keywords.
- * During initialisation they are written to the symbol table.
- */
- static struct kwtab {
- const char *kw_name; /* keyword */
- int kw_token; /* token returned by yylex() */
- scl_t kw_scl; /* storage class if kw_token T_SCLASS */
- tspec_t kw_tspec; /* type spec. if kw_token T_TYPE or T_SOU */
- tqual_t kw_tqual; /* type qual. fi kw_token T_QUAL */
- u_int kw_stdc : 1; /* STDC keyword */
- u_int kw_gcc : 1; /* GCC keyword */
- } kwtab[] = {
- { "asm", T_ASM, 0, 0, 0, 0, 1 },
- { "__asm", T_ASM, 0, 0, 0, 0, 0 },
- { "__asm__", T_ASM, 0, 0, 0, 0, 0 },
- { "auto", T_SCLASS, AUTO, 0, 0, 0, 0 },
- { "break", T_BREAK, 0, 0, 0, 0, 0 },
- { "case", T_CASE, 0, 0, 0, 0, 0 },
- { "char", T_TYPE, 0, CHAR, 0, 0, 0 },
- { "const", T_QUAL, 0, 0, CONST, 1, 0 },
- { "__const__", T_QUAL, 0, 0, CONST, 0, 0 },
- { "__const", T_QUAL, 0, 0, CONST, 0, 0 },
- { "continue", T_CONTINUE, 0, 0, 0, 0, 0 },
- { "default", T_DEFAULT, 0, 0, 0, 0, 0 },
- { "do", T_DO, 0, 0, 0, 0, 0 },
- { "double", T_TYPE, 0, DOUBLE, 0, 0, 0 },
- { "else", T_ELSE, 0, 0, 0, 0, 0 },
- { "enum", T_ENUM, 0, 0, 0, 0, 0 },
- { "extern", T_SCLASS, EXTERN, 0, 0, 0, 0 },
- { "float", T_TYPE, 0, FLOAT, 0, 0, 0 },
- { "for", T_FOR, 0, 0, 0, 0, 0 },
- { "goto", T_GOTO, 0, 0, 0, 0, 0 },
- { "if", T_IF, 0, 0, 0, 0, 0 },
- { "inline", T_SCLASS, INLINE, 0, 0, 0, 1 },
- { "__inline__", T_SCLASS, INLINE, 0, 0, 0, 0 },
- { "__inline", T_SCLASS, INLINE, 0, 0, 0, 0 },
- { "int", T_TYPE, 0, INT, 0, 0, 0 },
- { "__symbolrename", T_SYMBOLRENAME, 0, 0, 0, 0, 0 },
- { "long", T_TYPE, 0, LONG, 0, 0, 0 },
- { "register", T_SCLASS, REG, 0, 0, 0, 0 },
- { "return", T_RETURN, 0, 0, 0, 0, 0 },
- { "short", T_TYPE, 0, SHORT, 0, 0, 0 },
- { "signed", T_TYPE, 0, SIGNED, 0, 1, 0 },
- { "__signed__", T_TYPE, 0, SIGNED, 0, 0, 0 },
- { "__signed", T_TYPE, 0, SIGNED, 0, 0, 0 },
- { "sizeof", T_SIZEOF, 0, 0, 0, 0, 0 },
- { "static", T_SCLASS, STATIC, 0, 0, 0, 0 },
- { "struct", T_SOU, 0, STRUCT, 0, 0, 0 },
- { "switch", T_SWITCH, 0, 0, 0, 0, 0 },
- { "typedef", T_SCLASS, TYPEDEF, 0, 0, 0, 0 },
- { "union", T_SOU, 0, UNION, 0, 0, 0 },
- { "unsigned", T_TYPE, 0, UNSIGN, 0, 0, 0 },
- { "void", T_TYPE, 0, VOID, 0, 0, 0 },
- { "volatile", T_QUAL, 0, 0, VOLATILE, 1, 0 },
- { "__volatile__", T_QUAL, 0, 0, VOLATILE, 0, 0 },
- { "__volatile", T_QUAL, 0, 0, VOLATILE, 0, 0 },
- { "while", T_WHILE, 0, 0, 0, 0, 0 },
- { NULL, 0, 0, 0, 0, 0, 0 }
- };
- /* Symbol table */
- static sym_t *symtab[HSHSIZ1];
- /* bit i of the entry with index i is set */
- uint64_t qbmasks[sizeof(uint64_t) * CHAR_BIT];
- /* least significant i bits are set in the entry with index i */
- uint64_t qlmasks[sizeof(uint64_t) * CHAR_BIT + 1];
- /* least significant i bits are not set in the entry with index i */
- uint64_t qumasks[sizeof(uint64_t) * CHAR_BIT + 1];
- /* free list for sbuf structures */
- static sbuf_t *sbfrlst;
- /* Typ of next expected symbol */
- symt_t symtyp;
- /*
- * All keywords are written to the symbol table. This saves us looking
- * in an extra table for each name we found.
- */
- void
- initscan(void)
- {
- struct kwtab *kw;
- sym_t *sym;
- int h, i;
- uint64_t uq;
- for (kw = kwtab; kw->kw_name != NULL; kw++) {
- if (kw->kw_stdc && tflag)
- continue;
- if (kw->kw_gcc && !gflag)
- continue;
- sym = getblk(sizeof (sym_t));
- sym->s_name = kw->kw_name;
- sym->s_keyw = 1;
- sym->s_value.v_quad = kw->kw_token;
- if (kw->kw_token == T_TYPE || kw->kw_token == T_SOU) {
- sym->s_tspec = kw->kw_tspec;
- } else if (kw->kw_token == T_SCLASS) {
- sym->s_scl = kw->kw_scl;
- } else if (kw->kw_token == T_QUAL) {
- sym->s_tqual = kw->kw_tqual;
- }
- h = hash(sym->s_name);
- if ((sym->s_link = symtab[h]) != NULL)
- symtab[h]->s_rlink = &sym->s_link;
- (symtab[h] = sym)->s_rlink = &symtab[h];
- }
- /* initialize bit-masks for quads */
- for (i = 0; i < sizeof (uint64_t) * CHAR_BIT; i++) {
- qbmasks[i] = (uint64_t)1 << i;
- uq = ~(uint64_t)0 << i;
- qumasks[i] = uq;
- qlmasks[i] = ~uq;
- }
- qumasks[i] = 0;
- qlmasks[i] = ~(uint64_t)0;
- }
- /*
- * Get a free sbuf structure, if possible from the free list
- */
- static sbuf_t *
- allocsb(void)
- {
- sbuf_t *sb;
- if ((sb = sbfrlst) != NULL) {
- sbfrlst = sb->sb_nxt;
- } else {
- if ((sb = malloc(sizeof (sbuf_t))) == NULL)
- nomem();
- }
- (void)memset(sb, 0, sizeof (*sb));
- return (sb);
- }
- /*
- * Put a sbuf structure to the free list
- */
- static void
- freesb(sbuf_t *sb)
- {
- sb->sb_nxt = sbfrlst;
- sbfrlst = sb;
- }
- /*
- * Read a character and ensure that it is positive (except EOF).
- * Increment line count(s) if necessary.
- */
- static int
- inpc(void)
- {
- int c;
- if ((c = input()) != EOF && (c &= CHAR_MASK) == '\n')
- incline();
- return (c);
- }
- static int
- hash(const char *s)
- {
- u_int v;
- const u_char *us;
- v = 0;
- for (us = (const u_char *)s; *us != '\0'; us++) {
- v = (v << sizeof (v)) + *us;
- v ^= v >> (sizeof (v) * CHAR_BIT - sizeof (v));
- }
- return (v % HSHSIZ1);
- }
- /*
- * Lex has found a letter followed by zero or more letters or digits.
- * It looks for a symbol in the symbol table with the same name. This
- * symbol must either be a keyword or a symbol of the type required by
- * symtyp (label, member, tag, ...).
- *
- * If it is a keyword, the token is returned. In some cases it is described
- * more deeply by data written to yylval.
- *
- * If it is a symbol, T_NAME is returned and the pointer to a sbuf struct
- * is stored in yylval. This struct contains the name of the symbol, it's
- * length and hash value. If there is already a symbol of the same name
- * and type in the symbol table, the sbuf struct also contains a pointer
- * to the symbol table entry.
- */
- static int
- name(void)
- {
- char *s;
- sbuf_t *sb;
- sym_t *sym;
- int tok;
- sb = allocsb();
- sb->sb_name = yytext;
- sb->sb_len = yyleng;
- sb->sb_hash = hash(yytext);
- if ((sym = search(sb)) != NULL && sym->s_keyw) {
- freesb(sb);
- return (keyw(sym));
- }
- sb->sb_sym = sym;
- if (sym != NULL) {
- if (blklev < sym->s_blklev)
- lerror("name() 1");
- sb->sb_name = sym->s_name;
- sb->sb_len = strlen(sym->s_name);
- tok = sym->s_scl == TYPEDEF ? T_TYPENAME : T_NAME;
- } else {
- s = getblk(yyleng + 1);
- (void)memcpy(s, yytext, yyleng + 1);
- sb->sb_name = s;
- sb->sb_len = yyleng;
- tok = T_NAME;
- }
- yylval.y_sb = sb;
- return (tok);
- }
- static sym_t *
- search(sbuf_t *sb)
- {
- sym_t *sym;
- for (sym = symtab[sb->sb_hash]; sym != NULL; sym = sym->s_link) {
- if (strcmp(sym->s_name, sb->sb_name) == 0) {
- if (sym->s_keyw || sym->s_kind == symtyp)
- return (sym);
- }
- }
- return (NULL);
- }
- static int
- keyw(sym_t *sym)
- {
- int t;
- if ((t = (int)sym->s_value.v_quad) == T_SCLASS) {
- yylval.y_scl = sym->s_scl;
- } else if (t == T_TYPE || t == T_SOU) {
- yylval.y_tspec = sym->s_tspec;
- } else if (t == T_QUAL) {
- yylval.y_tqual = sym->s_tqual;
- }
- return (t);
- }
- /*
- * Convert a string representing an integer into internal representation.
- * The value is returned in yylval. icon() (and yylex()) returns T_CON.
- */
- static int
- icon(int base)
- {
- int l_suffix, u_suffix;
- int len;
- const char *cp;
- char c, *eptr;
- tspec_t typ;
- u_long ul = 0;
- uint64_t uq = 0;
- int ansiu;
- static tspec_t contypes[2][3] = {
- { INT, LONG, QUAD },
- { UINT, ULONG, UQUAD }
- };
- cp = yytext;
- len = yyleng;
- /* skip 0x */
- if (base == 16) {
- cp += 2;
- len -= 2;
- }
- /* read suffixes */
- l_suffix = u_suffix = 0;
- for ( ; ; ) {
- if ((c = cp[len - 1]) == 'l' || c == 'L') {
- l_suffix++;
- } else if (c == 'u' || c == 'U') {
- u_suffix++;
- } else {
- break;
- }
- len--;
- }
- if (l_suffix > 2 || u_suffix > 1) {
- /* malformed integer constant */
- warning(251);
- if (l_suffix > 2)
- l_suffix = 2;
- if (u_suffix > 1)
- u_suffix = 1;
- }
- if (tflag && u_suffix != 0) {
- /* suffix U is illegal in traditional C */
- warning(97);
- }
- typ = contypes[u_suffix][l_suffix];
- errno = 0;
- if (l_suffix < 2) {
- ul = strtoul(cp, &eptr, base);
- } else {
- uq = strtouq(cp, &eptr, base);
- }
- if (eptr != cp + len)
- lerror("icon() 1");
- if (errno != 0)
- /* integer constant out of range */
- warning(252);
- /*
- * If the value is to big for the current type, we must choose
- * another type.
- */
- ansiu = 0;
- switch (typ) {
- case INT:
- if (ul <= INT_MAX) {
- /* ok */
- } else if (ul <= (unsigned)UINT_MAX && base != 10) {
- typ = UINT;
- } else if (ul <= LONG_MAX) {
- typ = LONG;
- } else {
- typ = ULONG;
- }
- if (typ == UINT || typ == ULONG) {
- if (tflag) {
- typ = LONG;
- } else if (!sflag) {
- /*
- * Remember that the constant is unsigned
- * only in ANSI C
- */
- ansiu = 1;
- }
- }
- break;
- case UINT:
- if (ul > (u_int)UINT_MAX)
- typ = ULONG;
- break;
- case LONG:
- if (ul > LONG_MAX && !tflag) {
- typ = ULONG;
- if (!sflag)
- ansiu = 1;
- }
- break;
- case QUAD:
- if (uq > QUAD_MAX && !tflag) {
- typ = UQUAD;
- if (!sflag)
- ansiu = 1;
- }
- break;
- /* LINTED (enumeration values not handled in switch) */
- case STRUCT:
- case VOID:
- case LDOUBLE:
- case FUNC:
- case ARRAY:
- case PTR:
- case ENUM:
- case UNION:
- case SIGNED:
- case NOTSPEC:
- case DOUBLE:
- case FLOAT:
- case UQUAD:
- case ULONG:
- case USHORT:
- case SHORT:
- case UCHAR:
- case SCHAR:
- case CHAR:
- case UNSIGN:
- break;
- }
- if (typ != QUAD && typ != UQUAD) {
- if (isutyp(typ)) {
- uq = ul;
- } else {
- uq = (int64_t)(long)ul;
- }
- }
- uq = (uint64_t)xsign((int64_t)uq, typ, -1);
- if ((yylval.y_val = calloc(1, sizeof(val_t))) == NULL)
- nomem();
- yylval.y_val->v_tspec = typ;
- yylval.y_val->v_ansiu = ansiu;
- yylval.y_val->v_quad = (int64_t)uq;
- return (T_CON);
- }
- /*
- * Returns 1 if t is a signed type and the value is negative.
- *
- * len is the number of significant bits. If len is -1, len is set
- * to the width of type t.
- */
- int
- sign(int64_t q, tspec_t t, int len)
- {
- if (t == PTR || isutyp(t))
- return (0);
- return (msb(q, t, len));
- }
- int
- msb(int64_t q, tspec_t t, int len)
- {
- if (len <= 0)
- len = size(t);
- return ((q & qbmasks[len - 1]) != 0);
- }
- /*
- * Extends the sign of q.
- */
- int64_t
- xsign(int64_t q, tspec_t t, int len)
- {
- if (len <= 0)
- len = size(t);
- if (t == PTR || isutyp(t) || !sign(q, t, len)) {
- q &= qlmasks[len];
- } else {
- q |= qumasks[len];
- }
- return (q);
- }
- /*
- * Convert a string representing a floating point value into its interal
- * representation. Type and value are returned in yylval. fcon()
- * (and yylex()) returns T_CON.
- * XXX Currently it is not possible to convert constants of type
- * long double which are greater than DBL_MAX.
- */
- static int
- fcon(void)
- {
- const char *cp;
- int len;
- tspec_t typ;
- char c, *eptr;
- double d;
- float f = 0;
- cp = yytext;
- len = yyleng;
- if ((c = cp[len - 1]) == 'f' || c == 'F') {
- typ = FLOAT;
- len--;
- } else if (c == 'l' || c == 'L') {
- typ = LDOUBLE;
- len--;
- } else {
- typ = DOUBLE;
- }
- if (tflag && typ != DOUBLE) {
- /* suffixes F and L are illegal in traditional C */
- warning(98);
- }
- errno = 0;
- d = strtod(cp, &eptr);
- if (eptr != cp + len)
- lerror("fcon() 1");
- if (errno != 0)
- /* floating-point constant out of range */
- warning(248);
- if (typ == FLOAT) {
- f = (float)d;
- if (!finite(f)) {
- /* floating-point constant out of range */
- warning(248);
- f = f > 0 ? FLT_MAX : -FLT_MAX;
- }
- }
- if ((yylval.y_val = calloc(1, sizeof (val_t))) == NULL)
- nomem();
- yylval.y_val->v_tspec = typ;
- if (typ == FLOAT) {
- yylval.y_val->v_ldbl = f;
- } else {
- yylval.y_val->v_ldbl = d;
- }
- return (T_CON);
- }
- static int
- operator(int t, op_t o)
- {
- yylval.y_op = o;
- return (t);
- }
- /*
- * Called if lex found a leading \'.
- */
- static int
- ccon(void)
- {
- int n, val, c;
- char cv;
- n = 0;
- val = 0;
- while ((c = getescc('\'')) >= 0) {
- val = (val << CHAR_BIT) + c;
- n++;
- }
- if (c == -2) {
- /* unterminated character constant */
- error(253);
- } else {
- if (n > sizeof (int) || (n > 1 && (pflag || hflag))) {
- /* too many characters in character constant */
- error(71);
- } else if (n > 1) {
- /* multi-character character constant */
- warning(294);
- } else if (n == 0) {
- /* empty character constant */
- error(73);
- }
- }
- if (n == 1) {
- cv = (char)val;
- val = cv;
- }
- yylval.y_val = xcalloc(1, sizeof (val_t));
- yylval.y_val->v_tspec = INT;
- yylval.y_val->v_quad = val;
- return (T_CON);
- }
- /*
- * Called if lex found a leading L\'
- */
- static int
- wccon(void)
- {
- static char buf[MB_LEN_MAX + 1];
- int i, c;
- wchar_t wc;
- i = 0;
- while ((c = getescc('\'')) >= 0) {
- if (i < MB_CUR_MAX)
- buf[i] = (char)c;
- i++;
- }
- wc = 0;
- if (c == -2) {
- /* unterminated character constant */
- error(253);
- } else if (c == 0) {
- /* empty character constant */
- error(73);
- } else {
- if (i > MB_CUR_MAX) {
- i = MB_CUR_MAX;
- /* too many characters in character constant */
- error(71);
- } else {
- buf[i] = '\0';
- (void)mbtowc(NULL, NULL, 0);
- if (mbtowc(&wc, buf, MB_CUR_MAX) < 0)
- /* invalid multibyte character */
- error(291);
- }
- }
- if ((yylval.y_val = calloc(1, sizeof (val_t))) == NULL)
- nomem();
- yylval.y_val->v_tspec = WCHAR;
- yylval.y_val->v_quad = wc;
- return (T_CON);
- }
- /*
- * Read a character which is part of a character constant or of a string
- * and handle escapes.
- *
- * The Argument is the character which delimits the character constant or
- * string.
- *
- * Returns -1 if the end of the character constant or string is reached,
- * -2 if the EOF is reached, and the character otherwise.
- */
- static int
- getescc(int d)
- {
- static int pbc = -1;
- int n, c, v;
- if (pbc == -1) {
- c = inpc();
- } else {
- c = pbc;
- pbc = -1;
- }
- if (c == d)
- return (-1);
- switch (c) {
- case '\n':
- if (tflag) {
- /* newline in string or char constant */
- error(254);
- return (-2);
- }
- return (c);
- case EOF:
- return (-2);
- case '\\':
- switch (c = inpc()) {
- case '"':
- if (tflag && d == '\'')
- /* \" inside character constant undef. ... */
- warning(262);
- return ('"');
- case '\'':
- return ('\'');
- case '?':
- if (tflag)
- /* \? undefined in traditional C */
- warning(263);
- return ('?');
- case '\\':
- return ('\\');
- case 'a':
- if (tflag)
- /* \a undefined in traditional C */
- warning(81);
- return ('\a');
- case 'b':
- return ('\b');
- case 'f':
- return ('\f');
- case 'n':
- return ('\n');
- case 'r':
- return ('\r');
- case 't':
- return ('\t');
- case 'v':
- if (tflag)
- /* \v undefined in traditional C */
- warning(264);
- return ('\v');
- case '8': case '9':
- /* bad octal digit %c */
- warning(77, c);
- /* FALLTHROUGH */
- case '0': case '1': case '2': case '3':
- case '4': case '5': case '6': case '7':
- n = 3;
- v = 0;
- do {
- v = (v << 3) + (c - '0');
- c = inpc();
- } while (--n && isdigit(c) && (tflag || c <= '7'));
- if (tflag && n > 0 && isdigit(c))
- /* bad octal digit %c */
- warning(77, c);
- pbc = c;
- if (v > UCHAR_MAX) {
- /* character escape does not fit in char. */
- warning(76);
- v &= CHAR_MASK;
- }
- return (v);
- case 'x':
- if (tflag)
- /* \x undefined in traditional C */
- warning(82);
- v = 0;
- n = 0;
- while ((c = inpc()) >= 0 && isxdigit(c)) {
- c = isdigit(c) ?
- c - '0' : toupper(c) - 'A' + 10;
- v = (v << 4) + c;
- if (n >= 0) {
- if ((v & ~CHAR_MASK) != 0) {
- /* overflow in hex escape */
- warning(75);
- n = -1;
- } else {
- n++;
- }
- }
- }
- pbc = c;
- if (n == 0) {
- /* no hex digits follow \x */
- error(74);
- } if (n == -1) {
- v &= CHAR_MASK;
- }
- return (v);
- case '\n':
- return (getescc(d));
- case EOF:
- return (-2);
- default:
- if (isprint(c)) {
- /* dubious escape \%c */
- warning(79, c);
- } else {
- /* dubious escape \%o */
- warning(80, c);
- }
- }
- }
- return (c);
- }
- /*
- * Called for preprocessor directives. Currently implemented are:
- * # lineno
- * # lineno "filename"
- */
- static void
- directive(void)
- {
- const char *cp, *fn;
- char c, *eptr;
- size_t fnl;
- long ln;
- static int first = 1;
- /* Go to first non-whitespace after # */
- for (cp = yytext + 1; (c = *cp) == ' ' || c == '\t'; cp++)
- continue;
- if (!isdigit((unsigned char)c)) {
- error:
- /* undefined or invalid # directive */
- warning(255);
- return;
- }
- ln = strtol(--cp, &eptr, 10);
- if (cp == eptr)
- goto error;
- if ((c = *(cp = eptr)) != ' ' && c != '\t' && c != '\0')
- goto error;
- while ((c = *cp++) == ' ' || c == '\t')
- continue;
- if (c != '\0') {
- if (c != '"')
- goto error;
- fn = cp;
- while ((c = *cp) != '"' && c != '\0')
- cp++;
- if (c != '"')
- goto error;
- if ((fnl = cp++ - fn) > PATH_MAX)
- goto error;
- while ((c = *cp++) == ' ' || c == '\t')
- continue;
- #if 0
- if (c != '\0')
- warning("extra character(s) after directive");
- #endif
- /* empty string means stdin */
- if (fnl == 0) {
- fn = "{standard input}";
- fnl = 16; /* strlen (fn) */
- }
- curr_pos.p_file = fnnalloc(fn, fnl);
- /*
- * If this is the first directive, the name is the name
- * of the C source file as specified at the command line.
- * It is written to the output file.
- */
- if (first) {
- csrc_pos.p_file = curr_pos.p_file;
- outsrc(curr_pos.p_file);
- first = 0;
- }
- }
- curr_pos.p_line = (int)ln - 1;
- curr_pos.p_uniq = 0;
- if (curr_pos.p_file == csrc_pos.p_file) {
- csrc_pos.p_line = (int)ln - 1;
- csrc_pos.p_uniq = 0;
- }
- }
- /*
- * Handle lint comments. Following comments are currently understood:
- * ARGSUSEDn
- * BITFIELDTYPE
- * CONSTCOND CONSTANTCOND CONSTANTCONDITION
- * FALLTHRU FALLTHROUGH
- * LINTLIBRARY
- * LINTED NOSTRICT
- * LONGLONG
- * NOTREACHED
- * PRINTFLIKEn
- * PROTOLIB
- * SCANFLIKEn
- * VARARGSn
- * If one of this comments is recognized, the arguments, if any, are
- * parsed and a function which handles this comment is called.
- */
- static void
- comment(void)
- {
- int c, lc;
- static struct {
- const char *keywd;
- int arg;
- void (*func)(int);
- } keywtab[] = {
- { "ARGSUSED", 1, argsused },
- { "BITFIELDTYPE", 0, bitfieldtype },
- { "CONSTCOND", 0, constcond },
- { "CONSTANTCOND", 0, constcond },
- { "CONSTANTCONDITION", 0, constcond },
- { "FALLTHRU", 0, fallthru },
- { "FALLTHROUGH", 0, fallthru },
- { "LINTLIBRARY", 0, lintlib },
- { "LINTED", 0, linted },
- { "LONGLONG", 0, longlong },
- { "NOSTRICT", 0, linted },
- { "NOTREACHED", 0, notreach },
- { "PRINTFLIKE", 1, printflike },
- { "PROTOLIB", 1, protolib },
- { "SCANFLIKE", 1, scanflike },
- { "VARARGS", 1, varargs },
- };
- char keywd[32];
- char arg[32];
- int l, i, a;
- int eoc;
- eoc = 0;
- /* Skip white spaces after the start of the comment */
- while ((c = inpc()) != EOF && isspace(c))
- continue;
- /* Read the potential keyword to keywd */
- l = 0;
- while (c != EOF && isupper(c) && l < sizeof (keywd) - 1) {
- keywd[l++] = (char)c;
- c = inpc();
- }
- keywd[l] = '\0';
- /* look for the keyword */
- for (i = 0; i < sizeof (keywtab) / sizeof (keywtab[0]); i++) {
- if (strcmp(keywtab[i].keywd, keywd) == 0)
- break;
- }
- if (i == sizeof (keywtab) / sizeof (keywtab[0]))
- goto skip_rest;
- /* skip white spaces after the keyword */
- while (c != EOF && isspace(c))
- c = inpc();
- /* read the argument, if the keyword accepts one and there is one */
- l = 0;
- if (keywtab[i].arg) {
- while (c != EOF && isdigit(c) && l < sizeof (arg) - 1) {
- arg[l++] = (char)c;
- c = inpc();
- }
- }
- arg[l] = '\0';
- a = l != 0 ? atoi(arg) : -1;
- /* skip white spaces after the argument */
- while (c != EOF && isspace(c))
- c = inpc();
- if (c != '*' || (c = inpc()) != '/') {
- if (keywtab[i].func != linted)
- /* extra characters in lint comment */
- warning(257);
- } else {
- /*
- * remember that we have already found the end of the
- * comment
- */
- eoc = 1;
- }
- if (keywtab[i].func != NULL)
- (*keywtab[i].func)(a);
- skip_rest:
- while (!eoc) {
- lc = c;
- if ((c = inpc()) == EOF) {
- /* unterminated comment */
- error(256);
- break;
- }
- if (lc == '*' && c == '/')
- eoc = 1;
- }
- }
- /*
- * Handle // style comments
- */
- static void
- slashslashcomment(void)
- {
- int c;
- if (sflag < 2 && !gflag)
- /* // comments only supported in C99 */
- (void)gnuism(312, tflag ? "traditional" : "ANSI");
- while ((c = inpc()) != EOF && c != '\n')
- continue;
- }
- /*
- * Clear flags for lint comments LINTED, LONGLONG and CONSTCOND.
- * clrwflgs() is called after function definitions and global and
- * local declarations and definitions. It is also called between
- * the controlling expression and the body of control statements
- * (if, switch, for, while).
- */
- void
- clrwflgs(void)
- {
- nowarn = 0;
- quadflg = 0;
- ccflg = 0;
- }
- /*
- * Strings are stored in a dynamically alloceted buffer and passed
- * in yylval.y_xstrg to the parser. The parser or the routines called
- * by the parser are responsible for freeing this buffer.
- */
- static int
- string(void)
- {
- u_char *s;
- int c;
- size_t len, max;
- strg_t *strg;
- if ((s = malloc(max = 64)) == NULL)
- nomem();
- len = 0;
- while ((c = getescc('"')) >= 0) {
- /* +1 to reserve space for a trailing NUL character */
- if (len + 1 == max)
- if ((s = realloc(s, max *= 2)) == NULL)
- nomem();
- s[len++] = (char)c;
- }
- s[len] = '\0';
- if (c == -2)
- /* unterminated string constant */
- error(258);
- if ((strg = calloc(1, sizeof (strg_t))) == NULL)
- nomem();
- strg->st_tspec = CHAR;
- strg->st_len = len;
- strg->st_cp = s;
- yylval.y_strg = strg;
- return (T_STRING);
- }
- static int
- wcstrg(void)
- {
- char *s;
- int c, i, n, wi;
- size_t len, max, wlen;
- wchar_t *ws;
- strg_t *strg;
- if ((s = malloc(max = 64)) == NULL)
- nomem();
- len = 0;
- while ((c = getescc('"')) >= 0) {
- /* +1 to save space for a trailing NUL character */
- if (len + 1 >= max)
- if ((s = realloc(s, max *= 2)) == NULL)
- nomem();
- s[len++] = (char)c;
- }
- s[len] = '\0';
- if (c == -2)
- /* unterminated string constant */
- error(258);
- /* get length of wide character string */
- (void)mblen(NULL, 0);
- for (i = 0, wlen = 0; i < len; i += n, wlen++) {
- if ((n = mblen(&s[i], MB_CUR_MAX)) == -1) {
- /* invalid multibyte character */
- error(291);
- break;
- }
- if (n == 0)
- n = 1;
- }
- if ((ws = malloc((wlen + 1) * sizeof (wchar_t))) == NULL)
- nomem();
- /* convert from multibyte to wide char */
- (void)mbtowc(NULL, NULL, 0);
- for (i = 0, wi = 0; i < len; i += n, wi++) {
- if ((n = mbtowc(&ws[wi], &s[i], MB_CUR_MAX)) == -1)
- break;
- if (n == 0)
- n = 1;
- }
- ws[wi] = 0;
- free(s);
- if ((strg = calloc(1, sizeof (strg_t))) == NULL)
- nomem();
- strg->st_tspec = WCHAR;
- strg->st_len = wlen;
- strg->st_wcp = ws;
- yylval.y_strg = strg;
- return (T_STRING);
- }
- /*
- * As noted above the scanner does not create new symbol table entries
- * for symbols it cannot find in the symbol table. This is to avoid
- * putting undeclared symbols into the symbol table if a syntax error
- * occurs.
- *
- * getsym() is called as soon as it is probably ok to put the symbol to
- * the symbol table. This does not mean that it is not possible that
- * symbols are put to the symbol table which are than not completely
- * declared due to syntax errors. To avoid too many problems in this
- * case symbols get type int in getsym().
- *
- * XXX calls to getsym() should be delayed until decl1*() is called
- */
- sym_t *
- getsym(sbuf_t *sb)
- {
- dinfo_t *di;
- char *s;
- sym_t *sym;
- sym = sb->sb_sym;
- /*
- * During member declaration it is possible that name() looked
- * for symbols of type FVFT, although it should have looked for
- * symbols of type FTAG. Same can happen for labels. Both cases
- * are compensated here.
- */
- if (symtyp == FMOS || symtyp == FLAB) {
- if (sym == NULL || sym->s_kind == FVFT)
- sym = search(sb);
- }
- if (sym != NULL) {
- if (sym->s_kind != symtyp)
- lerror("storesym() 1");
- symtyp = FVFT;
- freesb(sb);
- return (sym);
- }
- /* create a new symbol table entry */
- /* labels must always be allocated at level 1 (outhermost block) */
- if (symtyp == FLAB) {
- sym = getlblk(1, sizeof (sym_t));
- s = getlblk(1, sb->sb_len + 1);
- (void)memcpy(s, sb->sb_name, sb->sb_len + 1);
- sym->s_name = s;
- sym->s_blklev = 1;
- di = dcs;
- while (di->d_nxt != NULL && di->d_nxt->d_nxt != NULL)
- di = di->d_nxt;
- if (di->d_ctx != AUTO)
- lerror("storesym() 2");
- } else {
- sym = getblk(sizeof (sym_t));
- sym->s_name = sb->sb_name;
- sym->s_blklev = blklev;
- di = dcs;
- }
- UNIQUE_CURR_POS(sym->s_dpos);
- if ((sym->s_kind = symtyp) != FLAB)
- sym->s_type = gettyp(INT);
- symtyp = FVFT;
- if ((sym->s_link = symtab[sb->sb_hash]) != NULL)
- symtab[sb->sb_hash]->s_rlink = &sym->s_link;
- (symtab[sb->sb_hash] = sym)->s_rlink = &symtab[sb->sb_hash];
- *di->d_ldlsym = sym;
- di->d_ldlsym = &sym->s_dlnxt;
- freesb(sb);
- return (sym);
- }
- /*
- * Remove a symbol forever from the symbol table. s_blklev
- * is set to -1 to avoid that the symbol will later be put
- * back to the symbol table.
- */
- void
- rmsym(sym_t *sym)
- {
- if ((*sym->s_rlink = sym->s_link) != NULL)
- sym->s_link->s_rlink = sym->s_rlink;
- sym->s_blklev = -1;
- sym->s_link = NULL;
- }
- /*
- * Remove a list of symbols declared at one level from the symbol
- * table.
- */
- void
- rmsyms(sym_t *syms)
- {
- sym_t *sym;
- for (sym = syms; sym != NULL; sym = sym->s_dlnxt) {
- if (sym->s_blklev != -1) {
- if ((*sym->s_rlink = sym->s_link) != NULL)
- sym->s_link->s_rlink = sym->s_rlink;
- sym->s_link = NULL;
- sym->s_rlink = NULL;
- }
- }
- }
- /*
- * Put a symbol into the symbol table
- */
- void
- inssym(int bl, sym_t *sym)
- {
- int h;
- h = hash(sym->s_name);
- if ((sym->s_link = symtab[h]) != NULL)
- symtab[h]->s_rlink = &sym->s_link;
- (symtab[h] = sym)->s_rlink = &symtab[h];
- sym->s_blklev = bl;
- if (sym->s_link != NULL && sym->s_blklev < sym->s_link->s_blklev)
- lerror("inssym()");
- }
- /*
- * Called at level 0 after syntax errors
- * Removes all symbols which are not declared at level 0 from the
- * symbol table. Also frees all memory which is not associated with
- * level 0.
- */
- void
- cleanup(void)
- {
- sym_t *sym, *nsym;
- int i;
- for (i = 0; i < HSHSIZ1; i++) {
- for (sym = symtab[i]; sym != NULL; sym = nsym) {
- nsym = sym->s_link;
- if (sym->s_blklev >= 1) {
- if ((*sym->s_rlink = nsym) != NULL)
- nsym->s_rlink = sym->s_rlink;
- }
- }
- }
- for (i = mblklev; i > 0; i--)
- freelblk(i);
- }
- /*
- * Create a new symbol with the name of an existing symbol.
- */
- sym_t *
- pushdown(sym_t *sym)
- {
- int h;
- sym_t *nsym;
- h = hash(sym->s_name);
- nsym = getblk(sizeof (sym_t));
- if (sym->s_blklev > blklev)
- lerror("pushdown()");
- nsym->s_name = sym->s_name;
- UNIQUE_CURR_POS(nsym->s_dpos);
- nsym->s_kind = sym->s_kind;
- nsym->s_blklev = blklev;
- if ((nsym->s_link = symtab[h]) != NULL)
- symtab[h]->s_rlink = &nsym->s_link;
- (symtab[h] = nsym)->s_rlink = &symtab[h];
- *dcs->d_ldlsym = nsym;
- dcs->d_ldlsym = &nsym->s_dlnxt;
- return (nsym);
- }
- /*
- * Free any dynamically allocated memory referenced by
- * the value stack or yylval.
- * The type of information in yylval is described by tok.
- */
- void
- freeyyv(void *sp, int tok)
- {
- if (tok == T_NAME || tok == T_TYPENAME) {
- sbuf_t *sb = *(sbuf_t **)sp;
- freesb(sb);
- } else if (tok == T_CON) {
- val_t *val = *(val_t **)sp;
- free(val);
- } else if (tok == T_STRING) {
- strg_t *strg = *(strg_t **)sp;
- if (strg->st_tspec == CHAR) {
- free(strg->st_cp);
- } else if (strg->st_tspec == WCHAR) {
- free(strg->st_wcp);
- } else {
- lerror("fryylv() 1");
- }
- free(strg);
- }
- }