/* $NetBSD: dtc-lexer.l,v 1.3.8.1 2022/05/17 10:23:17 bouyer Exp $ */ /* * (C) Copyright David Gibson , IBM Corporation. 2005. * * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */ %option noyywrap nounput noinput never-interactive %x BYTESTRING %x PROPNODENAME %s V1 PROPNODECHAR [a-zA-Z0-9,._+*#?@-] PATHCHAR ({PROPNODECHAR}|[/]) LABEL [a-zA-Z_][a-zA-Z0-9_]* STRING \"([^\\"]|\\.)*\" CHAR_LITERAL '([^']|\\')*' WS [[:space:]] COMMENT "/*"([^*]|\*+[^*/])*\*+"/" LINECOMMENT "//".*\n %{ #include "dtc.h" #include "srcpos.h" #include "dtc-parser.h" extern YYLTYPE yylloc; extern bool treesource_error; /* CAUTION: this will stop working if we ever use yyless() or yyunput() */ #define YY_USER_ACTION \ { \ srcpos_update(&yylloc, yytext, yyleng); \ } /*#define LEXDEBUG 1*/ #ifdef LEXDEBUG #define DPRINT(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__) #else #define DPRINT(fmt, ...) do { } while (0) #endif static int dts_version = 1; #define BEGIN_DEFAULT() DPRINT("\n"); \ BEGIN(V1); \ static void push_input_file(const char *filename); static bool pop_input_file(void); static void PRINTF(1, 2) lexical_error(const char *fmt, ...); %} %% <*>"/include/"{WS}*{STRING} { char *name = strchr(yytext, '\"') + 1; yytext[yyleng-1] = '\0'; push_input_file(name); } <*>^"#"(line)?[ \t]+[0-9]+[ \t]+{STRING}([ \t]+[0-9]+)? { char *line, *fnstart, *fnend; struct data fn; /* skip text before line # */ line = yytext; while (!isdigit((unsigned char)*line)) line++; /* regexp ensures that first and list " * in the whole yytext are those at * beginning and end of the filename string */ fnstart = memchr(yytext, '"', yyleng); for (fnend = yytext + yyleng - 1; *fnend != '"'; fnend--) ; assert(fnstart && fnend && (fnend > fnstart)); fn = data_copy_escape_string(fnstart + 1, fnend - fnstart - 1); /* Don't allow nuls in filenames */ if (memchr(fn.val, '\0', fn.len - 1)) lexical_error("nul in line number directive"); /* -1 since #line is the number of the next line */ srcpos_set_line(xstrdup(fn.val), atoi(line) - 1); data_free(fn); } <*><> { if (!pop_input_file()) { yyterminate(); } } <*>{STRING} { DPRINT("String: %s\n", yytext); yylval.data = data_copy_escape_string(yytext+1, yyleng-2); return DT_STRING; } <*>"/dts-v1/" { DPRINT("Keyword: /dts-v1/\n"); dts_version = 1; BEGIN_DEFAULT(); return DT_V1; } <*>"/plugin/" { DPRINT("Keyword: /plugin/\n"); return DT_PLUGIN; } <*>"/memreserve/" { DPRINT("Keyword: /memreserve/\n"); BEGIN_DEFAULT(); return DT_MEMRESERVE; } <*>"/bits/" { DPRINT("Keyword: /bits/\n"); BEGIN_DEFAULT(); return DT_BITS; } <*>"/delete-property/" { DPRINT("Keyword: /delete-property/\n"); DPRINT("\n"); BEGIN(PROPNODENAME); return DT_DEL_PROP; } <*>"/delete-node/" { DPRINT("Keyword: /delete-node/\n"); DPRINT("\n"); BEGIN(PROPNODENAME); return DT_DEL_NODE; } <*>{LABEL}: { DPRINT("Label: %s\n", yytext); yylval.labelref = xstrdup(yytext); yylval.labelref[yyleng-1] = '\0'; return DT_LABEL; } ([0-9]+|0[xX][0-9a-fA-F]+)(U|L|UL|LL|ULL)? { char *e; DPRINT("Integer Literal: '%s'\n", yytext); errno = 0; yylval.integer = strtoull(yytext, &e, 0); if (*e && e[strspn(e, "UL")]) { lexical_error("Bad integer literal '%s'", yytext); } if (errno == ERANGE) lexical_error("Integer literal '%s' out of range", yytext); else /* ERANGE is the only strtoull error triggerable * by strings matching the pattern */ assert(errno == 0); return DT_LITERAL; } <*>{CHAR_LITERAL} { struct data d; DPRINT("Character literal: %s\n", yytext); d = data_copy_escape_string(yytext+1, yyleng-2); if (d.len == 1) { lexical_error("Empty character literal"); yylval.integer = 0; } else { yylval.integer = (unsigned char)d.val[0]; if (d.len > 2) lexical_error("Character literal has %d" " characters instead of 1", d.len - 1); } data_free(d); return DT_CHAR_LITERAL; } <*>\&{LABEL} { /* label reference */ DPRINT("Ref: %s\n", yytext+1); yylval.labelref = xstrdup(yytext+1); return DT_REF; } <*>"&{/"{PATHCHAR}*\} { /* new-style path reference */ yytext[yyleng-1] = '\0'; DPRINT("Ref: %s\n", yytext+2); yylval.labelref = xstrdup(yytext+2); return DT_REF; } [0-9a-fA-F]{2} { yylval.byte = strtol(yytext, NULL, 16); DPRINT("Byte: %02x\n", (int)yylval.byte); return DT_BYTE; } "]" { DPRINT("/BYTESTRING\n"); BEGIN_DEFAULT(); return ']'; } \\?{PROPNODECHAR}+ { DPRINT("PropNodeName: %s\n", yytext); yylval.propnodename = xstrdup((yytext[0] == '\\') ? yytext + 1 : yytext); BEGIN_DEFAULT(); return DT_PROPNODENAME; } "/incbin/" { DPRINT("Binary Include\n"); return DT_INCBIN; } <*>{WS}+ /* eat whitespace */ <*>{COMMENT}+ /* eat C-style comments */ <*>{LINECOMMENT}+ /* eat C++-style comments */ <*>"<<" { return DT_LSHIFT; }; <*>">>" { return DT_RSHIFT; }; <*>"<=" { return DT_LE; }; <*>">=" { return DT_GE; }; <*>"==" { return DT_EQ; }; <*>"!=" { return DT_NE; }; <*>"&&" { return DT_AND; }; <*>"||" { return DT_OR; }; <*>. { DPRINT("Char: %c (\\x%02x)\n", yytext[0], (unsigned)yytext[0]); if (yytext[0] == '[') { DPRINT("\n"); BEGIN(BYTESTRING); } if ((yytext[0] == '{') || (yytext[0] == ';')) { DPRINT("\n"); BEGIN(PROPNODENAME); } return yytext[0]; } %% static void push_input_file(const char *filename) { assert(filename); srcfile_push(filename); yyin = current_srcfile->f; yypush_buffer_state(yy_create_buffer(yyin, YY_BUF_SIZE)); } static bool pop_input_file(void) { if (srcfile_pop() == 0) return false; yypop_buffer_state(); yyin = current_srcfile->f; return true; } static void lexical_error(const char *fmt, ...) { va_list ap; va_start(ap, fmt); srcpos_verror(&yylloc, "Lexical error", fmt, ap); va_end(ap); treesource_error = true; }