%option backup nostdinit noyywrap never-interactive full ecs %option 8bit backup nodefault perf-report perf-report %option noinput %x COMMAND HELP STRING PARAM %{ /* * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org> * Released under the terms of the GNU GPL v2.0. */ #include <limits.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #define LKC_DIRECT_LINK #include "lkc.h" #define START_STRSIZE 16 static struct { struct file *file; int lineno; } current_pos; static char *text; static int text_size, text_asize; struct buffer { struct buffer *parent; YY_BUFFER_STATE state; }; struct buffer *current_buf; static int last_ts, first_ts; static void zconf_endhelp(void); static void zconf_endfile(void); void new_string(void) { text = malloc(START_STRSIZE); text_asize = START_STRSIZE; text_size = 0; *text = 0; } void append_string(const char *str, int size) { int new_size = text_size + size + 1; if (new_size > text_asize) { new_size += START_STRSIZE - 1; new_size &= -START_STRSIZE; text = realloc(text, new_size); text_asize = new_size; } memcpy(text + text_size, str, size); text_size += size; text[text_size] = 0; } void alloc_string(const char *str, int size) { text = malloc(size + 1); memcpy(text, str, size); text[size] = 0; } %} ws [ \n\t] n [A-Za-z0-9_] %% int str = 0; int ts, i; [ \t]*#.*\n | [ \t]*\n { current_file->lineno++; return T_EOL; } [ \t]*#.* [ \t]+ { BEGIN(COMMAND); } . { unput(yytext[0]); BEGIN(COMMAND); } <COMMAND>{ {n}+ { struct kconf_id *id = kconf_id_lookup(yytext, yyleng); BEGIN(PARAM); current_pos.file = current_file; current_pos.lineno = current_file->lineno; if (id && id->flags & TF_COMMAND) { zconflval.id = id; return id->token; } alloc_string(yytext, yyleng); zconflval.string = text; return T_WORD; } . \n { BEGIN(INITIAL); current_file->lineno++; return T_EOL; } } <PARAM>{ "&&" return T_AND; "||" return T_OR; "(" return T_OPEN_PAREN; ")" return T_CLOSE_PAREN; "!" return T_NOT; "=" return T_EQUAL; "!=" return T_UNEQUAL; \"|\' { str = yytext[0]; new_string(); BEGIN(STRING); } \n BEGIN(INITIAL); current_file->lineno++; return T_EOL; --- /* ignore */ ({n}|[-/.])+ { struct kconf_id *id = kconf_id_lookup(yytext, yyleng); if (id && id->flags & TF_PARAM) { zconflval.id = id; return id->token; } alloc_string(yytext, yyleng); zconflval.string = text; return T_WORD; } #.* /* comment */ \\\n current_file->lineno++; . <<EOF>> { BEGIN(INITIAL); } } <STRING>{ [^'"\\\n]+/\n { append_string(yytext, yyleng); zconflval.string = text; return T_WORD_QUOTE; } [^'"\\\n]+ { append_string(yytext, yyleng); } \\.?/\n { append_string(yytext + 1, yyleng - 1); zconflval.string = text; return T_WORD_QUOTE; } \\.? { append_string(yytext + 1, yyleng - 1); } \'|\" { if (str == yytext[0]) { BEGIN(PARAM); zconflval.string = text; return T_WORD_QUOTE; } else append_string(yytext, 1); } \n { printf("%s:%d:warning: multi-line strings not supported\n", zconf_curname(), zconf_lineno()); current_file->lineno++; BEGIN(INITIAL); return T_EOL; } <<EOF>> { BEGIN(INITIAL); } } <HELP>{ [ \t]+ { ts = 0; for (i = 0; i < yyleng; i++) { if (yytext[i] == '\t') ts = (ts & ~7) + 8; else ts++; } last_ts = ts; if (first_ts) { if (ts < first_ts) { zconf_endhelp(); return T_HELPTEXT; } ts -= first_ts; while (ts > 8) { append_string(" ", 8); ts -= 8; } append_string(" ", ts); } } [ \t]*\n/[^ \t\n] { current_file->lineno++; zconf_endhelp(); return T_HELPTEXT; } [ \t]*\n { current_file->lineno++; append_string("\n", 1); } [^ \t\n].* { while (yyleng) { if ((yytext[yyleng-1] != ' ') && (yytext[yyleng-1] != '\t')) break; yyleng--; } append_string(yytext, yyleng); if (!first_ts) first_ts = last_ts; } <<EOF>> { zconf_endhelp(); return T_HELPTEXT; } } <<EOF>> { if (current_file) { zconf_endfile(); return T_EOL; } fclose(yyin); yyterminate(); } %% void zconf_starthelp(void) { new_string(); last_ts = first_ts = 0; BEGIN(HELP); } static void zconf_endhelp(void) { zconflval.string = text; BEGIN(INITIAL); } /* * Try to open specified file with following names: * ./name * $(srctree)/name * The latter is used when srctree is separate from objtree * when compiling the kernel. * Return NULL if file is not found. */ FILE *zconf_fopen(const char *name) { char *env, fullname[PATH_MAX+1]; FILE *f; f = fopen(name, "r"); if (!f && name != NULL && name[0] != '/') { env = getenv(SRCTREE); if (env) { sprintf(fullname, "%s/%s", env, name); f = fopen(fullname, "r"); } } return f; } void zconf_initscan(const char *name) { yyin = zconf_fopen(name); if (!yyin) { printf("can't find file %s\n", name); exit(1); } current_buf = malloc(sizeof(*current_buf)); memset(current_buf, 0, sizeof(*current_buf)); current_file = file_lookup(name); current_file->lineno = 1; current_file->flags = FILE_BUSY; } void zconf_nextfile(const char *name) { struct file *file = file_lookup(name); struct buffer *buf = malloc(sizeof(*buf)); memset(buf, 0, sizeof(*buf)); current_buf->state = YY_CURRENT_BUFFER; yyin = zconf_fopen(name); if (!yyin) { printf("%s:%d: can't open file \"%s\"\n", zconf_curname(), zconf_lineno(), name); exit(1); } yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE)); buf->parent = current_buf; current_buf = buf; if (file->flags & FILE_BUSY) { printf("%s:%d: do not source '%s' from itself\n", zconf_curname(), zconf_lineno(), name); exit(1); } if (file->flags & FILE_SCANNED) { printf("%s:%d: file '%s' is already sourced from '%s'\n", zconf_curname(), zconf_lineno(), name, file->parent->name); exit(1); } file->flags |= FILE_BUSY; file->lineno = 1; file->parent = current_file; current_file = file; } static void zconf_endfile(void) { struct buffer *parent; current_file->flags |= FILE_SCANNED; current_file->flags &= ~FILE_BUSY; current_file = current_file->parent; parent = current_buf->parent; if (parent) { fclose(yyin); yy_delete_buffer(YY_CURRENT_BUFFER); yy_switch_to_buffer(parent->state); } free(current_buf); current_buf = parent; } int zconf_lineno(void) { return current_pos.lineno; } char *zconf_curname(void) { return current_pos.file ? current_pos.file->name : "<none>"; }