diff options
Diffstat (limited to 'scripts/config/zconf.l')
| -rw-r--r-- | scripts/config/zconf.l | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/scripts/config/zconf.l b/scripts/config/zconf.l new file mode 100644 index 0000000..a412bf4 --- /dev/null +++ b/scripts/config/zconf.l @@ -0,0 +1,332 @@ +%option backup nostdinit noyywrap never-interactive full ecs +%option 8bit backup nodefault perf-report perf-report +%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 <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#define LKC_DIRECT_LINK +#include "lkc.h" +#include "zconf.tab.h" + +#define START_STRSIZE 16 + +char *text; +static char *text_ptr; +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 struct buffer *zconf_endfile(void); + +void new_string(void) +{ + text = malloc(START_STRSIZE); + text_asize = START_STRSIZE; + text_ptr = text; + text_size = 0; + *text_ptr = 0; +} + +void append_string(const char *str, int size) +{ + int new_size = text_size + size + 1; + if (new_size > text_asize) { + text = realloc(text, new_size); + text_asize = new_size; + text_ptr = text + text_size; + } + memcpy(text_ptr, str, size); + text_ptr += size; + text_size += size; + *text_ptr = 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 current_file->lineno++; +[ \t]*#.* + +[ \t]*\n current_file->lineno++; return T_EOL; + +[ \t]+ { + BEGIN(COMMAND); +} + +. { + unput(yytext[0]); + BEGIN(COMMAND); +} + + +<COMMAND>{ + "mainmenu" BEGIN(PARAM); return T_MAINMENU; + "menu" BEGIN(PARAM); return T_MENU; + "endmenu" BEGIN(PARAM); return T_ENDMENU; + "source" BEGIN(PARAM); return T_SOURCE; + "choice" BEGIN(PARAM); return T_CHOICE; + "endchoice" BEGIN(PARAM); return T_ENDCHOICE; + "comment" BEGIN(PARAM); return T_COMMENT; + "config" BEGIN(PARAM); return T_CONFIG; + "help" BEGIN(PARAM); return T_HELP; + "if" BEGIN(PARAM); return T_IF; + "endif" BEGIN(PARAM); return T_ENDIF; + "depends" BEGIN(PARAM); return T_DEPENDS; + "requires" BEGIN(PARAM); return T_REQUIRES; + "optional" BEGIN(PARAM); return T_OPTIONAL; + "default" BEGIN(PARAM); return T_DEFAULT; + "prompt" BEGIN(PARAM); return T_PROMPT; + "tristate" BEGIN(PARAM); return T_TRISTATE; + "bool" BEGIN(PARAM); return T_BOOLEAN; + "boolean" BEGIN(PARAM); return T_BOOLEAN; + "int" BEGIN(PARAM); return T_INT; + "hex" BEGIN(PARAM); return T_HEX; + "string" BEGIN(PARAM); return T_STRING; + {n}+ { + alloc_string(yytext, yyleng); + zconflval.string = text; + return T_WORD; + } + . + \n current_file->lineno++; BEGIN(INITIAL); +} + +<PARAM>{ + "&&" return T_AND; + "||" return T_OR; + "(" return T_OPEN_PAREN; + ")" return T_CLOSE_PAREN; + "!" return T_NOT; + "=" return T_EQUAL; + "!=" return T_UNEQUAL; + "if" return T_IF; + "on" return T_ON; + \"|\' { + str = yytext[0]; + new_string(); + BEGIN(STRING); + } + \n BEGIN(INITIAL); current_file->lineno++; return T_EOL; + --- /* ignore */ + ({n}|[-/.])+ { + alloc_string(yytext, yyleng); + zconflval.string = text; + return T_WORD; + } + . + <<EOF>> { + BEGIN(INITIAL); + } +} + +<STRING>{ + [^'"\\\n]+/\n { + append_string(yytext, yyleng); + zconflval.string = text; + return T_STRING; + } + [^'"\\\n]+ { + append_string(yytext, yyleng); + } + \\.?/\n { + append_string(yytext+1, yyleng); + zconflval.string = text; + return T_STRING; + } + \\.? { + append_string(yytext+1, yyleng); + } + \'|\" { + if (str == yytext[0]) { + BEGIN(PARAM); + zconflval.string = text; + return T_STRING; + } else + append_string(yytext, 1); + } + \n { + printf("%s:%d:warning: multi-line strings not supported\n", zconf_curname(), zconf_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); + } + + } + \n/[^ \t\n] { + current_file->lineno++; + zconf_endhelp(); + return T_HELPTEXT; + } + [ \t]*\n { + current_file->lineno++; + append_string("\n", 1); + } + [^ \t\n].* { + append_string(yytext, yyleng); + if (!first_ts) + first_ts = last_ts; + } + <<EOF>> { + zconf_endhelp(); + return T_HELPTEXT; + } +} + +<<EOF>> { + if (current_buf) { + zconf_endfile(); + return T_EOF; + } + 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); +} + +void zconf_initscan(const char *name) +{ + yyin = fopen(name, "r"); + 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 = fopen(name, "r"); + 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("recursive scan (%s)?\n", name); + exit(1); + } + if (file->flags & FILE_SCANNED) { + printf("file %s already scanned?\n", name); + exit(1); + } + file->flags |= FILE_BUSY; + file->lineno = 1; + file->parent = current_file; + current_file = file; +} + +static struct buffer *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; + + return parent; +} + +int zconf_lineno(void) +{ + if (current_buf) + return current_file->lineno; + else + return 0; +} + +char *zconf_curname(void) +{ + if (current_buf) + return current_file->name; + else + return "<none>"; +} |