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/*
* Copyright © 2012 Ran Benita <ran234@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "xkbcomp-priv.h"
#include "parser-priv.h"
#include "scanner-utils.h"
static void
scanner_log(enum xkb_log_level level, struct scanner *s, const char *msg)
{
xkb_log(s->ctx, level, 0, "%s:%d:%d: %s\n", s->file_name,
s->token_line, s->token_column, msg);
}
int
scanner_error(struct scanner *s, const char *msg)
{
scanner_log(XKB_LOG_LEVEL_ERROR, s, msg);
return ERROR_TOK;
}
void
scanner_warn(struct scanner *s, const char *msg)
{
scanner_log(XKB_LOG_LEVEL_WARNING, s, msg);
}
static bool
number(struct scanner *s, int64_t *out, int *out_tok)
{
bool is_float = false, is_hex = false;
const char *start = s->s + s->pos;
char *end;
if (lit(s, "0x")) {
while (is_xdigit(peek(s))) next(s);
is_hex = true;
}
else {
while (is_digit(peek(s))) next(s);
is_float = chr(s, '.');
while (is_digit(peek(s))) next(s);
}
if (s->s + s->pos == start)
return false;
errno = 0;
if (is_hex)
*out = strtoul(start, &end, 16);
else if (is_float)
*out = strtod(start, &end);
else
*out = strtoul(start, &end, 10);
if (errno != 0 || s->s + s->pos != end)
*out_tok = ERROR_TOK;
else
*out_tok = (is_float ? FLOAT : INTEGER);
return true;
}
int
_xkbcommon_lex(YYSTYPE *yylval, struct scanner *s)
{
int tok;
skip_more_whitespace_and_comments:
/* Skip spaces. */
while (is_space(peek(s))) next(s);
/* Skip comments. */
if (lit(s, "//") || chr(s, '#')) {
while (!eof(s) && !eol(s)) next(s);
goto skip_more_whitespace_and_comments;
}
/* See if we're done. */
if (eof(s)) return END_OF_FILE;
/* New token. */
s->token_line = s->line;
s->token_column = s->column;
s->buf_pos = 0;
/* String literal. */
if (chr(s, '\"')) {
while (!eof(s) && !eol(s) && peek(s) != '\"') {
if (chr(s, '\\')) {
uint8_t o;
if (chr(s, '\\')) buf_append(s, '\\');
else if (chr(s, 'n')) buf_append(s, '\n');
else if (chr(s, 't')) buf_append(s, '\t');
else if (chr(s, 'r')) buf_append(s, '\r');
else if (chr(s, 'b')) buf_append(s, '\b');
else if (chr(s, 'f')) buf_append(s, '\f');
else if (chr(s, 'v')) buf_append(s, '\v');
else if (chr(s, 'e')) buf_append(s, '\033');
else if (oct(s, &o)) buf_append(s, (char) o);
else {
scanner_warn(s, "unknown escape sequence in string literal");
/* Ignore. */
}
} else {
buf_append(s, next(s));
}
}
if (!buf_append(s, '\0') || !chr(s, '\"'))
return scanner_error(s, "unterminated string literal");
yylval->str = strdup(s->buf);
if (!yylval->str)
return scanner_error(s, "scanner out of memory");
return STRING;
}
/* Key name literal. */
if (chr(s, '<')) {
while (is_graph(peek(s)) && peek(s) != '>')
buf_append(s, next(s));
if (!buf_append(s, '\0') || !chr(s, '>'))
return scanner_error(s, "unterminated key name literal");
/* Empty key name literals are allowed. */
yylval->sval = xkb_atom_intern(s->ctx, s->buf, s->buf_pos - 1);
return KEYNAME;
}
/* Operators and punctuation. */
if (chr(s, ';')) return SEMI;
if (chr(s, '{')) return OBRACE;
if (chr(s, '}')) return CBRACE;
if (chr(s, '=')) return EQUALS;
if (chr(s, '[')) return OBRACKET;
if (chr(s, ']')) return CBRACKET;
if (chr(s, '(')) return OPAREN;
if (chr(s, ')')) return CPAREN;
if (chr(s, '.')) return DOT;
if (chr(s, ',')) return COMMA;
if (chr(s, '+')) return PLUS;
if (chr(s, '-')) return MINUS;
if (chr(s, '*')) return TIMES;
if (chr(s, '/')) return DIVIDE;
if (chr(s, '!')) return EXCLAM;
if (chr(s, '~')) return INVERT;
/* Identifier. */
if (is_alpha(peek(s)) || peek(s) == '_') {
s->buf_pos = 0;
while (is_alnum(peek(s)) || peek(s) == '_')
buf_append(s, next(s));
if (!buf_append(s, '\0'))
return scanner_error(s, "identifier too long");
/* Keyword. */
tok = keyword_to_token(s->buf);
if (tok != -1) return tok;
yylval->str = strdup(s->buf);
if (!yylval->str)
return scanner_error(s, "scanner out of memory");
return IDENT;
}
/* Number literal (hexadecimal / decimal / float). */
if (number(s, &yylval->num, &tok)) {
if (tok == ERROR_TOK)
return scanner_error(s, "malformed number literal");
return tok;
}
return scanner_error(s, "unrecognized token");
}
XkbFile *
XkbParseString(struct xkb_context *ctx, const char *string, size_t len,
const char *file_name, const char *map)
{
struct scanner scanner;
scanner_init(&scanner, ctx, string, len, file_name);
return parse(ctx, &scanner, map);
}
XkbFile *
XkbParseFile(struct xkb_context *ctx, FILE *file,
const char *file_name, const char *map)
{
bool ok;
XkbFile *xkb_file;
const char *string;
size_t size;
ok = map_file(file, &string, &size);
if (!ok) {
log_err(ctx, "Couldn't read XKB file %s: %s\n",
file_name, strerror(errno));
return NULL;
}
xkb_file = XkbParseString(ctx, string, size, file_name, map);
unmap_file(string, size);
return xkb_file;
}
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