#define DUMP_TOKENS 0
-struct lexer
+struct lexer
{
struct string line_buffer;
char tokid [LONG_NAME_LEN + 1]; /* T_ID: the identifier. */
struct string tokstr; /* T_ID, T_STRING: token string value.
- For T_ID, this is not truncated as is
+ For T_ID, this is not truncated as is
tokid. */
char *prog; /* Pointer to next token in line_buffer. */
int put_token ; /* If nonzero, next token returned by lex_get().
Used only in exceptional circumstances. */
-
+
struct string put_tokstr;
double put_tokval;
};
static int parse_id (struct lexer *);
/* How a string represents its contents. */
-enum string_type
+enum string_type
{
CHARACTER_STRING, /* Characters. */
BINARY_STRING, /* Binary digits. */
void
lex_destroy (struct lexer *lexer)
{
- if ( NULL != lexer )
+ if ( NULL != lexer )
{
ds_destroy (&lexer->put_tokstr);
ds_destroy (&lexer->tokstr);
/* Copies put_token, lexer->put_tokstr, put_tokval into token, tokstr,
tokval, respectively, and sets tokid appropriately. */
static void
-restore_token (struct lexer *lexer)
+restore_token (struct lexer *lexer)
{
assert (lexer->put_token != 0);
lexer->token = lexer->put_token;
/* Copies token, tokstr, lexer->tokval into lexer->put_token, put_tokstr,
put_lexer->tokval respectively. */
static void
-save_token (struct lexer *lexer)
+save_token (struct lexer *lexer)
{
lexer->put_token = lexer->token;
ds_assign_string (&lexer->put_tokstr, &lexer->tokstr);
/* Actually parse the token. */
ds_clear (&lexer->tokstr);
-
+
switch (*lexer->prog)
{
case '-': case '.':
}
lexer->token = T_NEG_NUM;
}
- else
+ else
lexer->token = T_POS_NUM;
-
+
/* Parse the number, copying it into tokstr. */
while (isdigit ((unsigned char) *lexer->prog))
ds_put_char (&lexer->tokstr, *lexer->prog++);
else
lexer->token = parse_id (lexer);
break;
-
+
case 'o': case 'O':
if (lexer->prog[1] == '\'' || lexer->prog[1] == '"')
lexer->token = parse_string (lexer, OCTAL_STRING);
else
lexer->token = parse_id (lexer);
break;
-
+
case 'x': case 'X':
if (lexer->prog[1] == '\'' || lexer->prog[1] == '"')
lexer->token = parse_string (lexer, HEX_STRING);
else
lexer->token = parse_id (lexer);
break;
-
+
default:
- if (lex_is_id1 (*lexer->prog))
+ if (lex_is_id1 (*lexer->prog))
{
lexer->token = parse_id (lexer);
- break;
+ break;
}
else
{
msg (SE, _("Bad character in input: `%c'."), *lexer->prog++);
else
msg (SE, _("Bad character in input: `\\%o'."), *lexer->prog++);
- continue;
+ continue;
}
}
break;
tokstr.
Returns the correct token type. */
static int
-parse_id (struct lexer *lexer)
+parse_id (struct lexer *lexer)
{
struct substring rest_of_line
= ss_substr (ds_ss (&lexer->line_buffer),
/* Reports an error to the effect that subcommand SBC may only be
specified once. */
void
-lex_sbc_only_once (const char *sbc)
+lex_sbc_only_once (const char *sbc)
{
msg (SE, _("Subcommand %s may only be specified once."), sbc);
}
/* Reports an error to the effect that subcommand SBC is
missing. */
void
-lex_sbc_missing (struct lexer *lexer, const char *sbc)
+lex_sbc_missing (struct lexer *lexer, const char *sbc)
{
lex_error (lexer, _("missing required subcommand %s"), sbc);
}
{
char buf[1024];
va_list args;
-
+
va_start (args, message);
vsnprintf (buf, 1024, message, args);
va_end (args);
/* Returns true if the current token is a number. */
bool
-lex_is_number (struct lexer *lexer)
+lex_is_number (struct lexer *lexer)
{
return lexer->token == T_POS_NUM || lexer->token == T_NEG_NUM;
}
assert (lex_is_integer (lexer));
return lexer->tokval;
}
-\f
+\f
/* Token matching functions. */
/* If TOK is the current token, skips it and returns true
return false;
}
}
-
+
/* If this token is a number, does nothing and returns true.
Otherwise, reports an error and returns false. */
bool
lex_error (lexer, _("expecting number"));
return false;
}
-
+
/* If this token is an identifier, does nothing and returns true.
Otherwise, reports an error and returns false. */
bool
else if (!lex_get_line (lexer))
return 0;
- if (lexer->put_token)
+ if (lexer->put_token)
return lexer->put_token;
}
/* Returns true if the current line ends in a terminal dot,
false otherwise. */
bool
-lex_end_dot (const struct lexer *lexer)
+lex_end_dot (const struct lexer *lexer)
{
return lexer->dot;
}
the user doesn't want to finish typing a command that will be
ignored anyway. */
void
-lex_discard_rest_of_command (struct lexer *lexer)
+lex_discard_rest_of_command (struct lexer *lexer)
{
if (!getl_is_interactive (lexer->ss))
{
while (lexer->token != T_STOP && lexer->token != '.')
lex_get (lexer);
}
- else
- lex_discard_line (lexer);
+ else
+ lex_discard_line (lexer);
}
\f
/* Weird line reading functions. */
else if (*cp == '\'' || *cp == '"')
quote = *cp;
}
-
+
/* If we're not inside a quotation, check for comment. */
if (quote == EOF)
{
continue;
}
}
-
+
/* Check commenting. */
if (in_comment)
*cp = ' ';
{
int first = ds_first (line);
*line_starts_command = !isspace (first);
- if (first == '+' || first == '-')
+ if (first == '+' || first == '-')
*ds_data (line) = ' ';
}
}
/* Reads a line, without performing any preprocessing.
Sets *SYNTAX, if SYNTAX is non-null, to the line's syntax
mode. */
-bool
+bool
lex_get_line_raw (struct lexer *lexer, enum getl_syntax *syntax)
{
enum getl_syntax dummy;
lex_token_representation (struct lexer *lexer)
{
char *token_rep;
-
+
switch (lexer->token)
{
case T_ID:
hexstring = 1;
break;
}
-
+
token_rep = xmalloc (2 + ds_length (&lexer->tokstr) * 2 + 1 + 1);
dp = token_rep;
}
*dp++ = '\'';
*dp = '\0';
-
+
return token_rep;
}
break;
default:
return xstrdup (lex_token_name (lexer->token));
}
-
+
NOT_REACHED ();
}
\f
lexer->token = '-';
}
}
-
+
/* Skip a COMMENT command. */
void
lex_skip_comment (struct lexer *lexer)
{
for (;;)
{
- if (!lex_get_line (lexer))
+ if (!lex_get_line (lexer))
{
lexer->put_token = T_STOP;
lexer->prog = NULL;
return;
}
-
+
if (lexer->put_token == '.')
break;
hex digits, according to TYPE. The string is converted to
characters having the specified values. */
static void
-convert_numeric_string_to_char_string (struct lexer *lexer,
+convert_numeric_string_to_char_string (struct lexer *lexer,
enum string_type type)
{
const char *base_name;
size_t i;
char *p;
- switch (type)
+ switch (type)
{
case BINARY_STRING:
base_name = _("binary");
default:
NOT_REACHED ();
}
-
+
byte_cnt = ds_length (&lexer->tokstr) / chars_per_byte;
if (ds_length (&lexer->tokstr) % chars_per_byte)
msg (SE, _("String of %s digits has %d characters, which is not a "
{
int value;
int j;
-
+
value = 0;
for (j = 0; j < chars_per_byte; j++, p++)
{
buffer pointer lexer->prog must point to the initial single or double
quote. TYPE indicates the type of string to be parsed.
Returns token type. */
-static int
+static int
parse_string (struct lexer *lexer, enum string_type type)
{
if (type != CHARACTER_STRING)
{
/* Single or double quote. */
int c = *lexer->prog++;
-
+
/* Accumulate section. */
for (;;)
{
msg (SE, _("Unterminated string constant."));
goto finish;
}
-
+
/* Double quote characters to embed them in strings. */
if (*lexer->prog == c)
{
(int) ds_length (&lexer->tokstr));
ds_truncate (&lexer->tokstr, 255);
}
-
+
return T_STRING;
}
-\f
+\f
#if DUMP_TOKENS
/* Reads one token from the lexer and writes a textual representation
on stdout for debugging purposes. */
if (curfn)
fprintf (stderr, "%s:%d\t", curfn, curln);
}
-
+
switch (lexer->token)
{
case T_ID:
/* Token Accessor Functions */
-int
+int
lex_token (const struct lexer *lexer)
{
return lexer->token;
}
-double
+double
lex_tokval (const struct lexer *lexer)
{
return lexer->tokval;
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