#include <config.h>
+#include "diagnostic.h"
#include "lexer.h"
#include "token_t.h"
#include "symbol_table_t.h"
#include "adt/error.h"
#include "adt/strset.h"
#include "adt/util.h"
+#include "types.h"
#include "type_t.h"
#include "target_architecture.h"
+#include "parser.h"
+#include "warning.h"
#include <assert.h>
#include <errno.h>
static const char *bufpos;
static strset_t stringset;
-static type_t *type_int = NULL;
-static type_t *type_uint = NULL;
-static type_t *type_long = NULL;
-static type_t *type_ulong = NULL;
-static type_t *type_longlong = NULL;
-static type_t *type_ulonglong = NULL;
-static type_t *type_float = NULL;
-static type_t *type_double = NULL;
-static type_t *type_longdouble = NULL;
-
static void error_prefix_at(const char *input_name, unsigned linenr)
{
fprintf(stderr, "%s:%u: Error: ", input_name, linenr);
static inline void next_real_char(void)
{
- bufpos++;
- if(bufpos >= bufend) {
+ assert(bufpos <= bufend);
+ if (bufpos >= bufend) {
size_t s = fread(buf + MAX_PUTBACK, 1, sizeof(buf) - MAX_PUTBACK,
input);
if(s == 0) {
bufpos = buf + MAX_PUTBACK;
bufend = buf + MAX_PUTBACK + s;
}
- c = *(bufpos);
+ c = *bufpos++;
}
static inline void put_back(int pc)
{
- assert(bufpos >= buf);
- //assert(bufpos < buf+MAX_PUTBACK || *bufpos == pc);
-
- char *p = buf + (bufpos - buf);
- *p = (char) pc;
-
- /* going backwards in the buffer is legal as long as it's not more often
- * than MAX_PUTBACK */
- bufpos--;
+ assert(bufpos > buf);
+ *(--bufpos - buf + buf) = (char) pc;
#ifdef DEBUG_CHARS
printf("putback '%c'\n", pc);
next_char(); \
} \
lexer_token.source_position.linenr++; \
- code; \
+ code \
case '\n': \
next_char(); \
lexer_token.source_position.linenr++; \
- code;
+ code
#define eat(c_type) do { assert(c == c_type); next_char(); } while(0)
case '>': c = '}'; break;
case '-': c = '~'; break;
default:
- put_back('?');
put_back(c);
+ put_back('?');
c = '?';
break;
}
} else if(c == 'u' || c == 'U') {
is_unsigned = true;
next_char();
- lexer_token.datatype = type_ulong;
+ lexer_token.datatype = type_unsigned_long;
}
}
lexer_token.datatype = type_int;
return;
} else if(is_oct_hex && v >= 0 && v <= TARGET_UINT_MAX) {
- lexer_token.datatype = type_uint;
+ lexer_token.datatype = type_unsigned_int;
return;
}
}
lexer_token.datatype = type_long;
return;
} else if(is_oct_hex && v >= 0 && v <= TARGET_ULONG_MAX) {
- lexer_token.datatype = type_ulong;
+ lexer_token.datatype = type_unsigned_long;
return;
}
}
unsigned long long uv = (unsigned long long) v;
if(is_oct_hex && uv > (unsigned long long) TARGET_LONGLONG_MAX) {
- lexer_token.datatype = type_ulonglong;
+ lexer_token.datatype = type_unsigned_long_long;
return;
}
- lexer_token.datatype = type_longlong;
+ lexer_token.datatype = type_long_long;
} else {
unsigned long long v = (unsigned long long) lexer_token.v.intvalue;
if(!min_long && v <= TARGET_UINT_MAX) {
- lexer_token.datatype = type_uint;
+ lexer_token.datatype = type_unsigned_int;
return;
}
if(!min_longlong && v <= TARGET_ULONG_MAX) {
- lexer_token.datatype = type_ulong;
+ lexer_token.datatype = type_unsigned_long;
return;
}
- lexer_token.datatype = type_ulonglong;
+ lexer_token.datatype = type_unsigned_long_long;
}
}
case 'l':
case 'L':
next_char();
- lexer_token.datatype = type_longdouble;
+ lexer_token.datatype = type_long_double;
break;
default:
lexer_token.datatype = type_double;
}
}
-const char *concat_strings(const char *s1, const char *s2)
+string_t concat_strings(const string_t *const s1, const string_t *const s2)
{
- size_t len1 = strlen(s1);
- size_t len2 = strlen(s2);
+ const size_t len1 = s1->size - 1;
+ const size_t len2 = s2->size - 1;
- char *concat = obstack_alloc(&symbol_obstack, len1 + len2 + 1);
- memcpy(concat, s1, len1);
- memcpy(concat + len1, s2, len2 + 1);
+ char *const concat = obstack_alloc(&symbol_obstack, len1 + len2 + 1);
+ memcpy(concat, s1->begin, len1);
+ memcpy(concat + len1, s2->begin, len2 + 1);
+#if 0 /* TODO hash */
const char *result = strset_insert(&stringset, concat);
if(result != concat) {
obstack_free(&symbol_obstack, concat);
}
return result;
+#else
+ return (string_t){ concat, len1 + len2 + 1 };
+#endif
}
static void parse_string_literal(void)
{
- unsigned start_linenr = lexer_token.source_position.linenr;
- char *string;
- const char *result;
+ const unsigned start_linenr = lexer_token.source_position.linenr;
assert(c == '"');
next_char();
/* add finishing 0 to the string */
obstack_1grow(&symbol_obstack, '\0');
- string = obstack_finish(&symbol_obstack);
+ const size_t size = (size_t)obstack_object_size(&symbol_obstack);
+ const char *const string = obstack_finish(&symbol_obstack);
+#if 0 /* TODO hash */
/* check if there is already a copy of the string */
result = strset_insert(&stringset, string);
if(result != string) {
obstack_free(&symbol_obstack, string);
}
+#else
+ const char *const result = string;
+#endif
- lexer_token.type = T_STRING_LITERAL;
- lexer_token.v.string = result;
+ lexer_token.type = T_STRING_LITERAL;
+ lexer_token.v.string.begin = result;
+ lexer_token.v.string.size = size;
+}
+
+static void parse_wide_character_constant(void)
+{
+ eat('\'');
+
+ int found_char = 0;
+ while(1) {
+ switch(c) {
+ case '\\':
+ found_char = parse_escape_sequence();
+ break;
+
+ MATCH_NEWLINE(
+ parse_error("newline while parsing character constant");
+ break;
+ )
+
+ case '\'':
+ next_char();
+ goto end_of_wide_char_constant;
+
+ case EOF:
+ parse_error("EOF while parsing character constant");
+ lexer_token.type = T_ERROR;
+ return;
+
+ default:
+ if(found_char != 0) {
+ parse_error("more than 1 characters in character "
+ "constant");
+ goto end_of_wide_char_constant;
+ } else {
+ found_char = c;
+ next_char();
+ }
+ break;
+ }
+ }
+
+end_of_wide_char_constant:
+ lexer_token.type = T_INTEGER;
+ lexer_token.v.intvalue = found_char;
+ lexer_token.datatype = type_wchar_t;
}
static void parse_wide_string_literal(void)
end_of_char_constant:
lexer_token.type = T_INTEGER;
lexer_token.v.intvalue = found_char;
+ lexer_token.datatype = type_int;
}
static void skip_multiline_comment(void)
next_pp_token();
}
if(pp_token.type == T_STRING_LITERAL) {
- lexer_token.source_position.input_name = pp_token.v.string;
+ lexer_token.source_position.input_name = pp_token.v.string.begin;
next_pp_token();
}
error_directive();
break;
case TP_pragma:
+ if (warning.unknown_pragmas) {
+ warningf(lexer_token.source_position, "encountered unknown #pragma");
+ }
+ eat_until_newline();
break;
}
}
SYMBOL_CHARS
parse_symbol();
/* might be a wide string ( L"string" ) */
- if(c == '"' && (lexer_token.type == T_IDENTIFIER &&
- lexer_token.v.symbol == symbol_L)) {
- parse_wide_string_literal();
+ if(lexer_token.type == T_IDENTIFIER &&
+ lexer_token.v.symbol == symbol_L) {
+ if(c == '"') {
+ parse_wide_string_literal();
+ } else if(c == '\'') {
+ parse_wide_character_constant();
+ }
}
return;
case '.':
MAYBE_PROLOG
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ put_back(c);
+ c = '.';
+ parse_number_dec();
+ return;
+
case '.':
MAYBE_PROLOG
MAYBE('.', T_DOTDOTDOT)
void init_lexer(void)
{
strset_init(&stringset);
-
- type_int = make_atomic_type(ATOMIC_TYPE_INT, TYPE_QUALIFIER_NONE);
- type_uint = make_atomic_type(ATOMIC_TYPE_UINT, TYPE_QUALIFIER_NONE);
- type_long = make_atomic_type(ATOMIC_TYPE_LONG, TYPE_QUALIFIER_NONE);
- type_ulong = make_atomic_type(ATOMIC_TYPE_ULONG, TYPE_QUALIFIER_NONE);
- type_longlong = make_atomic_type(ATOMIC_TYPE_LONGLONG,
- TYPE_QUALIFIER_NONE);
- type_ulonglong = make_atomic_type(ATOMIC_TYPE_ULONGLONG,
- TYPE_QUALIFIER_NONE);
-
- type_float = make_atomic_type(ATOMIC_TYPE_FLOAT, TYPE_QUALIFIER_CONST);
- type_double = make_atomic_type(ATOMIC_TYPE_DOUBLE,
- TYPE_QUALIFIER_CONST);
- type_longdouble = make_atomic_type(ATOMIC_TYPE_LONG_DOUBLE,
- TYPE_QUALIFIER_CONST);
}
void lexer_open_stream(FILE *stream, const char *input_name)
lexer_token.source_position.input_name = input_name;
symbol_L = symbol_table_insert("L");
+ bufpos = NULL;
+ bufend = NULL;
/* place a virtual \n at the beginning so the lexer knows that we're
* at the beginning of a line */
projects / cparser / blobdiff