#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>
#define strtold(s, e) strtod(s, e)
#endif
+#if defined HAS_SIGNED_CHAR
+typedef signed char char_type;
+#elif defined HAS_UNSIGNED_CHAR
+typedef unsigned char char_type;
+#else
+# error signedness of char not determined
+#endif
+
static int c;
token_t lexer_token;
symbol_t *symbol_L;
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 = 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;
}
symbol_t *symbol;
char *string;
- obstack_1grow(&symbol_obstack, c);
+ obstack_1grow(&symbol_obstack, (char) c);
next_char();
while(1) {
switch(c) {
DIGITS
SYMBOL_CHARS
- obstack_1grow(&symbol_obstack, c);
+ obstack_1grow(&symbol_obstack, (char) c);
next_char();
break;
}
}
-static void parse_integer_suffix(void)
+static void parse_integer_suffix(bool is_oct_hex)
{
+ bool is_unsigned = false;
+ bool min_long = false;
+ bool min_longlong = false;
+
if(c == 'U' || c == 'u') {
+ is_unsigned = true;
next_char();
if(c == 'L' || c == 'l') {
+ min_long = true;
next_char();
if(c == 'L' || c == 'l') {
+ min_longlong = true;
next_char();
- lexer_token.datatype = type_ulonglong;
- } else {
- lexer_token.datatype = type_ulong;
}
- } else {
- lexer_token.datatype = type_uint;
}
} else if(c == 'l' || c == 'L') {
+ min_long = true;
next_char();
if(c == 'l' || c == 'L') {
+ min_longlong = true;
next_char();
if(c == 'u' || c == 'U') {
+ is_unsigned = true;
next_char();
- lexer_token.datatype = type_ulonglong;
- } else {
- lexer_token.datatype = type_longlong;
}
} else if(c == 'u' || c == 'U') {
+ is_unsigned = true;
next_char();
- lexer_token.datatype = type_ulong;
- } else {
- lexer_token.datatype = type_int;
+ lexer_token.datatype = type_unsigned_long;
+ }
+ }
+
+ if(!is_unsigned) {
+ long long v = lexer_token.v.intvalue;
+ if(!min_long) {
+ if(v >= TARGET_INT_MIN && v <= TARGET_INT_MAX) {
+ lexer_token.datatype = type_int;
+ return;
+ } else if(is_oct_hex && v >= 0 && v <= TARGET_UINT_MAX) {
+ lexer_token.datatype = type_unsigned_int;
+ return;
+ }
+ }
+ if(!min_longlong) {
+ if(v >= TARGET_LONG_MIN && v <= TARGET_LONG_MAX) {
+ lexer_token.datatype = type_long;
+ return;
+ } else if(is_oct_hex && v >= 0 && v <= TARGET_ULONG_MAX) {
+ 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_unsigned_long_long;
+ return;
}
+
+ lexer_token.datatype = type_long_long;
} else {
- lexer_token.datatype = type_int;
+ unsigned long long v = (unsigned long long) lexer_token.v.intvalue;
+ if(!min_long && v <= TARGET_UINT_MAX) {
+ lexer_token.datatype = type_unsigned_int;
+ return;
+ }
+ if(!min_longlong && v <= TARGET_ULONG_MAX) {
+ lexer_token.datatype = type_unsigned_long;
+ return;
+ }
+ 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;
case 16:
for (;; ++s) {
/* check for overrun */
- if (v <= 0x1000000000000000ULL)
+ if (v >= 0x1000000000000000ULL)
break;
switch (tolower(*s)) {
case '0': v <<= 4; break;
case 8:
for (;; ++s) {
/* check for overrun */
- if (v <= 0x2000000000000000ULL)
+ if (v >= 0x2000000000000000ULL)
break;
switch (tolower(*s)) {
case '0': v <<= 3; break;
next_char();
while(isxdigit(c)) {
- obstack_1grow(&symbol_obstack, c);
+ obstack_1grow(&symbol_obstack, (char) c);
next_char();
}
obstack_1grow(&symbol_obstack, '\0');
}
obstack_free(&symbol_obstack, string);
- parse_integer_suffix();
+ parse_integer_suffix(true);
}
static inline bool is_octal_digit(int chr)
static void parse_number_oct(void)
{
while(is_octal_digit(c)) {
- obstack_1grow(&symbol_obstack, c);
+ obstack_1grow(&symbol_obstack, (char) c);
next_char();
}
obstack_1grow(&symbol_obstack, '\0');
}
obstack_free(&symbol_obstack, string);
- parse_integer_suffix();
+ parse_integer_suffix(true);
}
static void parse_number_dec(void)
{
bool is_float = false;
while(isdigit(c)) {
- obstack_1grow(&symbol_obstack, c);
+ obstack_1grow(&symbol_obstack, (char) c);
next_char();
}
next_char();
while(isdigit(c)) {
- obstack_1grow(&symbol_obstack, c);
+ obstack_1grow(&symbol_obstack, (char) c);
next_char();
}
is_float = true;
next_char();
if(c == '-' || c == '+') {
- obstack_1grow(&symbol_obstack, c);
+ obstack_1grow(&symbol_obstack, (char) c);
next_char();
}
while(isdigit(c)) {
- obstack_1grow(&symbol_obstack, c);
+ obstack_1grow(&symbol_obstack, (char) c);
next_char();
}
is_float = true;
parse_error("invalid number literal");
}
- parse_integer_suffix();
+ parse_integer_suffix(false);
}
obstack_free(&symbol_obstack, string);
}
if (!is_octal_digit(c)) return value;
value = 8 * value + c - '0';
next_char();
- return value;
+ return (char_type)value;
}
static int parse_hex_sequence(void)
next_char();
}
- return value;
+ return (char_type)value;
}
static int parse_escape_sequence(void)
}
}
-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();
switch(c) {
case '\\':
tc = parse_escape_sequence();
- obstack_1grow(&symbol_obstack, tc);
+ obstack_1grow(&symbol_obstack, (char) tc);
break;
case EOF:
goto end_of_string;
default:
- obstack_1grow(&symbol_obstack, c);
+ obstack_1grow(&symbol_obstack, (char) c);
next_char();
break;
}
/* 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.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)
+{
+ const unsigned start_linenr = lexer_token.source_position.linenr;
+
+ assert(c == '"');
+ next_char();
+
+ while(1) {
+ switch(c) {
+ case '\\': {
+ wchar_rep_t tc = parse_escape_sequence();
+ obstack_grow(&symbol_obstack, &tc, sizeof(tc));
+ break;
+ }
+
+ case EOF:
+ error_prefix_at(lexer_token.source_position.input_name,
+ start_linenr);
+ fprintf(stderr, "string has no end\n");
+ lexer_token.type = T_ERROR;
+ return;
+
+ case '"':
+ next_char();
+ goto end_of_string;
+
+ default: {
+ wchar_rep_t tc = c;
+ obstack_grow(&symbol_obstack, &tc, sizeof(tc));
+ next_char();
+ break;
+ }
+ }
+ }
+
+end_of_string:;
+
+ /* TODO: concatenate multiple strings separated by whitespace... */
+
+ /* add finishing 0 to the string */
+ wchar_rep_t nul = L'\0';
+ obstack_grow(&symbol_obstack, &nul, sizeof(nul));
+ const size_t size = (size_t)obstack_object_size(&symbol_obstack) / sizeof(wchar_rep_t);
+ const wchar_rep_t *const string = obstack_finish(&symbol_obstack);
+
+#if 0 /* TODO hash */
+ /* check if there is already a copy of the string */
+ const wchar_rep_t *const result = strset_insert(&stringset, string);
+ if(result != string) {
+ obstack_free(&symbol_obstack, string);
+ }
+#else
+ const wchar_rep_t *const result = string;
+#endif
- lexer_token.type = T_STRING_LITERAL;
- lexer_token.v.string = result;
+ lexer_token.type = T_WIDE_STRING_LITERAL;
+ lexer_token.v.wide_string.begin = result;
+ lexer_token.v.wide_string.size = size;
}
static void parse_character_constant(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_string_literal();
- return;
+ 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_CONST);
- type_uint = make_atomic_type(ATOMIC_TYPE_UINT, TYPE_QUALIFIER_CONST);
- type_long = make_atomic_type(ATOMIC_TYPE_LONG, TYPE_QUALIFIER_CONST);
- type_ulong = make_atomic_type(ATOMIC_TYPE_ULONG, TYPE_QUALIFIER_CONST);
- type_longlong = make_atomic_type(ATOMIC_TYPE_LONGLONG,
- TYPE_QUALIFIER_CONST);
- type_ulonglong = make_atomic_type(ATOMIC_TYPE_ULONGLONG,
- TYPE_QUALIFIER_CONST);
-
- 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 */
static __attribute__((unused))
void dbg_pos(const source_position_t source_position)
{
- fprintf(stdout, "%s:%d\n", source_position.input_name,
+ fprintf(stdout, "%s:%u\n", source_position.input_name,
source_position.linenr);
fflush(stdout);
}
projects / cparser / blobdiff