X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;ds=sidebyside;f=token.c;h=7d2104cef8f2cad94f0c69ac0a77b9d63fbba399;hb=296ba6e16420b89723d1a5b1217d6ecfc2fb0c7d;hp=1fbaafd0410933055172733dd48c3096de58d2ab;hpb=2beaa4f65961fe297663e1cec9e5632b7f3e1cba;p=cparser

diff --git a/token.c b/token.c
index 1fbaafd..7d2104c 100644
--- a/token.c
+++ b/token.c
@@ -28,61 +28,53 @@
 #include "symbol.h"
 #include "lang_features.h"
 #include "adt/array.h"
+#include "adt/error.h"
+#include "adt/util.h"
 
-static symbol_t *token_symbols[T_LAST_TOKEN];
-static symbol_t *pp_token_symbols[TP_LAST_TOKEN];
+symbol_t *token_symbols[T_LAST_TOKEN];
 
-const source_position_t builtin_source_position = { "<built-in>", 0 };
+const source_position_t builtin_source_position = { "<built-in>", 0, 0, true };
 
-void init_tokens(void)
+static token_kind_t last_id;
+
+static symbol_t *intern_register_token(token_kind_t id, const char *string)
 {
-	symbol_t *symbol;
-	int       last_id = -2;
+	assert(id < T_LAST_TOKEN);
+	symbol_t *symbol = symbol_table_insert(string);
+	if (token_symbols[id] == NULL)
+		token_symbols[id] = symbol;
+	return symbol;
+}
 
-	memset(token_symbols, 0, T_LAST_TOKEN * sizeof(token_symbols[0]));
-	memset(pp_token_symbols, 0, TP_LAST_TOKEN * sizeof(pp_token_symbols[0]));
-
-#define T(mode,x,str,val)                                          \
-	if (T_##x > 255) {                                             \
-		assert(T_##x >= last_id);                                  \
-		last_id = T_##x;                                           \
-	}                                                              \
-	if (c_mode & (mode)) {                                         \
-		assert(T_##x >= 0 && T_##x < T_LAST_TOKEN);                \
-		symbol               = symbol_table_insert(str);           \
-		symbol->ID           = T_##x;                              \
-		if (token_symbols[T_##x] == NULL)                          \
-			token_symbols[T_##x] = symbol;                         \
+static void register_token(unsigned mode, token_kind_t id, const char *string)
+{
+	if (id > 255) {
+		assert(id >= last_id);
+		last_id = id;
+	}
+	if (c_mode & mode) {
+		symbol_t *symbol = intern_register_token(id, string);
+		symbol->ID = id;
 	}
+}
 
-#define TS(x,str,val)                                              \
-	assert(T_##x >= 0 && T_##x < T_LAST_TOKEN);                    \
-	symbol               = symbol_table_insert(str);               \
-	if (token_symbols[T_##x] == NULL)                              \
-		token_symbols[T_##x] = symbol;                             \
+static void register_pp_token(pp_token_kind_t const id, char const *const string)
+{
+	assert(id < TP_LAST_TOKEN);
+	symbol_t *const symbol = symbol_table_insert(string);
+	symbol->pp_ID = id;
+}
 
-#include "tokens.inc"
+void init_tokens(void)
+{
+	memset(token_symbols, 0, T_LAST_TOKEN * sizeof(token_symbols[0]));
 
-#undef TS
+#define T(mode,x,str,val)  register_token(mode, x, str);
+#include "tokens.inc"
 #undef T
 
-#define T(mode,x,str,val)                                          \
-	if (c_mode & (mode)) {                                         \
-		assert(TP_##x >= 0 && TP_##x < TP_LAST_TOKEN);             \
-		symbol                   = symbol_table_insert(str);       \
-		symbol->pp_ID            = TP_##x;                         \
-		if (pp_token_symbols[TP_##x] == NULL)                      \
-			pp_token_symbols[TP_##x] = symbol;                     \
-	}
-
-#define TS(x,str,val)                                              \
-	assert(TP_##x >= 0 && TP_##x < T_LAST_TOKEN);                  \
-	symbol                   = symbol_table_insert(str);           \
-	if (pp_token_symbols[TP_##x] == NULL)                          \
-		pp_token_symbols[TP_##x] = symbol;
-
+#define T(token) register_pp_token(TP_##token, #token);
 #include "tokens_preprocessor.inc"
-
 #undef T
 }
 
@@ -90,128 +82,89 @@ void exit_tokens(void)
 {
 }
 
-void print_token_type(FILE *f, token_type_t token_type)
+void print_token_kind(FILE *f, token_kind_t token_kind)
 {
-	if(token_type == T_EOF) {
-		fputs("end of file", f);
-		return;
-	}
-	if(token_type == T_ERROR) {
-		fputs("error", f);
-		return;
-	}
-
-	int token_symbols_len = T_LAST_TOKEN;
-	if(token_type < 0 || token_type >= token_symbols_len) {
+	if (token_kind >= lengthof(token_symbols)) {
 		fputs("invalid token", f);
 		return;
 	}
 
-	const symbol_t *symbol = token_symbols[token_type];
-	if(symbol != NULL) {
-		fputs(symbol->string, f);
-	} else {
-		if(token_type >= 0 && token_type < 256) {
-			fputc(token_type, f);
-			return;
-		}
-		fputs("unknown token", f);
-	}
-}
-
-symbol_t *get_token_symbol(const token_t *token)
-{
-	return token_symbols[token->type];
+	fputs(token_symbols[token_kind]->string, f);
 }
 
-static void print_stringrep(const string_t *string, FILE *f)
+char const *get_string_encoding_prefix(string_encoding_t const enc)
 {
-	for (size_t i = 0; i < string->size; ++i) {
-		fputc(string->begin[i], f);
+	switch (enc) {
+	case STRING_ENCODING_CHAR: return "";
+	case STRING_ENCODING_WIDE: return "L";
 	}
+	panic("invalid string encoding");
 }
 
 void print_token(FILE *f, const token_t *token)
 {
-	switch(token->type) {
+	char        delim = '\'';
+	char const *enc   = "";
+	char const *val;
+	switch (token->kind) {
 	case T_IDENTIFIER:
-		fprintf(f, "identifier '%s'", token->symbol->string);
+	case T_MACRO_PARAMETER:
+	case T_UNKNOWN_CHAR:
+		val = token->base.symbol->string;
 		break;
-	case T_INTEGER:
-	case T_INTEGER_OCTAL:
-	case T_INTEGER_HEXADECIMAL:
-	case T_FLOATINGPOINT:
-	case T_FLOATINGPOINT_HEXADECIMAL:
-		print_token_type(f, (token_type_t)token->type);
-		fputs(" '", f);
-		print_stringrep(&token->literal, f);
-		if (token->symbol != NULL)
-			fputs(token->symbol->string, f);
-		fputc('\'', f);
-		break;
-	case T_WIDE_STRING_LITERAL:
+
 	case T_STRING_LITERAL:
-		print_token_type(f, (token_type_t)token->type);
-		fprintf(f, " \"%s\"", token->literal.begin);
-		break;
+		delim = '"';
+		/* FALLTHROUGH */
 	case T_CHARACTER_CONSTANT:
-	case T_WIDE_CHARACTER_CONSTANT:
-		print_token_type(f, (token_type_t)token->type);
-		fputs(" \'", f);
-		print_stringrep(&token->literal, f);
-		fputs("'", f);
-		break;
-	default:
-		fputc('\'', f);
-		print_token_type(f, (token_type_t)token->type);
-		fputc('\'', f);
+		enc = get_string_encoding_prefix(token->literal.string.encoding);
+		/* FALLTHROUGH */
+	case T_NUMBER:
+		val = token->literal.string.begin;
 		break;
-	}
-}
 
-void print_pp_token_type(FILE *f, int token_type)
-{
-	if (token_type == TP_EOF) {
-		fputs("end of file", f);
+	default: {
+		char const *kind  = (token->base.symbol ? token->base.symbol : token_symbols[token->kind])->string;
+		fprintf(f, "'%s'", kind);
 		return;
 	}
-	if (token_type == TP_ERROR) {
-		fputs("error", f);
-		return;
-	}
-
-	int token_symbols_len = TP_LAST_TOKEN;
-	if (token_type < 0 || token_type >= token_symbols_len) {
-		fputs("invalid token", f);
-		return;
-	}
-
-	const symbol_t *symbol = pp_token_symbols[token_type];
-	if (symbol != NULL) {
-		fputs(symbol->string, f);
-	} else {
-		if(token_type >= 0 && token_type < 256) {
-			fputc(token_type, f);
-			return;
-		}
-		fputs("unknown token", f);
 	}
+	fprintf(f, "%s %s%c%s%c", token_symbols[token->kind]->string, enc, delim, val, delim);
 }
 
-void print_pp_token(FILE *f, const token_t *token)
+bool tokens_would_paste(token_kind_t token1, token_kind_t token2)
 {
-	switch((preprocessor_token_type_t) token->type) {
-	case TP_IDENTIFIER:
-		fprintf(f, "identifier '%s'", token->symbol->string);
-		break;
-	case TP_NUMBER:
-		fprintf(f, "number '%s'", token->literal.begin);
-		break;
-	case TP_STRING_LITERAL:
-		fprintf(f, "string \"%s\"", token->literal.begin);
-		break;
+	char const c = token_symbols[token2]->string[0];
+
+	switch (token1) {
+	case '>': return c == '>' || c == '=';
+	case '<': return c == '<' || c == '=' || c == '%' || c == ':';
+	case '+': return c == '+' || c == '=';
+	case '-': return c == '-' || c == '>';
+	case '/': return c == '/' || c == '=' || c == '*';
+	case '%': return c == ':' || c == '=' || c == '>';
+	case '&': return c == '&' || c == '=';
+	case '|': return c == '|' || c == '=';
+	case ':': return c == ':' || c == '>';
+	case '*': return c == '*' || c == '=';
+	case '.': return c == '.' || c == '%' || token2 == T_NUMBER;
+	case '#': return c == '#' || c == '%';
+	case T_GREATERGREATER: return c == '=';
+	case T_LESSLESS:       return c == '=';
+	case '^':              return c == '=';
+	case '!':              return c == '=';
+
+	case T_IDENTIFIER:
+		return token2 == T_CHARACTER_CONSTANT ||
+		       token2 == T_IDENTIFIER         ||
+		       token2 == T_NUMBER             ||
+		       token2 == T_STRING_LITERAL; /* L */
+
+	case T_NUMBER:
+		return token2 == T_IDENTIFIER || token2 == T_NUMBER ||
+		       token2 == '.' || token2 == '+' || token2 == '-';
+
 	default:
-		print_pp_token_type(f, (preprocessor_token_type_t) token->type);
-		break;
+		return false;
 	}
 }