#include "lexer.h"
typedef struct {
- bool on;
- bool was_on;
- bool had_else;
+ bool on;
+ bool was_on;
+ bool had_else;
} ppcondition;
typedef struct {
- int token;
- char *value;
+ int token;
+ char *value;
+ /* a copy from the lexer */
+ union {
+ vector v;
+ int i;
+ double f;
+ int t; /* type */
+ } constval;
} pptoken;
typedef struct {
- lex_ctx ctx;
+ lex_ctx ctx;
- char *name;
- char **params;
- /* yes we need an extra flag since `#define FOO x` is not the same as `#define FOO() x` */
- bool has_params;
+ char *name;
+ char **params;
+ /* yes we need an extra flag since `#define FOO x` is not the same as `#define FOO() x` */
+ bool has_params;
- pptoken *output;
+ pptoken **output;
} ppmacro;
typedef struct {
- lex_file *lex;
- int token;
- bool newline;
- unsigned int errors;
+ lex_file *lex;
+ int token;
+ bool newline;
+ unsigned int errors;
- ppcondition *conditions;
- ppmacro **macros;
+ ppcondition *conditions;
+ ppmacro **macros;
} ftepp_t;
#define ftepp_tokval(f) ((f)->lex->tok.value)
static void ftepp_errorat(ftepp_t *ftepp, lex_ctx ctx, const char *fmt, ...)
{
- va_list ap;
+ va_list ap;
- ftepp->errors++;
+ ftepp->errors++;
- va_start(ap, fmt);
+ va_start(ap, fmt);
con_vprintmsg(LVL_ERROR, ctx.file, ctx.line, "error", fmt, ap);
- va_end(ap);
+ va_end(ap);
}
static void ftepp_error(ftepp_t *ftepp, const char *fmt, ...)
{
- va_list ap;
+ va_list ap;
- ftepp->errors++;
+ ftepp->errors++;
- va_start(ap, fmt);
+ va_start(ap, fmt);
con_vprintmsg(LVL_ERROR, ftepp->lex->tok.ctx.file, ftepp->lex->tok.ctx.line, "error", fmt, ap);
- va_end(ap);
+ va_end(ap);
+}
+
+pptoken *pptoken_make(ftepp_t *ftepp)
+{
+ pptoken *token = (pptoken*)mem_a(sizeof(pptoken));
+ token->token = ftepp->token;
+ if (token->token == TOKEN_WHITE)
+ token->value = util_strdup(" ");
+ else
+ token->value = util_strdup(ftepp_tokval(ftepp));
+ memcpy(&token->constval, &ftepp->lex->tok.constval, sizeof(token->constval));
+ return token;
+}
+
+void pptoken_delete(pptoken *self)
+{
+ mem_d(self->value);
+ mem_d(self);
}
ppmacro *ppmacro_new(lex_ctx ctx, const char *name)
{
- ppmacro *macro = (ppmacro*)mem_a(sizeof(ppmacro));
- memset(macro, 0, sizeof(*macro));
- macro->name = util_strdup(name);
- return macro;
+ ppmacro *macro = (ppmacro*)mem_a(sizeof(ppmacro));
+ memset(macro, 0, sizeof(*macro));
+ macro->name = util_strdup(name);
+ return macro;
}
void ppmacro_delete(ppmacro *self)
{
- vec_free(self->params);
- vec_free(self->output);
- mem_d(self->name);
- mem_d(self);
+ size_t i;
+ for (i = 0; i < vec_size(self->params); ++i)
+ mem_d(self->params[i]);
+ vec_free(self->params);
+ for (i = 0; i < vec_size(self->output); ++i)
+ pptoken_delete(self->output[i]);
+ vec_free(self->output);
+ mem_d(self->name);
+ mem_d(self);
}
ftepp_t* ftepp_init()
{
- ftepp_t *ftepp;
+ ftepp_t *ftepp;
- ftepp = (ftepp_t*)mem_a(sizeof(*ftepp));
- memset(ftepp, 0, sizeof(*ftepp));
+ ftepp = (ftepp_t*)mem_a(sizeof(*ftepp));
+ memset(ftepp, 0, sizeof(*ftepp));
- return ftepp;
+ return ftepp;
}
void ftepp_delete(ftepp_t *self)
{
- vec_free(self->macros);
- vec_free(self->conditions);
- mem_d(self);
+ size_t i;
+ for (i = 0; i < vec_size(self->macros); ++i)
+ ppmacro_delete(self->macros[i]);
+ vec_free(self->macros);
+ vec_free(self->conditions);
+ lex_close(self->lex);
+ mem_d(self);
+}
+
+static void ftepp_out(ftepp_t *ftepp, const char *str, bool ignore_cond)
+{
+ if (ignore_cond ||
+ !vec_size(ftepp->conditions) ||
+ vec_last(ftepp->conditions).on)
+ {
+ printf("%s", str);
+ }
}
ppmacro* ftepp_macro_find(ftepp_t *ftepp, const char *name)
{
- size_t i;
- for (i = 0; i < vec_size(ftepp->macros); ++i) {
- if (!strcmp(name, ftepp->macros[i]->name))
- return ftepp->macros[i];
- }
- return NULL;
+ size_t i;
+ for (i = 0; i < vec_size(ftepp->macros); ++i) {
+ if (!strcmp(name, ftepp->macros[i]->name))
+ return ftepp->macros[i];
+ }
+ return NULL;
}
static inline int ftepp_next(ftepp_t *ftepp)
{
- return (ftepp->token = lex_do(ftepp->lex));
+ return (ftepp->token = lex_do(ftepp->lex));
}
/* Important: this does not skip newlines! */
static bool ftepp_skipspace(ftepp_t *ftepp)
{
- if (ftepp->token != TOKEN_WHITE)
- return true;
- while (ftepp_next(ftepp) == TOKEN_WHITE) {}
- return (ftepp->token < TOKEN_EOF);
+ if (ftepp->token != TOKEN_WHITE)
+ return true;
+ while (ftepp_next(ftepp) == TOKEN_WHITE) {}
+ if (ftepp->token >= TOKEN_EOF) {
+ ftepp_error(ftepp, "unexpected end of preprocessor directive");
+ return false;
+ }
+ return true;
}
-/* if/ifdef/define handlers */
+/* this one skips EOLs as well */
+static bool ftepp_skipallwhite(ftepp_t *ftepp)
+{
+ if (ftepp->token != TOKEN_WHITE && ftepp->token != TOKEN_EOL)
+ return true;
+ do {
+ ftepp_next(ftepp);
+ } while (ftepp->token == TOKEN_WHITE || ftepp->token == TOKEN_EOL);
+ if (ftepp->token >= TOKEN_EOF) {
+ ftepp_error(ftepp, "unexpected end of preprocessor directive");
+ return false;
+ }
+ return true;
+}
-static bool ftepp_if(ftepp_t *ftepp, ppcondition *cond)
+/**
+ * The huge macro parsing code...
+ */
+static bool ftepp_define_params(ftepp_t *ftepp, ppmacro *macro)
{
- ftepp_error(ftepp, "TODO: #if");
- return false;
+ do {
+ ftepp_next(ftepp);
+ if (!ftepp_skipspace(ftepp))
+ return false;
+ if (ftepp->token == ')')
+ break;
+ switch (ftepp->token) {
+ case TOKEN_IDENT:
+ case TOKEN_TYPENAME:
+ case TOKEN_KEYWORD:
+ break;
+ default:
+ ftepp_error(ftepp, "unexpected token in parameter list");
+ return false;
+ }
+ vec_push(macro->params, util_strdup(ftepp_tokval(ftepp)));
+ ftepp_next(ftepp);
+ if (!ftepp_skipspace(ftepp))
+ return false;
+ } while (ftepp->token == ',');
+ if (ftepp->token != ')') {
+ ftepp_error(ftepp, "expected closing paren after macro parameter list");
+ return false;
+ }
+ ftepp_next(ftepp);
+ /* skipspace happens in ftepp_define */
+ return true;
}
-static bool ftepp_ifdef(ftepp_t *ftepp, ppcondition *cond)
+static bool ftepp_define_body(ftepp_t *ftepp, ppmacro *macro)
{
- ppmacro *macro;
- (void)ftepp_next(ftepp);
- if (!ftepp_skipspace(ftepp))
- return false;
-
- switch (ftepp->token) {
- case TOKEN_IDENT:
- case TOKEN_KEYWORD:
- macro = ftepp_macro_find(ftepp, ftepp_tokval(ftepp));
- break;
- default:
- ftepp_error(ftepp, "expected macro name");
- return false;
- }
-
- (void)ftepp_next(ftepp);
- if (!ftepp_skipspace(ftepp))
- return false;
- if (ftepp->token != TOKEN_EOL) {
- ftepp_error(ftepp, "stray tokens after #ifdef");
- return false;
- }
- cond->on = !!macro;
- return true;
+ pptoken *ptok;
+ while (ftepp->token != TOKEN_EOL && ftepp->token < TOKEN_EOF) {
+ ptok = pptoken_make(ftepp);
+ vec_push(macro->output, ptok);
+ ftepp_next(ftepp);
+ }
+ if (ftepp->token != TOKEN_EOL) {
+ ftepp_error(ftepp, "unexpected junk after macro or unexpected end of file");
+ return false;
+ }
+ return true;
}
static bool ftepp_define(ftepp_t *ftepp)
{
- ppmacro *macro;
- (void)ftepp_next(ftepp);
- if (!ftepp_skipspace(ftepp))
- return false;
-
- switch (ftepp->token) {
- case TOKEN_IDENT:
- case TOKEN_KEYWORD:
- macro = ppmacro_new(ftepp_ctx(ftepp), ftepp_tokval(ftepp));
- break;
- default:
- ftepp_error(ftepp, "expected macro name");
- return false;
- }
-
- (void)ftepp_next(ftepp);
- if (!ftepp_skipspace(ftepp))
- return false;
- if (ftepp->token != TOKEN_EOL) {
- ftepp_error(ftepp, "stray tokens after macro");
- return false;
- }
- vec_push(ftepp->macros, macro);
- return true;
+ ppmacro *macro;
+ (void)ftepp_next(ftepp);
+ if (!ftepp_skipspace(ftepp))
+ return false;
+
+ switch (ftepp->token) {
+ case TOKEN_IDENT:
+ case TOKEN_TYPENAME:
+ case TOKEN_KEYWORD:
+ macro = ppmacro_new(ftepp_ctx(ftepp), ftepp_tokval(ftepp));
+ break;
+ default:
+ ftepp_error(ftepp, "expected macro name");
+ return false;
+ }
+
+ (void)ftepp_next(ftepp);
+
+ if (ftepp->token == '(') {
+ macro->has_params = true;
+ if (!ftepp_define_params(ftepp, macro))
+ return false;
+ }
+
+ if (!ftepp_skipspace(ftepp))
+ return false;
+
+ if (!ftepp_define_body(ftepp, macro))
+ return false;
+
+ vec_push(ftepp->macros, macro);
+ return true;
+}
+
+static bool ftepp_macro_call(ftepp_t *ftepp, ppmacro *macro)
+{
+ size_t o;
+ ftepp_next(ftepp);
+
+ if (!macro->has_params) {
+ for (o = 0; o < vec_size(macro->output); ++o) {
+ ftepp_out(ftepp, macro->output[o]->value, false);
+ }
+ return true;
+ }
+
+ if (!ftepp_skipallwhite(ftepp))
+ return false;
+ return true;
+}
+
+/**
+ * When a macro is used we have to handle parameters as well
+ * as special-concatenation via ## or stringification via #
+ */
+
+/**
+ * #if - the FTEQCC way:
+ * defined(FOO) => true if FOO was #defined regardless of parameters or contents
+ * <numbers> => True if the number is not 0
+ * !<factor> => True if the factor yields false
+ * !!<factor> => ERROR on 2 or more unary nots
+ * <macro> => becomes the macro's FIRST token regardless of parameters
+ * <e> && <e> => True if both expressions are true
+ * <e> || <e> => True if either expression is true
+ * <string> => False
+ * <ident> => False (remember for macros the <macro> rule applies instead)
+ * Unary + and - are weird and wrong in fteqcc so we don't allow them
+ * parenthesis in expressions are allowed
+ * parameter lists on macros are errors
+ * No mathematical calculations are executed
+ */
+static bool ftepp_if_expr(ftepp_t *ftepp, bool *out)
+{
+ ppmacro *macro;
+ bool wasnot = false;
+
+ if (!ftepp_skipspace(ftepp))
+ return false;
+
+ while (ftepp->token == '!') {
+ wasnot = true;
+ ftepp_next(ftepp);
+ if (!ftepp_skipspace(ftepp))
+ return false;
+ }
+
+ switch (ftepp->token) {
+ case TOKEN_IDENT:
+ case TOKEN_TYPENAME:
+ case TOKEN_KEYWORD:
+ if (!strcmp(ftepp_tokval(ftepp), "defined")) {
+ ftepp_next(ftepp);
+ if (!ftepp_skipspace(ftepp))
+ return false;
+ if (ftepp->token != '(') {
+ ftepp_error(ftepp, "`defined` keyword in #if requires a macro name in parenthesis");
+ return false;
+ }
+ ftepp_next(ftepp);
+ if (!ftepp_skipspace(ftepp))
+ return false;
+ if (ftepp->token != TOKEN_IDENT &&
+ ftepp->token != TOKEN_TYPENAME &&
+ ftepp->token != TOKEN_KEYWORD)
+ {
+ ftepp_error(ftepp, "defined() used on an unexpected token type");
+ return false;
+ }
+ macro = ftepp_macro_find(ftepp, ftepp_tokval(ftepp));
+ *out = !!macro;
+ ftepp_next(ftepp);
+ if (!ftepp_skipspace(ftepp))
+ return false;
+ if (ftepp->token != ')') {
+ ftepp_error(ftepp, "expected closing paren");
+ return false;
+ }
+ break;
+ }
+
+ macro = ftepp_macro_find(ftepp, ftepp_tokval(ftepp));
+ if (!macro || !vec_size(macro->output)) {
+ *out = false;
+ } else {
+ /* This does not expand recursively! */
+ switch (macro->output[0]->token) {
+ case TOKEN_INTCONST:
+ *out = !!(macro->output[0]->constval.f);
+ break;
+ case TOKEN_FLOATCONST:
+ *out = !!(macro->output[0]->constval.f);
+ break;
+ default:
+ *out = false;
+ break;
+ }
+ }
+ break;
+ case TOKEN_STRINGCONST:
+ *out = false;
+ break;
+ case TOKEN_INTCONST:
+ *out = !!(ftepp->lex->tok.constval.i);
+ break;
+ case TOKEN_FLOATCONST:
+ *out = !!(ftepp->lex->tok.constval.f);
+ break;
+
+ case '(':
+ ftepp_next(ftepp);
+ if (!ftepp_if_expr(ftepp, out))
+ return false;
+ if (ftepp->token != ')') {
+ ftepp_error(ftepp, "expected closing paren in #if expression");
+ return false;
+ }
+ break;
+
+ default:
+ ftepp_error(ftepp, "junk in #if");
+ return false;
+ }
+ if (wasnot)
+ *out = !*out;
+
+ ftepp->lex->flags.noops = false;
+ ftepp_next(ftepp);
+ if (!ftepp_skipspace(ftepp))
+ return false;
+ ftepp->lex->flags.noops = true;
+
+ if (ftepp->token == ')')
+ return true;
+
+ if (ftepp->token != TOKEN_OPERATOR)
+ return true;
+
+ if (!strcmp(ftepp_tokval(ftepp), "&&") ||
+ !strcmp(ftepp_tokval(ftepp), "||"))
+ {
+ bool next = false;
+ char opc = ftepp_tokval(ftepp)[0];
+
+ ftepp_next(ftepp);
+ if (!ftepp_if_expr(ftepp, &next))
+ return false;
+
+ if (opc == '&')
+ *out = *out && next;
+ else
+ *out = *out || next;
+ return true;
+ }
+ else {
+ ftepp_error(ftepp, "junk after #if");
+ return false;
+ }
+}
+
+static bool ftepp_if(ftepp_t *ftepp, ppcondition *cond)
+{
+ bool result = false;
+
+ memset(cond, 0, sizeof(*cond));
+ (void)ftepp_next(ftepp);
+
+ if (!ftepp_skipspace(ftepp))
+ return false;
+ if (ftepp->token == TOKEN_EOL) {
+ ftepp_error(ftepp, "expected expression for #if-directive");
+ return false;
+ }
+
+ if (!ftepp_if_expr(ftepp, &result))
+ return false;
+
+ cond->on = result;
+ return true;
+}
+
+/**
+ * ifdef is rather simple
+ */
+static bool ftepp_ifdef(ftepp_t *ftepp, ppcondition *cond)
+{
+ ppmacro *macro;
+ memset(cond, 0, sizeof(*cond));
+ (void)ftepp_next(ftepp);
+ if (!ftepp_skipspace(ftepp))
+ return false;
+
+ switch (ftepp->token) {
+ case TOKEN_IDENT:
+ case TOKEN_TYPENAME:
+ case TOKEN_KEYWORD:
+ macro = ftepp_macro_find(ftepp, ftepp_tokval(ftepp));
+ break;
+ default:
+ ftepp_error(ftepp, "expected macro name");
+ return false;
+ }
+
+ (void)ftepp_next(ftepp);
+ if (!ftepp_skipspace(ftepp))
+ return false;
+ if (ftepp->token != TOKEN_EOL) {
+ ftepp_error(ftepp, "stray tokens after #ifdef");
+ return false;
+ }
+ cond->on = !!macro;
+ return true;
}
/* Basic structure handlers */
static bool ftepp_else_allowed(ftepp_t *ftepp)
{
- if (!vec_size(ftepp->conditions)) {
- ftepp_error(ftepp, "#else without #if");
- return false;
- }
- if (vec_last(ftepp->conditions).had_else) {
- ftepp_error(ftepp, "multiple #else for a single #if");
- return false;
- }
- return true;
+ if (!vec_size(ftepp->conditions)) {
+ ftepp_error(ftepp, "#else without #if");
+ return false;
+ }
+ if (vec_last(ftepp->conditions).had_else) {
+ ftepp_error(ftepp, "multiple #else for a single #if");
+ return false;
+ }
+ return true;
}
static bool ftepp_hash(ftepp_t *ftepp)
{
- ppcondition cond;
- ppcondition *pc;
-
- lex_ctx ctx = ftepp_ctx(ftepp);
-
- if (!ftepp_skipspace(ftepp))
- return false;
-
- switch (ftepp->token) {
- case TOKEN_KEYWORD:
- case TOKEN_IDENT:
- if (!strcmp(ftepp_tokval(ftepp), "define")) {
- return ftepp_define(ftepp);
- }
- else if (!strcmp(ftepp_tokval(ftepp), "ifdef")) {
- if (!ftepp_ifdef(ftepp, &cond))
- return false;
- vec_push(ftepp->conditions, cond);
- return true;
- }
- else if (!strcmp(ftepp_tokval(ftepp), "ifndef")) {
- if (!ftepp_ifdef(ftepp, &cond))
- return false;
- cond.on = !cond.on;
- vec_push(ftepp->conditions, cond);
- return true;
- }
- else if (!strcmp(ftepp_tokval(ftepp), "elifdef")) {
- if (!ftepp_else_allowed(ftepp))
- return false;
- if (!ftepp_ifdef(ftepp, &cond))
- return false;
- pc = &vec_last(ftepp->conditions);
- pc->on = !pc->was_on && cond.on;
- pc->was_on = pc->was_on || pc->on;
- return true;
- }
- else if (!strcmp(ftepp_tokval(ftepp), "elifndef")) {
- if (!ftepp_else_allowed(ftepp))
- return false;
- if (!ftepp_ifdef(ftepp, &cond))
- return false;
- cond.on = !cond.on;
- pc = &vec_last(ftepp->conditions);
- pc->on = !pc->was_on && cond.on;
- pc->was_on = pc->was_on || pc->on;
- return true;
- }
- else if (!strcmp(ftepp_tokval(ftepp), "elif")) {
- if (!ftepp_else_allowed(ftepp))
- return false;
- if (!ftepp_if(ftepp, &cond))
- return false;
- pc = &vec_last(ftepp->conditions);
- pc->on = !pc->was_on && cond.on;
- pc->was_on = pc->was_on || pc->on;
- return true;
- }
- else if (!strcmp(ftepp_tokval(ftepp), "if")) {
- if (!ftepp_if(ftepp, &cond))
- return false;
- vec_push(ftepp->conditions, cond);
- return true;
- }
- else if (!strcmp(ftepp_tokval(ftepp), "else")) {
- if (!ftepp_else_allowed(ftepp))
- return false;
- pc = &vec_last(ftepp->conditions);
- pc->on = !pc->was_on;
- pc->had_else = true;
- return true;
- }
- else if (!strcmp(ftepp_tokval(ftepp), "endif")) {
- if (!vec_size(ftepp->conditions)) {
- ftepp_error(ftepp, "#endif without #if");
- return false;
- }
- vec_pop(ftepp->conditions);
- break;
- }
- else {
- ftepp_error(ftepp, "unrecognized preprocessor directive: `%s`", ftepp_tokval(ftepp));
- return false;
- }
- break;
- default:
- ftepp_error(ftepp, "unexpected preprocessor token: `%s`", ftepp_tokval(ftepp));
- return false;
- case TOKEN_EOL:
- ftepp_errorat(ftepp, ctx, "empty preprocessor directive");
- return false;
- case TOKEN_EOF:
- ftepp_error(ftepp, "missing newline at end of file", ftepp_tokval(ftepp));
- return false;
- }
- return true;
-}
+ ppcondition cond;
+ ppcondition *pc;
-static void ftepp_out(ftepp_t *ftepp, const char *str)
-{
- if (!vec_size(ftepp->conditions) ||
- vec_last(ftepp->conditions).on)
- {
- printf("%s", str);
- }
+ lex_ctx ctx = ftepp_ctx(ftepp);
+
+ if (!ftepp_skipspace(ftepp))
+ return false;
+
+ switch (ftepp->token) {
+ case TOKEN_KEYWORD:
+ case TOKEN_IDENT:
+ case TOKEN_TYPENAME:
+ if (!strcmp(ftepp_tokval(ftepp), "define")) {
+ return ftepp_define(ftepp);
+ }
+ else if (!strcmp(ftepp_tokval(ftepp), "ifdef")) {
+ if (!ftepp_ifdef(ftepp, &cond))
+ return false;
+ cond.was_on = cond.on;
+ vec_push(ftepp->conditions, cond);
+ break;
+ }
+ else if (!strcmp(ftepp_tokval(ftepp), "ifndef")) {
+ if (!ftepp_ifdef(ftepp, &cond))
+ return false;
+ cond.on = !cond.on;
+ cond.was_on = cond.on;
+ vec_push(ftepp->conditions, cond);
+ break;
+ }
+ else if (!strcmp(ftepp_tokval(ftepp), "elifdef")) {
+ if (!ftepp_else_allowed(ftepp))
+ return false;
+ if (!ftepp_ifdef(ftepp, &cond))
+ return false;
+ pc = &vec_last(ftepp->conditions);
+ pc->on = !pc->was_on && cond.on;
+ pc->was_on = pc->was_on || pc->on;
+ break;
+ }
+ else if (!strcmp(ftepp_tokval(ftepp), "elifndef")) {
+ if (!ftepp_else_allowed(ftepp))
+ return false;
+ if (!ftepp_ifdef(ftepp, &cond))
+ return false;
+ cond.on = !cond.on;
+ pc = &vec_last(ftepp->conditions);
+ pc->on = !pc->was_on && cond.on;
+ pc->was_on = pc->was_on || pc->on;
+ break;
+ }
+ else if (!strcmp(ftepp_tokval(ftepp), "elif")) {
+ if (!ftepp_else_allowed(ftepp))
+ return false;
+ if (!ftepp_if(ftepp, &cond))
+ return false;
+ pc = &vec_last(ftepp->conditions);
+ pc->on = !pc->was_on && cond.on;
+ pc->was_on = pc->was_on || pc->on;
+ break;
+ }
+ else if (!strcmp(ftepp_tokval(ftepp), "if")) {
+ if (!ftepp_if(ftepp, &cond))
+ return false;
+ cond.was_on = cond.on;
+ vec_push(ftepp->conditions, cond);
+ break;
+ }
+ else if (!strcmp(ftepp_tokval(ftepp), "else")) {
+ if (!ftepp_else_allowed(ftepp))
+ return false;
+ pc = &vec_last(ftepp->conditions);
+ pc->on = !pc->was_on;
+ pc->had_else = true;
+ ftepp_next(ftepp);
+ break;
+ }
+ else if (!strcmp(ftepp_tokval(ftepp), "endif")) {
+ if (!vec_size(ftepp->conditions)) {
+ ftepp_error(ftepp, "#endif without #if");
+ return false;
+ }
+ vec_pop(ftepp->conditions);
+ ftepp_next(ftepp);
+ break;
+ }
+ else {
+ ftepp_error(ftepp, "unrecognized preprocessor directive: `%s`", ftepp_tokval(ftepp));
+ return false;
+ }
+ break;
+ default:
+ ftepp_error(ftepp, "unexpected preprocessor token: `%s`", ftepp_tokval(ftepp));
+ return false;
+ case TOKEN_EOL:
+ ftepp_errorat(ftepp, ctx, "empty preprocessor directive");
+ return false;
+ case TOKEN_EOF:
+ ftepp_error(ftepp, "missing newline at end of file", ftepp_tokval(ftepp));
+ return false;
+ }
+ if (!ftepp_skipspace(ftepp))
+ return false;
+ return true;
}
static bool ftepp_preprocess(ftepp_t *ftepp)
{
- bool newline = true;
-
- ftepp->lex->flags.preprocessing = true;
-
- ftepp_next(ftepp);
- do
- {
- if (ftepp->token >= TOKEN_EOF)
- break;
-
- ftepp->newline = newline;
- newline = false;
-
- switch (ftepp->token) {
- case '#':
- if (!ftepp->newline) {
- ftepp_out(ftepp, ftepp_tokval(ftepp));
- ftepp_next(ftepp);
- break;
- }
- if (ftepp_next(ftepp) >= TOKEN_EOF) {
- ftepp_error(ftepp, "error in preprocessor directive");
- ftepp->token = TOKEN_ERROR;
- break;
- }
- if (!ftepp_hash(ftepp))
- ftepp->token = TOKEN_ERROR;
- break;
- case TOKEN_EOL:
- newline = true;
- ftepp_out(ftepp, "\n");
- ftepp_next(ftepp);
- break;
- default:
- ftepp_out(ftepp, ftepp_tokval(ftepp));
- ftepp_next(ftepp);
- break;
- }
- } while (!ftepp->errors && ftepp->token < TOKEN_EOF);
-
- ftepp_delete(ftepp);
- return (ftepp->token == TOKEN_EOF);
+ ppmacro *macro;
+ bool newline = true;
+
+ ftepp->lex->flags.preprocessing = true;
+ ftepp->lex->flags.mergelines = false;
+ ftepp->lex->flags.noops = true;
+
+ ftepp_next(ftepp);
+ do
+ {
+ if (ftepp->token >= TOKEN_EOF)
+ break;
+
+ ftepp->newline = newline;
+ newline = false;
+
+ switch (ftepp->token) {
+ case TOKEN_KEYWORD:
+ case TOKEN_IDENT:
+ case TOKEN_TYPENAME:
+ macro = ftepp_macro_find(ftepp, ftepp_tokval(ftepp));
+ if (!macro) {
+ ftepp_out(ftepp, ftepp_tokval(ftepp), false);
+ ftepp_next(ftepp);
+ break;
+ }
+ if (!ftepp_macro_call(ftepp, macro))
+ ftepp->token = TOKEN_ERROR;
+ break;
+ case '#':
+ if (!ftepp->newline) {
+ ftepp_out(ftepp, ftepp_tokval(ftepp), false);
+ ftepp_next(ftepp);
+ break;
+ }
+ ftepp->lex->flags.mergelines = true;
+ if (ftepp_next(ftepp) >= TOKEN_EOF) {
+ ftepp_error(ftepp, "error in preprocessor directive");
+ ftepp->token = TOKEN_ERROR;
+ break;
+ }
+ if (!ftepp_hash(ftepp))
+ ftepp->token = TOKEN_ERROR;
+ ftepp->lex->flags.mergelines = false;
+ break;
+ case TOKEN_EOL:
+ newline = true;
+ ftepp_out(ftepp, "\n", true);
+ ftepp_next(ftepp);
+ break;
+ default:
+ ftepp_out(ftepp, ftepp_tokval(ftepp), false);
+ ftepp_next(ftepp);
+ break;
+ }
+ } while (!ftepp->errors && ftepp->token < TOKEN_EOF);
+
+ newline = ftepp->token == TOKEN_EOF;
+ ftepp_delete(ftepp);
+ return newline;
}
bool ftepp_preprocess_file(const char *filename)
{
- ftepp_t *ftepp = ftepp_init();
+ ftepp_t *ftepp = ftepp_init();
ftepp->lex = lex_open(filename);
if (!ftepp->lex) {
con_out("failed to open file \"%s\"\n", filename);
bool ftepp_preprocess_string(const char *name, const char *str)
{
- ftepp_t *ftepp = ftepp_init();
+ ftepp_t *ftepp = ftepp_init();
ftepp->lex = lex_open_string(str, strlen(str), name);
if (!ftepp->lex) {
con_out("failed to create lexer for string \"%s\"\n", name);
projects / xonotic / gmqcc.git / blobdiff