Adjusted cc_macro.c formatting with astyle -A1tSxejz2fpUxV
This commit is contained in:
Jeremiah Orians
parent
63bb59404d
commit
0ab7cb78eb
557
cc_macro.c
557
cc_macro.c
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@ -18,332 +18,357 @@
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#include "gcc_req.h"
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void require(int bool, char* error);
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int numerate_string(char *a);
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void line_error_token(struct token_list *);
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int numerate_string(char* a);
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void line_error_token(struct token_list* list);
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struct conditional_inclusion {
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struct conditional_inclusion* prev;
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int include; /* 1 == include, 0 == skip */
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int previous_condition_matched; /* 1 == all subsequent conditions treated as FALSE */
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struct conditional_inclusion
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{
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struct conditional_inclusion* prev;
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int include; /* 1 == include, 0 == skip */
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int previous_condition_matched; /* 1 == all subsequent conditions treated as FALSE */
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};
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struct conditional_inclusion *conditional_inclusion_top;
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struct conditional_inclusion* conditional_inclusion_top;
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/* point where we are currently modifying the global_token list */
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struct token_list* macro_token;
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void eat_current_token()
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{
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struct token_list* tmp;
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struct token_list* tmp;
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if (NULL != macro_token->prev)
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macro_token->prev->next = macro_token->next;
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else
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global_token = macro_token->next;
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if(NULL != macro_token->prev)
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{
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macro_token->prev->next = macro_token->next;
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}
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else
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{
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global_token = macro_token->next;
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}
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/* update backlinks */
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if (NULL != macro_token->next)
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macro_token->next->prev = macro_token->prev;
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/* update backlinks */
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if(NULL != macro_token->next)
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{
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macro_token->next->prev = macro_token->prev;
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}
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tmp = macro_token;
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macro_token = macro_token->next;
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free(tmp);
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tmp = macro_token;
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macro_token = macro_token->next;
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free(tmp);
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}
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void eat_newline_tokens()
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{
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macro_token = global_token;
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macro_token = global_token;
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while (TRUE)
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{
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if (NULL == macro_token)
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return;
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while(TRUE)
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{
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if(NULL == macro_token) return;
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if(match("\n", macro_token->s))
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eat_current_token();
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else
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macro_token = macro_token->next;
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}
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if(match("\n", macro_token->s))
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{
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eat_current_token();
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}
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else
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{
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macro_token = macro_token->next;
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}
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}
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}
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int macro_expression();
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int macro_variable()
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{
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eat_current_token();
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return 0;
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eat_current_token();
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return 0;
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}
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int macro_number()
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{
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int result = numerate_string(macro_token->s);
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eat_current_token();
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return result;
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int result = numerate_string(macro_token->s);
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eat_current_token();
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return result;
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}
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int macro_primary_expr()
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{
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if ('-' == macro_token->s[0])
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{
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eat_current_token();
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return -macro_primary_expr();
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}
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else if ('!' == macro_token->s[0])
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{
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eat_current_token();
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return !macro_primary_expr();
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}
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else if ('(' == macro_token->s[0])
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{
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eat_current_token();
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return macro_expression();
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} else if (in_set(macro_token->s[0], "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_"))
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return macro_variable();
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else if (in_set(macro_token->s[0], "0123456789"))
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return macro_number();
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else
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return 0; /* FIXME: error handling */
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if('-' == macro_token->s[0])
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{
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eat_current_token();
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return -macro_primary_expr();
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}
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else if('!' == macro_token->s[0])
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{
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eat_current_token();
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return !macro_primary_expr();
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}
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else if('(' == macro_token->s[0])
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{
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eat_current_token();
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return macro_expression();
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}
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else if(in_set(macro_token->s[0], "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_"))
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{
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return macro_variable();
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}
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else if(in_set(macro_token->s[0], "0123456789"))
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{
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return macro_number();
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}
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else
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{
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return 0; /* FIXME: error handling */
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}
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}
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int macro_additive_expr()
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{
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int lhs = macro_primary_expr();
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int lhs = macro_primary_expr();
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if (match("+", macro_token->s))
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{
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eat_current_token();
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return lhs + macro_additive_expr();
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}
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else if (match("-", macro_token->s))
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{
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eat_current_token();
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return lhs - macro_additive_expr();
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}
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else if (match("*", macro_token->s))
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{
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eat_current_token();
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return lhs * macro_additive_expr();
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}
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else if (match("/", macro_token->s))
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{
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eat_current_token();
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return lhs / macro_additive_expr();
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}
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else if (match("%", macro_token->s))
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{
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eat_current_token();
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return lhs % macro_additive_expr();
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}
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else if (match(">>", macro_token->s))
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{
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eat_current_token();
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return lhs >> macro_additive_expr();
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}
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else if (match("<<", macro_token->s))
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{
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eat_current_token();
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return lhs << macro_additive_expr();
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}
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else
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{
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return lhs;
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}
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if(match("+", macro_token->s))
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{
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eat_current_token();
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return lhs + macro_additive_expr();
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}
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else if(match("-", macro_token->s))
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{
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eat_current_token();
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return lhs - macro_additive_expr();
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}
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else if(match("*", macro_token->s))
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{
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eat_current_token();
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return lhs * macro_additive_expr();
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}
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else if(match("/", macro_token->s))
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{
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eat_current_token();
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return lhs / macro_additive_expr();
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}
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else if(match("%", macro_token->s))
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{
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eat_current_token();
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return lhs % macro_additive_expr();
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}
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else if(match(">>", macro_token->s))
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{
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eat_current_token();
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return lhs >> macro_additive_expr();
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}
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else if(match("<<", macro_token->s))
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{
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eat_current_token();
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return lhs << macro_additive_expr();
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}
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else
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{
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return lhs;
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}
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}
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int macro_relational_expr()
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{
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int lhs = macro_additive_expr();
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int lhs = macro_additive_expr();
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if (match("<", macro_token->s))
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{
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eat_current_token();
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return lhs < macro_relational_expr();
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}
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else if (match("<=", macro_token->s))
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{
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eat_current_token();
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return lhs <= macro_relational_expr();
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}
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else if (match(">=", macro_token->s))
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{
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eat_current_token();
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return lhs >= macro_relational_expr();
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}
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else if (match(">", macro_token->s))
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{
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eat_current_token();
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return lhs > macro_relational_expr();
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}
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else if (match("==", macro_token->s))
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{
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eat_current_token();
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return lhs == macro_relational_expr();
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}
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else if (match("!=", macro_token->s))
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{
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eat_current_token();
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return lhs != macro_relational_expr();
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}
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else
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{
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return lhs;
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}
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if(match("<", macro_token->s))
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{
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eat_current_token();
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return lhs < macro_relational_expr();
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}
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else if(match("<=", macro_token->s))
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{
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eat_current_token();
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return lhs <= macro_relational_expr();
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}
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else if(match(">=", macro_token->s))
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{
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eat_current_token();
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return lhs >= macro_relational_expr();
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}
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else if(match(">", macro_token->s))
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{
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eat_current_token();
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return lhs > macro_relational_expr();
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}
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else if(match("==", macro_token->s))
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{
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eat_current_token();
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return lhs == macro_relational_expr();
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}
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else if(match("!=", macro_token->s))
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{
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eat_current_token();
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return lhs != macro_relational_expr();
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}
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else
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{
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return lhs;
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}
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}
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int macro_bitwise_expr()
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{
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int rhs;
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int lhs = macro_relational_expr();
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int rhs;
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int lhs = macro_relational_expr();
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if (match("&", macro_token->s))
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{
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eat_current_token();
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return lhs & macro_bitwise_expr();
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}
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else if (match("&&", macro_token->s))
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{
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eat_current_token();
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rhs = macro_bitwise_expr();
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return lhs && rhs;
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}
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else if (match("|", macro_token->s))
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{
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eat_current_token();
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rhs = macro_bitwise_expr();
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return lhs | rhs;
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}
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else if (match("||", macro_token->s))
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{
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eat_current_token();
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rhs = macro_bitwise_expr();
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return lhs || rhs;
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}
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else if (match("^", macro_token->s))
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{
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eat_current_token();
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rhs = macro_bitwise_expr();
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return lhs ^ rhs;
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}
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else
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{
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return lhs;
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}
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if(match("&", macro_token->s))
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{
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eat_current_token();
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return lhs & macro_bitwise_expr();
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}
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else if(match("&&", macro_token->s))
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{
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eat_current_token();
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rhs = macro_bitwise_expr();
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return lhs && rhs;
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}
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else if(match("|", macro_token->s))
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{
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eat_current_token();
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rhs = macro_bitwise_expr();
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return lhs | rhs;
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}
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else if(match("||", macro_token->s))
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{
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eat_current_token();
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rhs = macro_bitwise_expr();
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return lhs || rhs;
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}
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else if(match("^", macro_token->s))
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{
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eat_current_token();
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rhs = macro_bitwise_expr();
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return lhs ^ rhs;
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}
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else
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{
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return lhs;
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}
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}
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int macro_expression()
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{
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return macro_bitwise_expr();
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return macro_bitwise_expr();
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}
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void macro_directive()
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{
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struct conditional_inclusion *t;
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int result;
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/* FIXME: whitespace is allowed between "#"" and "if" */
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if(match("#if", macro_token->s))
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{
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eat_current_token();
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/* evaluate constant integer expression */
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result = macro_expression();
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/* push conditional inclusion */
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t = calloc(1, sizeof(struct conditional_inclusion));
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t->prev = conditional_inclusion_top;
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conditional_inclusion_top = t;
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t->include = TRUE;
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if (FALSE == result)
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{
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t->include = FALSE;
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}
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t->previous_condition_matched = t->include;
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}
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else if (match("#elif", macro_token->s))
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{
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eat_current_token();
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result = macro_expression();
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conditional_inclusion_top->include = result && !conditional_inclusion_top->previous_condition_matched;
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conditional_inclusion_top->previous_condition_matched =
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conditional_inclusion_top->previous_condition_matched || conditional_inclusion_top->include;
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}
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else if (match("#else", macro_token->s))
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{
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eat_current_token();
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conditional_inclusion_top->include = !conditional_inclusion_top->previous_condition_matched;
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}
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else if (match("#endif", macro_token->s))
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{
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if (NULL == conditional_inclusion_top)
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{
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line_error_token(macro_token);
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file_print("unexpected #endif\n", stderr);
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exit(EXIT_FAILURE);
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}
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eat_current_token();
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/* pop conditional inclusion */
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t = conditional_inclusion_top;
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conditional_inclusion_top = conditional_inclusion_top->prev;
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free(t);
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}
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else
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{
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/* unhandled macro directive; let's eat until a newline; om nom nom */
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while (TRUE)
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{
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if (NULL == macro_token)
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return;
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struct conditional_inclusion *t;
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int result;
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if ('\n' == macro_token->s[0])
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return;
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/* FIXME: whitespace is allowed between "#"" and "if" */
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if(match("#if", macro_token->s))
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{
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eat_current_token();
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/* evaluate constant integer expression */
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result = macro_expression();
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/* push conditional inclusion */
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t = calloc(1, sizeof(struct conditional_inclusion));
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t->prev = conditional_inclusion_top;
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conditional_inclusion_top = t;
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t->include = TRUE;
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eat_current_token();
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}
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}
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if(FALSE == result)
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{
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t->include = FALSE;
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}
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t->previous_condition_matched = t->include;
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}
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else if(match("#elif", macro_token->s))
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{
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eat_current_token();
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result = macro_expression();
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conditional_inclusion_top->include = result && !conditional_inclusion_top->previous_condition_matched;
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conditional_inclusion_top->previous_condition_matched =
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conditional_inclusion_top->previous_condition_matched || conditional_inclusion_top->include;
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}
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else if(match("#else", macro_token->s))
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{
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eat_current_token();
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conditional_inclusion_top->include = !conditional_inclusion_top->previous_condition_matched;
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}
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else if(match("#endif", macro_token->s))
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{
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if(NULL == conditional_inclusion_top)
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{
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line_error_token(macro_token);
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file_print("unexpected #endif\n", stderr);
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exit(EXIT_FAILURE);
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}
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eat_current_token();
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/* pop conditional inclusion */
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t = conditional_inclusion_top;
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conditional_inclusion_top = conditional_inclusion_top->prev;
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free(t);
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}
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else
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{
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/* unhandled macro directive; let's eat until a newline; om nom nom */
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while(TRUE)
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{
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if(NULL == macro_token)
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{
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return;
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}
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if('\n' == macro_token->s[0])
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{
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return;
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}
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eat_current_token();
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}
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}
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}
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void preprocess()
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{
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int start_of_line = TRUE;
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macro_token = global_token;
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int start_of_line = TRUE;
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macro_token = global_token;
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while (NULL != macro_token)
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{
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while(NULL != macro_token)
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{
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if(start_of_line && '#' == macro_token->s[0])
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{
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macro_directive();
|
||||
|
||||
if (start_of_line && '#' == macro_token->s[0])
|
||||
{
|
||||
macro_directive();
|
||||
if (macro_token)
|
||||
{
|
||||
if ('\n' != macro_token->s[0])
|
||||
{
|
||||
line_error_token(macro_token);
|
||||
file_print("newline expected at end of macro directive\n", stderr);
|
||||
file_print("found: '", stderr);
|
||||
file_print(macro_token->s, stderr);
|
||||
file_print("'\n", stderr);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
}
|
||||
}
|
||||
else if ('\n' == macro_token->s[0])
|
||||
{
|
||||
start_of_line = TRUE;
|
||||
macro_token = macro_token->next;
|
||||
}
|
||||
else
|
||||
{
|
||||
start_of_line = FALSE;
|
||||
if (NULL == conditional_inclusion_top)
|
||||
{
|
||||
macro_token = macro_token->next;
|
||||
}
|
||||
else if (!conditional_inclusion_top->include)
|
||||
{
|
||||
/* rewrite the token stream to exclude the current token */
|
||||
eat_current_token();
|
||||
}
|
||||
else
|
||||
{
|
||||
macro_token = macro_token->next;
|
||||
}
|
||||
}
|
||||
}
|
||||
if(macro_token)
|
||||
{
|
||||
if('\n' != macro_token->s[0])
|
||||
{
|
||||
line_error_token(macro_token);
|
||||
file_print("newline expected at end of macro directive\n", stderr);
|
||||
file_print("found: '", stderr);
|
||||
file_print(macro_token->s, stderr);
|
||||
file_print("'\n", stderr);
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
}
|
||||
}
|
||||
else if('\n' == macro_token->s[0])
|
||||
{
|
||||
start_of_line = TRUE;
|
||||
macro_token = macro_token->next;
|
||||
}
|
||||
else
|
||||
{
|
||||
start_of_line = FALSE;
|
||||
|
||||
if(NULL == conditional_inclusion_top)
|
||||
{
|
||||
macro_token = macro_token->next;
|
||||
}
|
||||
else if(!conditional_inclusion_top->include)
|
||||
{
|
||||
/* rewrite the token stream to exclude the current token */
|
||||
eat_current_token();
|
||||
}
|
||||
else
|
||||
{
|
||||
macro_token = macro_token->next;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue