Isolated global_token to cc.c and added FOR Loop support along with example
This commit is contained in:
Jeremiah Orians
parent
f3e3b6eb5b
commit
32e1f700bc
59
cc.c
59
cc.c
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@ -18,20 +18,26 @@
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#include "cc.h"
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#include <stdint.h>
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#define GLOBAL 1
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#define FUNCTION 2
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#define LOCAL_VARIABLE 4
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#define ARGUEMENT 8
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/* Globals */
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struct token_list* global_symbol_list;
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struct token_list* global_stack;
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struct token_list* global_token;
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/* Imported functions */
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int asprintf(char **strp, const char *fmt, ...);
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void read_all_tokens(char* source_file);
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struct token_list* read_all_tokens(char* source_file);
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struct token_list* emit(char *s, bool hands_off, struct token_list* head)
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{
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struct token_list* t = calloc(1, sizeof(struct token_list));
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t->next = head;
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t->hands_off = hands_off;
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head = t;
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t->s = s;
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return t;
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}
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@ -141,7 +147,7 @@ void require_char(char* message, char required)
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}
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struct token_list* expression(struct token_list* out);
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struct token_list* parse_string(struct token_list* out);
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struct token_list* parse_string(struct token_list* output_list, char* string);
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/*
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* primary-expr:
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@ -178,7 +184,7 @@ struct token_list* primary_expr(struct token_list* out)
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}
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else if(global_token->s[0] == '"')
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{
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out = parse_string(out);
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out = parse_string(out, global_token->s);
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global_token = global_token->next;
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}
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else exit(EXIT_FAILURE);
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@ -471,6 +477,44 @@ struct token_list* process_if(struct token_list* out)
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return out;
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}
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int for_count;
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struct token_list* process_for(struct token_list* out)
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{
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char* label;
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int number = for_count;
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for_count = for_count + 1;
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asprintf(&label, "# FOR_initialization_%d\n", number);
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out = emit(label, true, out);
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global_token = global_token->next;
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require_char("ERROR in process_for\nMISSING (\n", '(');
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out = expression(out);
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asprintf(&label, ":FOR_%d\n", number);
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out = emit(label, true, out);
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require_char("ERROR in process_for\nMISSING ;1\n", ';');
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out = expression(out);
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asprintf(&label, "TEST\nJUMP_EQ %c%s_%d\nJUMP %c%s_%d\n:FOR_ITER_%d\n", 37, "FOR_END", number, 37, "FOR_THEN", number, number);
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out = emit(label, true, out);
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require_char("ERROR in process_for\nMISSING ;2\n", ';');
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out = expression(out);
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asprintf(&label, "JUMP %c%s_%d\n:FOR_THEN_%d\n", 37, "FOR", number, number);
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out = emit(label, true, out);
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require_char("ERROR in process_for\nMISSING )\n", ')');
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out = statement(out);
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asprintf(&label, "JUMP %c%s_ITER_%d\n:FOR_END_%d\n", 37, "FOR", number, number);
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out = emit(label, true, out);
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return out;
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}
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/* Process while loops */
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int while_count;
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struct token_list* process_while(struct token_list* out)
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@ -533,6 +577,7 @@ struct token_list* recursive_statement(struct token_list* out)
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* if ( expression ) statement
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* if ( expression ) statement else statement
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* while ( expression ) statement
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* for ( expression ; expression ; expression ) statement
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* return ;
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* expr ;
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*/
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@ -542,6 +587,7 @@ struct token_list* statement(struct token_list* out)
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else if((!strcmp(global_token->s, "char")) | (!strcmp(global_token->s, "int"))) out = collect_local(out);
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else if(!strcmp(global_token->s, "if")) out = process_if(out);
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else if(!strcmp(global_token->s, "while")) out = process_while(out);
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else if(!strcmp(global_token->s, "for")) out = process_for(out);
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else if(!strcmp(global_token->s, "return")) out = return_result(out);
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else
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{
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@ -586,8 +632,7 @@ struct token_list* declare_global(struct token_list* out)
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sym_declare(global_token->prev->s, GLOBAL);
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global_token = global_token->next;
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out = emit("NOP\n", true, out);
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return out;
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return emit("NOP\n", true, out);
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}
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struct token_list* declare_function(struct token_list* out)
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@ -674,7 +719,7 @@ int main(int argc, char **argv)
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exit(EXIT_FAILURE);
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}
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read_all_tokens(argv[1]);
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global_token = read_all_tokens(argv[1]);
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struct token_list* output_list = program(NULL);
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FILE* output = fopen(argv[2], "w");
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recursive_output(output, output_list);
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7
cc.h
7
cc.h
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@ -20,11 +20,6 @@
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#include <string.h>
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#include <stdbool.h>
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#define GLOBAL 1
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#define FUNCTION 2
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#define LOCAL_VARIABLE 4
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#define ARGUEMENT 8
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struct token_list
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{
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struct token_list* next;
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@ -41,5 +36,3 @@ struct token_list
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bool hands_off;
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};
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};
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struct token_list* global_token;
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18
cc_reader.c
18
cc_reader.c
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@ -17,6 +17,7 @@
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#include "cc.h"
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FILE* input;
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struct token_list* token;
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char clearWhiteSpace(char c)
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{
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@ -39,8 +40,15 @@ char consume_word(struct token_list* current, char c, char frequent)
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return consume_byte(current, c);
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}
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char purge_macro(int ch)
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{
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while(10 != ch) ch = fgetc(input);
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return ch;
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}
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int get_token(int c)
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{
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if('#' == c) c = purge_macro(c);
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bool w = true;
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struct token_list* current = calloc(1, sizeof(struct token_list));
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@ -77,9 +85,9 @@ int get_token(int c)
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}
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}
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current->prev = global_token;
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current->next = global_token;
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global_token = current;
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current->prev = token;
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current->next = token;
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token = current;
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return c;
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}
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@ -96,11 +104,11 @@ struct token_list* reverse_list(struct token_list* head)
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return root;
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}
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void read_all_tokens(char* source_file)
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struct token_list* read_all_tokens(char* source_file)
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{
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input = fopen(source_file, "r");
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int ch =fgetc(input);
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while(EOF != ch) ch = get_token(ch);
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global_token = reverse_list(global_token);
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return reverse_list(token);
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}
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20
cc_strings.c
20
cc_strings.c
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@ -67,7 +67,7 @@ bool weird(char c)
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/* Parse string to deal with hex characters*/
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char table[16] = {0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46};
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struct token_list* parse_string(struct token_list* output_list)
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struct token_list* parse_string(struct token_list* output_list, char* string)
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{
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char* label;
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static int string_num;
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@ -79,25 +79,25 @@ struct token_list* parse_string(struct token_list* output_list)
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bool hexit = false;
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message[0] = '"';
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while(global_token->s[j] != '"')
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while(string[j] != '"')
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{
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hold[k] = ' ';
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if((global_token->s[j] == 92) & (global_token->s[j + 1] == 'x'))
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if((string[j] == 92) & (string[j + 1] == 'x'))
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{
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hold[k + 1] = upcase(global_token->s[j + 2]);
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hold[k + 2] = upcase(global_token->s[j + 3]);
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int t1 = hex(global_token->s[j + 2], true);
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int t2 = hex(global_token->s[j + 3], false);
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hold[k + 1] = upcase(string[j + 2]);
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hold[k + 2] = upcase(string[j + 3]);
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int t1 = hex(string[j + 2], true);
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int t2 = hex(string[j + 3], false);
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message[i] = t1 + t2;
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if(weird(message[i])) hexit = true;
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j = j + 4;
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}
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else
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{
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hold[k + 1] = table[(global_token->s[j] >> 4)];
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hold[k + 2] = table[(global_token->s[j] & 15)];
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message[i] = global_token->s[j];
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hold[k + 1] = table[(string[j] >> 4)];
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hold[k + 2] = table[(string[j] & 15)];
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message[i] = string[j];
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j = j + 1;
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}
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@ -0,0 +1,36 @@
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/* Copyright (C) 2016 Jeremiah Orians
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* This file is part of stage0.
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*
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* stage0 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* stage0 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with stage0. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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int putchar(int);
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int main()
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{
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int max = 90;
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int i;
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int j;
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for(i = 65; i <= max; i = i + 1)
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{
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putchar(i);
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for(j = i + 1; j <= max; j = j + 1)
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{
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putchar(j);
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}
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putchar(10);
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}
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return 0;
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}
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@ -0,0 +1,22 @@
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#!/bin/bash
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## Copyright (C) 2016 Jeremiah Orians
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## This file is part of stage0.
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##
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## stage0 is free software: you an redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## stage0 is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with stage0. If not, see <http://www.gnu.org/licenses/>.
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# example for compiling example For loop test
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M2-Planet for.c for.o
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M1-Macro -f x86_defs.M1 -f for.o --LittleEndian --Architecture 1 -o for.hex2
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hex2-linker -f cc_lib.hex2 -f for.hex2 --LittleEndian --Architecture 1 --BaseAddress 0x8048000 -o for --exec_enable
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./for
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