116 lines
2.2 KiB
Org Mode
116 lines
2.2 KiB
Org Mode
M2-Planet is subset of the C programming language.
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Mostly eliminating features that have yet to be proven useful in building compilers, linkers or assemblers.
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* Global variables
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** Assignment
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*** struct initialization
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M2-Planet doesn't support static initialization for structs yet.
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Simply because time hasn't been made available for the effort.
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Patches for adding support are welcome.
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*** AMD64 & AArch64 int initialization wrong
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right now the code in cc_core.c in the function void program() simply doesn't output the correct output for AArch64 or AMD64.
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As the function should numerate the string global_token to determine if the leading 32bits should be 0 or 0xFFFFFFFF and output %0 or %0xFFFFFFFF accordingly.
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**** example of failing code
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#include<stdlib.h>
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#include<stdio.h>
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#include<string.h>
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void write_string(char* s, FILE* f)
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{
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while(0 != s[0])
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{
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fputc(s[0], f);
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s = s + 1;
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}
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}
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void* empty = 0;
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int main()
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{
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if (0 == empty)
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{
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write_string("Yes, is empty\n", stdout);
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}
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else
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{
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write_string("Oops, why not?\n", stdout);
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}
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return 0;
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}
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* Arrays
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** multidimensional arrays return wrong results
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*** example of failing code
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#include <stdio.h>
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char** env_argv;
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char getargchar(int n, int k)
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{
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return env_argv[n][k];
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}
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int main(int argc, char** argv)
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{
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env_argv = argv;
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fputc(getargchar(2, 4), stdout);
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return 0;
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}
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run with: ./example 12345 abcdef ABCDEF
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*** work around code
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char getargchar(int n, int k)
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{
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char *tmp = env_argv[n];
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return tmp[k];
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}
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* typedef doesn't work
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M2-Planet doesn't support this function yet as the time for its development has not been allocated yet.
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Patches are welcome
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* C style function pointers
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M2-Planet supports universal function pointers FUNCTION
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Simply delete the typedef and the code works fine in M2-Planet
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** example of failing code
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#include <stdio.h>
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typedef int (*FUNCTION) ();
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struct function
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{
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FUNCTION function;
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int arity;
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char* name;
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};
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struct function fun_make_cell_;
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int make_cell_ ()
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{
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char* i = fun_make_cell_.name;
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while(0 != i[0])
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{
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fputc(i[0], stdout);
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i = i + 1;
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}
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return fun_make_cell_.arity;
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}
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int main ()
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{
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fun_make_cell_.function = make_cell_;
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fun_make_cell_.arity = 2;
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fun_make_cell_.name = "bar\n";
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fun_make_cell_.function();
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}
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