C Language Reference (C17 Subset)

PBXB64 supports a controlled C17 subset interoperable with B64/PB/PILOT through the unified IR. V8 adds full preprocessor, runtime control flow, and 26 standard headers. V9 hardens preprocessor corner cases, adds function pointers, and strengthens runtime aliases.

Preprocessor (V8/V9 Full Support)

#define MAX 100
#define ADD(a,b) ((a)+(b))

#if MAX > 50
    int x = 1;
#elif defined(DEBUG)
    int x = 2;
#else
    int x = 3;
#endif

#ifdef __STDC__
    int ver = __STDC_VERSION__;  // 201710L
#endif

// Stringification and token paste
#define STR(x) #x
#define CAT(a,b) a##b

C17 Standard Headers (V8/V9)

26 C17 headers available at core/include/c17/. Include with -I flag:

PBXB64 -I core/include/c17 program.c -o program.exe

V9 Runtime & Function Pointers

// Simple direct function pointer call (V9)
long long add(long long a, long long b) { return a + b; }
int main(void) {
    long long (*fp)(long long, long long) = &add;
    return (int)fp(20, 22);
}

// Runtime aliases (V9)
void* p = malloc(100);   // Maps to KERNEL32 HeapAlloc
free(p);                 // Maps to KERNEL32 HeapFree
size_t len = strlen(s);  // Native bestof implementation

Control Flow (V8)

// switch/case with fallthrough
switch (x) {
    case 1: do_something(); break;
    case 2:
    case 3: do_other();    // intentional fallthrough
        break;
    default: break;
}

// goto/labels
if (x) goto label;
label: return 0;

// ternary operator
return (x > 0) ? 1 : -1;

// multi-increment for loop
for (int i = 0; i < 10; i++, j += 2) {
    body
}

Language Features (V8/V9)