source: doc/papers/OOPSLA17/evaluation/c-print.c@ 2097cd4

#include <stdarg.h>
#include <stdio.h>
#include "c-pair.h"
#include "c-print.h"

void print_string(FILE* out, const char* x) { fprintf(out, "%s", x); }

void print_bool(FILE* out, _Bool x) { fprintf(out, "%s", x ? "true" : "false"); }

void print_char(FILE* out, char x) {
        if ( 0x20 <= x && x <= 0x7E ) { fprintf(out, "'%c'", x); }
        else { fprintf(out, "'\\%x'", x); }
}

void print_int(FILE* out, int x) { fprintf(out, "%d", x); }

void print_fmt(FILE* out, char fmt, void* p) {
        switch( fmt ) {
        case 's': print_string(out, (const char*)p); break; /***/
        case 'b': print_bool(out, *(_Bool*)p); break; /***/
        case 'c': print_char(out, *(char*)p); break; /***/
        case 'd': print_int(out, *(int*)p); break; /***/
        }
}

void print(FILE* out, const char* fmt, ...) {
        va_list args;
        va_start(args, fmt);
        for (const char* it = fmt; *it; ++it) {
                switch( *it ) {
                case 's': print_string(out, va_arg(args, const char*)); break; /***/
                case 'b': print_bool(out, va_arg(args, int)); break; /***/
                case 'c': print_char(out, va_arg(args, int)); break; /***/
                case 'd': print_int(out, va_arg(args, int)); break; /***/
                case 'p': {
                        const struct pair x = va_arg(args, const struct pair); /***/
                        fprintf(out, "[");
                        print_fmt(out, *++it, x.first); /***/
                        fprintf(out, ", ");
                        print_fmt(out, *++it, x.second); /***/
                        fprintf(out, "]");
                        break;
                }
                }
        }
        va_end(args);
}