fmt.h

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#pragma once
 
#include <derive-c/core/panic.h>
#include <derive-c/core/namespace.h>
 
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
 
typedef struct {
    size_t indent;
} dc_debug_fmt;
 
DC_PUBLIC static dc_debug_fmt dc_debug_fmt_new() {
    dc_debug_fmt fmt = {.indent = 0};
    return fmt;
}
 
DC_PUBLIC static void dc_debug_fmt_print_indents(dc_debug_fmt fmt, FILE* stream) {
    for (size_t i = 0; i < fmt.indent; i++) {
        fprintf(stream, "  ");
    }
}
 
DC_PUBLIC static void dc_debug_fmt_print(dc_debug_fmt fmt, FILE* stream, const char* format, ...)
#if defined(__clang__) || defined(__GNUC__)
    __attribute__((format(printf, 3, 4)))
#endif
    ;
 
DC_PUBLIC static void dc_debug_fmt_print(dc_debug_fmt fmt, FILE* stream, const char* format, ...) {
    dc_debug_fmt_print_indents(fmt, stream);
 
    va_list args;
    va_start(args, format);
#if defined(__clang__)
    #pragma clang diagnostic push
    #pragma clang diagnostic ignored "-Wformat-nonliteral"
#endif
    vfprintf(stream, format, args);
#if defined(__clang__)
    #pragma clang diagnostic pop
#endif
    va_end(args);
}

DC_PUBLIC static inline dc_debug_fmt dc_debug_fmt_scope_begin(dc_debug_fmt fmt) {
    dc_debug_fmt next = {.indent = fmt.indent + 1};
    return next;
}

DC_PUBLIC static inline dc_debug_fmt dc_debug_fmt_scope_end(dc_debug_fmt fmt) {
    DC_ASSERT(fmt.indent > 0);
    dc_debug_fmt next = {.indent = fmt.indent - 1};
    return next;
}