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/// @file
/// @brief helpers for verbose/debug printing
#pragma once
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <util/lockfile.h>
/// print an informational message
///
/// This assumes the `Verbose` global is in scope.
#define GV_INFO(...) \
do { \
if (Verbose) { \
const char *const name_ = strrchr(__FILE__, '/') == NULL \
? __FILE__ \
: strrchr(__FILE__, '/') + 1; \
lockfile(stderr); \
const time_t now_ = time(NULL); \
const struct tm *const now_tm_ = localtime(&now_); \
fprintf(stderr, "[Graphviz] %s:%d: %04d-%02d-%02d %02d:%02d: ", name_, \
__LINE__, now_tm_->tm_year + 1900, now_tm_->tm_mon + 1, \
now_tm_->tm_mday, now_tm_->tm_hour, now_tm_->tm_sec); \
fprintf(stderr, __VA_ARGS__); \
fprintf(stderr, "\n"); \
unlockfile(stderr); \
} \
} while (0)
/// print a debug message
///
/// The distinction between this and `GV_INFO` is purely semantic; this is
/// intended for messages for Graphviz developers while `GV_INFO` is intended
/// for messages for Graphviz users. In future, `GV_DEBUG` may use something
/// other than `Verbose` to guard its output.
#define GV_DEBUG(...) GV_INFO(__VA_ARGS__)
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