Split swaybg into a standalone project

1 files changed, 68 insertions, 0 deletions

diff --git a/log.c b/log.c
new file mode 100644
index 0000000..fc7b7d9
--- /dev/null
+++ b/log.c
@@ -0,0 +1,68 @@
+#define _POSIX_C_SOURCE 199506L
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include "log.h"
+
+static enum log_importance log_importance = LOG_ERROR;
+
+static const char *verbosity_colors[] = {
+	[LOG_SILENT] = "",
+	[LOG_ERROR ] = "\x1B[1;31m",
+	[LOG_INFO  ] = "\x1B[1;34m",
+	[LOG_DEBUG ] = "\x1B[1;30m",
+};
+
+void swaybg_log_init(enum log_importance verbosity) {
+	if (verbosity < LOG_IMPORTANCE_LAST) {
+		log_importance = verbosity;
+	}
+}
+
+void _swaybg_log(enum log_importance verbosity, const char *fmt, ...) {
+	if (verbosity > log_importance) {
+		return;
+	}
+
+	va_list args;
+	va_start(args, fmt);
+
+	// prefix the time to the log message
+	struct tm result;
+	time_t t = time(NULL);
+	struct tm *tm_info = localtime_r(&t, &result);
+	char buffer[26];
+
+	// generate time prefix
+	strftime(buffer, sizeof(buffer), "%F %T - ", tm_info);
+	fprintf(stderr, "%s", buffer);
+
+	unsigned c = (verbosity < LOG_IMPORTANCE_LAST)
+		? verbosity : LOG_IMPORTANCE_LAST - 1;
+
+	if (isatty(STDERR_FILENO)) {
+		fprintf(stderr, "%s", verbosity_colors[c]);
+	}
+
+	vfprintf(stderr, fmt, args);
+
+	if (isatty(STDERR_FILENO)) {
+		fprintf(stderr, "\x1B[0m");
+	}
+	fprintf(stderr, "\n");
+
+	va_end(args);
+}
+
+const char *_swaybg_strip_path(const char *filepath) {
+	if (*filepath == '.') {
+		while (*filepath == '.' || *filepath == '/') {
+			++filepath;
+		}
+	}
+	return filepath;
+}