Add Henry Eshbaugh's log module to junkcode for the moment.

It's got some useful stuff in it, but doesn't pass ccanlint here.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

junkcode/henryeshbaugh@gmail.com-log/LICENSE

@@ -0,0 +1,17 @@
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

junkcode/henryeshbaugh@gmail.com-log/_info

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+#include <ccan/log/log.h>
+
+/**
+ * log - pretty-print logging information
+ *
+ * log is a set of functions and helper macros intended to make it easy to
+ * pretty-print log entries.
+ *
+ * Example:
+ * #include <ccan/log/log.h>
+ *
+ * int main(int argc, char *argv[])
+ * {
+ * 	print_log(LOG_INFO, "This is an info message.\n");
+ *	print_log(LOG_WARNING, "This is a warning message. It indicates that"
+ *			       " an operation encountered minor issues\n");
+ *	print_log(LOG_ERROR, "This is an error message. It indicates that the\n"
+ *			     "program could not complete an operation, but\n"
+ *			     "that the error was not fatal. It might have\n"
+ *			     "an error code, like so: %x\n", 0xDEADBEEF);
+ *	print_log(LOG_CRITICAL, "This is a critical message. It indicates\n"
+ *				"that the program had an unrecoverable error.\n");
+ *      set_log_mode(LOG_CONCISE);
+ *      print_log(LOG_INFO, "The symbol tags and information can be concise, as well.\n");
+ *      print_log(LOG_WARNING, "That was an info message. This is a warning message.\n");
+ *      print_log(LOG_ERROR, "And this is an error message.\n");
+ *      print_log(LOG_ERROR, "And this is a critical message.\n");
+ *      set_log_file("example.log");
+ *      print_log(LOG_INFO, "Logs can also be automatically printed to files.\n");
+ *
+ * Author: Henry Eshbaugh <henryeshbaugh@gmail.com>
+ * License: MIT
+ * Version: 1.0
+ */
+
+ int main(int argc, char *argv[])
+ {
+ 	if (argc != 2) return 1;
+	if (strcmp(argv[1], "depends") == 0) return 0;
+	return 1;
+ }

junkcode/henryeshbaugh@gmail.com-log/log.c

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+#include <log.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdbool.h>
+#include <stdarg.h>
+#include <time.h>
+
+// escape codes for different colors on the terminal
+#define FG_RED		"\033[31m"
+#define FG_YELLOW	"\033[33m"
+#define FG_BLUE		"\033[34m"
+#define FG_PURPLE	"\033[35m"
+#define TEXT_BOLD 	"\033[1m"
+#define COLOR_END	"\033[0m" // reset colors to default
+
+static FILE *_logging_files[16] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
+                             NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
+static int  _log_current_mode, _current_log_file = 1;
+
+FILE *set_log_file(char *filename)
+{
+	if (_current_log_file+1 > 16) return NULL; // we only support 16 different files
+	_logging_files[_current_log_file++] = fopen(filename, "a+");
+	return _logging_files[_current_log_file];
+}
+
+void set_log_mode(int mode)
+{
+	_log_current_mode = mode;
+}
+
+void get_log_mode()
+{
+	return _log_current_mode;
+}
+
+// this function is headache-inducing.
+void _print_log(int loglevel, char *file, const char *func, char *clock, int line, char *msg, ...)
+{
+	_logging_files[0] = stdout;
+	va_list args;
+	va_start(args, msg);
+	
+	// append the varargs to the buffer we want to print.
+	// this is so that our pipe chars don't get fucked later.
+	// also, make sure we don't get an invalid loglevel.
+	char buffer[strlen(msg) + 1024];
+	vsnprintf(buffer, strlen(msg)+1024, msg, args);	
+	if (loglevel < 0 || loglevel > 3) loglevel = LOG_INVALID;
+
+	// set console color for printing the tag
+	switch (loglevel) {
+		case LOG_CRITICAL:
+			printf(TEXT_BOLD FG_RED);
+			break;
+		case LOG_ERROR:
+			printf(FG_RED);
+			break;
+		case LOG_WARNING:
+			printf(FG_YELLOW);
+			break;
+		case LOG_INFO:
+			printf(FG_BLUE);
+			break;
+		case LOG_INVALID:
+			printf(FG_PURPLE);
+			break;
+	}
+	// print the log tag
+	int i;
+	for (i=0; i < 16; i++)
+		if (_logging_files[i])
+			fprintf(_logging_files[i], "%s", log_tags[_log_current_mode][loglevel]);
+		else break;
+	printf(COLOR_END);
+	
+	if (_log_current_mode == LOG_VERBOSE) {
+		for (i=0; i < 16; i++)
+			if (_logging_files[i])
+				fprintf(_logging_files[i],
+					"%s() (%s:%d) at %s |\t",
+					func, file, line, clock);
+			else break;
+	}
+
+	// print the first line
+	 char *to_print = strtok(buffer, "\n");
+	 for (i = 0; i < 16; i++)
+	 	if (_logging_files[i])
+	 		fprintf(_logging_files[i], "%s\n", to_print);
+		else break;
+
+	// for these next lines, add a pipe and tab once.
+	while (to_print = strtok(NULL, "\n")) {
+		for (i = 0; i < 16; i++)
+			if (_logging_files[i])
+				fprintf(_logging_files[i], "%s\n", to_print);
+			else break;
+	}
+}

junkcode/henryeshbaugh@gmail.com-log/log.h

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+#ifndef CCAN_LOG_H
+#define CCAN_LOG_H
+
+#include <stdio.h>
+#include <string.h>
+#include <stdbool.h>
+#include <stdarg.h>
+#include <time.h>
+
+#define LOG_CRITICAL 0
+#define LOG_ERROR    1
+#define LOG_WARNING  2
+#define LOG_INFO     3
+#define LOG_INVALID  4
+
+static 
+char *log_tags[2][5] = { { "[CRITICAL] ",
+		           "[ERROR]    ",
+		           "[WARNING]  ",
+		           "[INFO]     ", 
+		           "[INVALID LOG LEVEL] "},
+		       {   "[!] ",
+			   "[*] ",
+			   "[-] ",
+			   "[+] ",
+			   "[~] " }};
+
+#define LOG_VERBOSE 0
+#define LOG_CONCISE 1
+
+extern FILE *set_log_file(char *);
+extern int get_log_mode();
+extern void set_log_mode(int);
+
+#define print_log(level, ...) do {				\
+				time_t _clk = time(NULL);	\
+				_print_log(level, __FILE__, __func__, ctime(&_clk), __LINE__, __VA_ARGS__); \
+			     } while (0)
+
+extern void _print_log(int, char *, const char *, char*, int, char *, ...);
+#endif // CCAN_LOG_H