remove total reliance on the c stdlib for journal.zig

src/journal/journal.h

@@ -8,9 +8,9 @@
 
 #define STREQ(a, b) strcmp(a, b) == 0
 
-FILE *journal_open(char *topic);
-void journal_write(FILE*, char* message);
-void journal_write_topic(FILE*, char *topic, char *message);
-void journal_close(FILE*);
+int journal_open(char *topic);
+void journal_write(int, char* message);
+void journal_write_topic(int, char *topic, char *message);
+void journal_close(int);
 
 #endif

src/journal/journal.zig

@@ -1,3 +1,6 @@
+const std = @import("std");
+const os = std.os;
+
 const c = @cImport({
     @cInclude("stdio.h");
     @cInclude("stdlib.h");
@@ -6,7 +9,6 @@ const c = @cImport({
     @cInclude("time.h");
 });
 
-const std = @import("std");
 const warn = std.debug.warn;
 const allocator = std.heap.c_allocator;
 
@@ -18,53 +20,97 @@ fn free_str(ptr: [*c]u8) void {
     c.free(@ptrCast(?*c_void, ptr));
 }
 
-export fn journal_open(topic: [*c]u8) [*c](c.FILE) {
-    var home_path: [*c]const u8 = c.getenv(c"HOME");
+export fn journal_open(topic_opt: [*c]u8) os.fd_t {
+    const topic_len = c.strlen(topic_opt);
+    const topic: []u8 = topic_opt[0..topic_len];
 
-    var journal_dir: [*c]u8 = alloc_str(512);
-    var journal_path: [*c]u8 = alloc_str(1024);
+    const journal_dir = std.fs.path.resolve(allocator, [_][]const u8{
+        std.os.getenvC(c"HOME").?,
+        ".lunabot",
+    }) catch |err| {
+        warn("failed to resolve paths: {}\n", err);
+        return -1;
+    };
 
-    _ = c.snprintf(journal_dir, c_ulong(512), c"%s/.lunabot", home_path);
+    warn("journal_dir = {}\n", journal_dir);
 
-    warn("uwu journal_dir = '{}'\n", journal_dir.*);
+    std.fs.makeDir(journal_dir) catch |err| {
+        if (err != error.PathAlreadyExists) {
+            warn("failed to create journal dir {}: {}\n", journal_dir, err);
+            return -1;
+        }
+    };
 
-    //c.mkdir(journal_dir, c.S_IRWXU | c.S_IRGRP | c.S_IROTH);
+    const journal_path = std.fmt.allocPrint(allocator, "{}/{}", journal_dir, topic) catch |err| {
+        warn("failed to allocprint journal path: {}\n", err);
+        return -1;
+    };
+    defer allocator.free(journal_path);
 
-    // taken off `zig translate-c`. this is cursed, i'm sorry.
-    _ = c.mkdir(journal_dir, c.__mode_t((((256 | 128) | 64) | (256 >> @import("std").math.Log2Int(c_int)(3))) | ((256 >> @import("std").math.Log2Int(c_int)(3)) >> @import("std").math.Log2Int(c_int)(3))));
+    warn("journal_path = {}\n", journal_path);
 
-    _ = c.snprintf(journal_path, c_ulong(1024), c"%s/%s", journal_dir, topic);
+    const fd = std.os.open(
+        journal_path,
+        std.os.O_WRONLY | std.os.O_CREAT | std.os.O_APPEND,
+        0o755,
+    ) catch |err| {
+        warn("failed to open {}: {}\n", journal_path, err);
+        return -1;
+    };
 
-    warn("journal_path = {}\n", journal_path.*);
-
-    var res: [*c](c.FILE) = c.fopen(journal_path, c"a");
-
-    free_str(journal_path);
-    free_str(journal_dir);
-
-    return res;
+    return fd;
 }
 
-export fn journal_write(journal: [*c]c.FILE, message: [*c]u8) void {
-    _ = c.fwrite(message, c.strlen(message), 1, journal);
+export fn journal_write(journal: os.fd_t, message: [*c]u8) void {
+    const msglen = c.strlen(message);
+
+    std.os.write(journal, message[0..msglen]) catch |err| {
+        std.debug.warn("Error while writing to file: {}\n", err);
+        return;
+    };
 }
 
-export fn journal_close(journal: [*c]c.FILE) void {
-    _ = c.fclose(journal);
+export fn journal_close(journal: os.fd_t) void {
+    std.os.close(journal);
 }
 
-export fn journal_write_topic(journal: *c.FILE, topic: [*c]u8, message: [*c]u8) void {
-    var tstamp: [*c]u8 = alloc_str(128);
-    var fmt_msg: [*c]u8 = alloc_str(128);
+export fn journal_write_topic(
+    journal: os.fd_t,
+    topic_opt: [*c]u8,
+    message_opt: [*c]u8,
+) void {
+    var topic = topic_opt[0..c.strlen(topic_opt)];
+    var message = message_opt[0..c.strlen(message_opt)];
+
+    var tstamp_cstr: [*c]u8 = alloc_str(128);
     var rawtime: c.time_t = undefined;
 
     _ = c.time(&rawtime);
     var cur_time: [*c]const c.struct_tm = c.gmtime(&rawtime);
+    _ = c.strftime(tstamp_cstr, usize(128), c"%c", cur_time);
 
-    _ = c.strftime(tstamp, usize(128), c"%c", cur_time);
-    _ = c.sprintf(fmt_msg, c"[%s] [%s]: %s\n", tstamp, topic, message);
+    var tstamp = tstamp_cstr[0..c.strlen(tstamp_cstr)];
 
-    free_str(tstamp);
+    std.debug.warn("tstamp: {}\ntopic: {}\nmsg: {}\n", tstamp, topic, message);
 
-    journal_write(journal, fmt_msg);
+    // catch unreachable is intended.
+    var fmt_msg = std.fmt.allocPrint(
+        allocator,
+        "[{}] [{}]: {}\n",
+        tstamp,
+        topic,
+        message,
+    ) catch |err| {
+        warn("Failed to make formatted message: {}\n", err);
+        return;
+    };
+
+    var fmt_msg_cstr = std.cstr.addNullByte(
+        allocator,
+        fmt_msg,
+    ) catch unreachable;
+
+    free_str(tstamp_cstr);
+
+    journal_write(journal, fmt_msg_cstr.ptr);
 }

src/journal/main.c

@@ -63,7 +63,7 @@ int main(int argc, char** argv)
 
     // default handling by journal_write_topic is marked
     // as the NULL values in this array.
-    void (*handlers[])(FILE*, char*) = {
+    void (*handlers[])(int, char*) = {
         NULL, NULL, NULL
     };
 
@@ -91,9 +91,13 @@ int main(int argc, char** argv)
 
         if(strcmp(topic, cur_topic) == 0)
         {
-            void (*fun_ptr)(FILE*, char*) = handlers[i];
+            void (*fun_ptr)(int, char*) = handlers[i];
 
-            FILE* journal_file = journal_open(topic);
+            int journal_file = journal_open(topic);
+            if(journal_file == -1) {
+                printf("failed to open journal file.\n");
+                return 1;
+            }
 
             char *handler_message = extract_handler_msg(argc, argv);
             printf("[%s] said '%s'\n", topic, handler_message);