Create a pip package for pipe_io_server

pipe_io_server/clients/c_cpp/example.c

@@ -0,0 +1,29 @@
+ #include "pipe_io.h"
+
+
+void run2() {
+    pipe_io pipeio = pipeio_new_io("in", "out");
+    const char* line;
+    while ((line = pipeio_recv_msg(&pipeio.reader))) {
+        pipeio_send_msg(&pipeio.writer, line);
+    }
+    pipeio_close_io(&pipeio);
+}
+
+void msg_handler(const char* msg, void* ctx) {
+    pipe_writer* writer = (pipe_writer*)(ctx);
+    pipeio_send_msg(writer, msg);
+}
+
+void run1() {
+    pipe_io pipeio = pipeio_new_io("in", "out");
+    pipeio_set_msg_handler(&pipeio.reader, &msg_handler, &pipeio.writer);
+    pipeio_run(&pipeio.reader);
+    pipeio_close_io(&pipeio);
+}
+
+int main() {
+    run1();  // or run2();
+    // note that run1 and run2 do the same thing
+    // and you can use whichever API you prefer
+}

pipe_io_server/clients/c_cpp/example.cpp

@@ -0,0 +1,13 @@
+#include <iostream>
+#include <string>
+#include <fstream>
+#include "pipe_io.hpp"
+
+
+int main() {
+    PipeIO pipe_io("in", "out");
+    pipe_io.reader.set_message_handler(
+        [&pipe_io](std::string msg){pipe_io.writer.send_message(msg);}
+    );
+    pipe_io.reader.run();
+}

pipe_io_server/clients/c_cpp/pipe_io.h

@@ -0,0 +1,147 @@
+#pragma once
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+
+
+typedef struct pipe_reader {
+    FILE* stream;
+    char* line_buf;
+    size_t buf_size;
+    void (*msg_handler)(const char*, void*);
+    void* handler_ctx;
+} pipe_reader;
+
+static void null_handler(const char* msg, void* ctx) {}
+
+pipe_reader pipeio_new_reader(const char* pipe_path) {
+    pipe_reader preader;
+    preader.stream = fopen(pipe_path, "r");
+    preader.line_buf = NULL;
+    preader.buf_size = 0;
+    preader.msg_handler = &null_handler;
+    return preader;
+}
+
+bool pipeio_check_reader(const pipe_reader* preader) {
+    if (!preader || preader->stream == NULL) {
+        return false;
+    }
+    return true;
+}
+
+const char* pipeio_recv_msg(pipe_reader* preader) {
+    if (!pipeio_check_reader(preader)) {
+        return NULL;
+    }
+    ssize_t read = getline(&preader->line_buf, &preader->buf_size, preader->stream);
+    if (read > 0) {
+        preader->line_buf[read - 1] = '\0';
+        return preader->line_buf;
+    }
+    return NULL;
+}
+
+void pipeio_set_msg_handler(pipe_reader* preader, void (*msg_handler)(const char*, void*), void* handler_ctx) {
+    if (msg_handler != NULL && handler_ctx != NULL) {
+        preader->msg_handler = msg_handler;
+        preader->handler_ctx = handler_ctx;
+    }
+}
+
+void pipeio_run(pipe_reader* preader) {
+    const char* line;
+    while ((line = pipeio_recv_msg(preader))) {
+        (*preader->msg_handler)(line, preader->handler_ctx);
+    }
+}
+
+void pipeio_close_reader(pipe_reader* preader) {
+    if (!pipeio_check_reader(preader)) {
+        return;
+    }
+    fclose(preader->stream);
+    preader->stream = NULL;
+    if (preader->line_buf) {
+        free(preader->line_buf);
+        preader->line_buf = NULL;
+    }
+}
+
+
+typedef struct pipe_writer {
+    FILE* stream;
+} pipe_writer;
+
+pipe_writer pipeio_new_writer(const char* pipe_path) {
+    pipe_writer pwriter;
+    pwriter.stream = fopen(pipe_path, "w");
+    return pwriter;
+}
+
+bool pipeio_check_writer(const pipe_writer* pwriter) {
+    if (!pwriter || pwriter->stream == NULL) {
+        return false;
+    }
+    return true;
+}
+
+bool pipeio_send_msg(pipe_writer* pwriter, const char* msg) {
+    if (!pipeio_check_writer(pwriter)) {
+        return false;
+    }
+    fprintf(pwriter->stream, "%s\n", msg);
+    fflush(pwriter->stream);
+    return true;
+}
+
+void pipeio_close_writer(pipe_writer* pwriter) {
+    if (!pipeio_check_writer(pwriter)) {
+        return;
+    }
+    fclose(pwriter->stream);
+    pwriter->stream = NULL;
+}
+
+
+typedef struct pipe_io {
+    pipe_reader reader;
+    pipe_writer writer;
+} pipe_io;
+
+pipe_io pipeio_new_io(const char* in_pipe_path, const char* out_pipe_path) {
+    pipe_io pipeio;
+    pipeio.reader = pipeio_new_reader(in_pipe_path);
+    pipeio.writer = pipeio_new_writer(out_pipe_path);
+    return pipeio;
+}
+
+bool pipeio_check_io(const pipe_io* pipeio) {
+    if (!pipeio) {
+        return false;
+    }
+    return (pipeio_check_reader(&pipeio->reader) && pipeio_check_writer(&pipeio->writer));
+}
+
+void pipeio_close_io(pipe_io* pipeio) {
+    if (!pipeio_check_io(pipeio)) {
+        return;
+    }
+    pipeio_close_reader(&pipeio->reader);
+    pipeio_close_writer(&pipeio->writer);
+}
+
+// const char* recv_msg_pipe_io(pipe_io* pipeio) {
+//     if (!check_pipe_io(pipeio)) {
+//         return NULL;
+//     }
+//     return recv_msg_pipe_reader(&pipeio->preader);
+// }
+
+// bool send_msg_pipe_io(pipe_io* pipeio, const char* msg) {
+//     if (!check_pipe_io(pipeio)) {
+//         return false;
+//     }
+//     return send_msg_pipe_writer(&pipeio->pwriter, msg);
+// }

pipe_io_server/clients/c_cpp/pipe_io.hpp

@@ -0,0 +1,79 @@
+extern "C" {
+#include "pipe_io.h"
+}
+#include <string>
+#include <iostream>
+#include <functional>
+
+
+class PipeReader {
+public:
+    PipeReader(const std::string& pipe_path)
+    :preader(pipeio_new_reader(pipe_path.c_str())) {}
+
+    virtual ~PipeReader() {
+        pipeio_close_reader(&this->preader);
+    }
+
+    PipeReader(PipeReader&) = delete;
+    PipeReader(PipeReader&&) = delete;
+    PipeReader& operator=(const PipeReader&) = delete;
+    PipeReader& operator=(const PipeReader&&) = delete;
+
+    void set_message_handler(std::function<void(std::string)> message_handler) {
+        this->message_handler = message_handler;
+    }
+
+    void run() {
+        while (const char* linebuf = this->recv_message()) {
+            std::string msg(linebuf);
+            this->message_handler(msg);
+        }
+    }
+
+    const char* recv_message() {
+        return pipeio_recv_msg(&this->preader);
+    }
+
+private:
+    pipe_reader preader;
+    std::function<void(std::string)> message_handler = [](std::string){};
+};
+
+
+class PipeWriter {
+public:
+    PipeWriter(const std::string& pipe_path)
+    :pwriter(pipeio_new_writer(pipe_path.c_str())) {}
+
+    virtual ~PipeWriter() {
+        pipeio_close_writer(&this->pwriter);
+    }
+
+    PipeWriter(PipeReader&) = delete;
+    PipeWriter(PipeReader&&) = delete;
+    PipeWriter& operator=(const PipeReader&) = delete;
+    PipeWriter& operator=(const PipeReader&&) = delete;
+
+    void send_message(std::string msg) {
+        pipeio_send_msg(&this->pwriter, msg.c_str());
+    }
+
+private:
+    pipe_writer pwriter;
+};
+
+
+class PipeIO {
+public:
+    PipeReader reader;
+    PipeWriter writer;
+
+    PipeIO(const std::string& in_pipe_path, const std::string& out_pipe_path)
+    :reader(in_pipe_path), writer(out_pipe_path) {}
+
+    PipeIO(PipeReader&) = delete;
+    PipeIO(PipeReader&&) = delete;
+    PipeIO& operator=(const PipeReader&) = delete;
+    PipeIO& operator=(const PipeReader&&) = delete;
+};