generalization of syscalls

Common/Std/libc.c

@@ -1,8 +1,11 @@
 #include "../std.h"
+#include "../str.h"
 #include <assert.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <sys/socket.h>
+#include <sys/un.h>
 #include <tgmath.h>
 
 void *com_std_alloc(void *ptr, size_t size) {
@@ -19,3 +22,50 @@ double com_std_sqrt(double v) { return sqrt(v); }
 double com_std_fabs(double v) { return fabs(v); }
 double com_std_sin(double v) { return sin(v); }
 double com_std_cos(double v) { return cos(v); }
+
+com_std_fd com_std_open(char *path, uint32_t flags) {
+  com_std_assert(flags != 0);
+  char *mode = flags & COM_STD_OPEN_READ && flags & COM_STD_OPEN_WRITE ? "r+"
+               : flags & COM_STD_OPEN_READ                             ? "r"
+                                                                       : "w";
+  return fopen(path, mode);
+}
+
+bool com_std_write(com_std_fd fd, char *data, uint32_t bytes) {
+  com_std_assert(fd != NULL && data != NULL && bytes != 0);
+  bool s = fwrite(data, 1, bytes, fd) == bytes;
+  fflush(fd);
+  return s;
+}
+
+int32_t com_std_read(com_std_fd fd, char *data, uint32_t upto) {
+  com_std_assert(fd != NULL && data != NULL && upto != 0);
+  return fread(data, 1, upto, fd);
+}
+
+bool com_std_sfwd(com_std_fd fd, uint32_t bytes) {
+  com_std_assert(fd != NULL && bytes != 0);
+  return fseek(fd, bytes, SEEK_CUR) == 0;
+}
+
+com_std_fd com_std_socket(bool isnetwork) {
+  if (!isnetwork) {
+    int sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
+    return fdopen(sockfd, "w+b");
+  } else
+    return NULL;
+}
+
+bool com_std_connect(com_std_fd fd, bool isnetwork, char *address) {
+  com_std_assert(address != NULL);
+  if (!isnetwork) {
+    struct sockaddr_un addr = {.sun_family = AF_UNIX};
+    __builtin_memcpy(&addr.sun_path, address, com_str_ext_len(address));
+    return connect(fileno(fd), (struct sockaddr *)&addr, sizeof(addr)) == 0;
+  } else
+    return NULL;
+}
+
+void com_std_exit(uint32_t status) { exit(status); }
+
+void com_std_close(com_std_fd fd) { fclose(fd); }