John Alanbrook
c87f85cf6c
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234 lines
6.8 KiB
C
234 lines
6.8 KiB
C
#include "qjs_fd.h"
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#include "qjs_blob.h"
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#include "jsffi.h"
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <stdio.h>
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#ifdef _WIN32
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#include <io.h>
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#include <direct.h>
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#define mkdir(path, mode) _mkdir(path)
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#define rmdir _rmdir
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#define getcwd _getcwd
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#define PATH_MAX _MAX_PATH
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#define fsync(fd) _commit(fd)
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#define S_ISLNK(m) 0
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#define S_ISSOCK(m) 0
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#else
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#include <unistd.h>
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#include <dirent.h>
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#endif
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// Helper to convert JS value to file descriptor
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static int js2fd(JSContext *ctx, JSValueConst val)
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{
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int fd;
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if (JS_ToInt32(ctx, &fd, val) < 0) {
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JS_ThrowTypeError(ctx, "Expected file descriptor number");
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return -1;
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}
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return fd;
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}
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// Helper function for writing
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static ssize_t js_fd_write_helper(JSContext *js, int fd, JSValue val)
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{
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size_t len;
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ssize_t wrote;
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if (JS_IsString(val)) {
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const char *data = JS_ToCStringLen(js, &len, val);
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wrote = write(fd, data, len);
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JS_FreeCString(js, data);
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} else {
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unsigned char *data = js_get_blob_data(js, &len, val);
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wrote = write(fd, data, len);
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}
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return wrote;
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}
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// POSIX FILE DESCRIPTOR FUNCTIONS
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JSC_SCALL(fd_open,
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int flags = O_RDWR | O_CREAT;
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mode_t mode = 0644;
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// Parse optional flags argument
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if (argc > 1 && JS_IsString(argv[1])) {
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const char *flag_str = JS_ToCString(js, argv[1]);
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flags = 0;
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if (strchr(flag_str, 'r')) flags |= O_RDONLY;
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if (strchr(flag_str, 'w')) flags |= O_WRONLY | O_CREAT | O_TRUNC;
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if (strchr(flag_str, 'a')) flags |= O_WRONLY | O_CREAT | O_APPEND;
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if (strchr(flag_str, '+')) {
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flags &= ~(O_RDONLY | O_WRONLY);
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flags |= O_RDWR;
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}
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JS_FreeCString(js, flag_str);
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}
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int fd = open(str, flags, mode);
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if (fd < 0)
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ret = JS_ThrowReferenceError(js, "open failed: %s", strerror(errno));
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else
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ret = JS_NewInt32(js, fd);
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)
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JSC_CCALL(fd_write,
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int fd = js2fd(js, argv[0]);
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if (fd < 0) return JS_EXCEPTION;
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ssize_t wrote = js_fd_write_helper(js, fd, argv[1]);
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if (wrote < 0)
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return JS_ThrowReferenceError(js, "write failed: %s", strerror(errno));
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return JS_NewInt64(js, wrote);
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)
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JSC_CCALL(fd_read,
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int fd = js2fd(js, argv[0]);
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if (fd < 0) return JS_EXCEPTION;
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size_t size = 4096;
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if (argc > 1)
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size = js2number(js, argv[1]);
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void *buf = malloc(size);
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if (!buf)
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return JS_ThrowReferenceError(js, "malloc failed");
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ssize_t bytes_read = read(fd, buf, size);
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if (bytes_read < 0) {
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free(buf);
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return JS_ThrowReferenceError(js, "read failed: %s", strerror(errno));
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}
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ret = js_new_blob_stoned_copy(js, buf, bytes_read);
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free(buf);
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return ret;
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)
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JSC_CCALL(fd_lseek,
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int fd = js2fd(js, argv[0]);
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if (fd < 0) return JS_EXCEPTION;
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off_t offset = js2number(js, argv[1]);
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int whence = SEEK_SET;
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if (argc > 2) {
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const char *whence_str = JS_ToCString(js, argv[2]);
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if (strcmp(whence_str, "cur") == 0) whence = SEEK_CUR;
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else if (strcmp(whence_str, "end") == 0) whence = SEEK_END;
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JS_FreeCString(js, whence_str);
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}
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off_t new_pos = lseek(fd, offset, whence);
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if (new_pos < 0)
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return JS_ThrowReferenceError(js, "lseek failed: %s", strerror(errno));
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return JS_NewInt64(js, new_pos);
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)
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JSC_CCALL(fd_getcwd,
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char buf[PATH_MAX];
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if (getcwd(buf, sizeof(buf)) == NULL)
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return JS_ThrowReferenceError(js, "getcwd failed: %s", strerror(errno));
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return JS_NewString(js, buf);
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)
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JSC_SCALL(fd_rmdir,
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if (rmdir(str) != 0)
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ret = JS_ThrowReferenceError(js, "could not remove directory %s: %s", str, strerror(errno));
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)
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JSC_SCALL(fd_mkdir,
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if (mkdir(str, 0755) != 0)
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ret = JS_ThrowReferenceError(js, "could not make directory %s: %s", str, strerror(errno));
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)
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JSC_CCALL(fd_fsync,
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int fd = js2fd(js, argv[0]);
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if (fd < 0) return JS_EXCEPTION;
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if (fsync(fd) != 0)
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return JS_ThrowReferenceError(js, "fsync failed: %s", strerror(errno));
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return JS_NULL;
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)
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JSC_CCALL(fd_close,
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int fd = js2fd(js, argv[0]);
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if (fd < 0) return JS_EXCEPTION;
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if (close(fd) != 0)
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return JS_ThrowReferenceError(js, "close failed: %s", strerror(errno));
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return JS_NULL;
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)
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JSC_CCALL(fd_fstat,
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int fd = js2fd(js, argv[0]);
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if (fd < 0) return JS_EXCEPTION;
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struct stat st;
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if (fstat(fd, &st) != 0)
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return JS_ThrowReferenceError(js, "fstat failed: %s", strerror(errno));
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JSValue obj = JS_NewObject(js);
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JS_SetPropertyStr(js, obj, "size", JS_NewInt64(js, st.st_size));
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JS_SetPropertyStr(js, obj, "mode", JS_NewInt32(js, st.st_mode));
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JS_SetPropertyStr(js, obj, "uid", JS_NewInt32(js, st.st_uid));
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JS_SetPropertyStr(js, obj, "gid", JS_NewInt32(js, st.st_gid));
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JS_SetPropertyStr(js, obj, "atime", JS_NewInt64(js, st.st_atime));
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JS_SetPropertyStr(js, obj, "mtime", JS_NewInt64(js, st.st_mtime));
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JS_SetPropertyStr(js, obj, "ctime", JS_NewInt64(js, st.st_ctime));
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JS_SetPropertyStr(js, obj, "nlink", JS_NewInt32(js, st.st_nlink));
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JS_SetPropertyStr(js, obj, "ino", JS_NewInt64(js, st.st_ino));
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JS_SetPropertyStr(js, obj, "dev", JS_NewInt32(js, st.st_dev));
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JS_SetPropertyStr(js, obj, "rdev", JS_NewInt32(js, st.st_rdev));
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#ifndef _WIN32
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JS_SetPropertyStr(js, obj, "blksize", JS_NewInt32(js, st.st_blksize));
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JS_SetPropertyStr(js, obj, "blocks", JS_NewInt64(js, st.st_blocks));
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#else
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JS_SetPropertyStr(js, obj, "blksize", JS_NewInt32(js, 4096));
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JS_SetPropertyStr(js, obj, "blocks", JS_NewInt64(js, st.st_size / 512));
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#endif
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// Add boolean properties for file type
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JS_SetPropertyStr(js, obj, "isFile", JS_NewBool(js, S_ISREG(st.st_mode)));
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JS_SetPropertyStr(js, obj, "isDirectory", JS_NewBool(js, S_ISDIR(st.st_mode)));
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JS_SetPropertyStr(js, obj, "isSymlink", JS_NewBool(js, S_ISLNK(st.st_mode)));
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JS_SetPropertyStr(js, obj, "isFIFO", JS_NewBool(js, S_ISFIFO(st.st_mode)));
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JS_SetPropertyStr(js, obj, "isSocket", JS_NewBool(js, S_ISSOCK(st.st_mode)));
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JS_SetPropertyStr(js, obj, "isCharDevice", JS_NewBool(js, S_ISCHR(st.st_mode)));
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JS_SetPropertyStr(js, obj, "isBlockDevice", JS_NewBool(js, S_ISBLK(st.st_mode)));
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return obj;
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)
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static const JSCFunctionListEntry js_fd_funcs[] = {
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MIST_FUNC_DEF(fd, open, 2),
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MIST_FUNC_DEF(fd, write, 2),
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MIST_FUNC_DEF(fd, read, 2),
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MIST_FUNC_DEF(fd, lseek, 3),
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MIST_FUNC_DEF(fd, getcwd, 0),
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MIST_FUNC_DEF(fd, rmdir, 1),
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MIST_FUNC_DEF(fd, mkdir, 1),
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MIST_FUNC_DEF(fd, fsync, 1),
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MIST_FUNC_DEF(fd, close, 1),
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MIST_FUNC_DEF(fd, fstat, 1),
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};
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JSValue js_fd_use(JSContext *js) {
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JSValue mod = JS_NewObject(js);
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JS_SetPropertyFunctionList(js, mod, js_fd_funcs, countof(js_fd_funcs));
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return mod;
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} |