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kant2002ForNeVeR
kant2002
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ForNeVeR
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Implement fopen, fgets, fclose, rewind, fseet, feof
1 parent 815bf9f commit 5e10296

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9 files changed

+451
-30
lines changed

9 files changed

+451
-30
lines changed

‎Cesium.Compiler/stdlib/stdio.h

+43
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,6 @@
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#pragma once
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#include <stdarg.h>
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#include <stddef.h>
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typedef void FILE;
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@@ -27,3 +28,45 @@ int putchar(char _Character);
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__cli_import("Cesium.Runtime.StdIoFunctions::PutC")
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int putc(char _Character, FILE* stream);
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__cli_import("Cesium.Runtime.StdIoFunctions::FGetC")
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int fgetc(FILE* stream);
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__cli_import("Cesium.Runtime.StdIoFunctions::FGetS")
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char* fgets(char* str, int count, FILE* stream);
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__cli_import("Cesium.Runtime.StdIoFunctions::FEof")
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int feof(FILE* stream);
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__cli_import("Cesium.Runtime.StdIoFunctions::FOpen")
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FILE* fopen(const char* filename, const char* mode);
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__cli_import("Cesium.Runtime.StdIoFunctions::FOpenS")
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errno_t fopen_s(FILE* * streamptr,
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const char* filename,
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const char* mode);
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__cli_import("Cesium.Runtime.StdIoFunctions::FClose")
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int fclose(FILE* stream);
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__cli_import("Cesium.Runtime.StdIoFunctions::Rewind")
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int rewind(FILE* stream);
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__cli_import("Cesium.Runtime.StdIoFunctions::FError")
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int ferror(FILE* stream);
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#define SEEK_SET 0
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#define SEEK_CUR 1
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#define SEEK_END 2
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#define EOF (-1)
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__cli_import("Cesium.Runtime.StdIoFunctions::FSeek")
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int fseek(FILE* stream, long offset, int origin);
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__cli_import("Cesium.Runtime.StdIoFunctions::PError")
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void perror(const char* s);
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__cli_import("Cesium.Runtime.StdIoFunctions::Remove")
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int remove(const char* pathname);

‎Cesium.Compiler/stdlib/string.h

+3
Original file line numberDiff line numberDiff line change
@@ -36,3 +36,6 @@ char* strdup(const char* src);
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__cli_import("Cesium.Runtime.StringFunctions::StrNDup")
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char* strndup(const char* src, size_t size);
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__cli_import("Cesium.Runtime.StringFunctions::StrError")
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char* strerror(int errnum);

‎Cesium.IntegrationTests/stdlib/io/fgets.c

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@@ -0,0 +1,20 @@
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#include <stdio.h>
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#include <stdlib.h>
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int main(void)
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{
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FILE* tmpf = fopen("fgets_unique_name.txt", "w+"); // or tmpnam(NULL);
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fputs("Alan Turing\n", tmpf);
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fputs("John von Neumann\n", tmpf);
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fputs("Alonzo Church\n", tmpf);
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rewind(tmpf);
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char buf[8];
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while (fgets(buf, sizeof buf, tmpf) != NULL)
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printf("\"%s\"\n", buf);
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if (feof(tmpf))
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puts("End of file reached");
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return 42;
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}

‎Cesium.IntegrationTests/stdlib/io/fopen.c

+31
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,31 @@
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#include <stdio.h>
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#include <stdlib.h>
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int main(void)
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{
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const char* fname = "unique_name.txt"; // or tmpnam(NULL);
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int is_ok = EXIT_FAILURE;
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FILE* fp = fopen(fname, "w+");
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if (!fp) {
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perror("File opening failed");
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return is_ok;
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}
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fputs("Hello, world!\n", fp);
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rewind(fp);
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int c; // note: int, not char, required to handle EOF
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while ((c = fgetc(fp)) != EOF) // standard C I/O file reading loop
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putchar(c);
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if (ferror(fp))
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puts("I/O error when reading");
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else if (feof(fp)) {
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puts("End of file is reached successfully");
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is_ok = 42;
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}
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fclose(fp);
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remove(fname);
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return is_ok;
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}

‎Cesium.Runtime/CesiumFunctions.cs

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@@ -1,5 +1,6 @@
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using System;
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using System.Runtime.InteropServices;
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using System.Text;
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namespace Cesium.Runtime;
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public static class CesiumFunctions
@@ -14,4 +15,48 @@ public static int GetOS()
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return 3;
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return 0;
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}
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internal static unsafe string? Unmarshal(byte* str)
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{
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#if NETSTANDARD
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Encoding encoding = Encoding.UTF8;
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int byteLength = 0;
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byte* search = str;
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while (*search != '\0')
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{
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byteLength++;
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search++;
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}
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int stringLength = encoding.GetCharCount(str, byteLength);
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string s = new('\0', stringLength);
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fixed (char* pTempChars = s)
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{
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encoding.GetChars(str, byteLength, pTempChars, stringLength);
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}
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return s;
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#else
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return Marshal.PtrToStringUTF8((nint)str);
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#endif
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}
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internal static unsafe UTF8String MarshalStr(string? str)
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{
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Encoding encoding = Encoding.UTF8;
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if (str is null)
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{
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return UTF8String.NullString;
50+
}
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var bytes = encoding.GetBytes(str);
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var storage = (byte*)StdLibFunctions.Malloc((nuint)bytes.Length + 1);
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for (var i = 0; i < bytes.Length; i++)
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{
56+
storage[i] = bytes[i];
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}
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storage[bytes.Length] = 0;
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return storage;
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}
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}

‎Cesium.Runtime/ErrNo.cs

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@@ -0,0 +1,50 @@
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using System;
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using System.Collections.Generic;
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using System.Text;
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namespace Cesium.Runtime;
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internal static class ErrNo
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{
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// Keep this file in sync with Cesium.Compiler/stdlib/errno.h
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public const int EPERM = 1;
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public const int ENOENT = 2;
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public const int ESRCH = 3;
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public const int EINTR = 4;
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public const int EIO = 5;
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public const int ENXIO = 6;
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public const int E2BIG = 7;
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public const int ENOEXEC = 8;
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public const int EBADF = 9;
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public const int ECHILD = 10;
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public const int EAGAIN = 11;
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public const int ENOMEM = 12;
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public const int EACCES = 13;
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public const int EFAULT = 14;
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public const int EBUSY = 16;
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public const int EEXIST = 17;
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public const int EXDEV = 18;
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public const int ENODEV = 19;
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public const int ENOTDIR = 20;
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public const int EISDIR = 21;
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public const int ENFILE = 23;
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public const int EMFILE = 24;
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public const int ENOTTY = 25;
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public const int EFBIG = 27;
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public const int ENOSPC = 28;
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public const int ESPIPE = 29;
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public const int EROFS = 30;
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public const int EMLINK = 31;
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public const int EPIPE = 32;
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public const int EDOM = 33;
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public const int EDEADLK = 36;
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public const int ENAMETOOLONG = 38;
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public const int ENOLCK = 39;
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public const int ENOSYS = 40;
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public const int ENOTEMPTY = 41;
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public const int EINVAL = 22;
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public const int ERANGE = 34;
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public const int EILSEQ = 42;
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public const int STRUNCATE = 80;
50+
}

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