XCode问题

Question

OS X Yosemite 10.10.5 XCode 7.2

我一直在阅读和试验整天，关于C中的宽字符/字符串，我仍然无法使其工作。

我正在尝试阅读仅由以下宽字符组成的文件：

んわらやま    (Japanese)

我想一次只读一个字符，立即写在另一个文件中。

int main(int argc, const char * argv[])
{
    FILE    *source, *dest;

    source = fopen( argv[1], "r");
    if (source == NULL) {
        printf ("could not open source file \n");
        exit (1);
    }

//  if [dest] does not exist it is created
    dest = fopen( argv[2], "w+");
    if (dest == NULL) {
        fclose(source);

        printf ("could not open dest file \n");
        exit (1);
    }
    fwide(source, 1);
    fwide(dest, 1);

    fileManipulator(source, dest);

    fclose(source);
    fclose(dest);

    return 0;
    }

void fileManipulator(FILE* source, FILE* dest)
{
    wint_t token;

    while ( WEOF != (token = getwc(source))) {
        manipulateToken(token, dest);
    }
}


void manipulateToken(wint_t token, FILE* dest)
{
    char* pre = "- ";
    char* post= " -\n";

    if ( EOF == fputs(pre, dest))
    {
//      error handling
    }
    if ( WEOF == fputwc(token, dest))
    {
//      error handling
    }
    if ( EOF == fputs(post, dest))
    {
//      error handling
    }
}

这是输出：

- „ -
- Ç -
- ì -
- „ -
- Ç -
- è -
- „ -
- Ç -
- â -
- „ -
- Ç -
- Ñ -
- „ -
- Å -
- æ -

我可以理解我的问题可能是关于我如何阅读数据，但如果我考虑替代方案，我就完全陷入了困境。

我尝试过使用 fgetws ，但我无法将字符彼此分开;
我尝试将 fwscanf 与％ls 一起使用，但我最终得到一个空文件;
我注意到MAC OS不提供 fgetwc 实现，即使相对手册页提到它，AFAIK getwc 应该是 fgetwc <的宏实现/强>

不确定这是否重要，但我使用触摸命令创建了源文件;

你可以帮帮我吗？

PS：关于该论点的进一步阅读的链接也非常受欢迎。有关此事的文件很少。

XCode问题

这个问题最初让我觉得 Jonathan Leffler 解决方案无效。事实上，如果我通过XCode CMD + R 或通过终端运行代码，代码会产生不同的输出。

AFAIK问题必须是XCode在运行时使用的某种属性/属性/设置，因为硬编码源和 dest < / em> 参数仍会产生错误的输出。

为了清楚起见，我为我的代码提供了导出的方案：

<?xml version="1.0" encoding="UTF-8"?> <Scheme LastUpgradeVersion = "0720" version = "1.3"> <BuildAction parallelizeBuildables = "YES" buildImplicitDependencies = "YES"> <BuildActionEntries> <BuildActionEntry buildForTesting = "YES" buildForRunning = "YES" buildForProfiling = "YES" buildForArchiving = "YES" buildForAnalyzing = "YES"> <BuildableReference BuildableIdentifier = "primary" BlueprintIdentifier = "DA36663A1CCF4F8200615958" BuildableName = "FileManipulator" BlueprintName = "FileManipulator" ReferencedContainer = "container:FileManipulator.xcodeproj"> </BuildableReference> </BuildActionEntry> </BuildActionEntries> </BuildAction> <TestAction buildConfiguration = "Debug" selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB" selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB" shouldUseLaunchSchemeArgsEnv = "YES"> <Testables> </Testables> <MacroExpansion> <BuildableReference BuildableIdentifier = "primary" BlueprintIdentifier = "DA36663A1CCF4F8200615958" BuildableName = "FileManipulator" BlueprintName = "FileManipulator" ReferencedContainer = "container:FileManipulator.xcodeproj"> </BuildableReference> </MacroExpansion> <AdditionalOptions> </AdditionalOptions> </TestAction> <LaunchAction buildConfiguration = "Debug" selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB" selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB" launchStyle = "0" useCustomWorkingDirectory = "NO" ignoresPersistentStateOnLaunch = "NO" debugDocumentVersioning = "YES" enableAddressSanitizer = "YES" debugServiceExtension = "internal" allowLocationSimulation = "YES"> <BuildableProductRunnable runnableDebuggingMode = "0"> <BuildableReference BuildableIdentifier = "primary" BlueprintIdentifier = "DA36663A1CCF4F8200615958" BuildableName = "FileManipulator" BlueprintName = "FileManipulator" ReferencedContainer = "container:FileManipulator.xcodeproj"> </BuildableReference> </BuildableProductRunnable> <CommandLineArguments> <CommandLineArgument argument = "/Users/Paul/TestDirectory/Source.txt" isEnabled = "YES"> </CommandLineArgument> <CommandLineArgument argument = "/Users/Paul/TestDirectory/Destination.txt" isEnabled = "YES"> </CommandLineArgument> </CommandLineArguments> <AdditionalOptions> <AdditionalOption key = "NSZombieEnabled" value = "YES" isEnabled = "YES"> </AdditionalOption> <AdditionalOption key = "NSDOLoggingEnabled" value = "YES" isEnabled = "YES"> </AdditionalOption> </AdditionalOptions> </LaunchAction> <ProfileAction buildConfiguration = "Release" shouldUseLaunchSchemeArgsEnv = "YES" savedToolIdentifier = "" useCustomWorkingDirectory = "NO" debugDocumentVersioning = "YES"> <BuildableProductRunnable runnableDebuggingMode = "0"> <BuildableReference BuildableIdentifier = "primary" BlueprintIdentifier = "DA36663A1CCF4F8200615958" BuildableName = "FileManipulator" BlueprintName = "FileManipulator" ReferencedContainer = "container:FileManipulator.xcodeproj"> </BuildableReference> </BuildableProductRunnable> </ProfileAction> <AnalyzeAction buildConfiguration = "Debug"> </AnalyzeAction> <ArchiveAction buildConfiguration = "Release" revealArchiveInOrganizer = "YES"> </ArchiveAction> </Scheme>

Answer 1

此代码似乎有效。你可能不应该使用fputs()和缩小字符串;您应该使用fputws()和宽字符串：L"- "。注意使用setlocale();这是至关重要的（尝试省略它，看看你得到了什么）。

#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <wchar.h>

static void fileManipulator(FILE *source, FILE *dest);
static void manipulateToken(wint_t token, FILE *dest);

int main(int argc, const char *argv[])
{
    FILE    *source, *dest;
    if (argc != 3)
    {
        fprintf(stderr, "Usage: %s input output\n", argv[0]);
        exit(1);
    }

    setlocale(LC_ALL, "");

    source = fopen(argv[1], "r");
    if (source == NULL)
    {
        fprintf(stderr, "could not open source file %s\n", argv[1]);
        exit(1);
    }

    dest = fopen(argv[2], "w+");
    if (dest == NULL)
    {
        fclose(source);
        fprintf(stderr, "could not open dest file %s\n", argv[2]);
        exit(1);
    }

    fwide(source, 1);
    fwide(dest, 1);

    fileManipulator(source, dest);

    fclose(source);
    fclose(dest);

    return 0;
}

static void fileManipulator(FILE *source, FILE *dest)
{
    wint_t token;

    while (WEOF != (token = getwc(source)))
    {
        manipulateToken(token, dest);
    }
}

static void manipulateToken(wint_t token, FILE *dest)
{
    wchar_t *pre = L"- ";
    wchar_t *post = L" -\n";

    if (EOF == fputws(pre, dest))
    {
        fprintf(stderr, "Failed to write prefix string\n");
        exit(1);
    }
    if (WEOF == fputwc(token, dest))
    {
        fprintf(stderr, "Failed to write wide character %d\n", (int)token);
        exit(1);
    }
    if (EOF == fputws(post, dest))
    {
        fprintf(stderr, "Failed to write suffix string\n");
        exit(1);
    }
}

给定一个文件data，其中包含：

$ cat data
んわらやま
$ odx data
0x0000: E3 82 93 E3 82 8F E3 82 89 E3 82 84 E3 81 BE 0A   ................
0x0010:
$

（你没有odx，因为我写了它，但xxd -g 1 data产生或多或少的等效输出。）我运行程序（称为x37），如下所示：

$ x37 data output
$ cat output
- ん -
- わ -
- ら -
- や -
- ま -
- 
 -
$ odx output
0x0000: 2D 20 E3 82 93 20 2D 0A 2D 20 E3 82 8F 20 2D 0A   - ... -.- ... -.
0x0010: 2D 20 E3 82 89 20 2D 0A 2D 20 E3 82 84 20 2D 0A   - ... -.- ... -.
0x0020: 2D 20 E3 81 BE 20 2D 0A 2D 20 0A 20 2D 0A         - ... -.- . -.
0x002E:
$

使用GCC（5.3.0，自制）和Clang（Apple LLVM版本7.3.0（clang-703.0.29））在Mac OS X 10.11.4上进行测试。

根据工作代码，您可以尝试查找哪些更改至关重要。我还创建了使用单行调用报告错误的函数，而不是每个错误需要写3行或4行。（实际上＆＃39;使用＆＃39;比创建＆＃39;更合适 - 我很久以前创建了这样一组函数，并且不断使用它们。）

在C中正确操作宽字符/字符串

XCode问题

1 个答案: