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Implement dir read/free and file write in Unix

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This commit is contained in:
Doyle 2017-06-21 18:52:14 +10:00
parent 245e6b11f1
commit a067fed81f
2 changed files with 188 additions and 104 deletions
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283
dqn.h
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@ -817,6 +817,8 @@ DQN_FILE_SCOPE i32 DqnRnd_PCGRange(DqnRandPCGState *pcg, i32 min, i32 max);
#ifdef DQN_UNIX_PLATFORM
#include <sys/stat.h>
#include <stdio.h> // Basic File I/O
#include <dirent.h> // readdir()/opendir()/closedir()
#endif
////////////////////////////////////////////////////////////////////////////////
@ -856,7 +858,7 @@ typedef struct DqnFile
DQN_FILE_SCOPE bool DqnFile_Open (const char *const path, DqnFile *const file, const u32 permissionFlags, const enum DqnFileAction action);
DQN_FILE_SCOPE bool DqnFile_OpenW(const wchar_t *const path, DqnFile *const file, const u32 permissionFlags, const enum DqnFileAction action);
// File offset is the byte offset to starting writing from
DQN_FILE_SCOPE size_t DqnFile_Write(const DqnFile *const file, const u8 *const buffer, const size_t numBytesToWrite, const size_t fileOffset);
DQN_FILE_SCOPE size_t DqnFile_Write(const DqnFile *const file, u8 *const buffer, const size_t numBytesToWrite, const size_t fileOffset);
// Return the number of bytes read
DQN_FILE_SCOPE size_t DqnFile_Read (const DqnFile file, u8 *const buffer, const size_t numBytesToRead);
@ -1477,7 +1479,7 @@ STBSP__PUBLICDEF void STB_SPRINTF_DECORATE(set_separators)(char comma, char peri
////////////////////////////////////////////////////////////////////////////////
#include <math.h> // TODO(doyle): For trigonometry functions (for now)
#include <stdlib.h> // For calloc, malloc, free
#include <stdio.h> // For printf, portable file io
#include <stdio.h> // For printf
#include <x86intrin.h> // __rdtsc
// NOTE: STB_SPRINTF is included when DQN_IMPLEMENTATION defined
@ -3593,6 +3595,102 @@ FILE_SCOPE bool DqnFileInternal_Win32OpenW(const wchar_t *const path,
file->permissionFlags = permissionFlags;
return true;
}
DQN_FILE_SCOPE char **DqnDirInternal_PlatformRead(const char *const dir,
u32 *const numFiles)
{
if (!dir || !numFiles) return NULL;
u32 currNumFiles = 0;
wchar_t wideDir[MAX_PATH] = {0};
DqnWin32_UTF8ToWChar(dir, wideDir, DQN_ARRAY_COUNT(wideDir));
// Enumerate number of files first
{
WIN32_FIND_DATAW findData = {0};
HANDLE findHandle = FindFirstFileW(wideDir, &findData);
if (findHandle == INVALID_HANDLE_VALUE)
{
DQN_WIN32_ERROR_BOX("FindFirstFile() failed.", NULL);
return NULL;
}
bool stayInLoop = true;
while (stayInLoop)
{
BOOL result = FindNextFileW(findHandle, &findData);
if (result == 0)
{
DWORD error = GetLastError();
if (error != ERROR_NO_MORE_FILES)
{
DqnWin32_DisplayErrorCode(error,
"FindNextFileW() failed");
}
stayInLoop = false;
}
else
{
currNumFiles++;
}
}
FindClose(findHandle);
}
if (currNumFiles == 0)
{
*numFiles = 0;
return NULL;
}
{
WIN32_FIND_DATAW initFind = {0};
HANDLE findHandle = FindFirstFileW(wideDir, &initFind);
if (findHandle == INVALID_HANDLE_VALUE)
{
DQN_WIN32_ERROR_BOX("FindFirstFile() failed.", NULL);
*numFiles = 0;
return NULL;
}
char **list = (char **)DqnMem_Calloc(
sizeof(*list) * (currNumFiles));
if (!list)
{
DQN_WIN32_ERROR_BOX("DqnMem_Alloc() failed.", NULL);
*numFiles = 0;
return NULL;
}
for (u32 i = 0; i < currNumFiles; i++)
{
list[i] = (char *)DqnMem_Calloc(sizeof(**list) * MAX_PATH);
if (!list[i])
{
for (u32 j = 0; j < i; j++)
DqnMem_Free(list[j]);
DQN_WIN32_ERROR_BOX("DqnMem_Alloc() failed.", NULL);
*numFiles = 0;
return NULL;
}
}
i32 listIndex = 0;
WIN32_FIND_DATAW findData = {0};
while (FindNextFileW(findHandle, &findData) != 0)
{
DqnWin32_WCharToUTF8(findData.cFileName, list[listIndex++],
MAX_PATH);
}
*numFiles = currNumFiles;
FindClose(findHandle);
return list;
}
}
#endif // DQN_WIN32_PLATFORM
#ifdef DQN_UNIX_PLATFORM
@ -3662,7 +3760,75 @@ FILE_SCOPE bool DqnFileInternal_UnixOpen(const char *const path,
return true;
}
#endif
DQN_FILE_SCOPE char **DqnDirInternal_PlatformRead(const char *const dir,
u32 *const numFiles)
{
if (!dir || !numFiles) return NULL;
// Enumerate num files
u32 currNumFiles = 0;
{
DIR *const dirHandle = opendir(dir);
if (!dirHandle) return NULL;
struct dirent *dirFile = readdir(dirHandle);
while (dirFile)
{
currNumFiles++;
dirFile = readdir(dirHandle);
}
closedir(dirHandle);
}
if (currNumFiles == 0)
{
*numFiles = 0;
return NULL;
}
// Create file list
{
DIR *const dirHandle = opendir(dir);
if (!dirHandle) return NULL;
char **list = (char **)DqnMem_Calloc(sizeof(*list) * currNumFiles);
if (!list)
{
// TODO(doyle): Logging
DQN_ASSERT(DQN_INVALID_CODE_PATH);
*numFiles = 0;
return NULL;
}
struct dirent *dirFile = readdir(dirHandle);
for (u32 i = 0; i < currNumFiles; i++)
{
list[i] = (char *)DqnMem_Calloc(sizeof(**list) *
DQN_ARRAY_COUNT(dirFile->d_name));
if (!list[i])
{
for (u32 j = 0; j < i; j++) DqnMem_Free(list[j]);
// TODO(doyle): Logging
*numFiles = 0;
return NULL;
}
}
u32 listIndex = 0;
*numFiles = currNumFiles;
while (dirFile)
{
DqnStr_Copy(list[listIndex++], dirFile->d_name, DQN_ARRAY_COUNT(dirFile->d_name));
dirFile = readdir(dirHandle);
}
closedir(dirHandle);
return list;
}
}
#endif // DQN_UNIX_PLATFORM
////////////////////////////////////////////////////////////////////////////////
// DqnFile Implementation
@ -3703,7 +3869,7 @@ bool DqnFile_OpenW(const wchar_t *const path, DqnFile *const file, const u32 per
}
DQN_FILE_SCOPE size_t DqnFile_Write(const DqnFile *const file,
const u8 *const buffer,
u8 *const buffer,
const size_t numBytesToWrite,
const size_t fileOffset)
{
@ -3712,7 +3878,7 @@ DQN_FILE_SCOPE size_t DqnFile_Write(const DqnFile *const file,
if (DQN_ASSERT_MSG(fileOffset != 0, "'fileOffset' not implemented yet")) return 0;
if (!file || !buffer) return numBytesToWrite;
#ifdef DQN_WIN32_PLATFORM
#if defined(DQN_WIN32_PLATFORM)
DWORD bytesToWrite = (DWORD)numBytesToWrite;
DWORD bytesWritten;
BOOL result =
@ -3725,8 +3891,14 @@ DQN_FILE_SCOPE size_t DqnFile_Write(const DqnFile *const file,
DQN_WIN32_ERROR_BOX("ReadFile() failed.", NULL);
}
#else
DQN_ASSERT_MSG(DQN_INVALID_CODE_PATH, "Non Win32 path not implemented");
#elif defined(DQN_UNIX_PLATFORM)
const size_t ITEMS_TO_WRITE = 1;
if (fwrite(buffer, numBytesToWrite, ITEMS_TO_WRITE, (FILE *)file->handle) ==
ITEMS_TO_WRITE)
{
rewind((FILE *)file->handle);
numBytesWritten = ITEMS_TO_WRITE * numBytesToWrite;
}
#endif
return numBytesWritten;
@ -3790,101 +3962,8 @@ DQN_FILE_SCOPE void DqnFile_Close(DqnFile *const file)
DQN_FILE_SCOPE char **DqnDir_Read(const char *const dir, u32 *const numFiles)
{
if (!dir) return NULL;
#ifdef DQN_WIN32_PLATFORM
u32 currNumFiles = 0;
wchar_t wideDir[MAX_PATH] = {0};
DqnWin32_UTF8ToWChar(dir, wideDir, DQN_ARRAY_COUNT(wideDir));
// Enumerate number of files first
{
WIN32_FIND_DATAW findData = {0};
HANDLE findHandle = FindFirstFileW(wideDir, &findData);
if (findHandle == INVALID_HANDLE_VALUE)
{
DQN_WIN32_ERROR_BOX("FindFirstFile() failed.", NULL);
return NULL;
}
bool stayInLoop = true;
while (stayInLoop)
{
BOOL result = FindNextFileW(findHandle, &findData);
if (result == 0)
{
DWORD error = GetLastError();
if (error != ERROR_NO_MORE_FILES)
{
DqnWin32_DisplayErrorCode(error,
"FindNextFileW() failed");
}
stayInLoop = false;
}
else
{
currNumFiles++;
}
}
FindClose(findHandle);
}
if (currNumFiles == 0)
{
*numFiles = 0;
return NULL;
}
{
WIN32_FIND_DATAW initFind = {0};
HANDLE findHandle = FindFirstFileW(wideDir, &initFind);
if (findHandle == INVALID_HANDLE_VALUE)
{
DQN_WIN32_ERROR_BOX("FindFirstFile() failed.", NULL);
return NULL;
}
char **list = (char **)DqnMem_Calloc(
sizeof(*list) * (currNumFiles));
if (!list)
{
DQN_WIN32_ERROR_BOX("DqnMem_Alloc() failed.", NULL);
return NULL;
}
for (u32 i = 0; i < currNumFiles; i++)
{
list[i] =
(char *)DqnMem_Calloc(sizeof(**list) * MAX_PATH);
if (!list[i])
{
for (u32 j = 0; j < i; j++)
{
DqnMem_Free(list[j]);
}
DQN_WIN32_ERROR_BOX("DqnMem_Alloc() failed.", NULL);
return NULL;
}
}
i32 listIndex = 0;
WIN32_FIND_DATAW findData = {0};
while (FindNextFileW(findHandle, &findData) != 0)
{
DqnWin32_WCharToUTF8(findData.cFileName, list[listIndex++],
MAX_PATH);
}
*numFiles = currNumFiles;
FindClose(findHandle);
return list;
}
#else
return NULL;
#endif
char **result = DqnDirInternal_PlatformRead(dir, numFiles);
return result;
}
DQN_FILE_SCOPE void DqnDir_ReadFree(char **fileList, u32 numFiles)

9
dqn_unit_test.cpp
View File

@ -1481,13 +1481,18 @@ void FileTest()
DQN_ASSERT(!file.handle);
printf("FileTest(): FileIO: Completed successfully\n");
}
// TODO(doyle): Write tests for writing out to file
}
{
u32 numFiles;
char **filelist = DqnDir_Read("*", &numFiles);
#if defined(DQN_UNIX_IMPLEMENTATION)
char **filelist = DqnDir_Read(".", &numFiles);
#elif defined(DQN_WIN32_IMPLEMENTATION)
char **filelist = DqnDir_Read("*", &numFiles);
#endif
printf("FileTest(): DirRead: Display read files\n");
for (u32 i = 0; i < numFiles; i++)
printf("FileTest(): DirRead: %s\n", filelist[i]);