files.c

#include "files.h"

char* getDirName(const char* filePath)
{
	char* lastSlash = strrchr(filePath, '/');
	if (lastSlash == NULL)
		return NULL;

	char* tmp = malloc( (strlen(filePath)+1)*sizeof(char) );

	unsigned int i;
	for (i=0; &filePath[i]!=lastSlash+1 && filePath[i]!='\0'; i++)
		tmp[i] = filePath[i];
	tmp[i] = '\0';

	char* dirName = malloc( (strlen(tmp)+1)*sizeof(char) );
	strcpy(dirName, tmp);
	free(tmp);

	return dirName;
}

char* getBaseName(const char* filePath)
{
	char* lastSlash = strrchr(filePath, '/');
	if (lastSlash == NULL)
		return NULL;

	char* baseName = malloc( strlen(lastSlash)*sizeof(char) );
	strcpy(baseName, lastSlash+1);

	return baseName;
}

char* getOutputNameFromInputName(const char* inputFileName)
{
	if (inputFileName == NULL)
	{
		WARNING_FUNC("getOutputNameFromInputName", "Tried to get output file name from input file name while input file name wasn't set");
		return NULL;
	}
	char* outputFileName;

	unsigned short inputLength = strlen(inputFileName);
	if (inputLength <= 3)
	{
		outputFileName = malloc( (inputLength+1)*sizeof(char) );
		strcpy(outputFileName, inputFileName);
		return outputFileName;
	}

	if (inputFileName[inputLength-4] == '.')
	{
		outputFileName = malloc( (inputLength-3)*sizeof(char) );
		strncpy(outputFileName, inputFileName, inputLength-4);
		outputFileName[inputLength-4] = '\0';
		return outputFileName;
	}

	outputFileName = malloc( (inputLength+1)*sizeof(char) );
	strcpy(outputFileName, inputFileName);
	return outputFileName;
}

char* addLmdExtension(const char* fileName)
{
	char* answer;
	unsigned short length = strlen(fileName);
	if (fileName[length-4] == '.' && fileName[length-3] == 'l' && fileName[length-2] == 'm' && fileName[length-1] == 'd')
		return (char*) fileName;//cast removes compiler warning

	answer = malloc( (length+5)*sizeof(char) );
	strcpy(answer, fileName);

	answer[length] = '.';
	answer[length+1] = 'l';
	answer[length+2] = 'm';
	answer[length+3] = 'd';
	answer[length+4] = '\0';

	return answer;
}

char* addTexExtension(const char* fileName)
{
	if (fileName == NULL || strcmp(fileName, "") == 0)
	{
		ERROR_MSG("addTexExtension", "Tried to add extension to empty file name");
		return NULL;
	}

	unsigned short fileNameLength = strlen(fileName);
	char* fileNameWithExtension = malloc( (fileNameLength+5)*sizeof(char) );
	strcpy(fileNameWithExtension, fileName);

	fileNameWithExtension[fileNameLength] = '.';
	fileNameWithExtension[fileNameLength+1] = 't';
	fileNameWithExtension[fileNameLength+2] = 'e';
	fileNameWithExtension[fileNameLength+3] = 'x';
	fileNameWithExtension[fileNameLength+4] = '\0';

	return fileNameWithExtension;
}

char* addPdfExtension(const char* fileName)
{
	if (fileName == NULL || strcmp(fileName, "") == 0)
	{
		ERROR_MSG("addPdfExtension", "Tried to add extension to empty file name");
		return NULL;
	}

	unsigned short fileNameLength = strlen(fileName);
	char* fileNameWithExtension = malloc( (fileNameLength+5)*sizeof(char) );
	strcpy(fileNameWithExtension, fileName);

	fileNameWithExtension[fileNameLength] = '.';
	fileNameWithExtension[fileNameLength+1] = 'p';
	fileNameWithExtension[fileNameLength+2] = 'd';
	fileNameWithExtension[fileNameLength+3] = 'f';
	fileNameWithExtension[fileNameLength+4] = '\0';

	return fileNameWithExtension;
}

char* getRandomStringOf10Chars()
{
	srand(time(NULL));

	char* answer = malloc(11*sizeof(char));
	unsigned char i;
	unsigned short randomNb;
	for (i=0; i<10; i++)
	{
		randomNb = RAND_INT(0, 2);
		if (randomNb == 0)
			randomNb = RAND_INT(48, 57);
		else if (randomNb == 1)
			randomNb = RAND_INT(65, 90);
		else
			randomNb = RAND_INT(97, 122);

		answer[i] = randomNb;
	}
	return answer;
}

char* getTmpFileName()
{
   char* tmpBodyOutputFilePath;
   tmpBodyOutputFilePath = malloc( (strlen(TMP_OUTPUT_FILENAME)+11)*sizeof(char) );

	char* randomPart = getRandomStringOf10Chars();

	sprintf(tmpBodyOutputFilePath, TMP_OUTPUT_FILENAME, randomPart);//TMP_OUTPUT_FILENAME == "LMD-%s.tmp"

	free(randomPart);

   return tmpBodyOutputFilePath;
}

STATUS deleteFile(const char* filePath)
{
   if (unlink(filePath) != 0)
   {
		if (errno != ENOENT)//if file exists
		{
	      char msg[256] = "Couldn't delete temporary file";
	      snprintf(msg, 256, "%s '%s'", msg, filePath);
	      ERROR_MSG("deleteFile", msg);
	      perror(NULL);
	      return RETURN_FAILURE;
		}
   }
   return RETURN_SUCCESS;
}

bool fileExists(const char* filePath)
{
   return (access(filePath, F_OK) != -1);
}