Language Ccpp Cref Examples Convesc.c

 
/**********************************************************************
 *
 * Description: If a text string is created outside of C, the 
 * escape codes are not correctly stored. This 
 * routine will prepare them for C's use.
 * 
 * Author : M.J. Leslie
 * Date: 25-Feb-96
 *
 *********************************************************************/
void mos_ConvertEscapeCode(char *String, char *Code);
int main(int argc, char *argv[])
{
 if (argc == 1)
 {
 puts("\n\tPlease provide a text string on the command line.");
 }
 else
 {
 printf("I/P string is: %s\n", argv[1]);
 mos_ConvertEscapeCode(argv[1], "\\n");
 mos_ConvertEscapeCode(argv[1], "\\t");
 mos_ConvertEscapeCode(argv[1], "\\v");
 mos_ConvertEscapeCode(argv[1], "\\b");
 mos_ConvertEscapeCode(argv[1], "\\r");
 mos_ConvertEscapeCode(argv[1], "\\f");
 printf("O/P string is: %s\n", argv[1]);
 }
}
/**********************************************************************
 *
 * Purpose: To convert escape codes in text form into
 * actual codes. 
 *
 * I/P -------------------------------
 * | A | B | C | \ | n | D | E | F |
 * -------------------------------
 *
 * O/P ----------------------------
 * | A | B | C | \n | D | E | F |
 * ----------------------------
 *
 **********************************************************************/
void mos_ConvertEscapeCode(char *String, char *Code)
{
 char *Ptr1;
 char *Ptr2;
 char EscCode = ' ';
 
 /* ...	Make sure the Code is long enough */
 if (strlen(Code) == 2)
 {
 /* ...	Find the right escape code. */
 switch(Code[1])
 {
 case 'n':			/* New line */
 EscCode = '\n';
 break; 
 case 't':			/* Horizontal tab */
 EscCode = '\t';
 break;
 case 'v':			/* Vertical tab */
 EscCode = '\v';
 break; 
 case 'b':			/* Backspace */
 EscCode = '\b';
 break; 
 case 'r':			/* Return */
 EscCode = '\r';
 break; 
 case 'f':			/* Form feed */
 EscCode = '\f';
 break;
 default:
 break;
 }
 
 /* ...	If the escape code has been found */
 if (EscCode != ' ')
 {
 
 /* ...	Copy each character until the text code is found, 
	 ...	insert the escape code and copy the remaining chars. */
 for (Ptr1=Ptr2=String; Ptr2 < (String+strlen(String)+1); Ptr1++, Ptr2++)
 {
	if ((*Ptr2 == '\\') && (*(Ptr2+1) == Code[1])) 
	{
	 *Ptr1 = EscCode;
	 Ptr2++;
	}
	else
	{
	 *Ptr1 = *Ptr2;
	}
 }
 }
 }
}

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