mirror of
https://github.com/Unidata/netcdf-c.git
synced 2024-12-15 08:30:11 +08:00
96 lines
2.1 KiB
C
96 lines
2.1 KiB
C
/*********************************************************************
|
|
* Copyright 2018, UCAR/Unidata
|
|
* See netcdf/COPYRIGHT file for copying and redistribution conditions.
|
|
* $Header: /upc/share/CVS/netcdf-3/ncgen3/escapes.c,v 1.2 1997/03/19 23:15:09 davis Exp $
|
|
*********************************************************************/
|
|
|
|
#include <stdlib.h>
|
|
#include <netcdf.h>
|
|
#include "generic.h"
|
|
#include "ncgen.h"
|
|
#include "genlib.h"
|
|
|
|
/*
|
|
* "Expands" valid escape sequences in yystring (read by lex) into the
|
|
* appropriate characters in termstring. For example, the two character
|
|
* sequence "\t" in yystring would be converted into a single tab character
|
|
* in termstring. On return, termstring is properly terminated.
|
|
*/
|
|
|
|
void
|
|
expand_escapes(
|
|
char *termstring, /* returned, with escapes expanded */
|
|
char *yytext,
|
|
int yyleng)
|
|
{
|
|
char *s, *t, *endp;
|
|
|
|
yytext[yyleng-1]='\0'; /* don't copy quotes */
|
|
/* expand "\" escapes, e.g. "\t" to tab character */
|
|
s = termstring;
|
|
t = yytext+1;
|
|
while(*t) {
|
|
if (*t == '\\') {
|
|
t++;
|
|
switch (*t) {
|
|
case 'a':
|
|
*s++ = '\007'; t++; /* will use '\a' when STDC */
|
|
break;
|
|
case 'b':
|
|
*s++ = '\b'; t++;
|
|
break;
|
|
case 'f':
|
|
*s++ = '\f'; t++;
|
|
break;
|
|
case 'n':
|
|
*s++ = '\n'; t++;
|
|
break;
|
|
case 'r':
|
|
*s++ = '\r'; t++;
|
|
break;
|
|
case 't':
|
|
*s++ = '\t'; t++;
|
|
break;
|
|
case 'v':
|
|
*s++ = '\v'; t++;
|
|
break;
|
|
case '\\':
|
|
*s++ = '\\'; t++;
|
|
break;
|
|
case '?':
|
|
*s++ = '\177'; t++;
|
|
break;
|
|
case '\'':
|
|
*s++ = '\''; t++;
|
|
break;
|
|
case '\"':
|
|
*s++ = '\"'; t++;
|
|
break;
|
|
case 'x':
|
|
t++; /* now t points to one or more hex digits */
|
|
*s++ = (char) strtol(t, &endp, 16);
|
|
t = endp;
|
|
break;
|
|
case '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
/* t now points to octal digits */
|
|
*s++ = (char) strtol(t, &endp, 8);
|
|
t = endp;
|
|
break;
|
|
default:
|
|
*s++ = *t++;
|
|
break;
|
|
}
|
|
} else {
|
|
*s++ = *t++;
|
|
}
|
|
}
|
|
*s = '\0';
|
|
}
|