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/* lispio.cpp
*
* Copyright (C) 1994-2011 Paul Boersma
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* pb 1995/07/28
* pb 2002/03/07 GPL
* pb 2011/05/15 C++
*/
#include "melder.h"
#include "lispio.h"
#include <ctype.h>
#define my me ->
#define thy thee ->
int Lispio_openList (const Lispio *me, LispioSeq *thee) {
int ch;
if (my length == 0) return 0; /* Empty object. */
if (my string [0] != '(') return 0; /* Not a list. */
Melder_assert (my length >= 2);
Melder_assert (my string [my length - 1] == ')');
/* Peel leading '(' and trailing ')'. */
thy length = my length - 2;
thy string = my string + 1;
/* Forget leading spaces. */
while (thy length != 0 && ((ch = *thy string) == ' ' || ch == '\n' || ch == '\t')) {
thy length --;
thy string ++;
}
return 1;
}
int Lispio_openListFromFile (LispioSeq *seq, FILE *f, char *buffer, long maxLength) {
long depth = 0, length = 0;
int ch;
Lispio list;
/* Skip spaces to left parenthesis, checking for normal end-of-file. */
while ((ch = getc (f)) != '(') {
if (ch == EOF) return EOF;
if (ch != ' ' && ch != '\n' && ch != '\t')
Melder_throw ("Lispio_openListFromFile: not a list: expected leading `(' but found character `%c'.", ch);
}
buffer [0] = ch;
depth = 1;
length = 1;
while (depth != 0) {
ch = getc (f);
if (ch == EOF)
Melder_throw ("Lispio_openListFromFile: early end-of-file detected: no matching `)': depth %ld instead of 0.", depth);
if (length >= maxLength)
Melder_throw ("Lispio_openListFromFile: buffer too small for list: list longer than %ld bytes.", maxLength);
buffer [length ++] = ch;
if (ch == '(') depth += 1; else if (ch == ')') depth -= 1;
}
list.length = length;
list.string = buffer;
return Lispio_openList (& list, seq); // always 1
}
char * Lispio_string (const Lispio *me) {
autostring8 result = Melder_malloc (char, my length + 1);
memcpy (result.peek(), my string, my length);
result [my length] = '\0';
return result.transfer();
}
int Lispio_equal (const Lispio *me, const Lispio *thee) {
long length = my length;
return thy length == length && (length == 0 || ! memcmp (my string, thy string, length));
}
int Lispio_strequ (const Lispio *me, const char *string) {
long length = my length, thyLength = strlen (string);
return thyLength == length && (length == 0 || ! memcmp (my string, string, length));
}
int Lispio_read (LispioSeq *me, Lispio *first) {
int ch;
first -> string = my string;
if (my length == 0) { first -> length = 0; return 0; }
if ((ch = my string [0]) == '(') { /* First is a list? */
long depth = 1;
first -> length = 1;
while (depth != 0) {
ch = first -> string [first -> length ++];
if (ch == '(') depth += 1; else if (ch == ')') depth -= 1;
}
} else { /* First is an atom? */
first -> length = 1;
while ((ch = first -> string [first -> length ++]) != ' ' && ch != '\n' && ch != '\t' && ch != '(' && ch != ')')
{ }
first -> length -= 1; /* Put back delimiter. */
}
my length -= first -> length;
Melder_assert (my length >= 0);
my string += first -> length;
while (my length != 0 && ((ch = *my string) == ' ' || ch == '\n' || ch == '\t'))
{ my length --; my string ++; } /* Remove leading spaces. */
return 1;
}
long Lispio_count (const LispioSeq *me) {
long result = 0;
LispioSeq seq = * (LispioSeq *) me;
Lispio obj;
while (Lispio_read (& seq, & obj)) result ++;
return result;
}
int Lispio_integer (const Lispio *me, long *value) {
char buffer [12];
int ichar = 0, numeric = 1;
*value = 0;
if (my length < 1 || my length > 11) return 0;
if (my string [0] == '+' || my string [0] == '-') {
if (my length < 2) return 0; /* Only a sign. */
ichar = 1;
}
for (; ichar < my length; ichar ++) if (! isdigit (my string [ichar])) numeric = 0;
strncpy (buffer, my string, my length);
buffer [my length] = '\0';
*value = atol (buffer);
return numeric;
}
/* End of file lispio.cpp */
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