shithub: vcardfs

ref: f43b5b9a6d055938ad4f497e7e556a1e3ad5365c
dir: /libvcard/vcard.c/

#include <u.h>
#include <libc.h>
#include "vcard.h"

extern Vcard *vcparsecard;
extern char *vcparsestr;
extern int yyparse(void);

static Vcard*
parse(char *s)
{
	memset(&vcstate, sizeof vcstate, 0);
	vcparsestr = s;
	vcparsecard = nil;
	yyparse();
	return vcparsecard;
}

static void
fold(char *str)
{
	char *s;
	char *end;
	
	end = strchr(str, 0);
	
	while (str < end) {
		s = strchr(str, '\r');
		if (!s)
			break;
		if (s[1] == 0)
			break;
		if (s[1] == '\n' && (s[2] == ' ' || s[2] == '\t')) {
			memmove(s, s+3, end-s-3);
			end -= 3;
		}
		str = s+1;
	}
	*end = 0;
}

#ifdef TEST
void
_vc_t_fold(char *s)
{
	fold(s);
}
#endif

Vcard*
vcparse(char *s)
{
	fold(s);
	return parse(s);
}

Vcard*
vcparsefile(char *file)
{
	int fd, step;
	char *s, *t;
	long n;
	Vcard *vc;
	
	fd = open(file, OREAD);
	if (fd < 0)
		return nil;
	
	step = 1;
	s = mallocz(8192, 1);
	t = s;
	while ((n = read(fd, t, 8191)) > 0) {
		t += n;
		step++;
		s = realloc(s, 8192 * step);
		memset(s + 8192*(step-1), 0, 8192);
	}
	close(fd);
	
	vc = vcparse(s);
	free(s);
	return vc;
}