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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2011 AT&T Intellectual Property *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
#include <ast.h>
#include <ctype.h>
static char** ids;
static const char* dflt[] = { "ast", "standard", 0 };
/*
* initialize the conformance() id list
*/
static char**
initconformance(void)
{
char* m;
char** p;
char* t;
int h;
int i;
int j;
int c;
Sfio_t* sp;
static const char* conf[] = { "CONFORMANCE", "HOSTTYPE", "UNIVERSE" };
p = 0;
if (sp = sfstropen())
{
for (i = h = 0, j = 1; i < elementsof(conf); i++)
if (*(m = astconf(conf[i], NiL, NiL)) && (h |= (1<<i)) || !i && (m = "ast"))
{
t = m;
while ((c = *m++) && c != '.')
{
if (isupper(c))
c = tolower(c);
sfputc(sp, c);
}
sfputc(sp, 0);
j++;
if ((c = (m - t)) == 6 && strneq(t, "linux", 5))
{
sfputr(sp, "gnu", 0);
j++;
}
else if (c > 3 && strneq(t, "bsd", 3) || c == 7 && strneq(t, "debian", 7))
{
sfputr(sp, "bsd", 0);
j++;
}
if (h & 1)
break;
}
i = sfstrtell(sp);
sfstrseek(sp, 0, SEEK_SET);
if (p = newof(0, char*, j, i))
{
m = (char*)(p + j--);
memcpy(m, sfstrbase(sp), i);
i = 0;
p[i++] = m;
while (i < j)
{
while (*m++);
p[i++] = m;
}
p[i] = 0;
}
sfstrclose(sp);
}
if (!p)
p = (char**)dflt;
return ids = p;
}
/*
* return conformance id if s size n is in conformance
* prefix match of s on the conformance id table
* s==0 => "standard"
*/
char*
conformance(const char* s, size_t n)
{
char** p;
char** q;
char* m;
const char* e;
const char* t;
static uint32_t serial = ~(uint32_t)0;
if (!(p = ids) || serial != ast.env_serial)
{
serial = ast.env_serial;
if (ids)
{
if (ids != (char**)dflt)
free(ids);
ids = 0;
}
p = initconformance();
}
if (!s)
s = dflt[1];
if (!n)
n = strlen(s);
e = s + n;
if (*s == '(')
s++;
do
{
while (s < e && (isspace(*s) || *s == ',' || *s == '|'))
s++;
if (*s == ')')
break;
for (t = s; s < e && !isspace(*s) && *s != ',' && *s != '|' && *s != ')'; s++);
if (s == t)
break;
q = p;
while (m = *q++)
if (strneq(t, m, s - t))
return m;
if (s < e)
s++;
} while (s < e);
return 0;
}
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