File: [cvsweb.bsd.lv] / mandoc / mansearch.c (download)
Revision 1.57, Wed Apr 1 12:48:33 2015 UTC (9 years ago) by schwarze
Branch: MAIN
Changes since 1.56: +34 -36 lines
Let man(1) and apropos(1) work even when the current directory
is unusable: Only change back to the current directory when the
directory was changed before and the next path is relative.
This is now more similar to what makewhatis(8) does.
Issue reported by espie@.
|
/* $Id: mansearch.c,v 1.57 2015/04/01 12:48:33 schwarze Exp $ */
/*
* Copyright (c) 2012 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2013, 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "config.h"
#include <sys/mman.h>
#include <sys/types.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <glob.h>
#include <limits.h>
#include <regex.h>
#include <stdio.h>
#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#if HAVE_OHASH
#include <ohash.h>
#else
#include "compat_ohash.h"
#endif
#include <sqlite3.h>
#ifndef SQLITE_DETERMINISTIC
#define SQLITE_DETERMINISTIC 0
#endif
#include "mandoc.h"
#include "mandoc_aux.h"
#include "manconf.h"
#include "mansearch.h"
extern int mansearch_keymax;
extern const char *const mansearch_keynames[];
#define SQL_BIND_TEXT(_db, _s, _i, _v) \
do { if (SQLITE_OK != sqlite3_bind_text \
((_s), (_i)++, (_v), -1, SQLITE_STATIC)) \
fprintf(stderr, "%s\n", sqlite3_errmsg((_db))); \
} while (0)
#define SQL_BIND_INT64(_db, _s, _i, _v) \
do { if (SQLITE_OK != sqlite3_bind_int64 \
((_s), (_i)++, (_v))) \
fprintf(stderr, "%s\n", sqlite3_errmsg((_db))); \
} while (0)
#define SQL_BIND_BLOB(_db, _s, _i, _v) \
do { if (SQLITE_OK != sqlite3_bind_blob \
((_s), (_i)++, (&_v), sizeof(_v), SQLITE_STATIC)) \
fprintf(stderr, "%s\n", sqlite3_errmsg((_db))); \
} while (0)
struct expr {
regex_t regexp; /* compiled regexp, if applicable */
const char *substr; /* to search for, if applicable */
struct expr *next; /* next in sequence */
uint64_t bits; /* type-mask */
int equal; /* equality, not subsring match */
int open; /* opening parentheses before */
int and; /* logical AND before */
int close; /* closing parentheses after */
};
struct match {
uint64_t pageid; /* identifier in database */
uint64_t bits; /* name type mask */
char *desc; /* manual page description */
int form; /* bit field: formatted, zipped? */
};
static void buildnames(const struct mansearch *,
struct manpage *, sqlite3 *,
sqlite3_stmt *, uint64_t,
const char *, int form);
static char *buildoutput(sqlite3 *, sqlite3_stmt *,
uint64_t, uint64_t);
static void *hash_alloc(size_t, void *);
static void hash_free(void *, void *);
static void *hash_calloc(size_t, size_t, void *);
static struct expr *exprcomp(const struct mansearch *,
int, char *[]);
static void exprfree(struct expr *);
static struct expr *exprterm(const struct mansearch *, char *, int);
static int manpage_compare(const void *, const void *);
static void sql_append(char **sql, size_t *sz,
const char *newstr, int count);
static void sql_match(sqlite3_context *context,
int argc, sqlite3_value **argv);
static void sql_regexp(sqlite3_context *context,
int argc, sqlite3_value **argv);
static char *sql_statement(const struct expr *);
int
mansearch_setup(int start)
{
static void *pagecache;
int c;
#define PC_PAGESIZE 1280
#define PC_NUMPAGES 256
if (start) {
if (NULL != pagecache) {
fprintf(stderr, "pagecache already enabled\n");
return((int)MANDOCLEVEL_BADARG);
}
pagecache = mmap(NULL, PC_PAGESIZE * PC_NUMPAGES,
PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANON, -1, 0);
if (MAP_FAILED == pagecache) {
perror("mmap");
pagecache = NULL;
return((int)MANDOCLEVEL_SYSERR);
}
c = sqlite3_config(SQLITE_CONFIG_PAGECACHE,
pagecache, PC_PAGESIZE, PC_NUMPAGES);
if (SQLITE_OK == c)
return((int)MANDOCLEVEL_OK);
fprintf(stderr, "pagecache: %s\n", sqlite3_errstr(c));
} else if (NULL == pagecache) {
fprintf(stderr, "pagecache missing\n");
return((int)MANDOCLEVEL_BADARG);
}
if (-1 == munmap(pagecache, PC_PAGESIZE * PC_NUMPAGES)) {
perror("munmap");
pagecache = NULL;
return((int)MANDOCLEVEL_SYSERR);
}
pagecache = NULL;
return((int)MANDOCLEVEL_OK);
}
int
mansearch(const struct mansearch *search,
const struct manpaths *paths,
int argc, char *argv[],
struct manpage **res, size_t *sz)
{
int64_t pageid;
uint64_t outbit, iterbit;
char buf[PATH_MAX];
char *sql;
struct manpage *mpage;
struct expr *e, *ep;
sqlite3 *db;
sqlite3_stmt *s, *s2;
struct match *mp;
struct ohash_info info;
struct ohash htab;
unsigned int idx;
size_t i, j, cur, maxres;
int c, chdir_status, getcwd_status, indexbit;
if (argc == 0 || (e = exprcomp(search, argc, argv)) == NULL) {
*sz = 0;
return(0);
}
info.calloc = hash_calloc;
info.alloc = hash_alloc;
info.free = hash_free;
info.key_offset = offsetof(struct match, pageid);
cur = maxres = 0;
*res = NULL;
if (NULL != search->outkey) {
outbit = TYPE_Nd;
for (indexbit = 0, iterbit = 1;
indexbit < mansearch_keymax;
indexbit++, iterbit <<= 1) {
if (0 == strcasecmp(search->outkey,
mansearch_keynames[indexbit])) {
outbit = iterbit;
break;
}
}
} else
outbit = 0;
/*
* Remember the original working directory, if possible.
* This will be needed if the second or a later directory
* is given as a relative path.
* Do not error out if the current directory is not
* searchable: Maybe it won't be needed after all.
*/
if (getcwd(buf, PATH_MAX) == NULL) {
getcwd_status = 0;
(void)strlcpy(buf, strerror(errno), sizeof(buf));
} else
getcwd_status = 1;
sql = sql_statement(e);
/*
* Loop over the directories (containing databases) for us to
* search.
* Don't let missing/bad databases/directories phase us.
* In each, try to open the resident database and, if it opens,
* scan it for our match expression.
*/
chdir_status = 0;
for (i = 0; i < paths->sz; i++) {
if (chdir_status && paths->paths[i][0] != '/') {
if ( ! getcwd_status) {
fprintf(stderr, "%s: getcwd: %s\n",
paths->paths[i], buf);
continue;
} else if (chdir(buf) == -1) {
perror(buf);
continue;
}
}
if (chdir(paths->paths[i]) == -1) {
perror(paths->paths[i]);
continue;
}
chdir_status = 1;
c = sqlite3_open_v2(MANDOC_DB, &db,
SQLITE_OPEN_READONLY, NULL);
if (SQLITE_OK != c) {
fprintf(stderr, "%s/%s: %s\n",
paths->paths[i], MANDOC_DB, strerror(errno));
sqlite3_close(db);
continue;
}
/*
* Define the SQL functions for substring
* and regular expression matching.
*/
c = sqlite3_create_function(db, "match", 2,
SQLITE_UTF8 | SQLITE_DETERMINISTIC,
NULL, sql_match, NULL, NULL);
assert(SQLITE_OK == c);
c = sqlite3_create_function(db, "regexp", 2,
SQLITE_UTF8 | SQLITE_DETERMINISTIC,
NULL, sql_regexp, NULL, NULL);
assert(SQLITE_OK == c);
j = 1;
c = sqlite3_prepare_v2(db, sql, -1, &s, NULL);
if (SQLITE_OK != c)
fprintf(stderr, "%s\n", sqlite3_errmsg(db));
for (ep = e; NULL != ep; ep = ep->next) {
if (NULL == ep->substr) {
SQL_BIND_BLOB(db, s, j, ep->regexp);
} else
SQL_BIND_TEXT(db, s, j, ep->substr);
if (0 == ((TYPE_Nd | TYPE_Nm) & ep->bits))
SQL_BIND_INT64(db, s, j, ep->bits);
}
memset(&htab, 0, sizeof(struct ohash));
ohash_init(&htab, 4, &info);
/*
* Hash each entry on its [unique] document identifier.
* This is a uint64_t.
* Instead of using a hash function, simply convert the
* uint64_t to a uint32_t, the hash value's type.
* This gives good performance and preserves the
* distribution of buckets in the table.
*/
while (SQLITE_ROW == (c = sqlite3_step(s))) {
pageid = sqlite3_column_int64(s, 2);
idx = ohash_lookup_memory(&htab,
(char *)&pageid, sizeof(uint64_t),
(uint32_t)pageid);
if (NULL != ohash_find(&htab, idx))
continue;
mp = mandoc_calloc(1, sizeof(struct match));
mp->pageid = pageid;
mp->form = sqlite3_column_int(s, 1);
mp->bits = sqlite3_column_int64(s, 3);
if (TYPE_Nd == outbit)
mp->desc = mandoc_strdup((const char *)
sqlite3_column_text(s, 0));
ohash_insert(&htab, idx, mp);
}
if (SQLITE_DONE != c)
fprintf(stderr, "%s\n", sqlite3_errmsg(db));
sqlite3_finalize(s);
c = sqlite3_prepare_v2(db,
"SELECT sec, arch, name, pageid FROM mlinks "
"WHERE pageid=? ORDER BY sec, arch, name",
-1, &s, NULL);
if (SQLITE_OK != c)
fprintf(stderr, "%s\n", sqlite3_errmsg(db));
c = sqlite3_prepare_v2(db,
"SELECT bits, key, pageid FROM keys "
"WHERE pageid=? AND bits & ?",
-1, &s2, NULL);
if (SQLITE_OK != c)
fprintf(stderr, "%s\n", sqlite3_errmsg(db));
for (mp = ohash_first(&htab, &idx);
NULL != mp;
mp = ohash_next(&htab, &idx)) {
if (cur + 1 > maxres) {
maxres += 1024;
*res = mandoc_reallocarray(*res,
maxres, sizeof(struct manpage));
}
mpage = *res + cur;
mpage->ipath = i;
mpage->bits = mp->bits;
mpage->sec = 10;
mpage->form = mp->form;
buildnames(search, mpage, db, s, mp->pageid,
paths->paths[i], mp->form);
if (mpage->names != NULL) {
mpage->output = TYPE_Nd & outbit ?
mp->desc : outbit ?
buildoutput(db, s2, mp->pageid, outbit) :
NULL;
cur++;
}
free(mp);
}
sqlite3_finalize(s);
sqlite3_finalize(s2);
sqlite3_close(db);
ohash_delete(&htab);
/*
* In man(1) mode, prefer matches in earlier trees
* over matches in later trees.
*/
if (cur && search->firstmatch)
break;
}
qsort(*res, cur, sizeof(struct manpage), manpage_compare);
if (chdir_status && getcwd_status && chdir(buf) == -1)
perror(buf);
exprfree(e);
free(sql);
*sz = cur;
return(1);
}
void
mansearch_free(struct manpage *res, size_t sz)
{
size_t i;
for (i = 0; i < sz; i++) {
free(res[i].file);
free(res[i].names);
free(res[i].output);
}
free(res);
}
static int
manpage_compare(const void *vp1, const void *vp2)
{
const struct manpage *mp1, *mp2;
int diff;
mp1 = vp1;
mp2 = vp2;
return( (diff = mp2->bits - mp1->bits) ? diff :
(diff = mp1->sec - mp2->sec) ? diff :
strcasecmp(mp1->names, mp2->names));
}
static void
buildnames(const struct mansearch *search, struct manpage *mpage,
sqlite3 *db, sqlite3_stmt *s,
uint64_t pageid, const char *path, int form)
{
glob_t globinfo;
char *firstname, *newnames, *prevsec, *prevarch;
const char *oldnames, *sep1, *name, *sec, *sep2, *arch, *fsec;
size_t i;
int c, globres;
mpage->file = NULL;
mpage->names = NULL;
firstname = prevsec = prevarch = NULL;
i = 1;
SQL_BIND_INT64(db, s, i, pageid);
while (SQLITE_ROW == (c = sqlite3_step(s))) {
/* Decide whether we already have some names. */
if (NULL == mpage->names) {
oldnames = "";
sep1 = "";
} else {
oldnames = mpage->names;
sep1 = ", ";
}
/* Fetch the next name, rejecting sec/arch mismatches. */
sec = (const char *)sqlite3_column_text(s, 0);
if (search->sec != NULL && strcasecmp(sec, search->sec))
continue;
arch = (const char *)sqlite3_column_text(s, 1);
if (search->arch != NULL && *arch != '\0' &&
strcasecmp(arch, search->arch))
continue;
name = (const char *)sqlite3_column_text(s, 2);
/* Remember the first section found. */
if (9 < mpage->sec && '1' <= *sec && '9' >= *sec)
mpage->sec = (*sec - '1') + 1;
/* If the section changed, append the old one. */
if (NULL != prevsec &&
(strcmp(sec, prevsec) ||
strcmp(arch, prevarch))) {
sep2 = '\0' == *prevarch ? "" : "/";
mandoc_asprintf(&newnames, "%s(%s%s%s)",
oldnames, prevsec, sep2, prevarch);
free(mpage->names);
oldnames = mpage->names = newnames;
free(prevsec);
free(prevarch);
prevsec = prevarch = NULL;
}
/* Save the new section, to append it later. */
if (NULL == prevsec) {
prevsec = mandoc_strdup(sec);
prevarch = mandoc_strdup(arch);
}
/* Append the new name. */
mandoc_asprintf(&newnames, "%s%s%s",
oldnames, sep1, name);
free(mpage->names);
mpage->names = newnames;
/* Also save the first file name encountered. */
if (mpage->file != NULL)
continue;
if (form & FORM_SRC) {
sep1 = "man";
fsec = sec;
} else {
sep1 = "cat";
fsec = "0";
}
sep2 = *arch == '\0' ? "" : "/";
mandoc_asprintf(&mpage->file, "%s/%s%s%s%s/%s.%s",
path, sep1, sec, sep2, arch, name, fsec);
if (access(mpage->file, R_OK) != -1)
continue;
/* Handle unusual file name extensions. */
if (firstname == NULL)
firstname = mpage->file;
else
free(mpage->file);
mandoc_asprintf(&mpage->file, "%s/%s%s%s%s/%s.*",
path, sep1, sec, sep2, arch, name);
globres = glob(mpage->file, 0, NULL, &globinfo);
free(mpage->file);
mpage->file = globres ? NULL :
mandoc_strdup(*globinfo.gl_pathv);
globfree(&globinfo);
}
if (c != SQLITE_DONE)
fprintf(stderr, "%s\n", sqlite3_errmsg(db));
sqlite3_reset(s);
/* If none of the files is usable, use the first name. */
if (mpage->file == NULL)
mpage->file = firstname;
else if (mpage->file != firstname)
free(firstname);
/* Append one final section to the names. */
if (prevsec != NULL) {
sep2 = *prevarch == '\0' ? "" : "/";
mandoc_asprintf(&newnames, "%s(%s%s%s)",
mpage->names, prevsec, sep2, prevarch);
free(mpage->names);
mpage->names = newnames;
free(prevsec);
free(prevarch);
}
}
static char *
buildoutput(sqlite3 *db, sqlite3_stmt *s, uint64_t pageid, uint64_t outbit)
{
char *output, *newoutput;
const char *oldoutput, *sep1, *data;
size_t i;
int c;
output = NULL;
i = 1;
SQL_BIND_INT64(db, s, i, pageid);
SQL_BIND_INT64(db, s, i, outbit);
while (SQLITE_ROW == (c = sqlite3_step(s))) {
if (NULL == output) {
oldoutput = "";
sep1 = "";
} else {
oldoutput = output;
sep1 = " # ";
}
data = (const char *)sqlite3_column_text(s, 1);
mandoc_asprintf(&newoutput, "%s%s%s",
oldoutput, sep1, data);
free(output);
output = newoutput;
}
if (SQLITE_DONE != c)
fprintf(stderr, "%s\n", sqlite3_errmsg(db));
sqlite3_reset(s);
return(output);
}
/*
* Implement substring match as an application-defined SQL function.
* Using the SQL LIKE or GLOB operators instead would be a bad idea
* because that would require escaping metacharacters in the string
* being searched for.
*/
static void
sql_match(sqlite3_context *context, int argc, sqlite3_value **argv)
{
assert(2 == argc);
sqlite3_result_int(context, NULL != strcasestr(
(const char *)sqlite3_value_text(argv[1]),
(const char *)sqlite3_value_text(argv[0])));
}
/*
* Implement regular expression match
* as an application-defined SQL function.
*/
static void
sql_regexp(sqlite3_context *context, int argc, sqlite3_value **argv)
{
assert(2 == argc);
sqlite3_result_int(context, !regexec(
(regex_t *)sqlite3_value_blob(argv[0]),
(const char *)sqlite3_value_text(argv[1]),
0, NULL, 0));
}
static void
sql_append(char **sql, size_t *sz, const char *newstr, int count)
{
size_t newsz;
newsz = 1 < count ? (size_t)count : strlen(newstr);
*sql = mandoc_realloc(*sql, *sz + newsz + 1);
if (1 < count)
memset(*sql + *sz, *newstr, (size_t)count);
else
memcpy(*sql + *sz, newstr, newsz);
*sz += newsz;
(*sql)[*sz] = '\0';
}
/*
* Prepare the search SQL statement.
*/
static char *
sql_statement(const struct expr *e)
{
char *sql;
size_t sz;
int needop;
sql = mandoc_strdup(e->equal ?
"SELECT desc, form, pageid, bits "
"FROM mpages NATURAL JOIN names WHERE " :
"SELECT desc, form, pageid, 0 FROM mpages WHERE ");
sz = strlen(sql);
for (needop = 0; NULL != e; e = e->next) {
if (e->and)
sql_append(&sql, &sz, " AND ", 1);
else if (needop)
sql_append(&sql, &sz, " OR ", 1);
if (e->open)
sql_append(&sql, &sz, "(", e->open);
sql_append(&sql, &sz,
TYPE_Nd & e->bits
? (NULL == e->substr
? "desc REGEXP ?"
: "desc MATCH ?")
: TYPE_Nm == e->bits
? (NULL == e->substr
? "pageid IN (SELECT pageid FROM names "
"WHERE name REGEXP ?)"
: e->equal
? "name = ? "
: "pageid IN (SELECT pageid FROM names "
"WHERE name MATCH ?)")
: (NULL == e->substr
? "pageid IN (SELECT pageid FROM keys "
"WHERE key REGEXP ? AND bits & ?)"
: "pageid IN (SELECT pageid FROM keys "
"WHERE key MATCH ? AND bits & ?)"), 1);
if (e->close)
sql_append(&sql, &sz, ")", e->close);
needop = 1;
}
return(sql);
}
/*
* Compile a set of string tokens into an expression.
* Tokens in "argv" are assumed to be individual expression atoms (e.g.,
* "(", "foo=bar", etc.).
*/
static struct expr *
exprcomp(const struct mansearch *search, int argc, char *argv[])
{
uint64_t mask;
int i, toopen, logic, igncase, toclose;
struct expr *first, *prev, *cur, *next;
first = cur = NULL;
logic = igncase = toopen = toclose = 0;
for (i = 0; i < argc; i++) {
if (0 == strcmp("(", argv[i])) {
if (igncase)
goto fail;
toopen++;
toclose++;
continue;
} else if (0 == strcmp(")", argv[i])) {
if (toopen || logic || igncase || NULL == cur)
goto fail;
cur->close++;
if (0 > --toclose)
goto fail;
continue;
} else if (0 == strcmp("-a", argv[i])) {
if (toopen || logic || igncase || NULL == cur)
goto fail;
logic = 1;
continue;
} else if (0 == strcmp("-o", argv[i])) {
if (toopen || logic || igncase || NULL == cur)
goto fail;
logic = 2;
continue;
} else if (0 == strcmp("-i", argv[i])) {
if (igncase)
goto fail;
igncase = 1;
continue;
}
next = exprterm(search, argv[i], !igncase);
if (NULL == next)
goto fail;
if (NULL == first)
first = next;
else
cur->next = next;
prev = cur = next;
/*
* Searching for descriptions must be split out
* because they are stored in the mpages table,
* not in the keys table.
*/
for (mask = TYPE_Nm; mask <= TYPE_Nd; mask <<= 1) {
if (mask & cur->bits && ~mask & cur->bits) {
next = mandoc_calloc(1,
sizeof(struct expr));
memcpy(next, cur, sizeof(struct expr));
prev->open = 1;
cur->bits = mask;
cur->next = next;
cur = next;
cur->bits &= ~mask;
}
}
prev->and = (1 == logic);
prev->open += toopen;
if (cur != prev)
cur->close = 1;
toopen = logic = igncase = 0;
}
if ( ! (toopen || logic || igncase || toclose))
return(first);
fail:
if (NULL != first)
exprfree(first);
return(NULL);
}
static struct expr *
exprterm(const struct mansearch *search, char *buf, int cs)
{
char errbuf[BUFSIZ];
struct expr *e;
char *key, *val;
uint64_t iterbit;
int i, irc;
if ('\0' == *buf)
return(NULL);
e = mandoc_calloc(1, sizeof(struct expr));
if (search->argmode == ARG_NAME) {
e->bits = TYPE_Nm;
e->substr = buf;
e->equal = 1;
return(e);
}
/*
* Separate macro keys from search string.
* If needed, request regular expression handling
* by setting e->substr to NULL.
*/
if (search->argmode == ARG_WORD) {
e->bits = TYPE_Nm;
e->substr = NULL;
mandoc_asprintf(&val, "[[:<:]]%s[[:>:]]", buf);
cs = 0;
} else if ((val = strpbrk(buf, "=~")) == NULL) {
e->bits = TYPE_Nm | TYPE_Nd;
e->substr = buf;
} else {
if (val == buf)
e->bits = TYPE_Nm | TYPE_Nd;
if ('=' == *val)
e->substr = val + 1;
*val++ = '\0';
if (NULL != strstr(buf, "arch"))
cs = 0;
}
/* Compile regular expressions. */
if (NULL == e->substr) {
irc = regcomp(&e->regexp, val,
REG_EXTENDED | REG_NOSUB | (cs ? 0 : REG_ICASE));
if (search->argmode == ARG_WORD)
free(val);
if (irc) {
regerror(irc, &e->regexp, errbuf, sizeof(errbuf));
fprintf(stderr, "regcomp: %s\n", errbuf);
free(e);
return(NULL);
}
}
if (e->bits)
return(e);
/*
* Parse out all possible fields.
* If the field doesn't resolve, bail.
*/
while (NULL != (key = strsep(&buf, ","))) {
if ('\0' == *key)
continue;
for (i = 0, iterbit = 1;
i < mansearch_keymax;
i++, iterbit <<= 1) {
if (0 == strcasecmp(key,
mansearch_keynames[i])) {
e->bits |= iterbit;
break;
}
}
if (i == mansearch_keymax) {
if (strcasecmp(key, "any")) {
free(e);
return(NULL);
}
e->bits |= ~0ULL;
}
}
return(e);
}
static void
exprfree(struct expr *p)
{
struct expr *pp;
while (NULL != p) {
pp = p->next;
free(p);
p = pp;
}
}
static void *
hash_calloc(size_t nmemb, size_t sz, void *arg)
{
return(mandoc_calloc(nmemb, sz));
}
static void *
hash_alloc(size_t sz, void *arg)
{
return(mandoc_malloc(sz));
}
static void
hash_free(void *p, void *arg)
{
free(p);
}
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