mirror of
https://git.openldap.org/openldap/openldap.git
synced 2024-12-27 03:20:22 +08:00
399 lines
7.4 KiB
C
399 lines
7.4 KiB
C
/* $OpenLDAP$ */
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/*
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* Copyright 2000 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/string.h>
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#include "slap.h"
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#include "sets.h"
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static char **set_join (char **lset, int op, char **rset);
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static char **set_chase (SET_GATHER gatherer,
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void *cookie, char **set, char *attr, int attrlen, int closure);
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static int set_samedn (char *dn1, char *dn2);
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long
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set_size (char **set)
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{
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int i;
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i = 0;
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if (set != NULL) {
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while (set[i])
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i++;
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}
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return(i);
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}
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void
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set_dispose (char **set)
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{
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int i;
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if (set != NULL) {
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for (i = 0; set[i]; i++)
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ch_free(set[i]);
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ch_free(set);
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}
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}
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static char **
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set_join (char **lset, int op, char **rset)
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{
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char **set;
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long i, j, last;
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set = NULL;
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if (op == '|') {
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if (lset == NULL || *lset == NULL) {
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if (rset == NULL) {
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if (lset == NULL)
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return(ch_calloc(1, sizeof(char *)));
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return(lset);
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}
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set_dispose(lset);
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return(rset);
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}
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if (rset == NULL || *rset == NULL) {
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set_dispose(rset);
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return(lset);
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}
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i = set_size(lset) + set_size(rset) + 1;
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set = ch_calloc(i, sizeof(char *));
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if (set != NULL) {
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/* set_chase() depends on this routine to
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* keep the first elements of the result
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* set the same (and in the same order)
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* as the left-set.
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*/
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for (i = 0; lset[i]; i++)
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set[i] = lset[i];
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ch_free(lset);
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for (i = 0; rset[i]; i++) {
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for (j = 0; set[j]; j++) {
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if (set_samedn(rset[i], set[j])) {
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ch_free(rset[i]);
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rset[i] = NULL;
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break;
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}
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}
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if (rset[i])
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set[j] = rset[i];
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}
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ch_free(rset);
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}
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return(set);
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}
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if (op == '&') {
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if (lset == NULL || *lset == NULL || rset == NULL || *rset == NULL) {
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set = ch_calloc(1, sizeof(char *));
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} else {
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set = lset;
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lset = NULL;
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last = set_size(set) - 1;
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for (i = 0; set[i]; i++) {
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for (j = 0; rset[j]; j++) {
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if (set_samedn(set[i], rset[j]))
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break;
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}
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if (rset[j] == NULL) {
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ch_free(set[i]);
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set[i] = set[last];
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set[last] = NULL;
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last--;
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i--;
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}
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}
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}
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}
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set_dispose(lset);
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set_dispose(rset);
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return(set);
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}
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static char **
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set_chase (SET_GATHER gatherer,
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void *cookie, char **set, char *attr, int attrlen, int closure)
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{
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char **vals, **nset;
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char attrstr[32];
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int i;
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if (set == NULL)
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return(ch_calloc(1, sizeof(char *)));
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if (*set == NULL)
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return(set);
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if (attrlen > (sizeof(attrstr) - 1)) {
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set_dispose(set);
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return(NULL);
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}
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AC_MEMCPY(attrstr, attr, attrlen);
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attrstr[attrlen] = 0;
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nset = ch_calloc(1, sizeof(char *));
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if (nset == NULL) {
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set_dispose(set);
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return(NULL);
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}
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for (i = 0; set[i]; i++) {
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vals = (gatherer)(cookie, set[i], attrstr);
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if (vals != NULL)
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nset = set_join(nset, '|', vals);
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}
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set_dispose(set);
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if (closure) {
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for (i = 0; nset[i]; i++) {
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vals = (gatherer)(cookie, nset[i], attrstr);
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if (vals != NULL) {
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nset = set_join(nset, '|', vals);
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if (nset == NULL)
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break;
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}
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}
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}
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return(nset);
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}
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static int
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set_samedn (char *dn1, char *dn2)
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{
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char c1, c2;
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while (*dn1 == ' ') dn1++;
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while (*dn2 == ' ') dn2++;
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while (*dn1 || *dn2) {
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if (*dn1 != '=' && *dn1 != ','
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&& *dn2 != '=' && *dn2 != ',')
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{
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c1 = *dn1++;
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c2 = *dn2++;
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if (c1 >= 'a' && c1 <= 'z')
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c1 -= 'a' - 'A';
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if (c2 >= 'a' && c2 <= 'z')
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c2 -= 'a' - 'A';
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if (c1 != c2)
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return(0);
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} else {
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while (*dn1 == ' ') dn1++;
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while (*dn2 == ' ') dn2++;
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if (*dn1++ != *dn2++)
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return(0);
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while (*dn1 == ' ') dn1++;
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while (*dn2 == ' ') dn2++;
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}
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}
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return(1);
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}
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int
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set_filter (SET_GATHER gatherer,
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void *cookie, char *filter, char *user, char *this, char ***results)
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{
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#define IS_SET(x) ( (long)(x) >= 256 )
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#define IS_OP(x) ( (long)(x) < 256 )
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#define SF_ERROR(x) do { rc = -1; goto _error; } while (0)
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#define SF_TOP() ( (char **)( (stp < 0) ? 0 : stack[stp] ) )
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#define SF_POP() ( (char **)( (stp < 0) ? 0 : stack[stp--] ) )
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#define SF_PUSH(x) do { \
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if (stp >= 63) SF_ERROR(overflow); \
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stack[++stp] = (char **)(long)(x); \
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} while (0)
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char c;
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char **set, **lset;
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int len, op, rc, stp;
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char **stack[64];
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if (results)
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*results = NULL;
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stp = -1;
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while ((c = *filter++)) {
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set = NULL;
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switch (c) {
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case ' ':
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case '\t':
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case '\x0A':
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case '\x0D':
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break;
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case '(':
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if (IS_SET(SF_TOP()))
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SF_ERROR(syntax);
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SF_PUSH(c);
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break;
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case ')':
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set = SF_POP();
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if (IS_OP(set))
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SF_ERROR(syntax);
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if (SF_TOP() == (void *)'(') {
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SF_POP();
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SF_PUSH(set);
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set = NULL;
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} else if (IS_OP(SF_TOP())) {
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op = (long)SF_POP();
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lset = SF_POP();
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SF_POP();
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set = set_join(lset, op, set);
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if (set == NULL)
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SF_ERROR(memory);
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SF_PUSH(set);
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set = NULL;
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} else {
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SF_ERROR(syntax);
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}
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break;
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case '&':
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case '|':
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set = SF_POP();
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if (IS_OP(set))
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SF_ERROR(syntax);
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if (SF_TOP() == 0 || SF_TOP() == (void *)'(') {
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SF_PUSH(set);
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set = NULL;
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} else if (IS_OP(SF_TOP())) {
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op = (long)SF_POP();
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lset = SF_POP();
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set = set_join(lset, op, set);
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if (set == NULL)
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SF_ERROR(memory);
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SF_PUSH(set);
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set = NULL;
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} else {
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SF_ERROR(syntax);
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}
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SF_PUSH(c);
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break;
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case '[':
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if ((SF_TOP() == (void *)'/') || IS_SET(SF_TOP()))
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SF_ERROR(syntax);
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for ( len = 0;
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(c = *filter++) && (c != ']');
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len++)
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{ }
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if (c == 0)
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SF_ERROR(syntax);
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set = ch_calloc(2, sizeof(char *));
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if (set == NULL)
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SF_ERROR(memory);
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*set = ch_calloc(len + 1, sizeof(char));
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if (*set == NULL)
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SF_ERROR(memory);
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AC_MEMCPY(*set, &filter[-len - 1], len);
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SF_PUSH(set);
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set = NULL;
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break;
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case '-':
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c = *filter++;
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if (c != '>')
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SF_ERROR(syntax);
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/* fall through to next case */
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case '/':
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if (IS_OP(SF_TOP()))
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SF_ERROR(syntax);
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SF_PUSH('/');
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break;
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default:
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if ((c != '_')
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&& (c < 'A' || c > 'Z')
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&& (c < 'a' || c > 'z'))
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{
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SF_ERROR(syntax);
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}
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filter--;
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for ( len = 1;
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(c = filter[len])
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&& ((c >= '0' && c <= '9')
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|| (c >= 'A' && c <= 'Z')
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|| (c >= 'a' && c <= 'z'));
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len++)
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{ }
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if (len == 4
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&& memcmp("this", filter, len) == 0)
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{
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if ((SF_TOP() == (void *)'/') || IS_SET(SF_TOP()))
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SF_ERROR(syntax);
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set = ch_calloc(2, sizeof(char *));
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if (set == NULL)
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SF_ERROR(memory);
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*set = ch_strdup(this);
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if (*set == NULL)
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SF_ERROR(memory);
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} else if (len == 4
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&& memcmp("user", filter, len) == 0)
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{
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if ((SF_TOP() == (void *)'/') || IS_SET(SF_TOP()))
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SF_ERROR(syntax);
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set = ch_calloc(2, sizeof(char *));
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if (set == NULL)
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SF_ERROR(memory);
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*set = ch_strdup(user);
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if (*set == NULL)
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SF_ERROR(memory);
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} else if (SF_TOP() != (void *)'/') {
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SF_ERROR(syntax);
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} else {
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SF_POP();
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set = set_chase(gatherer,
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cookie, SF_POP(), filter, len, c == '*');
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if (set == NULL)
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SF_ERROR(memory);
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if (c == '*')
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len++;
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}
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filter += len;
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SF_PUSH(set);
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set = NULL;
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break;
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}
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}
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set = SF_POP();
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if (IS_OP(set))
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SF_ERROR(syntax);
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if (SF_TOP() == 0) {
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} else if (IS_OP(SF_TOP())) {
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op = (long)SF_POP();
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lset = SF_POP();
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set = set_join(lset, op, set);
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if (set == NULL)
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SF_ERROR(memory);
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} else {
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SF_ERROR(syntax);
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}
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rc = set_size(set);
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if (results) {
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*results = set;
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set = NULL;
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}
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_error:
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if (IS_SET(set))
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set_dispose(set);
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while ((set = SF_POP())) {
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if (IS_SET(set))
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set_dispose(set);
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}
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return(rc);
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}
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