LALDict.c

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/*
*  Copyright (C) 2016 Jolien Creighton
*
*  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 with program; see the file COPYING. If not, write to the
*  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
*  MA  02110-1301  USA
*/
 
/*
 * Dictionary is implemented as a hash search with algorithm adopted
 * from "The C Programming Language" by Kernighan and Ritchie, 2nd ed.
 * section 6.6.
 */
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
 
#include <lal/LALStdio.h>
#include <lal/LALStdlib.h>
#include <lal/LALString.h>
#include <lal/LALDict.h>
#include "LALValue_private.h"
#include "config.h"
 
#define LAL_DICT_HASHSIZE 101
 
struct tagLALDictEntry {
        struct tagLALDictEntry *next;
        char *key;
        LALValue value;
};
 
struct tagLALDict {
        size_t size;
        struct tagLALDictEntry *hashes[];
};
 
static size_t hash(const char *s)
{
        size_t hashval;
        for (hashval = 0; *s != '\0'; ++s)
                hashval = *s + 31 * hashval;
        return hashval;
}
 
/* DICT ENTRY ROUTINES */
 
void XLALDictEntryFree(LALDictEntry *list)
{
        while (list) {
                LALDictEntry *next = list->next;
                if (list->key)
                        LALFree(list->key);
                LALFree(list);
                list = next;
        }
        return;
}
 
LALDictEntry * XLALDictEntryAlloc(size_t size)
{
        LALDictEntry *entry;
        entry = XLALMalloc(sizeof(*entry) + size);
        if (!entry)
                XLAL_ERROR_NULL(XLAL_ENOMEM);
        entry->key = NULL;
        entry->value.size = size;
        return entry;
}
 
LALDictEntry * XLALDictEntryRealloc(LALDictEntry *entry, size_t size)
{
        if (entry == NULL)
                return XLALDictEntryAlloc(size);
        if (entry->value.size == size)
                return entry;
        entry = XLALRealloc(entry, sizeof(*entry) + size);
        if (!entry)
                XLAL_ERROR_NULL(XLAL_ENOMEM);
        entry->value.size = size;
        return entry;
}
 
LALDictEntry * XLALDictEntrySetKey(LALDictEntry *entry, const char *key)
{
        if (entry->key)
                LALFree(entry->key);
        if ((entry->key = XLALStringDuplicate(key)) == NULL)
                XLAL_ERROR_NULL(XLAL_EFUNC);
        return entry;
}
 
LALDictEntry * XLALDictEntrySetValue(LALDictEntry *entry, const void *data, size_t size, LALTYPECODE type)
{
        if (XLALValueSet(&entry->value, data, size, type) == NULL)
                XLAL_ERROR_NULL(XLAL_EFUNC);
        return entry;
}
 
/* warning: shallow pointer */
const char * XLALDictEntryGetKey(const LALDictEntry *entry)
{
        return entry->key;
}
 
/* warning: shallow pointer */
const LALValue * XLALDictEntryGetValue(const LALDictEntry *entry)
{
        return &entry->value;
}
 
/* DICT ROUTINES */
 
void XLALDestroyDict(LALDict *dict)
{
        if (dict) {
                size_t i;
                for (i = 0; i < dict->size; ++i)
                        XLALDictEntryFree(dict->hashes[i]);
                LALFree(dict);
        }
        return;
}
 
LALDict * XLALCreateDict(void)
{
        LALDict *dict;
        dict = XLALCalloc(1, sizeof(dict) + LAL_DICT_HASHSIZE * sizeof(*dict->hashes));
        if (!dict)
                XLAL_ERROR_NULL(XLAL_ENOMEM);
        dict->size = LAL_DICT_HASHSIZE;
        return dict;
}
 
void XLALDictForeach(LALDict *dict, void (*func)(char *, LALValue *, void *), void *thunk)
{
        size_t i;
        for (i = 0; i < dict->size; ++i) {
                LALDictEntry *entry;
                for (entry = dict->hashes[i]; entry != NULL; entry = entry->next)
                        func(entry->key, &entry->value, thunk);
        }
        return;
}
 
LALDictEntry * XLALDictFind(LALDict *dict, int (*func)(const char *, const LALValue *, void *), void *thunk)
{
        size_t i;
        for (i = 0; i < dict->size; ++i) {
                LALDictEntry *entry;
                for (entry = dict->hashes[i]; entry != NULL; entry = entry->next)
                        if (func(entry->key, &entry->value, thunk))
                                return entry;
        }
        return NULL;
}
 
void XLALDictIterInit(LALDictIter *iter, LALDict *dict)
{
        iter->dict = dict;
        iter->pos = 0;
        iter->next = NULL;
        return;
}
 
LALDictEntry * XLALDictIterNext(LALDictIter *iter)
{
        while (1) {
 
                if (iter->next) {
                        LALDictEntry *entry = iter->next;
                        iter->next = entry->next;
                        return entry;
                }
 
                /* check end of iteration */
                if (iter->pos >= iter->dict->size)
                        return NULL;
 
                iter->next = iter->dict->hashes[iter->pos++];
        }
        return NULL;
}
 
LALDict * XLALDictDuplicate(LALDict *old)
{
    UINT4 i;
    int retcode;
    if(old==NULL) return NULL;
    LALDict *new = XLALCreateDict();
    if (!new)
        XLAL_ERROR_NULL(XLAL_ENOMEM);
    for (i = 0; i < old->size; ++i) {
        const LALDictEntry *entry;
        for (entry = old->hashes[i]; entry != NULL; entry = entry->next) {
            const char *key = XLALDictEntryGetKey(entry);
            XLAL_TRY(XLALDictInsertValue(new, key, XLALDictEntryGetValue(entry)), retcode);
            if(retcode!=XLAL_SUCCESS)
            {
                XLALDestroyDict(new);
                XLAL_ERROR_NULL(retcode & XLAL_EFUNC);
            }
        }
    }
    return(new);
}
 
LALList * XLALDictKeys(const LALDict *dict)
{
        LALList *list;
        size_t i;
        list = XLALCreateList();
        if (!list)
                XLAL_ERROR_NULL(XLAL_EFUNC);
        for (i = 0; i < dict->size; ++i) {
                const LALDictEntry *entry;
                for (entry = dict->hashes[i]; entry != NULL; entry = entry->next) {
                        const char *key = XLALDictEntryGetKey(entry);
                        if (XLALListAddStringValue(list, key) < 0) {
                                XLALDestroyList(list);
                                XLAL_ERROR_NULL(XLAL_EFUNC);
                        }
                }
        }
        return list;
}
 
LALList * XLALDictValues(const LALDict *dict)
{
        LALList *list;
        size_t i;
        list = XLALCreateList();
        if (!list)
                XLAL_ERROR_NULL(XLAL_EFUNC);
        for (i = 0; i < dict->size; ++i) {
                const LALDictEntry *entry;
                for (entry = dict->hashes[i]; entry != NULL; entry = entry->next) {
                        const LALValue *value = XLALDictEntryGetValue(entry);
                        if (XLALListAddValue(list, value) < 0) {
                                XLALDestroyList(list);
                                XLAL_ERROR_NULL(XLAL_EFUNC);
                        }
                }
        }
        return list;
}
 
int XLALDictContains(const LALDict *dict, const char *key)
{
        const LALDictEntry *entry;
        for (entry = dict->hashes[hash(key) % dict->size]; entry != NULL; entry = entry->next)
                if (strcmp(key, entry->key) == 0)
                        return 1;
        return 0;
}
 
size_t XLALDictSize(const LALDict *dict)
{
        size_t size = 0;
        size_t i;
        for (i = 0; i < dict->size; ++i) {
                const LALDictEntry *entry;
                for (entry = dict->hashes[i]; entry != NULL; entry = entry->next)
                        ++size;
        }
        return size;
}
 
LALDictEntry *XLALDictLookup(LALDict *dict, const char *key)
{
        LALDictEntry *entry;
        for (entry = dict->hashes[hash(key) % dict->size]; entry != NULL; entry = entry->next)
                if (strcmp(key, entry->key) == 0)
                        return entry;
        return NULL;
}
 
int XLALDictRemove(LALDict *dict, const char *key)
{
        size_t hashidx = hash(key) % dict->size;
        LALDictEntry *this = dict->hashes[hashidx];
        LALDictEntry *prev = this;
        while (this) {
                if (strcmp(this->key, key) == 0) { /* found it! */
                        if (prev == this) /* head is removed */
                                dict->hashes[hashidx] = this->next;
                        else
                                prev->next = this->next;
                        if (this->key)
                                LALFree(this->key);
                        LALFree(this);
                        return 0;
                }
                prev = this;
                this = this->next;
        }
        return -1; /* not found */
}
 
int XLALDictInsert(LALDict *dict, const char *key, const void *data, size_t size, LALTYPECODE type)
{
        size_t hashidx = hash(key) % dict->size;
        LALDictEntry *this = dict->hashes[hashidx];
        LALDictEntry *prev = NULL;
        LALDictEntry *entry;
 
        /* see if entry already exists */
        while (this) {
                if (strcmp(this->key, key) == 0) { /* found it! */
                        entry = XLALDictEntryRealloc(this, size);
                        if (entry == NULL)
                                XLAL_ERROR(XLAL_EFUNC);
                        if (entry != this) { /* relink */
                                if (prev == NULL) /* head is moved */
                                        dict->hashes[hashidx] = entry;
                                else
                                        prev->next = entry;
                        }
                        entry = XLALDictEntrySetValue(entry, data, size, type);
 
                        if (entry == NULL)
                                XLAL_ERROR(XLAL_EFUNC);
 
                        return 0;
                }
                prev = this;
                this = this->next;
        }
 
        /* not found: create new entry */
        entry = XLALDictEntryAlloc(size);
        if (entry == NULL)
                XLAL_ERROR(XLAL_EFUNC);
 
        entry = XLALDictEntrySetKey(entry, key);
        if (entry == NULL) {
                LALFree(entry);
                XLAL_ERROR(XLAL_EFUNC);
        }
 
        entry = XLALDictEntrySetValue(entry, data, size, type);
        if (entry == NULL) {
                LALFree(entry);
                XLAL_ERROR(XLAL_EFUNC);
        }
 
        entry->next = dict->hashes[hashidx];
        dict->hashes[hashidx] = entry;
        return 0;
}
 
int XLALDictInsertValue(LALDict *dict, const char *key, const LALValue *value)
{
        LALTYPECODE type = XLALValueGetType(value);
        size_t size = XLALValueGetSize(value);
        const void * data = XLALValueGetDataPtr(value);
        return XLALDictInsert(dict, key, data, size, type);
}
 
int XLALDictInsertBLOBValue(LALDict *dict, const char *key, const void *blob, size_t size)
{
        if (XLALDictInsert(dict, key, blob, size, LAL_UCHAR_TYPE_CODE) < 0)
                XLAL_ERROR(XLAL_EFUNC);
        return 0;
}
 
int XLALDictInsertStringValue(LALDict *dict, const char *key, const char *string)
{
        size_t size = strlen(string) + 1;
        if (XLALDictInsert(dict, key, string, size, LAL_CHAR_TYPE_CODE) < 0)
                XLAL_ERROR(XLAL_EFUNC);
        return 0;
}
 
#define DEFINE_INSERT_FUNC(TYPE, TCODE) \
        int XLALDictInsert ## TYPE ## Value(LALDict *dict, const char *key, TYPE value) \
        { \
                if (XLALDictInsert(dict, key, &value, sizeof(value), TCODE) < 0) \
                        XLAL_ERROR(XLAL_EFUNC); \
                return 0; \
        }
 
DEFINE_INSERT_FUNC(CHAR, LAL_CHAR_TYPE_CODE)
DEFINE_INSERT_FUNC(INT2, LAL_I2_TYPE_CODE)
DEFINE_INSERT_FUNC(INT4, LAL_I4_TYPE_CODE)
DEFINE_INSERT_FUNC(INT8, LAL_I8_TYPE_CODE)
DEFINE_INSERT_FUNC(UCHAR, LAL_UCHAR_TYPE_CODE)
DEFINE_INSERT_FUNC(UINT2, LAL_U2_TYPE_CODE)
DEFINE_INSERT_FUNC(UINT4, LAL_U4_TYPE_CODE)
DEFINE_INSERT_FUNC(UINT8, LAL_U8_TYPE_CODE)
DEFINE_INSERT_FUNC(REAL4, LAL_S_TYPE_CODE)
DEFINE_INSERT_FUNC(REAL8, LAL_D_TYPE_CODE)
DEFINE_INSERT_FUNC(COMPLEX8, LAL_C_TYPE_CODE)
DEFINE_INSERT_FUNC(COMPLEX16, LAL_Z_TYPE_CODE)
 
#undef DEFINE_INSERT_FUNC
 
void * XLALDictLookupBLOBValue(LALDict *dict, const char *key)
{
        LALDictEntry *entry = XLALDictLookup(dict, key);
        const LALValue *value;
        if (entry == NULL)
                XLAL_ERROR_NULL(XLAL_ENAME, "Key `%s' not found", key);
        value = XLALDictEntryGetValue(entry);
        if (value == NULL)
                XLAL_ERROR_NULL(XLAL_EFUNC);
/* FIXME TODO */
        return XLALValueGetBLOB(value);
}
 
/* warning: shallow pointer */
const char * XLALDictLookupStringValue(LALDict *dict, const char *key)
{
        LALDictEntry *entry = XLALDictLookup(dict, key);
        const LALValue *value;
        if (entry == NULL)
                XLAL_ERROR_NULL(XLAL_ENAME, "Key `%s' not found", key);
        value = XLALDictEntryGetValue(entry);
        if (value == NULL)
                XLAL_ERROR_NULL(XLAL_EFUNC);
        return XLALValueGetString(value);
}
 
#define DEFINE_LOOKUP_FUNC(TYPE, FAILVAL) \
        TYPE XLALDictLookup ## TYPE ## Value(LALDict *dict, const char *key) \
        { \
                LALDictEntry *entry; \
                const LALValue *value; \
                entry = XLALDictLookup(dict, key); \
                if (entry == NULL) \
                        XLAL_ERROR_VAL(FAILVAL, XLAL_ENAME, "Key `%s' not found", key); \
                value = XLALDictEntryGetValue(entry); \
                if (value == NULL) \
                        XLAL_ERROR_VAL(FAILVAL, XLAL_EFUNC); \
                return XLALValueGet ## TYPE (value); \
        }
 
DEFINE_LOOKUP_FUNC(CHAR, XLAL_FAILURE)
DEFINE_LOOKUP_FUNC(INT2, XLAL_FAILURE)
DEFINE_LOOKUP_FUNC(INT4, XLAL_FAILURE)
DEFINE_LOOKUP_FUNC(INT8, XLAL_FAILURE)
DEFINE_LOOKUP_FUNC(UCHAR, XLAL_FAILURE)
DEFINE_LOOKUP_FUNC(UINT2, XLAL_FAILURE)
DEFINE_LOOKUP_FUNC(UINT4, XLAL_FAILURE)
DEFINE_LOOKUP_FUNC(UINT8, XLAL_FAILURE)
DEFINE_LOOKUP_FUNC(REAL4, XLAL_REAL4_FAIL_NAN)
DEFINE_LOOKUP_FUNC(REAL8, XLAL_REAL8_FAIL_NAN)
DEFINE_LOOKUP_FUNC(COMPLEX8, XLAL_REAL4_FAIL_NAN)
DEFINE_LOOKUP_FUNC(COMPLEX16, XLAL_REAL8_FAIL_NAN)
 
REAL8 XLALDictLookupValueAsREAL8(LALDict *dict, const char *key)
{
        LALDictEntry *entry;
        const LALValue *value;
        entry = XLALDictLookup(dict, key);
        if (entry == NULL)
                XLAL_ERROR_REAL8(XLAL_ENAME, "Key `%s' not found", key);
        value = XLALDictEntryGetValue(entry);
        if (value == NULL)
                XLAL_ERROR_REAL8(XLAL_EFUNC);
        return XLALValueGetAsREAL8(value);
}
 
struct LALDictAsStringAppendValueFuncParams {char *s; int first;};
 
static void XLALDictAsStringAppendValueFunc(char *key, LALValue *value, void *thunk)
{
        struct LALDictAsStringAppendValueFuncParams *p = (struct LALDictAsStringAppendValueFuncParams *)(thunk);
        if (p->first)
                p->first = 0;
        else
                p->s = XLALStringAppend(p->s, ", ");
        p->s = XLALStringAppendFmt(p->s, "\"%s\": ", key);
        p->s = XLALValueAsStringAppend(p->s, value);
        return;
}
 
char * XLALDictAsStringAppend(char *s, LALDict *list)
{
        struct LALDictAsStringAppendValueFuncParams p = {s, 1};
        p.s = XLALStringAppend(p.s, "{");
        XLALDictForeach(list, XLALDictAsStringAppendValueFunc, &p);
        p.s = XLALStringAppend(p.s, "}");
        return p.s;
}
 
void XLALDictPrint(LALDict *dict, int fd)
{
        char *s = NULL;
        s = XLALDictAsStringAppend(s, dict);
        XLAL_CHECK_VOID(s, XLAL_EFUNC);
#if HAVE_DPRINTF
        dprintf(fd, "%s", s);
#else
        /* hack... */
        switch (fd) {
        case 1:
                fprintf(stdout, "%s", s);
                break;
        case 2:
                fprintf(stderr, "%s", s);
                break;
        default:
                LALFree(s);
                XLAL_ERROR_VOID(XLAL_EIO, "Don't know what to do with file descriptor %d", fd);
        }
#endif
        LALFree(s);
        return;
}