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/**
* \file lib/tagname.c
*/
#include "system.h"
#include <rpm/header.h>
#include <rpm/rpmstring.h>
#include "debug.h"
/** \ingroup header
* Associate tag names with numeric values.
*/
typedef const struct headerTagTableEntry_s * headerTagTableEntry;
struct headerTagTableEntry_s {
const char * name; /*!< Tag name. */
const char * shortname; /*!< "Human readable" short name. */
rpmTag val; /*!< Tag numeric value. */
rpmTagType type; /*!< Tag type. */
int extension; /*!< Extension or "real" tag */
};
#include "lib/tagtbl.c"
static const int rpmTagTableSize = sizeof(rpmTagTable) / sizeof(rpmTagTable[0]) - 1;
/**
*/
typedef struct headerTagIndices_s * headerTagIndices;
struct headerTagIndices_s {
int (*loadIndex) (headerTagTableEntry ** ipp, int * np,
int (*cmp) (const void * avp, const void * bvp));
/*!< load sorted tag index. */
headerTagTableEntry * byName; /*!< header tags sorted by name. */
int byNameSize; /*!< no. of entries. */
int (*byNameCmp) (const void * avp, const void * bvp); /*!< compare entries by name. */
rpmTag (*tagValue) (const char * name); /* return value from name. */
headerTagTableEntry * byValue; /*!< header tags sorted by value. */
int byValueSize; /*!< no. of entries. */
int (*byValueCmp) (const void * avp, const void * bvp); /*!< compare entries by value. */
const char * (*tagName) (rpmTag value); /* Return name from value. */
rpmTagType (*tagType) (rpmTag value); /* Return type from value. */
};
/**
* Compare tag table entries by name.
* @param *avp tag table entry a
* @param *bvp tag table entry b
* @return comparison
*/
static int tagCmpName(const void * avp, const void * bvp)
{
headerTagTableEntry a = *(const headerTagTableEntry *) avp;
headerTagTableEntry b = *(const headerTagTableEntry *) bvp;
return strcmp(a->name, b->name);
}
/**
* Compare tag table entries by value.
* @param *avp tag table entry a
* @param *bvp tag table entry b
* @return comparison
*/
static int tagCmpValue(const void * avp, const void * bvp)
{
headerTagTableEntry a = *(const headerTagTableEntry *) avp;
headerTagTableEntry b = *(const headerTagTableEntry *) bvp;
int ret = (a->val - b->val);
/* Make sure that sort is stable, longest name first. */
if (ret == 0)
ret = (strlen(b->name) - strlen(a->name));
return ret;
}
/**
* Load/sort a tag index.
* @retval *ipp tag index
* @retval *np no. of tags
* @param cmp sort compare routine
* @return 0 always
*/
static int tagLoadIndex(headerTagTableEntry ** ipp, int * np,
int (*cmp) (const void * avp, const void * bvp))
{
headerTagTableEntry tte, *ip;
int n = 0;
ip = xcalloc(rpmTagTableSize, sizeof(*ip));
n = 0;
for (tte = (headerTagTableEntry)rpmTagTable; tte->name != NULL; tte++) {
ip[n] = tte;
n++;
}
assert(n == rpmTagTableSize);
if (n > 1)
qsort(ip, n, sizeof(*ip), cmp);
*ipp = ip;
*np = n;
return 0;
}
/* forward refs */
static const char * _tagName(rpmTag tag);
static rpmTagType _tagType(rpmTag tag);
static rpmTag _tagValue(const char * tagstr);
static struct headerTagIndices_s _rpmTags = {
tagLoadIndex,
NULL, 0, tagCmpName, _tagValue,
NULL, 0, tagCmpValue, _tagName, _tagType,
};
static headerTagIndices const rpmTags = &_rpmTags;
static const char * _tagName(rpmTag tag)
{
const char *name = "(unknown)";
const struct headerTagTableEntry_s *t;
int comparison, i, l, u;
int xx;
if (_rpmTags.byValue == NULL)
xx = tagLoadIndex(&_rpmTags.byValue, &_rpmTags.byValueSize, tagCmpValue);
switch (tag) {
case RPMDBI_PACKAGES:
name = "Packages";
break;
case RPMDBI_DEPENDS:
name = "Depends";
break;
case RPMDBI_ADDED:
name = "Added";
break;
case RPMDBI_REMOVED:
name = "Removed";
break;
case RPMDBI_AVAILABLE:
name = "Available";
break;
case RPMDBI_HDLIST:
name = "Hdlist";
break;
case RPMDBI_ARGLIST:
name = "Arglist";
break;
case RPMDBI_FTSWALK:
name = "Ftswalk";
break;
/* XXX make sure rpmdb indices are identically named. */
case RPMTAG_CONFLICTS:
name = "Conflictname";
break;
case RPMTAG_HDRID:
name = "Sha1header";
break;
default:
if (_rpmTags.byValue == NULL)
break;
l = 0;
u = _rpmTags.byValueSize;
while (l < u) {
i = (l + u) / 2;
t = _rpmTags.byValue[i];
comparison = (tag - t->val);
if (comparison < 0)
u = i;
else if (comparison > 0)
l = i + 1;
else {
/* Make sure that the bsearch retrieve is stable. */
while (i > 0 && tag == _rpmTags.byValue[i-1]->val) {
i--;
}
t = _rpmTags.byValue[i];
if (t->shortname != NULL)
name = t->shortname;
break;
}
}
break;
}
return name;
}
static rpmTagType _tagType(rpmTag tag)
{
const struct headerTagTableEntry_s *t;
int comparison, i, l, u;
int xx;
if (_rpmTags.byValue == NULL)
xx = tagLoadIndex(&_rpmTags.byValue, &_rpmTags.byValueSize, tagCmpValue);
switch (tag) {
case RPMDBI_PACKAGES:
case RPMDBI_DEPENDS:
case RPMDBI_ADDED:
case RPMDBI_REMOVED:
case RPMDBI_AVAILABLE:
case RPMDBI_HDLIST:
case RPMDBI_ARGLIST:
case RPMDBI_FTSWALK:
break;
default:
if (_rpmTags.byValue == NULL)
break;
l = 0;
u = _rpmTags.byValueSize;
while (l < u) {
i = (l + u) / 2;
t = _rpmTags.byValue[i];
comparison = (tag - t->val);
if (comparison < 0)
u = i;
else if (comparison > 0)
l = i + 1;
else {
/* Make sure that the bsearch retrieve is stable. */
while (i > 0 && t->val == _rpmTags.byValue[i-1]->val) {
i--;
}
t = _rpmTags.byValue[i];
return t->type;
}
}
break;
}
return RPM_NULL_TYPE;
}
static rpmTag _tagValue(const char * tagstr)
{
const struct headerTagTableEntry_s *t;
int comparison, i, l, u;
int xx;
if (!rstrcasecmp(tagstr, "Packages"))
return RPMDBI_PACKAGES;
if (!rstrcasecmp(tagstr, "Depends"))
return RPMDBI_DEPENDS;
if (!rstrcasecmp(tagstr, "Added"))
return RPMDBI_ADDED;
if (!rstrcasecmp(tagstr, "Removed"))
return RPMDBI_REMOVED;
if (!rstrcasecmp(tagstr, "Available"))
return RPMDBI_AVAILABLE;
if (!rstrcasecmp(tagstr, "Hdlist"))
return RPMDBI_HDLIST;
if (!rstrcasecmp(tagstr, "Arglist"))
return RPMDBI_ARGLIST;
if (!rstrcasecmp(tagstr, "Ftswalk"))
return RPMDBI_FTSWALK;
if (_rpmTags.byName == NULL)
xx = tagLoadIndex(&_rpmTags.byName, &_rpmTags.byNameSize, tagCmpName);
if (_rpmTags.byName == NULL)
return RPMTAG_NOT_FOUND;
l = 0;
u = _rpmTags.byNameSize;
while (l < u) {
i = (l + u) / 2;
t = _rpmTags.byName[i];
comparison = rstrcasecmp(tagstr, t->shortname);
if (comparison < 0)
u = i;
else if (comparison > 0)
l = i + 1;
else
return t->val;
}
return RPMTAG_NOT_FOUND;
}
const char * rpmTagGetName(rpmTag tag)
{
return ((*rpmTags->tagName)(tag));
}
rpmTagType rpmTagGetType(rpmTag tag)
{
return ((*rpmTags->tagType)(tag));
}
rpmTagClass rpmTagTypeGetClass(rpmTagType type)
{
rpmTagClass class;
switch (type & RPM_MASK_TYPE) {
case RPM_CHAR_TYPE:
case RPM_INT8_TYPE:
case RPM_INT16_TYPE:
case RPM_INT32_TYPE:
case RPM_INT64_TYPE:
class = RPM_NUMERIC_CLASS;
break;
case RPM_STRING_TYPE:
case RPM_STRING_ARRAY_TYPE:
case RPM_I18NSTRING_TYPE:
class = RPM_STRING_CLASS;
break;
case RPM_BIN_TYPE:
class = RPM_BINARY_CLASS;
break;
case RPM_NULL_TYPE:
default:
class = RPM_NULL_CLASS;
break;
}
return class;
}
rpmTagClass rpmTagGetClass(rpmTag tag)
{
return rpmTagTypeGetClass(rpmTagGetType(tag));
}
rpmTag rpmTagGetValue(const char * tagstr)
{
return ((*rpmTags->tagValue)(tagstr));
}
int rpmTagGetNames(rpmtd tagnames, int fullname)
{
const char **names;
const char *name;
if (_rpmTags.byName == NULL)
tagLoadIndex(&_rpmTags.byName, &_rpmTags.byNameSize, tagCmpName);
if (tagnames == NULL ||_rpmTags.byName == NULL)
return 0;
rpmtdReset(tagnames);
tagnames->count = _rpmTags.byNameSize;
tagnames->data = names = xmalloc(tagnames->count * sizeof(*names));
tagnames->type = RPM_STRING_ARRAY_TYPE;
tagnames->flags = RPMTD_ALLOCED | RPMTD_IMMUTABLE;
for (int i = 0; i < tagnames->count; i++) {
name = fullname ? _rpmTags.byName[i]->name :
_rpmTags.byName[i]->shortname;
names[i] = name;
}
return tagnames->count;
}
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