atom: Coding-style cleanup and refactor
Some coding style nits were cleaned up. Additionally, most of the functions have been collapsed from the libxkbfile version where there's distinction with the Xlib atom functions when Display was set. Finally, the InitAtoms function tests whether the table has already been created by testing the pointer rather than using a static int.master
parent
c88c0ba725
commit
433a405c98
177
src/atom.c
177
src/atom.c
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@ -79,129 +79,120 @@ SOFTWARE.
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#define InitialTableSize 100
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typedef struct _Node {
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struct _Node *left, *right;
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Atom a;
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unsigned int fingerPrint;
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char *string;
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struct _Node *left, *right;
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Atom a;
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unsigned int fingerPrint;
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char *string;
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} NodeRec, *NodePtr;
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#define BAD_RESOURCE 0xe0000000
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static Atom lastAtom = None;
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static NodePtr atomRoot = (NodePtr)NULL;
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static NodePtr atomRoot = NULL;
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static unsigned long tableLength;
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static NodePtr *nodeTable;
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static void
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_XkbInitAtoms(void)
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{
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tableLength = InitialTableSize;
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nodeTable = (NodePtr *)_XkbAlloc(InitialTableSize*sizeof(NodePtr));
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nodeTable[None] = (NodePtr)NULL;
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}
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static NodePtr *nodeTable = NULL;
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void
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XkbcInitAtoms(void)
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{
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static int been_here= 0;
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if (!been_here) {
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_XkbInitAtoms();
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been_here= 1;
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}
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return;
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}
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if (nodeTable)
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return;
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static char *
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_XkbNameForAtom(Atom atom)
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{
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NodePtr node;
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if (atom > lastAtom) return NULL;
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if ((node = nodeTable[atom]) == (NodePtr)NULL) return NULL;
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return strdup(node->string);
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tableLength = InitialTableSize;
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nodeTable = (NodePtr *)_XkbAlloc(InitialTableSize * sizeof(NodePtr));
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nodeTable[None] = NULL;
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}
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char *
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XkbcAtomGetString(Atom atm)
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XkbcAtomGetString(Atom atom)
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{
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if (atm==None)
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return NULL;
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return _XkbNameForAtom(atm);
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NodePtr node;
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if ((atom == None) || (atom > lastAtom))
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return NULL;
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if (!(node = nodeTable[atom]))
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return NULL;
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return strdup(node->string);
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}
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static Atom
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_XkbMakeAtom(char *string,unsigned len,Bool makeit)
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_XkbcMakeAtom(char *string, unsigned len, Bool makeit)
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{
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register NodePtr * np;
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NodePtr *np;
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unsigned i;
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int comp;
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register unsigned int fp = 0;
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int comp;
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unsigned int fp = 0;
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np = &atomRoot;
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for (i = 0; i < (len+1)/2; i++)
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{
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fp = fp * 27 + string[i];
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fp = fp * 27 + string[len - 1 - i];
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for (i = 0; i < (len + 1) / 2; i++) {
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fp = fp * 27 + string[i];
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fp = fp * 27 + string[len - 1 - i];
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}
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while (*np != (NodePtr) NULL)
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{
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if (fp < (*np)->fingerPrint)
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np = &((*np)->left);
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else if (fp > (*np)->fingerPrint)
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np = &((*np)->right);
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else
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{ /* now start testing the strings */
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comp = strncmp(string, (*np)->string, (int)len);
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if ((comp < 0) || ((comp == 0) && (len < strlen((*np)->string))))
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np = &((*np)->left);
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else if (comp > 0)
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np = &((*np)->right);
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else
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return(*np)->a;
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}
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while (*np) {
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if (fp < (*np)->fingerPrint)
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np = &((*np)->left);
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else if (fp > (*np)->fingerPrint)
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np = &((*np)->right);
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else {
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/* now start testing the strings */
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comp = strncmp(string, (*np)->string, (int)len);
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if ((comp < 0) || ((comp == 0) && (len < strlen((*np)->string))))
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np = &((*np)->left);
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else if (comp > 0)
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np = &((*np)->right);
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else
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return(*np)->a;
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}
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}
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if (makeit)
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{
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register NodePtr nd;
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nd = (NodePtr) _XkbAlloc(sizeof(NodeRec));
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if (!nd)
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return BAD_RESOURCE;
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nd->string = (char *) _XkbAlloc(len + 1);
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if (!nd->string) {
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_XkbFree(nd);
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return BAD_RESOURCE;
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}
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strncpy(nd->string, string, (int)len);
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nd->string[len] = 0;
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if ((lastAtom + 1) >= tableLength) {
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NodePtr *table;
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if (makeit) {
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NodePtr nd;
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table = (NodePtr *) _XkbRealloc(nodeTable,
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tableLength * (2 * sizeof(NodePtr)));
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if (!table) {
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if (nd->string != string)
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_XkbFree(nd->string);
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_XkbFree(nd);
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return BAD_RESOURCE;
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}
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tableLength <<= 1;
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nodeTable = table;
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}
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*np = nd;
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nd->left = nd->right = (NodePtr) NULL;
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nd->fingerPrint = fp;
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nd->a = (++lastAtom);
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*(nodeTable+lastAtom) = nd;
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return nd->a;
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nd = (NodePtr)_XkbAlloc(sizeof(NodeRec));
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if (!nd)
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return BAD_RESOURCE;
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nd->string = (char *)_XkbAlloc(len + 1);
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if (!nd->string) {
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_XkbFree(nd);
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return BAD_RESOURCE;
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}
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strncpy(nd->string, string, (int)len);
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nd->string[len] = 0;
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if ((lastAtom + 1) >= tableLength) {
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NodePtr *table;
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table = (NodePtr *)_XkbRealloc(nodeTable,
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tableLength * 2 * sizeof(NodePtr));
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if (!table) {
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if (nd->string != string)
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_XkbFree(nd->string);
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_XkbFree(nd);
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return BAD_RESOURCE;
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}
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tableLength <<= 1;
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nodeTable = table;
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}
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*np = nd;
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nd->left = nd->right = NULL;
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nd->fingerPrint = fp;
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nd->a = (++lastAtom);
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*(nodeTable + lastAtom) = nd;
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return nd->a;
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}
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else
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return None;
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return None;
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}
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Atom
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XkbcInternAtom(char *name,Bool onlyIfExists)
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XkbcInternAtom(char *name, Bool onlyIfExists)
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{
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if (name==NULL)
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return None;
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return _XkbMakeAtom(name, strlen(name), (!onlyIfExists));
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if (!name)
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return None;
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return _XkbcMakeAtom(name, strlen(name), !onlyIfExists);
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}
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