.TH dictModifyValue 3 "12 July 2007" "ClearSilver" "util/dict.h"

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.SH NAME
dictModifyValue  - create/modify an item.
.SH SYNOPSIS
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#include <util/dict.h>
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NEOERR *dictModifyValue(dictCtx dict, const char *id, dictNewValueCB new_cb, 
                     dictUpdateValueCB update, void *rock);

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.SH ARGUMENTS
dict - dictionary to add pair to.
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id - identifier of value
.br
new - function to call to create new value (may be NULL)
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update - function to call to modify value (if NULL, the old
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value is freed, and <new> is used)
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rock - context to pass to <new> or <update>.

.SH DESCRIPTION
Finds <id>'s value and calls <update>.  If <id> is
not in <dict>, calls <new> to obtain a new value.

MT-Level: Safe if <dict> thread-safe.

.SH "RETURN VALUE"
None.

.SH "SEE ALSO"
.BR dictDestroy "(3), "dictCleanup "(3), "dictReleaseLock "(3), "dictRemove "(3), "dictNext "(3), "dictCreate "(3), "dictSetValue "(3), "dictModifyValue "(3), "dictSearch