Manual Reference Pages - NAMEALLOC (3)
[Include document man1/alc_contents.mac]
namealloc - hash table for strings
[Include document man1/alc_origin.1]
Pointer to a string of characters
The namealloc function creates a dictionnary of names in mbk.
It warranties equality on characters string if the pointers to these
strings are equal, at strcmp(3) meaning. This means also that there
is a single memory address for a given string.
The case of the letters do not matter. All names are changed to lower case
before beeing introduced in the symbol table. This is needed because most
of the file format do not check case.
namealloc is used by all mbk utility function using names, so its use
should be needed only when directly filling or modifing the structure, or when
having to compare an external string to mbk internal ones. This should speed
up string comparisons.
One shall never modify the contains of a string pointed to by a result of
namealloc, since all the field that points to this name would have
there values modified, and that there is no chance that the new hash code
will be the same as the old one, so pointer comparison would be
meaningless. All string used by namealloc are constants string, and
therefore must be left alone.
namealloc returns a string pointer.
If the inputname is already in the hash table, then its internal pointer
is returned, else a new entry is created, and then the new pointer returned.
name = namealloc(name);
for (p = HEAD_LOFIG; p; p = p->NEXT)
if (p->NAME == name) /* pointer equality */
namealloc can be used only after a call to mbkenv(3).
[Include document man1/alc_bug_report.1]
|ASIM/LIP6 ||NAMEALLOC (3) ||October 1, 1997 |
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