STIO(3X)                                                              STIO(3X)



NAME
     stio - routines that provide a binary read/write interface to the MIPS
     symbol table

SYNOPSIS
     #include <syms.h>

     long streadbinary(char *filename, char how);

     long streadst(long fn, char how, long fbase, pCHDRR pchdr, long flags);

     void stwritebinary(char *filename, long flags);

     void stwritest(long fn, long flags);

DESCRIPTION
     The CHDRR structure (see <cmplrs/stsupport.h> and the stcu manual page)
     represents a symbol table in memory.  A new CHDRR can be created by
     reading a symbol table in from disk.  St_readbinary and st_readst read a
     symbol table in from disk.

     St_readbinary takes the file name of the symbol table and assumes the
     symbol table header (HDRR in <sym.h>) occurs at the beginning of the
     file. St_readst assumes that its file number references a file positioned
     at the beginning of the symbol table header and that the fbase parameter
     specifies where the object or symbol table file is based (for example,
     non-zero for archives).

     The second parameter to the read routines can be `r' for read only or `a'
     for appending to the symbol table. Existing local symbol, line,
     procedure, auxiliary, optimization, and local string tables can not be
     appended. If they didn't exist on disk, they can be created. This
     restriction stems from the allocation algorithm for those symbol table
     sections when read in from disk and follows the standard pattern for
     building the symbol table.

     The symbol table can be read incrementally.  If pchdr is zero, st_readst
     assumes that no symbol table has been read yet; therefore, it reads in
     the symbol table header and file descriptors.  The flags argument is a
     bit mask that defines what other tables should be read. St_p* constants
     for each table, defined in <cmplrs/stsupport.h>, can be ORed.  If flags
     equals `-1', all tables are read.  If pchdr is set, the tables specified
     by flags are added to the tables that have already been read.  Pchdr's
     value can be gotten from st_current_pchdr.  See stcu(3).

     Line number entries are encoded on disk, the read routines expand them to
     longs.  See the MIPS System Programmer Guide.

     If the version stamp is out of date, a warning message is issued to
     stderr.  If the magic number in the HDRR is incorrect, st_error is
     called.  All other errors cause the read routines to read non-zero;
     otherwise, a zero is returned.



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STIO(3X)                                                              STIO(3X)



     St_writebinary and st_writest are symmetric to the read routines,
     excluding the how and pchdr parameters. The flags parameter is a bit mask
     that defines what table should be written. St_p* constants for each
     table, defined in <cmplrs/stsupport.h>, can be ORed. If flags equals `-
     1', all tables are written.

     The write routines write sections of the table in the approved order, as
     specified in the link editor (ld) specification.

     Line numbers are compressed on disk.  See the MIPS System Programmer
     Guide.

     The write routines start all sections of the symbol table on four-byte
     boundaries.

     If the write routines encounter an error, st_error is called. After
     writing the symbol table, further access to the table by other routines
     is undefined.

     The programs must be loaded with the object file access routine library
     libmld.a.

SEE ALSO
     stcu(3x), stfe(3x), stfd(3x)































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