qse/ase/awk/awk.c

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/*
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* $Id: awk.c,v 1.62 2006-07-30 15:53:42 bacon Exp $
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*/
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#include <xp/awk/awk_i.h>
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#ifndef XP_AWK_STAND_ALONE
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#include <xp/bas/memory.h>
#include <xp/bas/assert.h>
#endif
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static void __free_afn (void* awk, void* afn);
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xp_awk_t* xp_awk_open (void)
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{
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xp_awk_t* awk;
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xp_size_t i;
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awk = (xp_awk_t*) xp_malloc (xp_sizeof(xp_awk_t));
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if (awk == XP_NULL) return XP_NULL;
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if (xp_str_open (&awk->token.name, 128) == XP_NULL)
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{
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xp_free (awk);
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return XP_NULL;
}
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/* TODO: initial map size?? */
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if (xp_awk_map_open (
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&awk->tree.afns, awk, 256, __free_afn) == XP_NULL)
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{
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xp_str_close (&awk->token.name);
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xp_free (awk);
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return XP_NULL;
}
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if (xp_awk_tab_open (&awk->parse.globals) == XP_NULL)
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{
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xp_str_close (&awk->token.name);
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xp_awk_map_close (&awk->tree.afns);
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xp_free (awk);
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return XP_NULL;
}
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if (xp_awk_tab_open (&awk->parse.locals) == XP_NULL)
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{
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xp_str_close (&awk->token.name);
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xp_awk_map_close (&awk->tree.afns);
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xp_awk_tab_close (&awk->parse.globals);
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xp_free (awk);
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return XP_NULL;
}
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if (xp_awk_tab_open (&awk->parse.params) == XP_NULL)
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{
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xp_str_close (&awk->token.name);
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xp_awk_map_close (&awk->tree.afns);
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xp_awk_tab_close (&awk->parse.globals);
xp_awk_tab_close (&awk->parse.locals);
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xp_free (awk);
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return XP_NULL;
}
awk->opt.parse = 0;
awk->opt.run = 0;
awk->errnum = XP_AWK_ENOERR;
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awk->srcio = XP_NULL;
awk->srcio_arg = XP_NULL;
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awk->parse.nlocals_max = 0;
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awk->tree.nglobals = 0;
awk->tree.begin = XP_NULL;
awk->tree.end = XP_NULL;
awk->tree.chain = XP_NULL;
awk->tree.chain_tail = XP_NULL;
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awk->token.prev = 0;
awk->token.type = 0;
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awk->token.line = 1;
awk->token.column = 1;
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awk->lex.curc = XP_CHAR_EOF;
awk->lex.ungotc_count = 0;
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awk->lex.buf_pos = 0;
awk->lex.buf_len = 0;
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awk->lex.line = 1;
awk->lex.column = 1;
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for (i = 0; i < xp_countof(awk->extio); i++) awk->extio[i] = XP_NULL;
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awk->bfn.sys = XP_NULL;
awk->bfn.user = XP_NULL;
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return awk;
}
int xp_awk_close (xp_awk_t* awk)
{
xp_awk_clear (awk);
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if (xp_awk_detsrc(awk) == -1) return -1;
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xp_awk_map_close (&awk->tree.afns);
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xp_awk_tab_close (&awk->parse.globals);
xp_awk_tab_close (&awk->parse.locals);
xp_awk_tab_close (&awk->parse.params);
xp_str_close (&awk->token.name);
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xp_free (awk);
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return 0;
}
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/* TODO: write a function to clear awk->parse data structure.
this would be need either as a separate function or as a part of xp_awk_clear...
do i have to pass an option to xp_awk_clear to do this??? */
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void xp_awk_clear (xp_awk_t* awk)
{
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/* TODO: kill all associated run instances... */
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xp_awk_tab_clear (&awk->parse.globals);
xp_awk_tab_clear (&awk->parse.locals);
xp_awk_tab_clear (&awk->parse.params);
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awk->parse.nlocals_max = 0;
/* clear parse trees */
awk->tree.nglobals = 0;
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xp_awk_map_clear (&awk->tree.afns);
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if (awk->tree.begin != XP_NULL)
{
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xp_assert (awk->tree.begin->next == XP_NULL);
xp_awk_clrpt (awk->tree.begin);
awk->tree.begin = XP_NULL;
}
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if (awk->tree.end != XP_NULL)
{
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xp_assert (awk->tree.end->next == XP_NULL);
xp_awk_clrpt (awk->tree.end);
awk->tree.end = XP_NULL;
}
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while (awk->tree.chain != XP_NULL)
{
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xp_awk_chain_t* next = awk->tree.chain->next;
if (awk->tree.chain->pattern != XP_NULL)
xp_awk_clrpt (awk->tree.chain->pattern);
if (awk->tree.chain->action != XP_NULL)
xp_awk_clrpt (awk->tree.chain->action);
xp_free (awk->tree.chain);
awk->tree.chain = next;
}
awk->tree.chain_tail = XP_NULL;
}
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void xp_awk_setparseopt (xp_awk_t* awk, int opt)
{
awk->opt.parse = opt;
}
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void xp_awk_setrunopt (xp_awk_t* awk, int opt)
{
awk->opt.run = opt;
}
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int xp_awk_attsrc (xp_awk_t* awk, xp_awk_io_t handler, void* arg)
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{
if (xp_awk_detsrc(awk) == -1) return -1;
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xp_assert (awk->srcio == XP_NULL);
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if (handler (XP_AWK_IO_OPEN, arg, XP_NULL, 0) == -1)
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{
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awk->errnum = XP_AWK_ESRCINOPEN;
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return -1;
}
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awk->srcio = handler;
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awk->srcio_arg = arg;
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awk->lex.curc = XP_CHAR_EOF;
awk->lex.ungotc_count = 0;
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awk->lex.buf_pos = 0;
awk->lex.buf_len = 0;
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awk->lex.line = 1;
awk->lex.column = 1;
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return 0;
}
int xp_awk_detsrc (xp_awk_t* awk)
{
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if (awk->srcio != XP_NULL)
{
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xp_ssize_t n;
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n = awk->srcio (XP_AWK_IO_CLOSE, awk->srcio_arg, XP_NULL, 0);
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if (n == -1)
{
awk->errnum = XP_AWK_ESRCINCLOSE;
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return -1;
}
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awk->srcio = XP_NULL;
awk->srcio_arg = XP_NULL;
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awk->lex.curc = XP_CHAR_EOF;
awk->lex.ungotc_count = 0;
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awk->lex.buf_pos = 0;
awk->lex.buf_len = 0;
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awk->lex.line = 1;
awk->lex.column = 1;
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}
return 0;
}
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static void __free_afn (void* owner, void* afn)
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{
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xp_awk_afn_t* f = (xp_awk_afn_t*)afn;
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/* f->name doesn't have to be freed */
/*xp_free (f->name);*/
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xp_awk_clrpt (f->body);
xp_free (f);
}
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xp_size_t xp_awk_getsrcline (xp_awk_t* awk)
{
return awk->token.line;
}
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/* TODO: imrove this... should it close io when it is overridden with a new handler??? */
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int xp_awk_setextio (xp_awk_t* awk, int id, xp_awk_io_t handler, void* arg)
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{
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if (id < 0 || id >= xp_countof(awk->extio))
{
awk->errnum = XP_AWK_EINVAL;
return -1;
}
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awk->extio[id] = handler;
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return 0;
}