qse/ase/awk/awk.c

203 lines
4.2 KiB
C

/*
* $Id: awk.c,v 1.47 2006-04-24 15:34:52 bacon Exp $
*/
#include <xp/awk/awk_i.h>
#ifndef XP_AWK_STAND_ALONE
#include <xp/bas/memory.h>
#include <xp/bas/assert.h>
#endif
static void __free_func (void* awk, void* func);
xp_awk_t* xp_awk_open (void)
{
xp_awk_t* awk;
awk = (xp_awk_t*) xp_malloc (xp_sizeof(xp_awk_t));
if (awk == XP_NULL) return XP_NULL;
if (xp_str_open(&awk->token.name, 128) == XP_NULL)
{
xp_free (awk);
return XP_NULL;
}
/* TODO: initial map size?? */
if (xp_awk_map_open(&awk->tree.funcs,awk,256,__free_func) == XP_NULL)
{
xp_str_close (&awk->token.name);
xp_free (awk);
return XP_NULL;
}
if (xp_awk_tab_open(&awk->parse.globals) == XP_NULL)
{
xp_str_close (&awk->token.name);
xp_awk_map_close (&awk->tree.funcs);
xp_free (awk);
return XP_NULL;
}
if (xp_awk_tab_open(&awk->parse.locals) == XP_NULL)
{
xp_str_close (&awk->token.name);
xp_awk_map_close (&awk->tree.funcs);
xp_awk_tab_close (&awk->parse.globals);
xp_free (awk);
return XP_NULL;
}
if (xp_awk_tab_open(&awk->parse.params) == XP_NULL)
{
xp_str_close (&awk->token.name);
xp_awk_map_close (&awk->tree.funcs);
xp_awk_tab_close (&awk->parse.globals);
xp_awk_tab_close (&awk->parse.locals);
xp_free (awk);
return XP_NULL;
}
awk->opt.parse = 0;
awk->opt.run = 0;
awk->errnum = XP_AWK_ENOERR;
awk->srcio = XP_NULL;
awk->srcio_arg = XP_NULL;
awk->parse.nlocals_max = 0;
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;
awk->lex.curc = XP_CHAR_EOF;
awk->lex.ungotc_count = 0;
return awk;
}
int xp_awk_close (xp_awk_t* awk)
{
xp_awk_clear (awk);
if (xp_awk_detsrc(awk) == -1) return -1;
xp_awk_map_close (&awk->tree.funcs);
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);
xp_free (awk);
return 0;
}
/* 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??? */
void xp_awk_clear (xp_awk_t* awk)
{
/* TODO: kill all associated run instances... */
xp_awk_tab_clear (&awk->parse.globals);
xp_awk_tab_clear (&awk->parse.locals);
xp_awk_tab_clear (&awk->parse.params);
awk->parse.nlocals_max = 0;
/* clear parse trees */
awk->tree.nglobals = 0;
xp_awk_map_clear (&awk->tree.funcs);
if (awk->tree.begin != XP_NULL)
{
xp_assert (awk->tree.begin->next == XP_NULL);
xp_awk_clrpt (awk->tree.begin);
awk->tree.begin = XP_NULL;
}
if (awk->tree.end != XP_NULL)
{
xp_assert (awk->tree.end->next == XP_NULL);
xp_awk_clrpt (awk->tree.end);
awk->tree.end = XP_NULL;
}
while (awk->tree.chain != XP_NULL)
{
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;
}
void xp_awk_setparseopt (xp_awk_t* awk, int opt)
{
awk->opt.parse = opt;
}
void xp_awk_setrunopt (xp_awk_t* awk, int opt)
{
awk->opt.run = opt;
}
int xp_awk_attsrc (xp_awk_t* awk, xp_awk_io_t src, void* arg)
{
if (xp_awk_detsrc(awk) == -1) return -1;
xp_assert (awk->srcio == XP_NULL);
if (src(XP_AWK_INPUT_OPEN, arg, XP_NULL, 0) == -1)
{
awk->errnum = XP_AWK_ESRCINOPEN;
return -1;
}
awk->srcio = src;
awk->srcio_arg = arg;
awk->lex.curc = XP_CHAR_EOF;
awk->lex.ungotc_count = 0;
return 0;
}
int xp_awk_detsrc (xp_awk_t* awk)
{
if (awk->srcio != XP_NULL)
{
xp_ssize_t n;
n = awk->srcio (XP_AWK_INPUT_CLOSE, awk->srcio_arg, XP_NULL, 0);
if (n == -1)
{
awk->errnum = XP_AWK_ESRCINCLOSE;
return -1;
}
awk->srcio = XP_NULL;
awk->srcio_arg = XP_NULL;
awk->lex.curc = XP_CHAR_EOF;
awk->lex.ungotc_count = 0;
}
return 0;
}
static void __free_func (void* owner, void* func)
{
xp_awk_func_t* f = (xp_awk_func_t*)func;
/* f->name doesn't have to be freed */
/*xp_free (f->name);*/
xp_awk_clrpt (f->body);
xp_free (f);
}