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qse/ase/awk/extio.c

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/*
* $Id: extio.c,v 1.36 2006-08-27 15:29:20 bacon Exp $
*/
#include <xp/awk/awk_i.h>
#ifndef XP_AWK_STAND_ALONE
#include <xp/bas/assert.h>
#include <xp/bas/string.h>
#include <xp/bas/memory.h>
#endif
enum
{
__MASK_READ = 0x0100,
__MASK_WRITE = 0x0200,
__MASK_RDWR = 0x0400,
__MASK_CLEAR = 0x00FF
};
static int __in_type_map[] =
{
/* the order should match the order of the
* XP_AWK_IN_XXX values in tree.h */
XP_AWK_EXTIO_PIPE,
XP_AWK_EXTIO_COPROC,
XP_AWK_EXTIO_FILE,
XP_AWK_EXTIO_CONSOLE
};
static int __in_mode_map[] =
{
/* the order should match the order of the
* XP_AWK_IN_XXX values in tree.h */
XP_AWK_IO_PIPE_READ,
0,
XP_AWK_IO_FILE_READ,
XP_AWK_IO_CONSOLE_READ
};
static int __in_mask_map[] =
{
__MASK_READ,
__MASK_RDWR,
__MASK_READ,
__MASK_READ
};
static int __out_type_map[] =
{
/* the order should match the order of the
* XP_AWK_OUT_XXX values in tree.h */
XP_AWK_EXTIO_PIPE,
XP_AWK_EXTIO_COPROC,
XP_AWK_EXTIO_FILE,
XP_AWK_EXTIO_FILE,
XP_AWK_EXTIO_CONSOLE
};
static int __out_mode_map[] =
{
/* the order should match the order of the
* XP_AWK_OUT_XXX values in tree.h */
XP_AWK_IO_PIPE_WRITE,
0,
XP_AWK_IO_FILE_WRITE,
XP_AWK_IO_FILE_APPEND,
XP_AWK_IO_CONSOLE_WRITE
};
static int __out_mask_map[] =
{
__MASK_WRITE,
__MASK_RDWR,
__MASK_WRITE,
__MASK_WRITE,
__MASK_WRITE
};
static int __writeextio (
xp_awk_run_t* run, int out_type,
const xp_char_t* name, xp_awk_val_t* v, xp_bool_t nl);
int xp_awk_readextio (
xp_awk_run_t* run, int in_type,
const xp_char_t* name, xp_str_t* buf)
{
xp_awk_extio_t* p = run->extio.chain;
xp_awk_io_t handler;
int extio_type, extio_mode, extio_mask, n, ret;
xp_awk_val_t* rs;
xp_char_t* rs_ptr;
xp_size_t rs_len;
xp_size_t line_len = 0;
xp_assert (in_type >= 0 && in_type <= xp_countof(__in_type_map));
xp_assert (in_type >= 0 && in_type <= xp_countof(__in_mode_map));
xp_assert (in_type >= 0 && in_type <= xp_countof(__in_mask_map));
/* translate the in_type into the relevant extio type and mode */
extio_type = __in_type_map[in_type];
extio_mode = __in_mode_map[in_type];
extio_mask = __in_mask_map[in_type];
handler = run->extio.handler[extio_type];
if (handler == XP_NULL)
{
/* no io handler provided */
run->errnum = XP_AWK_EIOIMPL; /* TODO: change the error code */
return -1;
}
while (p != XP_NULL)
{
if (p->type == (extio_type | extio_mask) &&
xp_strcmp(p->name,name) == 0) break;
p = p->next;
}
if (p == XP_NULL)
{
p = (xp_awk_extio_t*) xp_malloc (xp_sizeof(xp_awk_extio_t));
if (p == XP_NULL)
{
run->errnum = XP_AWK_ENOMEM;
return -1;
}
p->name = xp_strdup (name);
if (p->name == XP_NULL)
{
xp_free (p);
run->errnum = XP_AWK_ENOMEM;
return -1;
}
p->type = (extio_type | extio_mask);
p->mode = extio_mode;
p->handle = XP_NULL;
p->in.buf[0] = XP_T('\0');
p->in.pos = 0;
p->in.len = 0;
p->in.eof = xp_false;
p->next = XP_NULL;
n = handler (XP_AWK_IO_OPEN, p, XP_NULL, 0);
if (n == -1)
{
xp_free (p->name);
xp_free (p);
/* TODO: use meaningful error code */
if (xp_awk_setglobal (
run, XP_AWK_GLOBAL_ERRNO,
xp_awk_val_one) == -1) return -1;
run->errnum = XP_AWK_EIOHANDLER;
return -1;
}
/* chain it */
p->next = run->extio.chain;
run->extio.chain = p;
/* n == 0 indicates that it has reached the end of input.
* the user io handler can return 0 for the open request
* if it doesn't have any files to open. One advantage
* of doing this would be that you can skip the entire
* pattern-block matching and exeuction. */
if (n == 0) return 0;
}
/* ready to read a line */
xp_str_clear (buf);
/* get the record separator */
rs = xp_awk_getglobal (run, XP_AWK_GLOBAL_RS);
xp_awk_refupval (rs);
if (rs->type == XP_AWK_VAL_NIL)
{
rs_ptr = XP_NULL;
rs_len = 0;
}
else if (rs->type == XP_AWK_VAL_STR)
{
rs_ptr = ((xp_awk_val_str_t*)rs)->buf;
rs_len = ((xp_awk_val_str_t*)rs)->len;
}
else
{
rs_ptr = xp_awk_valtostr (
rs, &run->errnum, xp_true, XP_NULL, &rs_len);
if (rs_ptr == XP_NULL)
{
xp_awk_refdownval (run, rs);
return -1;
}
}
ret = 1;
/* call the io handler */
while (1)
{
xp_char_t c;
if (p->in.pos >= p->in.len)
{
xp_ssize_t n;
if (p->in.eof)
{
if (XP_STR_LEN(buf) == 0) ret = 0;
break;
}
n = handler (XP_AWK_IO_READ, p,
p->in.buf, xp_countof(p->in.buf));
if (n == -1)
{
/* handler error. getline should return -1 */
/* TODO: use meaningful error code */
if (xp_awk_setglobal (
run, XP_AWK_GLOBAL_ERRNO,
xp_awk_val_one) == -1)
{
ret = -1;
}
else
{
run->errnum = XP_AWK_EIOHANDLER;
ret = -1;
}
break;
}
if (n == 0)
{
p->in.eof = xp_true;
if (XP_STR_LEN(buf) == 0) ret = 0;
break;
}
p->in.len = n;
p->in.pos = 0;
}
c = p->in.buf[p->in.pos++];
if (rs_ptr == XP_NULL)
{
/* separate by a new line */
if (c == XP_T('\n')) break;
}
else if (rs_len == 0)
{
/* separate by a blank line */
/* TODO: handle different line terminator like \r\n */
if (line_len == 0 && c == XP_T('\n'))
{
if (XP_STR_LEN(buf) <= 0)
{
/* if the record is empty when a blank
* line is encountered, the line
* terminator should not be added to
* the record */
continue;
}
/* when a blank line is encountered,
* it needs to snip off the line
* terminator of the previous line */
/* TODO: handle different line terminator like \r\n */
XP_STR_LEN(buf) -= 1;
break;
}
}
else if (rs_len == 1)
{
if (c == rs_ptr[0]) break;
}
else
{
#if 0
xp_char_t* match_ptr;
xp_size_t match_len;
/* TODO: */
/* regular expression */
/* TODO: safematchrex ?? */
n = xp_awk_matchrex (rs_rex,
XP_STR_BUF(buf), XP_STR_LEN(buf),
&match_ptr, &match_len, errnum);
if (n == -1)
{
ret = -1;
break;
}
if (n == 1)
{
/* matched... */
/* DO SOMTHING */
}
#endif
}
if (xp_str_ccat (buf, c) == (xp_size_t)-1)
{
run->errnum = XP_AWK_ENOMEM;
ret = -1;
break;
}
/* TODO: handle difference line terminator like \r\n */
if (c == XP_T('\n')) line_len = 0;
else line_len = line_len + 1;
}
if (rs_ptr != XP_NULL && rs->type != XP_AWK_VAL_STR) xp_free (rs_ptr);
xp_awk_refdownval (run, rs);
return ret;
}
int xp_awk_writeextio (
xp_awk_run_t* run, int out_type,
const xp_char_t* name, xp_awk_val_t* v)
{
return __writeextio (run, out_type, name, v, xp_false);
}
int xp_awk_writeextio_nl (
xp_awk_run_t* run, int out_type,
const xp_char_t* name, xp_awk_val_t* v)
{
return __writeextio (run, out_type, name, v, xp_true);
}
static int __writeextio (
xp_awk_run_t* run, int out_type,
const xp_char_t* name, xp_awk_val_t* v, xp_bool_t nl)
{
xp_awk_extio_t* p = run->extio.chain;
xp_awk_io_t handler;
xp_char_t* str;
xp_size_t len;
int extio_type, extio_mode, extio_mask, n;
xp_assert (out_type >= 0 && out_type <= xp_countof(__out_type_map));
xp_assert (out_type >= 0 && out_type <= xp_countof(__out_mode_map));
xp_assert (out_type >= 0 && out_type <= xp_countof(__out_mask_map));
/* translate the out_type into the relevant extio type and mode */
extio_type = __out_type_map[out_type];
extio_mode = __out_mode_map[out_type];
extio_mask = __out_mask_map[out_type];
handler = run->extio.handler[extio_type];
if (handler == XP_NULL)
{
/* no io handler provided */
run->errnum = XP_AWK_EIOIMPL; /* TODO: change the error code */
return -1;
}
if (v->type == XP_AWK_VAL_STR)
{
str = ((xp_awk_val_str_t*)v)->buf;
len = ((xp_awk_val_str_t*)v)->len;
}
else
{
/* convert the value to string representation first */
/* TOOD: consider using a shared buffer when calling
* xp_awk_valtostr. maybe run->shared_buf.extio */
str = xp_awk_valtostr (
v, &run->errnum, xp_true, NULL, &len);
if (str == XP_NULL) return -1;
}
/* look for the corresponding extio for name */
while (p != XP_NULL)
{
/* the file "1.tmp", in the following code snippets,
* would be opened by the first print statement, but not by
* the second print statement. this is because
* both XP_AWK_OUT_FILE and XP_AWK_OUT_FILE_APPEND are
* translated to XP_AWK_EXTIO_FILE and it is used to
* keep track of file handles..
*
* print "1111" >> "1.tmp"
* print "1111" > "1.tmp"
*/
if (p->type == (extio_type | extio_mask) &&
xp_strcmp (p->name, name) == 0) break;
p = p->next;
}
/* if there is not corresponding extio for name, create one */
if (p == XP_NULL)
{
p = (xp_awk_extio_t*) xp_malloc (xp_sizeof(xp_awk_extio_t));
if (p == XP_NULL)
{
if (v->type != XP_AWK_VAL_STR) xp_free (str);
run->errnum = XP_AWK_ENOMEM;
return -1;
}
p->name = xp_strdup (name);
if (p->name == XP_NULL)
{
xp_free (p);
if (v->type != XP_AWK_VAL_STR) xp_free (str);
run->errnum = XP_AWK_ENOMEM;
return -1;
}
p->type = (extio_type | extio_mask);
p->mode = extio_mode;
p->handle = XP_NULL;
p->next = XP_NULL;
n = handler (XP_AWK_IO_OPEN, p, XP_NULL, 0);
if (n == -1)
{
xp_free (p->name);
xp_free (p);
if (v->type != XP_AWK_VAL_STR) xp_free (str);
/* TODO: use meaningful error code */
if (xp_awk_setglobal (
run, XP_AWK_GLOBAL_ERRNO,
xp_awk_val_one) == -1) return -1;
run->errnum = XP_AWK_EIOHANDLER;
return -1;
}
/* chain it */
p->next = run->extio.chain;
run->extio.chain = p;
/* read the comment in xp_awk_readextio */
if (n == 0) return 0;
}
/* TODO: */
/* TODO: */
/* TODO: if write handler returns less than the request, loop */
/* TODO: */
/* TODO: */
if (len > 0)
{
n = handler (XP_AWK_IO_WRITE, p, str, len);
if (n == -1)
{
if (v->type != XP_AWK_VAL_STR) xp_free (str);
/* TODO: use meaningful error code */
if (xp_awk_setglobal (
run, XP_AWK_GLOBAL_ERRNO,
xp_awk_val_one) == -1) return -1;
run->errnum = XP_AWK_EIOHANDLER;
return -1;
}
if (n == 0)
{
if (v->type != XP_AWK_VAL_STR) xp_free (str);
return 0;
}
}
if (v->type != XP_AWK_VAL_STR) xp_free (str);
if (nl)
{
/* TODO: use proper NEWLINE separator */
n = handler (XP_AWK_IO_WRITE, p, XP_T("\n"), 1);
if (n == -1)
{
/* TODO: use meaningful error code */
if (xp_awk_setglobal (
run, XP_AWK_GLOBAL_ERRNO,
xp_awk_val_one) == -1) return -1;
run->errnum = XP_AWK_EIOHANDLER;
return -1;
}
if (n == 0) return 0;
}
return 1;
}
int xp_awk_flushextio (
xp_awk_run_t* run, int out_type, const xp_char_t* name)
{
xp_awk_extio_t* p = run->extio.chain;
xp_awk_io_t handler;
int extio_type, extio_mode, extio_mask, n;
xp_bool_t ok = xp_false;
xp_assert (out_type >= 0 && out_type <= xp_countof(__out_type_map));
xp_assert (out_type >= 0 && out_type <= xp_countof(__out_mode_map));
xp_assert (out_type >= 0 && out_type <= xp_countof(__out_mask_map));
/* translate the out_type into the relevant extio type and mode */
extio_type = __out_type_map[out_type];
extio_mode = __out_mode_map[out_type];
extio_mask = __out_mask_map[out_type];
handler = run->extio.handler[extio_type];
if (handler == XP_NULL)
{
/* no io handler provided */
run->errnum = XP_AWK_EIOIMPL; /* TODO: change the error code */
return -1;
}
/* look for the corresponding extio for name */
while (p != XP_NULL)
{
if (p->type == (extio_type | extio_mask) &&
(name == XP_NULL || xp_strcmp (p->name, name) == 0))
{
n = handler (XP_AWK_IO_FLUSH, p, XP_NULL, 0);
if (n == -1)
{
/* TODO: use meaningful error code */
if (xp_awk_setglobal (
run, XP_AWK_GLOBAL_ERRNO,
xp_awk_val_one) == -1) return -1;
run->errnum = XP_AWK_EIOHANDLER;
return -1;
}
ok = xp_true;
}
p = p->next;
}
if (ok) return 0;
/* there is no corresponding extio for name */
/* TODO: use meaningful error code. but is this needed? */
if (xp_awk_setglobal (
run, XP_AWK_GLOBAL_ERRNO, xp_awk_val_one) == -1) return -1;
run->errnum = XP_AWK_ENOSUCHIO;
return -1;
}
int xp_awk_nextextio_read (
xp_awk_run_t* run, int in_type, const xp_char_t* name)
{
xp_awk_extio_t* p = run->extio.chain;
xp_awk_io_t handler;
int extio_type, extio_mode, extio_mask, n;
xp_assert (in_type >= 0 && in_type <= xp_countof(__in_type_map));
xp_assert (in_type >= 0 && in_type <= xp_countof(__in_mode_map));
xp_assert (in_type >= 0 && in_type <= xp_countof(__in_mask_map));
/* translate the in_type into the relevant extio type and mode */
extio_type = __in_type_map[in_type];
extio_mode = __in_mode_map[in_type];
extio_mask = __in_mask_map[in_type];
handler = run->extio.handler[extio_type];
if (handler == XP_NULL)
{
/* no io handler provided */
run->errnum = XP_AWK_EIOIMPL; /* TODO: change the error code */
return -1;
}
while (p != XP_NULL)
{
if (p->type == (extio_type | extio_mask) &&
xp_strcmp(p->name,name) == 0) break;
p = p->next;
}
if (p == XP_NULL)
{
/* something is totally wrong */
run->errnum = XP_AWK_EINTERNAL;
return -1;
}
n = handler (XP_AWK_IO_NEXT, p, XP_NULL, 0);
if (n == -1)
{
/* TODO: is this errnum correct? */
run->errnum = XP_AWK_EIOHANDLER;
return -1;
}
return n;
}
int xp_awk_closeextio_read (
xp_awk_run_t* run, int in_type, const xp_char_t* name)
{
xp_awk_extio_t* p = run->extio.chain, * px = XP_NULL;
xp_awk_io_t handler;
int extio_type, extio_mode, extio_mask;
xp_assert (in_type >= 0 && in_type <= xp_countof(__in_type_map));
xp_assert (in_type >= 0 && in_type <= xp_countof(__in_mode_map));
xp_assert (in_type >= 0 && in_type <= xp_countof(__in_mask_map));
/* translate the in_type into the relevant extio type and mode */
extio_type = __in_type_map[in_type];
extio_mode = __in_mode_map[in_type];
extio_mask = __in_mask_map[in_type];
handler = run->extio.handler[extio_type];
if (handler == XP_NULL)
{
/* no io handler provided */
run->errnum = XP_AWK_EIOIMPL; /* TODO: change the error code */
return -1;
}
while (p != XP_NULL)
{
if (p->type == (extio_type | extio_mask) &&
xp_strcmp (p->name, name) == 0)
{
xp_awk_io_t handler;
handler = run->extio.handler[p->type & __MASK_CLEAR];
if (handler != XP_NULL)
{
if (handler (XP_AWK_IO_CLOSE, p, XP_NULL, 0) == -1)
{
/* this is not a run-time error.*/
/* TODO: set ERRNO */
run->errnum = XP_AWK_EIOHANDLER;
return -1;
}
}
if (px != XP_NULL) px->next = p->next;
else run->extio.chain = p->next;
xp_free (p->name);
xp_free (p);
return 0;
}
px = p;
p = p->next;
}
/* this is not a run-time error */
run->errnum = XP_AWK_EIOHANDLER;
return -1;
}
int xp_awk_closeextio_write (
xp_awk_run_t* run, int out_type, const xp_char_t* name)
{
xp_awk_extio_t* p = run->extio.chain, * px = XP_NULL;
xp_awk_io_t handler;
int extio_type, extio_mode, extio_mask;
xp_assert (out_type >= 0 && out_type <= xp_countof(__out_type_map));
xp_assert (out_type >= 0 && out_type <= xp_countof(__out_mode_map));
xp_assert (out_type >= 0 && out_type <= xp_countof(__out_mask_map));
/* translate the out_type into the relevant extio type and mode */
extio_type = __out_type_map[out_type];
extio_mode = __out_mode_map[out_type];
extio_mask = __out_mask_map[out_type];
handler = run->extio.handler[extio_type];
if (handler == XP_NULL)
{
/* no io handler provided */
run->errnum = XP_AWK_EIOIMPL; /* TODO: change the error code */
return -1;
}
while (p != XP_NULL)
{
if (p->type == (extio_type | extio_mask) &&
xp_strcmp (p->name, name) == 0)
{
xp_awk_io_t handler;
handler = run->extio.handler[p->type & __MASK_CLEAR];
if (handler != XP_NULL)
{
if (handler (XP_AWK_IO_CLOSE, p, XP_NULL, 0) == -1)
{
/* this is not a run-time error.*/
/* TODO: set ERRNO */
run->errnum = XP_AWK_EIOHANDLER;
return -1;
}
}
if (px != XP_NULL) px->next = p->next;
else run->extio.chain = p->next;
xp_free (p->name);
xp_free (p);
return 0;
}
px = p;
p = p->next;
}
/* this is not a run-time error */
/* TODO: set ERRNO */
run->errnum = XP_AWK_EIOHANDLER;
return -1;
}
int xp_awk_closeextio (xp_awk_run_t* run, const xp_char_t* name)
{
xp_awk_extio_t* p = run->extio.chain, * px = XP_NULL;
while (p != XP_NULL)
{
/* it handles the first that matches the given name
* regardless of the extio type */
if (xp_strcmp (p->name, name) == 0)
{
xp_awk_io_t handler;
handler = run->extio.handler[p->type & __MASK_CLEAR];
if (handler != XP_NULL)
{
if (handler (XP_AWK_IO_CLOSE, p, XP_NULL, 0) == -1)
{
/* this is not a run-time error.*/
/* TODO: set ERRNO */
run->errnum = XP_AWK_EIOHANDLER;
return -1;
}
}
if (px != XP_NULL) px->next = p->next;
else run->extio.chain = p->next;
xp_free (p->name);
xp_free (p);
return 0;
}
px = p;
p = p->next;
}
/* this is not a run-time error */
/* TODO: set ERRNO */
run->errnum = XP_AWK_EIOHANDLER;
return -1;
}
void xp_awk_clearextio (xp_awk_run_t* run)
{
xp_awk_extio_t* next;
xp_awk_io_t handler;
int n;
while (run->extio.chain != XP_NULL)
{
handler = run->extio.handler[run->extio.chain->type & __MASK_CLEAR];
next = run->extio.chain->next;
if (handler != XP_NULL)
{
n = handler (XP_AWK_IO_CLOSE, run->extio.chain, XP_NULL, 0);
if (n == -1)
{
/* TODO:
* some warning actions need to be taken */
}
}
xp_free (run->extio.chain->name);
xp_free (run->extio.chain);
run->extio.chain = next;
}
}
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