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macros.c
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macros.c
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/**************************************************************************
* This program is Copyright (C) 1986-2002 by Jonathan Payne. JOVE is *
* provided by Jonathan and Jovehacks without charge and without *
* warranty. You may copy, modify, and/or distribute JOVE, provided that *
* this notice is included in all the source files and documentation. *
**************************************************************************/
#include "jove.h"
#include "jctype.h"
#include "fp.h"
#include "chars.h"
#include "disp.h"
#include "ask.h"
#include "commands.h"
#include "macros.h"
#include "extend.h"
#include "fmt.h"
/* #include "util.h" */
private void
pop_macro_stack proto((void));
private struct macro
*ask_macname proto((const char *, int));
private bool UnsavedMacros = NO; /* are there any macros that need saving to a file? */
struct macro *macros = NULL; /* macros */
bool InMacDefine = NO;
private void
add_mac(struct macro *new)
{
struct macro
*mp,
*prev = NULL;
for (mp = macros; mp != NULL; prev = mp, mp = mp->m_nextm) {
if (mp == new) {
return;
}
}
if (prev) {
prev->m_nextm = new;
} else {
macros = new;
}
new->m_nextm = NULL;
new->Type = MACRO;
}
/* To execute a macro, we have a "stack" of running macros. Whenever
* we execute a macro, we push it on the stack, run it, then pop it
* from the stack.
*/
struct m_thread {
struct m_thread *mt_prev;
struct macro *mt_mp;
int mt_offset,
mt_count;
};
private struct m_thread *mac_stack = NULL;
private struct m_thread *
alloc_mthread(void)
{
return (struct m_thread *) emalloc(sizeof(struct m_thread));
}
private void
free_mthread(struct m_thread *t)
{
free((UnivPtr) t);
}
void
unwind_macro_stack(void)
{
while (mac_stack != NULL) {
pop_macro_stack();
}
}
private void
pop_macro_stack(void)
{
struct m_thread *m;
if ((m = mac_stack) == NULL) {
return;
}
mac_stack = m->mt_prev;
free_mthread(m);
}
private void
push_macro_stack(struct macro *m, int count)
{
struct m_thread *t;
for (t = mac_stack; t != NULL; t = t->mt_prev) {
if (t->mt_mp == m) {
complain("[Cannot execute macro recusively]");
/* NOTREACHED */
}
}
if (count <= 0) {
complain("[Cannot execute macro a negative number of times]");
/* NOTREACHED */
}
t = alloc_mthread();
t->mt_prev = mac_stack;
mac_stack = t;
t->mt_offset = 0;
t->mt_mp = m;
t->mt_count = count;
}
void
do_macro(struct macro *mac)
{
push_macro_stack(mac, arg_value_as_int());
}
private struct macro KeyMacro = { /* Macro used for defining */
MACRO, "keyboard-macro", 0, NULL, NULL
};
private int kmac_len;
private int kmac_buflen = 0;
void
mac_init(void)
{
add_mac(&KeyMacro);
}
void
mac_putc(DAPchar c)
{
if (kmac_len >= kmac_buflen) {
KeyMacro.m_body = erealloc((UnivPtr) KeyMacro.m_body, (size_t) kmac_buflen + 16);
kmac_buflen += 16;
}
KeyMacro.m_body[kmac_len++] = (char)c;
}
void
note_dispatch(void)
{
if (kmac_len > 0) {
KeyMacro.m_len = kmac_len - 1;
}
}
bool
in_macro(void)
{
return (mac_stack != NULL);
}
ZXchar
mac_getc(void)
{
struct m_thread *mthread;
struct macro *m;
if ((mthread = mac_stack) == NULL) {
return EOF;
}
m = mthread->mt_mp;
if (mthread->mt_offset == m->m_len) {
mthread->mt_offset = 0;
if (--mthread->mt_count == 0) {
pop_macro_stack();
}
return mac_getc();
}
return ZXC(m->m_body[mthread->mt_offset++]);
}
private void
MacDef(
struct macro *m, /* NULL, or def to overwrite */
const char *name, /* must be stable if m isn't NULL */
int len,
char *body
)
{
if (m == NULL) {
m = (struct macro *) emalloc(sizeof * m);
m->Name = name;
} else {
if (m->m_body != NULL) {
free((UnivPtr) m->m_body);
}
}
m->m_len = len;
if (len == 0) {
m->m_body = NULL;
} else {
m->m_body = emalloc((size_t) len);
byte_copy(body, m->m_body, (size_t) len);
}
add_mac(m);
if (!InJoverc) {
UnsavedMacros = YES;
}
}
void
NameMac(void)
{
char *name = NULL;
struct macro *m;
if (KeyMacro.m_len == 0) {
complain("[No keyboard macro to name!]");
/* NOTREACHED */
}
if (in_macro() || InMacDefine) {
complain("[Can't name while defining/executing]");
/* NOTREACHED */
}
if ((m = ask_macname(ProcFmt, ALLOW_OLD | ALLOW_INDEX | ALLOW_NEW)) == NULL) {
name = copystr(Minibuf);
}
if (m == &KeyMacro) {
complain("[Can't name it that!]");
/* NOTREACHED */
}
MacDef(m, name, KeyMacro.m_len, KeyMacro.m_body);
}
void
RunMacro(void)
{
do_macro((struct macro *) findmac(ProcFmt));
}
private void
pr_putc(ZXchar c, File *fp)
{
if (c == '\\' || c == '^') {
f_putc('\\', fp);
f_putc((char)c, fp);
} else {
char buf[PPWIDTH];
char *p;
PPchar(c, buf);
for (p = buf; *p != '\0'; p++) {
f_putc(*p, fp);
}
}
}
void
WriteMacs(void)
{
struct macro *m;
char
fnamebuf[FILESIZE];
File *fp;
int i;
(void) ask_file((char *)NULL, (char *)NULL, fnamebuf);
fp = open_file(fnamebuf, iobuff, F_WRITE, YES);
/* Don't write the keyboard macro which is always the first */
for (m = macros->m_nextm; m != NULL; m = m->m_nextm) {
fwritef(fp, "define-macro %s ", m->Name);
for (i = 0; i < m->m_len; i++) {
pr_putc(ZXC(m->m_body[i]), fp);
}
#ifdef USE_CRLF
f_putc('\r', fp);
#endif /* USE_CRLF */
f_putc(EOL, fp);
}
close_file(fp);
UnsavedMacros = NO;
}
void
DefKBDMac(void)
{
struct macro *m = ask_macname(ProcFmt,
ALLOW_OLD | ALLOW_INDEX | ALLOW_NEW);
ZXchar c;
const char
*macro_name = m == NULL ? copystr(Minibuf) : m->Name,
*macro_body;
char
macro_buffer[LBSIZE];
int len;
if (m == &KeyMacro) {
complain("[Can't name it that!]");
/* NOTREACHED */
}
/* ??? I hope that this ask doesn't change *m! */
macro_body = ask(NullStr, ": %f %s enter body: ", macro_name);
len = 0;
while ((c = ZXC(*macro_body++)) != '\0') {
if (c == '\\' || c == '^') {
c = DecodePair(c, ZXC(*macro_body++));
}
if (len >= LBSIZE) {
complain("Macro to large");
/* NOTREACHED */
}
macro_buffer[len++] = (char)c;
}
MacDef(m, macro_name, len, macro_buffer);
}
void
Remember(void)
{
/* We're already executing the macro; ignore any attempts
* to define the keyboard macro while we are executing.
*/
if (in_macro()) {
return;
}
if (InMacDefine) {
message("[Already defining ... continue with definition]");
} else {
UpdModLine = YES;
InMacDefine = YES;
kmac_len = KeyMacro.m_len = 0;
message("Defining...");
}
}
void
Forget(void)
{
UpdModLine = YES;
if (InMacDefine) {
message("Keyboard macro defined.");
InMacDefine = NO;
} else {
complain("[end-kbd-macro: not currently defining macro!]");
/* NOTREACHED */
}
}
void
ExecMacro(void)
{
do_macro(&KeyMacro);
}
void
MacInter(void)
{
if (Asking) {
Interactive = YES;
}
}
bool
ModMacs(void)
{
return UnsavedMacros;
}
/* Ask for macro name, with completion.
* Flags is passed directly to complete. If ALLOW_NEW is on,
* the name might be new, in which case NULL is returned and the
* actual name in in Minibuf.
*/
private struct macro *
ask_macname(const char *prompt, int flags)
{
const char *strings[100];
const char **strs = strings;
struct macro *m;
int com;
for (m = macros; m != NULL; m = m->m_nextm) {
if (strs == &strings[elemsof(strings) - 1]) {
complain("[too many macros]");
/* NOTREACHED */
}
*strs++ = m->Name;
}
*strs = NULL;
if ((com = complete(strings, (char *)NULL, prompt, flags)) < 0) {
return NULL;
}
m = macros;
while (--com >= 0) {
m = m->m_nextm;
}
return m;
}
const data_obj *
findmac(const char *prompt)
{
return (data_obj *)ask_macname(prompt, ALLOW_OLD | ALLOW_INDEX);
}