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/*
*
* debugger
*
*/
#include "defs.h"
#include "fns.h"
Rune line[LINSIZ];
extern int infile;
Rune *lp;
int peekc,lastc = EOR;
int eof;
/* input routines */
int
eol(int c)
{
return(c==EOR || c==';');
}
int
rdc(void)
{
do {
readchar();
} while (lastc==SPC || lastc==TB);
return(lastc);
}
void
reread(void)
{
peekc = lastc;
}
void
clrinp(void)
{
flush();
lp = 0;
peekc = 0;
}
int
readrune(int fd, Rune *r)
{
char buf[UTFmax];
int i;
for(i=0; i<UTFmax && !fullrune(buf, i); i++)
if(read(fd, buf+i, 1) <= 0)
return -1;
chartorune(r, buf);
return 1;
}
int
readchar(void)
{
Rune *p;
if (eof)
lastc=0;
else if (peekc) {
lastc = peekc;
peekc = 0;
}
else {
if (lp==0) {
for (p = line; p < &line[LINSIZ-1]; p++) {
eof = readrune(infile, p) <= 0;
if (mkfault) {
eof = 0;
error(0);
}
if (eof) {
p--;
break;
}
if (*p == EOR) {
if (p <= line)
break;
if (p[-1] != '\\')
break;
p -= 2;
}
}
p[1] = 0;
lp = line;
}
if ((lastc = *lp) != 0)
lp++;
}
return(lastc);
}
int
nextchar(void)
{
if (eol(rdc())) {
reread();
return(0);
}
return(lastc);
}
int
quotchar(void)
{
if (readchar()=='\\')
return(readchar());
else if (lastc=='\'')
return(0);
else
return(lastc);
}
void
getformat(char *deformat)
{
char *fptr;
BOOL quote;
Rune r;
fptr=deformat;
quote=FALSE;
while ((quote ? readchar()!=EOR : !eol(readchar()))){
r = lastc;
fptr += runetochar(fptr, &r);
if (lastc == '"')
quote = ~quote;
}
lp--;
if (fptr!=deformat)
*fptr = '\0';
}
/*
* check if the input line if of the form:
* <filename>:<digits><verb> ...
*
* we handle this case specially because we have to look ahead
* at the token after the colon to decide if it is a file reference
* or a colon-command with a symbol name prefix.
*/
int
isfileref(void)
{
Rune *cp;
for (cp = lp-1; *cp && !strchr(CMD_VERBS, *cp); cp++)
if (*cp == '\\' && cp[1]) /* escape next char */
cp++;
if (*cp && cp > lp-1) {
while (*cp == ' ' || *cp == '\t')
cp++;
if (*cp++ == ':') {
while (*cp == ' ' || *cp == '\t')
cp++;
if (isdigit(*cp))
return 1;
}
}
return 0;
}
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