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freebsd-dev/lib/libmytinfo/tparm.c
Thomas Gellekum 17a6ff5abf Fix termcap % code processing for some terminals. 
Submitted by:	Ross Ridge <ross@zooid.guild.org> via
		buster@lambda.hh.provi.de (Andreas Burmester)
1999-10-20 08:52:09 +00:00

809 lines
16 KiB
C
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/*
* tparm.c
*
* By Ross Ridge
* Public Domain
* 92/02/01 07:30:36
*
* $FreeBSD$
*/
#include "defs.h"
#include <term.h>
#include <ctype.h>
#ifdef USE_SCCS_IDS
static const char SCCSid[] = "@(#) mytinfo tparm.c 3.2 92/02/01 public domain, By Ross Ridge";
#endif
#ifndef MAX_PUSHED
#define MAX_PUSHED 32
#endif
#define ARG 1
#define NUM 2
#define INTEGER 1
#define STRING 2
typedef struct stack_str {
int type;
int argnum;
int value;
} stack;
static stack S[MAX_PUSHED];
static stack vars['z'-'a'+1];
static int pos = 0;
static struct arg_str {
int type;
int integer;
char *string;
} arg_list[10];
static int argcnt;
static va_list tparm_args;
static int
pusharg(arg)
int arg; {
if (pos == MAX_PUSHED)
return 1;
S[pos].type = ARG;
S[pos++].argnum = arg;
return 0;
}
static int
pushnum(num)
int num; {
if (pos == MAX_PUSHED)
return 1;
S[pos].type = NUM;
S[pos++].value = num;
return 0;
}
/* VARARGS2 */
static int
getarg(argnum, type, p)
int argnum, type;
anyptr p; {
while (argcnt < argnum) {
arg_list[argcnt].type = INTEGER;
arg_list[argcnt++].integer = (int) va_arg(tparm_args, int);
}
if (argcnt > argnum) {
if (arg_list[argnum].type != type)
return 1;
else if (type == STRING)
*(char **)p = arg_list[argnum].string;
else
*(int *)p = arg_list[argnum].integer;
} else {
arg_list[argcnt].type = type;
if (type == STRING)
*(char **)p = arg_list[argcnt++].string
= (char *) va_arg(tparm_args, char *);
else
*(int *)p = arg_list[argcnt++].integer = (int) va_arg(tparm_args, int);
}
return 0;
}
static int
popstring(str)
char **str; {
if (pos-- == 0)
return 1;
if (S[pos].type != ARG)
return 1;
return(getarg(S[pos].argnum, STRING, (anyptr) str));
}
static int
popnum(num)
int *num; {
if (pos-- == 0)
return 1;
switch (S[pos].type) {
case ARG:
return (getarg(S[pos].argnum, INTEGER, (anyptr) num));
case NUM:
*num = S[pos].value;
return 0;
}
return 1;
}
static int
cvtchar(sp, c)
register char *sp, *c; {
switch(*sp) {
case '\\':
switch(*++sp) {
case '\'':
case '$':
case '\\':
case '%':
*c = *sp;
return 2;
case '\0':
*c = '\\';
return 1;
case '0':
if (sp[1] == '0' && sp[2] == '0') {
*c = '\0';
return 4;
}
*c = '\200'; /* '\0' ???? */
return 2;
default:
*c = *sp;
return 2;
}
default:
*c = *sp;
return 1;
}
}
static int termcap;
/* sigh... this has got to be the ugliest code I've ever written.
Trying to handle everything has its cost, I guess.
It actually isn't to hard to figure out if a given % code is supposed
to be interpeted with its termcap or terminfo meaning since almost
all terminfo codes are invalid unless something has been pushed on
the stack and termcap strings will never push things on the stack
(%p isn't used by termcap). So where we have a choice we make the
decision by wether or not somthing has been pushed on the stack.
The static variable termcap keeps track of this; it starts out set
to 1 and is incremented as each argument processed by a termcap % code,
however if something is pushed on the stack it's set to 0 and the
rest of the % codes are interpeted as terminfo % codes. Another way
of putting it is that if termcap equals one we haven't decided either
way yet, if it equals zero we're looking for terminfo codes, and if
its greater than 1 we're looking for termcap codes.
Terminfo % codes:
%% output a '%'
%[[:][-+# ][width][.precision]][doxXs]
output pop according to the printf format
%c output pop as a char
%'c' push character constant c.
%{n} push decimal constant n.
%p[1-9] push paramter [1-9]
%g[a-z] push variable [a-z]
%P[a-z] put pop in variable [a-z]
%l push the length of pop (a string)
%+ add pop to pop and push the result
%- subtract pop from pop and push the result
%* multiply pop and pop and push the result
%& bitwise and pop and pop and push the result
%| bitwise or pop and pop and push the result
%^ bitwise xor pop and pop and push the result
%~ push the bitwise not of pop
%= compare if pop and pop are equal and push the result
%> compare if pop is less than pop and push the result
%< compare if pop is greater than pop and push the result
%A logical and pop and pop and push the result
%O logical or pop and pop and push the result
%! push the logical not of pop
%? condition %t if_true [%e if_false] %;
if condtion evaulates as true then evaluate if_true,
else evaluate if_false. elseif's can be done:
%? cond %t true [%e cond2 %t true2] ... [%e condN %t trueN] [%e false] %;
%i add one to parameters 1 and 2. (ANSI)
Termcap Codes:
%% output a %
%. output parameter as a character
%d output parameter as a decimal number
%2 output parameter in printf format %02d
%3 output parameter in printf format %03d
%+x add the character x to parameter and output it as a character
(UW) %-x subtract parameter FROM the character x and output it as a char
(UW) %ax add the character x to parameter
(GNU) %a[+*-/=][cp]x
GNU arithmetic.
(UW) %sx subtract parameter FROM the character x
%>xy if parameter > character x then add character y to parameter
%B convert to BCD (parameter = (parameter/10)*16 + parameter%16)
%D Delta Data encode (parameter = parameter - 2*(paramter%16))
%i increment the first two parameters by one
%n xor the first two parameters by 0140
(GNU) %m xor the first two parameters by 0177
%r swap the first two parameters
(GNU) %b backup to previous parameter
(GNU) %f skip this parameter
Note the two definitions of %a, the GNU defintion is used if the characters
after the 'a' are valid, otherwise the UW definition is used.
(GNU) used by GNU Emacs termcap libraries
(UW) used by the University of Waterloo (MFCF) termcap libraries
*/
#ifdef lint
/* VARARGS1 */
char *
tparm(str)
char *str; {
#else /* lint */
#ifdef USE_STDARG
#ifdef USE_PROTOTYPES
char *tparm(const char *str, ...) {
#else /* USE_PROTOTYPES */
char *tparm(str)
char *str; {
#endif /* USE_PROTOTYPES */
#else /* USE_STDARG */
char *tparm(va_alist)
va_dcl {
char *str;
#endif
#endif
static char OOPS[] = "OOPS";
static char buf[MAX_LINE];
register char *dp;
register char *fmt;
const char *sp;
char conv_char;
char scan_for;
int scan_depth = 0, if_depth;
static int i, j;
static char *s, c;
char fmt_buf[MAX_LINE];
char sbuf[MAX_LINE];
#ifdef USE_STDARG
va_start(tparm_args, str);
#else
va_start(tparm_args);
str = (char *) va_arg(tparm_args, char *);
#endif
sp = str;
dp = buf;
scan_for = 0;
if_depth = 0;
argcnt = 0;
pos = 0;
termcap = 1;
while(*sp != '\0') {
switch(*sp) {
case '\\':
if (scan_for) {
if (*++sp != '\0')
sp++;
break;
}
*dp++ = *sp++;
if (*sp != '\0')
*dp++ = *sp++;
break;
case '%':
sp++;
if (scan_for) {
if (*sp == scan_for && if_depth == scan_depth) {
if (scan_for == ';')
if_depth--;
scan_for = 0;
} else if (*sp == '?')
if_depth++;
else if (*sp == ';') {
if (if_depth == 0)
return OOPS;
else
if_depth--;
}
sp++;
break;
}
fmt = NULL;
switch(*sp) {
case '%':
*dp++ = *sp++;
break;
case '+':
if (!termcap) {
if (popnum(&j) || popnum(&i))
return OOPS;
i += j;
if (pushnum(i))
return OOPS;
sp++;
break;
}
;/* FALLTHROUGH */
case 'C':
if (*sp == 'C') {
if (getarg(termcap - 1, INTEGER, &i))
return OOPS;
if (i >= 96) {
i /= 96;
if (i == '$')
*dp++ = '\\';
*dp++ = i;
}
}
fmt = "%c";
/* FALLTHROUGH */
case 'a':
if (!termcap)
return OOPS;
if (getarg(termcap - 1, INTEGER, (anyptr) &i))
return OOPS;
if (*++sp == '\0')
return OOPS;
if ((sp[1] == 'p' || sp[1] == 'c')
&& sp[2] != '\0' && fmt == NULL) {
/* GNU arithmetic parameter, what they
really need is terminfo. */
int val, lc;
if (sp[1] == 'p'
&& getarg(termcap - 1 + sp[2] - '@',
INTEGER, (anyptr) &val))
return OOPS;
if (sp[1] == 'c') {
lc = cvtchar(sp + 2, &c) + 2;
/* Mask out 8th bit so \200 can be
used for \0 as per GNU doc's */
val = c & 0177;
} else
lc = 2;
switch(sp[0]) {
case '=':
break;
case '+':
val = i + val;
break;
case '-':
val = i - val;
break;
case '*':
val = i * val;
break;
case '/':
val = i / val;
break;
default:
/* Not really GNU's %a after all... */
lc = cvtchar(sp, &c);
val = c + i;
break;
}
arg_list[termcap - 1].integer = val;
sp += lc;
break;
}
sp += cvtchar(sp, &c);
arg_list[termcap - 1].integer = c + i;
if (fmt == NULL)
break;
sp--;
/* FALLTHROUGH */
case '-':
if (!termcap) {
if (popnum(&j) || popnum(&i))
return OOPS;
i -= j;
if (pushnum(i))
return OOPS;
sp++;
break;
}
fmt = "%c";
/* FALLTHROUGH */
case 's':
if (termcap && (fmt == NULL || *sp == '-')) {
if (getarg(termcap - 1, INTEGER, &i))
return OOPS;
if (*++sp == '\0')
return OOPS;
sp += cvtchar(sp, &c);
arg_list[termcap - 1].integer = c - i;
if (fmt == NULL)
break;
sp--;
}
if (!termcap)
return OOPS;
;/* FALLTHROUGH */
case '.':
if (termcap && fmt == NULL)
fmt = "%c";
;/* FALLTHROUGH */
case 'd':
if (termcap && fmt == NULL)
fmt = "%d";
;/* FALLTHROUGH */
case '2':
if (termcap && fmt == NULL)
fmt = "%02d";
;/* FALLTHROUGH */
case '3':
if (termcap && fmt == NULL)
fmt = "%03d";
;/* FALLTHROUGH */
case ':': case ' ': case '#': case 'u':
case 'x': case 'X': case 'o': case 'c':
case '0': case '1': case '4': case '5':
case '6': case '7': case '8': case '9':
if (fmt == NULL) {
if (termcap)
return OOPS;
if (*sp == ':')
sp++;
fmt = fmt_buf;
*fmt++ = '%';
while(*sp != 's' && *sp != 'x' && *sp != 'X' && *sp != 'd' && *sp != 'o' && *sp != 'c' && *sp != 'u') {
if (*sp == '\0')
return OOPS;
*fmt++ = *sp++;
}
*fmt++ = *sp;
*fmt = '\0';
fmt = fmt_buf;
}
conv_char = fmt[strlen(fmt) - 1];
if (conv_char == 's') {
if (popstring(&s))
return OOPS;
sprintf(sbuf, fmt, s);
} else {
if (termcap) {
if (getarg(termcap++ - 1,
INTEGER, &i))
return OOPS;
} else
if (popnum(&i))
return OOPS;
if (i == 0 && conv_char == 'c')
strcpy(sbuf, "\000");
else
sprintf(sbuf, fmt, i);
}
sp++;
fmt = sbuf;
while(*fmt != '\0') {
if (*fmt == '$' || *fmt == '^' || *fmt == '\\')
*dp++ = '\\';
*dp++ = *fmt++;
}
break;
case 'r':
if (!termcap || getarg(1, INTEGER, &i))
return OOPS;
arg_list[1].integer = arg_list[0].integer;
arg_list[0].integer = i;
sp++;
break;
case 'i':
if (getarg(1, INTEGER, &i)
|| arg_list[0].type != INTEGER)
return OOPS;
arg_list[1].integer++;
arg_list[0].integer++;
sp++;
break;
case 'n':
if (!termcap || getarg(1, INTEGER, &i))
return OOPS;
arg_list[0].integer ^= 0140;
arg_list[1].integer ^= 0140;
sp++;
break;
case '>':
if (!termcap) {
if (popnum(&j) || popnum(&i))
return OOPS;
i = (i > j);
if (pushnum(i))
return OOPS;
sp++;
break;
}
if (getarg(termcap-1, INTEGER, &i))
return OOPS;
sp += cvtchar(sp, &c);
if (i > c) {
sp += cvtchar(sp, &c);
arg_list[termcap-1].integer += c;
} else
sp += cvtchar(sp, &c);
sp++;
break;
case 'B':
if (!termcap || getarg(termcap-1, INTEGER, &i))
return OOPS;
arg_list[termcap-1].integer = 16*(i/10)+i%10;
sp++;
break;
case 'D':
if (!termcap || getarg(termcap-1, INTEGER, &i))
return OOPS;
arg_list[termcap-1].integer = i - 2 * (i % 16);
sp++;
break;
case 'p':
if (termcap > 1)
return OOPS;
if (*++sp == '\0')
return OOPS;
if (*sp == '0')
i = 9;
else
i = *sp - '1';
if (i < 0 || i > 9)
return OOPS;
if (pusharg(i))
return OOPS;
termcap = 0;
sp++;
break;
case 'P':
if (termcap || *++sp == '\0')
return OOPS;
i = *sp++ - 'a';
if (i < 0 || i > 25)
return OOPS;
if (pos-- == 0)
return OOPS;
switch(vars[i].type = S[pos].type) {
case ARG:
vars[i].argnum = S[pos].argnum;
break;
case NUM:
vars[i].value = S[pos].value;
break;
}
break;
case 'g':
if (termcap || *++sp == '\0')
return OOPS;
i = *sp++ - 'a';
if (i < 0 || i > 25)
return OOPS;
switch(vars[i].type) {
case ARG:
if (pusharg(vars[i].argnum))
return OOPS;
break;
case NUM:
if (pushnum(vars[i].value))
return OOPS;
break;
}
break;
case '\'':
if (termcap > 1)
return OOPS;
if (*++sp == '\0')
return OOPS;
sp += cvtchar(sp, &c);
if (pushnum(c) || *sp++ != '\'')
return OOPS;
termcap = 0;
break;
case '{':
if (termcap > 1)
return OOPS;
i = 0;
sp++;
while(isdigit(*sp))
i = 10 * i + *sp++ - '0';
if (*sp++ != '}' || pushnum(i))
return OOPS;
termcap = 0;
break;
case 'l':
if (termcap || popstring(&s))
return OOPS;
i = strlen(s);
if (pushnum(i))
return OOPS;
sp++;
break;
case '*':
if (termcap || popnum(&j) || popnum(&i))
return OOPS;
i *= j;
if (pushnum(i))
return OOPS;
sp++;
break;
case '/':
if (termcap || popnum(&j) || popnum(&i))
return OOPS;
i /= j;
if (pushnum(i))
return OOPS;
sp++;
break;
case 'm':
if (termcap) {
if (getarg(1, INTEGER, &i))
return OOPS;
arg_list[0].integer ^= 0177;
arg_list[1].integer ^= 0177;
sp++;
break;
}
if (popnum(&j) || popnum(&i))
return OOPS;
i %= j;
if (pushnum(i))
return OOPS;
sp++;
break;
case '&':
if (popnum(&j) || popnum(&i))
return OOPS;
i &= j;
if (pushnum(i))
return OOPS;
sp++;
break;
case '|':
if (popnum(&j) || popnum(&i))
return OOPS;
i |= j;
if (pushnum(i))
return OOPS;
sp++;
break;
case '^':
if (popnum(&j) || popnum(&i))
return OOPS;
i ^= j;
if (pushnum(i))
return OOPS;
sp++;
break;
case '=':
if (popnum(&j) || popnum(&i))
return OOPS;
i = (i == j);
if (pushnum(i))
return OOPS;
sp++;
break;
case '<':
if (popnum(&j) || popnum(&i))
return OOPS;
i = (i < j);
if (pushnum(i))
return OOPS;
sp++;
break;
case 'A':
if (popnum(&j) || popnum(&i))
return OOPS;
i = (i && j);
if (pushnum(i))
return OOPS;
sp++;
break;
case 'O':
if (popnum(&j) || popnum(&i))
return OOPS;
i = (i || j);
if (pushnum(i))
return OOPS;
sp++;
break;
case '!':
if (popnum(&i))
return OOPS;
i = !i;
if (pushnum(i))
return OOPS;
sp++;
break;
case '~':
if (popnum(&i))
return OOPS;
i = ~i;
if (pushnum(i))
return OOPS;
sp++;
break;
case '?':
if (termcap > 1)
return OOPS;
termcap = 0;
if_depth++;
sp++;
break;
case 't':
if (popnum(&i) || if_depth == 0)
return OOPS;
if (!i) {
scan_for = 'e';
scan_depth = if_depth;
}
sp++;
break;
case 'e':
if (if_depth == 0)
return OOPS;
scan_for = ';';
scan_depth = if_depth;
sp++;
break;
case ';':
if (if_depth-- == 0)
return OOPS;
sp++;
break;
case 'b':
if (--termcap < 1)
return OOPS;
sp++;
break;
case 'f':
if (!termcap++)
return OOPS;
sp++;
break;
}
break;
default:
if (scan_for)
sp++;
else
*dp++ = *sp++;
break;
}
}
va_end(tparm_args);
*dp = '\0';
return buf;
}
#ifdef TEST
void
putch(c)
char c; {
if (c < 0) {
printf("\\%03o", c);
} else if (c < 32) {
printf("^%c", c + '@');
} else if (c == 127) {
printf("^?");
} else {
putchar(c);
}
}
char line[MAX_LINE];
int
main(argc, argv)
int argc;
char **argv; {
register char *sp;
putchar('\n');
while(fgets(line, sizeof(line), stdin) != NULL) {
line[strlen(line)-1] = '\0';
sp = tparm(line, 1, -2, 30, 0, "bob was here");
while(*sp)
putch(*sp++);
putchar('\n');
}
return 0;
}
#endif
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