352 lines
6.9 KiB
C
352 lines
6.9 KiB
C
|
/*
|
||
|
* string.c - string support functions for cawf(1)
|
||
|
*/
|
||
|
|
||
|
/*
|
||
|
* Copyright (c) 1991 Purdue University Research Foundation,
|
||
|
* West Lafayette, Indiana 47907. All rights reserved.
|
||
|
*
|
||
|
* Written by Victor A. Abell <abe@mace.cc.purdue.edu>, Purdue
|
||
|
* University Computing Center. Not derived from licensed software;
|
||
|
* derived from awf(1) by Henry Spencer of the University of Toronto.
|
||
|
*
|
||
|
* Permission is granted to anyone to use this software for any
|
||
|
* purpose on any computer system, and to alter it and redistribute
|
||
|
* it freely, subject to the following restrictions:
|
||
|
*
|
||
|
* 1. The author is not responsible for any consequences of use of
|
||
|
* this software, even if they arise from flaws in it.
|
||
|
*
|
||
|
* 2. The origin of this software must not be misrepresented, either
|
||
|
* by explicit claim or by omission. Credits must appear in the
|
||
|
* documentation.
|
||
|
*
|
||
|
* 3. Altered versions must be plainly marked as such, and must not
|
||
|
* be misrepresented as being the original software. Credits must
|
||
|
* appear in the documentation.
|
||
|
*
|
||
|
* 4. This notice may not be removed or altered.
|
||
|
*/
|
||
|
|
||
|
#include "cawf.h"
|
||
|
#include <ctype.h>
|
||
|
|
||
|
static void Setroman();
|
||
|
|
||
|
|
||
|
/*
|
||
|
* Asmname(s, c) - assemble name
|
||
|
*/
|
||
|
|
||
|
Asmname(s, c)
|
||
|
unsigned char *s; /* pointer to name */
|
||
|
unsigned char *c; /* code destination (c[3]) */
|
||
|
{
|
||
|
|
||
|
c[1] = c[2] = '\0';
|
||
|
while (*s && *s == ' ')
|
||
|
s++;
|
||
|
if ((c[0] = *s) == '\0')
|
||
|
return(0);
|
||
|
return(((c[1] = s[1]) == '\0') ? 1 : 2);
|
||
|
}
|
||
|
|
||
|
|
||
|
/*
|
||
|
* Delstr(sx) - delete string
|
||
|
*/
|
||
|
|
||
|
void
|
||
|
Delstr(sx)
|
||
|
int sx; /* string index */
|
||
|
{
|
||
|
char buf[MAXLINE]; /* message buffer */
|
||
|
|
||
|
if (sx >= Nstr) {
|
||
|
(void) sprintf(buf, " bad Delstr(%d) index", sx);
|
||
|
Error(FATAL, LINE, buf, NULL);
|
||
|
}
|
||
|
Free(&Str[sx].str);
|
||
|
while (sx < (Nstr - 1)) {
|
||
|
Str[sx] = Str[sx + 1];
|
||
|
sx++;
|
||
|
}
|
||
|
Nstr--;
|
||
|
}
|
||
|
|
||
|
|
||
|
/*
|
||
|
* Endword() - end a word
|
||
|
*/
|
||
|
|
||
|
void
|
||
|
Endword()
|
||
|
{
|
||
|
if (Fontstat != 'R')
|
||
|
Setroman();
|
||
|
Word[Wordx] = '\0';
|
||
|
}
|
||
|
|
||
|
|
||
|
/*
|
||
|
* Findchar(nm, l, s, e) - find special character definition and
|
||
|
* optionally enter it
|
||
|
*/
|
||
|
|
||
|
Findchar(nm, l, s, e)
|
||
|
unsigned char *nm; /* character name */
|
||
|
int l; /* effective length */
|
||
|
unsigned char *s; /* value string */
|
||
|
int e; /* 0 = find, don't enter
|
||
|
* 1 = don't find, enter */
|
||
|
{
|
||
|
int cmp, hi, low, mid;
|
||
|
unsigned char c[3];
|
||
|
|
||
|
c[0] = nm[0];
|
||
|
c[1] = (nm[1] == ' ' || nm[1] == '\t') ? '\0' : nm[1];
|
||
|
c[2] = '\0';
|
||
|
low = mid = 0;
|
||
|
hi = Nsch - 1;
|
||
|
while (low <= hi) {
|
||
|
mid = (low + hi) / 2;
|
||
|
if ((cmp = strncmp((char *)c, (char *)Schar[mid].nm, 2)) < 0)
|
||
|
hi = mid - 1;
|
||
|
else if (cmp > 0)
|
||
|
low = mid + 1;
|
||
|
else {
|
||
|
if ( ! e)
|
||
|
return(mid);
|
||
|
Free(&Schar[mid].str);
|
||
|
goto new_char;
|
||
|
}
|
||
|
}
|
||
|
if ( ! e)
|
||
|
return(-1);
|
||
|
if (Nsch >= MAXSCH)
|
||
|
Error(FATAL, LINE, " at character table limit", NULL);
|
||
|
if (Nsch) {
|
||
|
if (cmp > 0)
|
||
|
mid++;
|
||
|
for (hi = Nsch - 1; hi >= mid; hi--)
|
||
|
Schar[hi+1] = Schar[hi];
|
||
|
}
|
||
|
Nsch++;
|
||
|
Schar[mid].nm[0] = c[0];
|
||
|
Schar[mid].nm[1] = c[1];
|
||
|
|
||
|
new_char:
|
||
|
|
||
|
Schar[mid].str = Newstr(s);
|
||
|
Schar[mid].len = l;
|
||
|
return(mid);
|
||
|
}
|
||
|
|
||
|
|
||
|
/*
|
||
|
* Findhy(s, l, e) - find and optionally enter hyphen
|
||
|
*/
|
||
|
|
||
|
Findhy(s, l, e)
|
||
|
unsigned char *s; /* value string */
|
||
|
int l; /* equivalent length */
|
||
|
int e; /* 0 = find, don't enter
|
||
|
* 1 = enter, don't find */
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
for (i = 0; i < Nhy; i++) {
|
||
|
if (Font[0] == Hychar[i].font)
|
||
|
break;
|
||
|
}
|
||
|
if (i >= Nhy) {
|
||
|
if ( ! e)
|
||
|
return(-1);
|
||
|
if (Nhy >= MAXHYCH)
|
||
|
Error(FATAL, LINE, " at hyphen limit for font ",
|
||
|
(char *)Font);
|
||
|
Hychar[i].font = Font[0];
|
||
|
Nhy++;
|
||
|
} else {
|
||
|
if ( ! e)
|
||
|
return(i);
|
||
|
Error(WARN, LINE, " duplicate hyphen for font ", (char *)Font);
|
||
|
Free(&Hychar[i].str);
|
||
|
}
|
||
|
Hychar[i].str = Newstr(s);
|
||
|
Hychar[i].len = l;
|
||
|
return(i);
|
||
|
}
|
||
|
|
||
|
|
||
|
/*
|
||
|
* Findstr(nm, s, e) - find and optionally enter string in Str[]
|
||
|
*/
|
||
|
|
||
|
unsigned char *
|
||
|
Findstr(nm, s, e)
|
||
|
unsigned char *nm; /* 2 character string name */
|
||
|
unsigned char *s; /* string value */
|
||
|
int e; /* 0 = find, don't enter
|
||
|
* 1 = enter, don't find */
|
||
|
{
|
||
|
unsigned char c[3]; /* character buffer */
|
||
|
int cmp, hi, low, mid; /* binary search controls */
|
||
|
int i; /* temporary indexes */
|
||
|
unsigned char *s1, *s2; /* temporary string pointers */
|
||
|
|
||
|
c[0] = nm[0];
|
||
|
c[1] = (nm[1] == ' ' || nm[1] == '\t') ? '\0' : nm[1];
|
||
|
c[2] = '\0';
|
||
|
low = mid = 0;
|
||
|
hi = Nstr - 1;
|
||
|
Sx = -1;
|
||
|
while (low <= hi) {
|
||
|
mid = (low + hi) / 2;
|
||
|
if ((cmp = strncmp((char *)c, (char *)Str[mid].nm, 2)) < 0)
|
||
|
hi = mid - 1;
|
||
|
else if (cmp > 0)
|
||
|
low = mid + 1;
|
||
|
else {
|
||
|
Sx = mid;
|
||
|
if ( ! e)
|
||
|
return(Str[mid].str);
|
||
|
Free(&Str[mid].str);
|
||
|
goto new_string;
|
||
|
}
|
||
|
}
|
||
|
if ( ! e)
|
||
|
return((unsigned char *)"");
|
||
|
if (Nstr >= MAXSTR)
|
||
|
Error(FATAL, LINE, " out of space for string ", (char *)c);
|
||
|
if (Nstr) {
|
||
|
if (cmp > 0)
|
||
|
mid++;
|
||
|
for (hi = Nstr - 1; hi >= mid; hi--)
|
||
|
Str[hi+1] = Str[hi];
|
||
|
}
|
||
|
Nstr++;
|
||
|
Sx = mid;
|
||
|
Str[mid].nm[0] = c[0];
|
||
|
Str[mid].nm[1] = c[1];
|
||
|
|
||
|
new_string:
|
||
|
|
||
|
if (s == NULL)
|
||
|
return (Str[mid].str = Newstr((unsigned char *)""));
|
||
|
i = (*s == '"') ? 1 : 0;
|
||
|
s1 = Str[mid].str = Newstr(s + i);
|
||
|
if (i) {
|
||
|
s2 = s1 + strlen((char *)s1);
|
||
|
if (s2 > s1 && *(s2-1) == '"')
|
||
|
*(s2-1) = '\0';
|
||
|
}
|
||
|
return(s1);
|
||
|
}
|
||
|
|
||
|
|
||
|
/*
|
||
|
* Setroman() - set Roman font
|
||
|
*/
|
||
|
|
||
|
static void
|
||
|
Setroman()
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
if ((Wordx + Fstr.rl) >= MAXLINE)
|
||
|
Error(WARN, LINE, " word too long", NULL);
|
||
|
else {
|
||
|
if (Fstr.r) {
|
||
|
for (i = 0; i < Fstr.rl; i++) {
|
||
|
Word[Wordx++] = Fstr.r[i];
|
||
|
}
|
||
|
}
|
||
|
Fontstat = 'R';
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
/*
|
||
|
* Str2word(s, len) - copy len characters from string to Word[]
|
||
|
*/
|
||
|
|
||
|
Str2word(s, len)
|
||
|
unsigned char *s;
|
||
|
int len;
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
for (; len > 0; len--, s++) {
|
||
|
switch (Font[0]) {
|
||
|
case 'B':
|
||
|
case 'C':
|
||
|
if (Fontctl == 0) {
|
||
|
if ((Wordx + 5) >= MAXLINE) {
|
||
|
word_too_long:
|
||
|
Error(WARN, LINE, " word too long",
|
||
|
NULL);
|
||
|
return(1);
|
||
|
}
|
||
|
Word[Wordx++] = Trtbl[(int)*s];
|
||
|
Word[Wordx++] = '\b';
|
||
|
Word[Wordx++] = Trtbl[(int)*s];
|
||
|
Word[Wordx++] = '\b';
|
||
|
Word[Wordx++] = Trtbl[(int)*s];
|
||
|
break;
|
||
|
}
|
||
|
if (Fontstat != Font[0]) {
|
||
|
if (Fontstat != 'R')
|
||
|
Setroman();
|
||
|
if ((Wordx + Fstr.bl) >= MAXLINE)
|
||
|
goto word_too_long;
|
||
|
if (Fstr.b) {
|
||
|
for (i = 0; i < Fstr.bl; i++) {
|
||
|
Word[Wordx++] = Fstr.b[i];
|
||
|
}
|
||
|
}
|
||
|
Fontstat = Font[0];
|
||
|
}
|
||
|
if ((Wordx + 1) >= MAXLINE)
|
||
|
goto word_too_long;
|
||
|
Word[Wordx++] = Trtbl[(int)*s];
|
||
|
break;
|
||
|
case 'I':
|
||
|
if (isalnum(*s)) {
|
||
|
if (Fontctl == 0) {
|
||
|
if ((Wordx + 3) >= MAXLINE)
|
||
|
goto word_too_long;
|
||
|
Word[Wordx++] = '_';
|
||
|
Word[Wordx++] = '\b';
|
||
|
Word[Wordx++] = Trtbl[(int)*s];
|
||
|
break;
|
||
|
}
|
||
|
if (Fontstat != 'I') {
|
||
|
if (Fontstat != 'R')
|
||
|
Setroman();
|
||
|
if ((Wordx + Fstr.itl) >= MAXLINE)
|
||
|
goto word_too_long;
|
||
|
if (Fstr.it) {
|
||
|
for (i = 0; i < Fstr.itl; i++) {
|
||
|
Word[Wordx++] = Fstr.it[i];
|
||
|
}
|
||
|
}
|
||
|
Fontstat = 'I';
|
||
|
}
|
||
|
if ((Wordx + 1) >= MAXLINE)
|
||
|
goto word_too_long;
|
||
|
Word[Wordx++] = Trtbl[(int)*s];
|
||
|
break;
|
||
|
}
|
||
|
/* else fall through */
|
||
|
default:
|
||
|
if (Fontstat != 'R')
|
||
|
Setroman();
|
||
|
if ((Wordx + 1) >= MAXLINE)
|
||
|
goto word_too_long;
|
||
|
Word[Wordx++] = Trtbl[(int)*s];
|
||
|
}
|
||
|
}
|
||
|
return(0);
|
||
|
}
|