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include <ctype.h>
# K_CONVERT -- Convert a string with coded escape sequences to the real thing
#
# B.Simon 23-Jan-89 Original
procedure k_convert (escstr, escseq, maxch)
char escstr[ARB] # i: Escape sequence string
char escseq[ARB] # o: Escape key sequence
int maxch # i: Declared length of key sequence
#--
int ic, jc, index, num
string echars "befnrt"
string ecodes "\010\033\f\n\r\t"
int stridx()
begin
ic = 1
for (jc = 1; jc <= maxch; jc = jc + 1) {
# Exit when all characters in escape string have been processed
if (escstr[ic] == EOS)
break
# Convert escape sequence
if (escstr[ic] == '\\') {
ic = ic + 1
index = stridx (escstr[ic], echars)
if (index > 0) {
escseq[jc] = ecodes[index]
} else if (IS_DIGIT(escstr[ic])) {
for (num = 0; IS_DIGIT(escstr[ic]); ic = ic + 1)
num = 8 * num + TO_DIGIT(escstr[ic])
ic = ic - 1
escseq[jc] = num
} else {
escseq[jc] = escstr[ic]
}
# Convert control sequence
} else if (escstr[ic] == '^') {
ic = ic + 1
escseq[jc] = mod (int(escstr[ic]), 32)
# Copy ordinary character
} else {
escseq[jc] = escstr[ic]
}
ic = ic + 1
}
escseq[jc] = EOS
end
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