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//========================================================================
//
// FontEncoding.cc
//
// Copyright 1999 Derek B. Noonburg
//
//========================================================================
#ifdef __GNUC__
#pragma implementation
#endif
#include <stdlib.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include "gmem.h"
#include "FontEncoding.h"
//------------------------------------------------------------------------
// FontEncoding
//------------------------------------------------------------------------
inline int FontEncoding::hash(char *name) {
int h;
h = name[0];
if (name[1])
h = h * 61 + name[1];
return h % fontEncHashSize;
}
FontEncoding::FontEncoding() {
int i;
encoding = (char **)gmalloc(256 * sizeof(char *));
size = 256;
freeEnc = gTrue;
for (i = 0; i < 256; ++i)
encoding[i] = NULL;
for (i = 0; i < fontEncHashSize; ++i)
hashTab[i] = -1;
}
FontEncoding::FontEncoding(char **encoding, int size) {
int i;
this->encoding = encoding;
this->size = size;
freeEnc = gFalse;
for (i = 0; i < fontEncHashSize; ++i)
hashTab[i] = -1;
for (i = 0; i < size; ++i) {
if (encoding[i])
addChar1(i, encoding[i]);
}
}
FontEncoding::FontEncoding(FontEncoding *fontEnc) {
int i;
encoding = (char **)gmalloc(fontEnc->size * sizeof(char *));
size = fontEnc->size;
freeEnc = gTrue;
for (i = 0; i < size; ++i) {
encoding[i] =
fontEnc->encoding[i] ? copyString(fontEnc->encoding[i]) : NULL;
}
memcpy(hashTab, fontEnc->hashTab, fontEncHashSize * sizeof(short));
}
void FontEncoding::addChar(int code, char *name) {
int h, i;
// replace character associated with code
if (encoding[code]) {
h = hash(encoding[code]);
for (i = 0; i < fontEncHashSize; ++i) {
if (hashTab[h] == code) {
hashTab[h] = -2;
break;
}
if (++h == fontEncHashSize)
h = 0;
}
gfree(encoding[code]);
}
// associate name with code
encoding[code] = name;
// insert name in hash table
addChar1(code, name);
}
void FontEncoding::addChar1(int code, char *name) {
int h, i, code2;
// insert name in hash table
h = hash(name);
for (i = 0; i < fontEncHashSize; ++i) {
code2 = hashTab[h];
if (code2 < 0) {
hashTab[h] = code;
break;
} else if (encoding[code2] && !strcmp(encoding[code2], name)) {
// keep the highest code for each char -- this is needed because
// X won't display chars with codes < 32
if (code > code2)
hashTab[h] = code;
break;
}
if (++h == fontEncHashSize)
h = 0;
}
}
FontEncoding::~FontEncoding() {
int i;
if (freeEnc) {
for (i = 0; i < size; ++i) {
if (encoding[i])
gfree(encoding[i]);
}
gfree(encoding);
}
}
int FontEncoding::getCharCode(char *name) {
int h, i, code;
h = hash(name);
for (i = 0; i < fontEncHashSize; ++i) {
code = hashTab[h];
if (code == -1 ||
(code >= 0 && encoding[code] && !strcmp(encoding[code], name)))
return code;
if (++h >= fontEncHashSize)
h = 0;
}
return -1;
}
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