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/*
* keywords.c: keep track of all cross-reference keywords
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "halibut.h"
static int kwcmp(void *av, void *bv)
{
const keyword *a = (const keyword *)av;
const keyword *b = (const keyword *)bv;
return ustrcmp(a->key, b->key);
}
static int kwfind(void *av, void *bv)
{
wchar_t *a = (wchar_t *)av;
const keyword *b = (const keyword *)bv;
return ustrcmp(a, b->key);
}
keyword *kw_lookup(keywordlist *kl, wchar_t *str) {
return find234(kl->keys, str, kwfind);
}
/*
* This function reads through source form and collects the
* keywords. They get collected in a heap, sorted by Unicode
* collation, last at the top (so that we can Heapsort them when we
* finish).
*/
keywordlist *get_keywords(paragraph *source) {
int errors = FALSE;
keywordlist *kl = snew(keywordlist);
numberstate *n = number_init();
int prevpara = para_NotParaType;
number_cfg(n, source);
kl->size = 0;
kl->keys = newtree234(kwcmp);
kl->nlooseends = kl->looseendssize = 0;
kl->looseends = NULL;
for (; source; source = source->next) {
wchar_t *p, *q;
p = q = source->keyword;
/*
* Look for the section type override (`example',
* `question' or whatever - to replace `chapter' or
* `section' on a per-section basis).
*/
if (q) {
q = uadv(q); /* point q at the word beyond */
if (!*q) q = NULL;
}
/*
* Number the chapter / section / list-item / whatever.
* This also sets up the `parent', `child' and `sibling'
* links.
*/
source->kwtext = number_mktext(n, source, q, &prevpara, &errors);
if (p && *p) {
if (source->kwtext || source->type == para_Biblio) {
keyword *kw, *ret;
kw = snew(keyword);
kw->key = p;
kw->text = source->kwtext;
kw->para = source;
ret = add234(kl->keys, kw);
if (ret != kw) {
error(err_multikw, &source->fpos, &ret->para->fpos, p);
sfree(kw);
/* FIXME: what happens to kw->text? Does it leak? */
}
}
} else {
if (kl->nlooseends >= kl->looseendssize) {
kl->looseendssize = kl->nlooseends + 32;
kl->looseends = sresize(kl->looseends, kl->looseendssize,
word *);
}
kl->looseends[kl->nlooseends++] = source->kwtext;
}
}
number_free(n);
if (errors) {
free_keywords(kl);
return NULL;
}
return kl;
}
void free_keywords(keywordlist *kl) {
keyword *kw;
while (kl->nlooseends)
free_word_list(kl->looseends[--kl->nlooseends]);
sfree(kl->looseends);
while ( (kw = index234(kl->keys, 0)) != NULL) {
delpos234(kl->keys, 0);
free_word_list(kw->text);
sfree(kw);
}
freetree234(kl->keys);
sfree(kl);
}
void subst_keywords(paragraph *source, keywordlist *kl) {
for (; source; source = source->next) {
word *ptr;
for (ptr = source->words; ptr; ptr = ptr->next) {
if (ptr->type == word_UpperXref ||
ptr->type == word_LowerXref) {
keyword *kw;
word **endptr, *close, *subst;
kw = kw_lookup(kl, ptr->text);
if (!kw) {
error(err_nosuchkw, &ptr->fpos, ptr->text);
subst = NULL;
} else
subst = dup_word_list(kw->text);
if (subst && ptr->type == word_LowerXref &&
kw->para->type != para_Biblio &&
kw->para->type != para_BiblioCited)
ustrlow(subst->text);
close = snew(word);
close->text = NULL;
close->alt = NULL;
close->type = word_XrefEnd;
close->fpos = ptr->fpos;
close->next = ptr->next;
ptr->next = subst;
for (endptr = &ptr->next; *endptr; endptr = &(*endptr)->next)
(*endptr)->fpos = ptr->fpos;
*endptr = close;
ptr = close;
}
}
}
}
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