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/*
* biblio.c: process the bibliography
*/
#include <assert.h>
#include "halibut.h"
static wchar_t *gentext(int num) {
wchar_t text[22];
wchar_t *p = text + lenof(text);
*--p = L'\0';
*--p = L']';
while (num != 0) {
assert(p > text);
*--p = L"0123456789"[num % 10];
num /= 10;
}
assert(p > text);
*--p = L'[';
return ustrdup(p);
}
static void cite_biblio(keywordlist *kl, wchar_t *key, filepos fpos) {
keyword *kw = kw_lookup(kl, key);
if (!kw)
error(err_nosuchkw, &fpos, key);
else {
/*
* We've found a \k reference. If it's a
* bibliography entry ...
*/
if (kw->para->type == para_Biblio) {
/*
* ... then mark the paragraph as cited.
*/
kw->para->type = para_BiblioCited;
}
}
}
/*
* Make a pass through the source form, generating citation formats
* for bibliography entries and also marking which bibliography
* entries are actually cited (or \nocite-ed).
*/
void gen_citations(paragraph *source, keywordlist *kl) {
paragraph *para;
int bibnum = 0;
for (para = source; para; para = para->next) {
word *ptr;
/*
* \BR and \nocite paragraphs get special processing here.
*/
if (para->type == para_BR) {
keyword *kw = kw_lookup(kl, para->keyword);
if (!kw) {
error(err_nosuchkw, ¶->fpos, para->keyword);
} else if (kw->text) {
error(err_multiBR, ¶->fpos, para->keyword);
} else {
kw->text = dup_word_list(para->words);
}
} else if (para->type == para_NoCite) {
wchar_t *wp = para->keyword;
while (*wp) {
cite_biblio(kl, wp, para->fpos);
wp = uadv(wp);
}
}
/*
* Scan for keyword references.
*/
for (ptr = para->words; ptr; ptr = ptr->next) {
if (ptr->type == word_UpperXref ||
ptr->type == word_LowerXref)
cite_biblio(kl, ptr->text, ptr->fpos);
}
}
/*
* We're now almost done; all that remains is to scan through
* the cited bibliography entries and invent default citation
* texts for the ones that don't already have explicitly
* provided \BR text.
*/
for (para = source; para; para = para->next) {
if (para->type == para_BiblioCited) {
keyword *kw = kw_lookup(kl, para->keyword);
assert(kw != NULL);
if (!kw->text) {
word *wd = smalloc(sizeof(word));
wd->text = gentext(++bibnum);
wd->type = word_Normal;
wd->alt = NULL;
wd->next = NULL;
kw->text = wd;
}
para->kwtext = kw->text;
}
}
}
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