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/*
* fref creates troff-formatted references according to specifications
* given on standard in. The specification syntax is similar to that of
* refer, but differs in that all identifiers are two letters instead of
* one (like troff itself). This allows for a larger number of fields.
*/
%x ENTRY
#include <err.h>
#include <stdarg.h>
#define MAX 255
#define AND "och"
#define AVAIL "Tillgänglig: "
#define ED "red."
#define P "s."
#define PP "ss."
#define TR "Övers."
#define VOL "vol."
#define DO_ENTRIES \
DO("ad",ad,e.ad) /* internet address */ \
DO("bo",bo,e.bo) /* book */ \
DO("ci",ci,e.ci) /* city */ \
DO("da",da,e.da) /* date (year) */ \
DO("ed",ed,e.ed) /* editor */ \
DO("jo",jo,e.jo) /* journal */ \
DO("la",la,e.la) /* label */ \
DO("no",no,e.no) /* TODO: issue number */ \
DO("pp",pp,e.pp) /* pages */ \
DO("pu",pu,e.pu) /* publisher */ \
DO("se",se,e.se) /* TODO: series */ \
DO("ti",ti,e.ti) /* title */ \
DO("tr",tr,e.tr) /* translator */ \
DO("vo",vo,e.vo) /* volume */ \
DO("xx",xx,e.xx) /* extra information */ \
/* END */
void field(char *);
void entry(void);
void harvard(void);
int pf(char *, ...);
char *name;
int line; /* line at which entry begins */
int lines = 0; /* total number of lines */
struct entry {
#define DO(s,n,m) char n[MAX];
DO_ENTRIES
#undef DO
int a; /* number of authors */
char au[MAX][MAX]; /* author */
} e;
%%
\n lines++; ECHO;
^%.*\n line = ++lines; field(yytext); BEGIN(ENTRY);
<ENTRY>^%.*\n lines++; field(yytext);
<ENTRY>^[^%] entry(); ECHO; BEGIN(0);
<ENTRY><<EOF>> entry(); yyterminate();
%%
void
main(int argc, char *argv[0])
{
name = strrchr(argv[0], '/');
if(name) name++;
else name = argv[0];
memset(&e, 0, sizeof(e));
yylex();
}
/* Save entry field. */
void
field(char *t)
{
t++;
t[strcspn(t, "\n")] = 0;
/* Fill corresponding field. */
#define AS(a,b) if(strncmp(t, a, 2) == 0 && (t += 3)){ strcpy(b, t); return; }
AS("au",e.au[e.a++]);
#define DO(s,n,m) AS(s,m)
DO_ENTRIES
#undef DO
fprintf(stderr, "%s: unrecognized field %%%.2s at line %d\n",
name, t, lines);
exit(1);
}
/* Print formatted entry. */
void
entry()
{
harvard();
}
/* Print Harvard-formatted entry. */
void
harvard()
{
int i;
/* Print label. */
pf("% = ", e.la);
/* Print authors. */
for(i = 0; i < e.a-2; i++)
printf("%s, ", e.au[i]);
if(i == e.a-2)
printf("%s "AND" ", e.au[i++]);
if(i == e.a-1)
printf("%s", e.au[i]);
/* Print date. */
(pf(" (%).\n", e.da) || (e.a ? pf(".\n") : 0));
/* Print title, book/journal. */
if(*e.bo || *e.jo){
pf("%.\n", e.ti);
pf("\\fI%\\fP", e.bo ? e.bo : e.jo);
pf(" ("ED" %)", e.ed);
}else
pf("\\fI%\\fP", e.ti);
/* Print volume. */
pf(", "VOL" %", e.vo);
/* Print pages, converting hyphens to en dashes. */
if(*e.pp){
printf(", %s ", strpbrk(e.pp, ",-") ? PP : P);
for(i = 0; i < strlen(e.pp); i++){
if(e.pp[i] == '-') putchar('\\');
putchar(e.pp[i]);
}
*e.pp = 0;
}
pf(".\n");
/* Print translator. */
pf(TR" %.\n", e.tr);
/* Print city, publisher. */
(pf("%: %.\n", e.ci, e.pu) || pf("%.\n", e.pu));
/* Print other information. */
pf("%.\n", e.xx);
/* Print internet address. */
pf(AVAIL"%\n", e.ad);
/* Clear entries. */
e.a = 0;
#define DO(s,n,m) \
if(*m) fprintf(stderr, "%s: unused field %%"s" at line %d\n", \
name, line); \
*m = 0;
DO_ENTRIES
#undef DO
}
/* Print formatted text if given fields are non-empty. Clear fields. */
int
pf(char *fmt, ...)
{
char *buf, *p, **fs;
int i, n, sz;
va_list ap;
/* Count given fields. */
for(n = 0, p = fmt; *p; p++)
if(*p == '%')
n++;
/* Allocate memory. */
if(!(fs = malloc(n)))
err(1, "malloc");
/* Verify that no field is empty. */
va_start(ap, fmt);
for(i = 0; i < n; i++){
p = va_arg(ap, char *);
if(!p || !*p)
return 0;
fs[i] = p;
}
va_end(ap);
/* Print fields according to format. */
for(i = 0; *fmt; fmt++)
switch(*fmt){
case '%':
printf("%s", fs[i]);
fs[i++][0] = 0;
break;
default:
putchar(*fmt);
}
return 1;
}
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