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/*++
/* NAME
/* mail_print 3
/* SUMMARY
/* intra-mail system write routine
/* SYNOPSIS
/* #include <mail_proto.h>
/*
/* int mail_print(stream, format, ...)
/* VSTREAM *stream;
/* const char *format;
/*
/* int mail_vprint(stream, format, ap)
/* VSTREAM *stream;
/* const char *format;
/* va_list ap;
/*
/* void mail_print_register(letter, name, print_fn)
/* int letter;
/* const char *name;
/* void (*print_fn)(VSTREAM *stream, const char *data);
/* DESCRIPTION
/* mail_print() prints one or more null-delimited strings to
/* the named stream, each string being converted according to the
/* contents of the \fIformat\fR argument.
/*
/* mail_vprint() provides an alternative interface.
/*
/* mail_print_register() registers the named print function for
/* the specified letter, for the named type.
/*
/* Arguments:
/* .IP stream
/* The stream to print to.
/* .IP format
/* Format string, which is interpreted as follows:
/* .RS
/* .IP "white space"
/* White space in the format string is ignored.
/* .IP %s
/* The corresponding argument has type (char *).
/* .IP %d
/* The corresponding argument has type (int).
/* .IP %ld
/* The corresponding argument has type (long).
/* .IP %letter
/* Call the print routine that was registered for the specified letter.
/* .PP
/* Anything else in a format string is a fatal error.
/* .RE
/* .IP letter
/* Format letter that is bound to the \fIprint_fn\fR print function.
/* .IP name
/* Descriptive string for verbose logging.
/* .IP print_fn
/* A print function. It takes as arguments:
/* .RS
/* .IP stream
/* The stream to print to.
/* .IP data
/* A generic data pointer. It is up to the function
/* to do any necessary casts to the data-specific type.
/* .RE
/* LICENSE
/* .ad
/* .fi
/* The Secure Mailer license must be distributed with this software.
/* AUTHOR(S)
/* Wietse Venema
/* IBM T.J. Watson Research
/* P.O. Box 704
/* Yorktown Heights, NY 10598, USA
/*--*/
/* System library. */
#include <sys_defs.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdarg.h>
#include <ctype.h>
/* Utility library. */
#include <msg.h>
#include <mymalloc.h>
#include <vstream.h>
/* Global library. */
#include "mail_proto.h"
/*
* Provision for the user to register type-specific scanners for
* applications with unusual requirements.
*/
typedef struct {
int letter;
char *name;
MAIL_PRINT_FN print_fn;
} MAIL_PRINT;
MAIL_PRINT *mail_print_tab = 0;
int mail_print_tablen = 0;
/* mail_print_register - register printer function */
void mail_print_register(int letter, const char *name, MAIL_PRINT_FN print_fn)
{
MAIL_PRINT *tp;
for (tp = 0; tp < mail_print_tab + mail_print_tablen; tp++)
if (tp->letter == letter)
msg_panic("mail_print_register: redefined letter: %c", letter);
/*
* Tight fit allocation. We're not registering lots of characters.
*/
if (mail_print_tab == 0) {
mail_print_tablen = 1;
mail_print_tab = (MAIL_PRINT *)
mymalloc(sizeof(*mail_print_tab) * mail_print_tablen);
} else {
mail_print_tablen++;
mail_print_tab = (MAIL_PRINT *)
myrealloc((char *) mail_print_tab,
sizeof(*mail_print_tab) * mail_print_tablen);
}
tp = mail_print_tab + mail_print_tablen - 1;
tp->letter = letter;
tp->name = mystrdup(name);
tp->print_fn = print_fn;
}
/* mail_vprint - print null-delimited data to stream */
int mail_vprint(VSTREAM *stream, const char *fmt, va_list ap)
{
const char *cp;
int lflag;
char *sval;
int ival;
long lval;
int error;
MAIL_PRINT *tp;
for (cp = fmt; (error = vstream_ferror(stream)) == 0 && *cp != 0; cp++) {
if (ISSPACE(*cp))
continue;
if (*cp != '%')
msg_fatal("mail_vprint: bad format: %.*s>%c<%s",
cp - fmt, fmt, *cp, cp + 1);
if ((lflag = (*++cp == 'l')) != 0)
cp++;
switch (*cp) {
case 's':
sval = va_arg(ap, char *);
if (msg_verbose)
msg_info("print string: %s", sval);
vstream_fputs(sval, stream);
VSTREAM_PUTC(0, stream);
break;
case 'd':
if (lflag) {
lval = va_arg(ap, long);
if (msg_verbose)
msg_info("print long: %ld", lval);
vstream_fprintf(stream, "%ld", lval);
} else {
ival = va_arg(ap, int);
if (msg_verbose)
msg_info("print int: %d", ival);
vstream_fprintf(stream, "%d", ival);
}
VSTREAM_PUTC(0, stream);
break;
default:
for (tp = mail_print_tab; tp < mail_print_tab + mail_print_tablen; tp++)
if (tp->letter == *cp) {
if (msg_verbose)
msg_info("print %s", tp->name);
tp->print_fn(stream, va_arg(ap, char *));
break;
}
if (tp >= mail_print_tab + mail_print_tablen)
msg_fatal("mail_vprint: bad format: %.*s>%c<%s",
cp - fmt, fmt, *cp, cp + 1);
}
}
return (error);
}
/* mail_print - print null-delimited data to stream */
int mail_print(VSTREAM *stream, const char *fmt,...)
{
int status;
va_list ap;
va_start(ap, fmt);
status = mail_vprint(stream, fmt, ap);
va_end(ap);
return (status);
}
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