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/*** ltrcc.c -- leapseconds materialiser
*
* Copyright (C) 2012-2014 Sebastian Freundt
*
* Author: Sebastian Freundt <freundt@ga-group.nl>
*
* This file is part of dateutils.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the author nor the names of any contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
***/
#if defined HAVE_CONFIG_H
# include "config.h"
#endif /* HAVE_CONFIG_H */
#include <unistd.h>
#include <stdlib.h>
#include <stdint.h>
#if defined HAVE_SYS_STDINT_H
# include <sys/stdint.h>
#endif /* HAVE_SYS_STDINT_H */
#include <stdio.h>
#include <stdarg.h>
#include "leaps.h"
#include "date-core.h"
#include "dt-core.h"
#include "nifty.h"
#include "version.c"
#define PROLOGUE (-1UL)
#define EPILOGUE (0UL)
static int
pr_line_corr(const char *line, size_t llen, va_list UNUSED(vap))
{
static int32_t corr = 0;
char *ep;
if (llen == PROLOGUE) {
/* prologue */
corr = 0;
fprintf(stdout, "\
const int32_t %s[] = {\n\
0,\n", line);
return 0;
} else if (llen == EPILOGUE) {
fprintf(stdout, "\
%i\n\
};\n", corr);
return 0;
} else if (line == NULL) {
/* grrrr */
return -1;
} else if (line[0] == '#') {
/* comment line */
return 0;
} else if (line[0] == '\n') {
/* empty line */
return 0;
}
/* otherwise process */
if ((dt_strpd(line, "Leap\t%Y\t%b\t%d\t", &ep), ep) == NULL) {
return -1;
} else if (llen - (ep - line) < 9) {
return -1;
} else if (ep[8] != '\t') {
return -1;
}
switch (ep[9]) {
case '+':
++corr;
break;
case '-':
--corr;
break;
default:
/* still buggered */
return -1;
}
/* output the correction then */
fprintf(stdout, "\t%i,\n", corr);
return 0;
}
static int
pr_line_d(const char *line, size_t llen, va_list vap)
{
static int32_t corr = 0;
struct dt_d_s d;
dt_dtyp_t typ;
int colp;
char *ep;
/* extract type from inner list */
typ = va_arg(vap, dt_dtyp_t);
colp = va_arg(vap, int);
if (llen == PROLOGUE) {
/* prologue */
corr = 0;
if (!colp) {
fprintf(stdout, "\
const struct zleap_s %s[] = {\n\
{0x00U/* 0 */, 0},\n", line);
} else {
fprintf(stdout, "\
const uint32_t %s[] = {\n\
0x00U/* 0 */,\n", line);
}
return 0;
} else if (llen == EPILOGUE) {
/* epilogue */
if (!colp) {
fprintf(stdout, "\
{UINT32_MAX, %i}\n\
};\n", corr);
} else {
fputs("\
UINT32_MAX\n\
};\n", stdout);
}
return 0;
} else if (line == NULL) {
/* something's fucked */
return -1;
} else if (line[0] == '#') {
/* comment line */
return 0;
} else if (line[0] == '\n') {
/* empty line */
return 0;
}
/* otherwise process */
if ((d = dt_strpd(line, "Leap\t%Y\t%b\t%d\t", &ep), ep) == NULL) {
return -1;
} else if (llen - (ep - line) < 9) {
return -1;
} else if (ep[8] != '\t') {
return -1;
}
/* convert to target type */
d = dt_dconv(typ, d);
if (!colp) {
switch (ep[9]) {
case '+':
++corr;
break;
case '-':
--corr;
break;
default:
/* still buggered */
return -1;
}
/* just output the line then */
fprintf(stdout, "\t{0x%xU/* %i */, %i},\n",
d.u, (int32_t)d.u, corr);
} else {
fprintf(stdout, "\t0x%xU/* %i */,\n", d.u, (int32_t)d.u);
}
return 0;
}
static int
pr_line_dt(const char *line, size_t llen, va_list vap)
{
static int32_t corr = 0;
struct dt_dt_s d;
dt_dtyp_t __attribute__((unused)) typ;
int colp;
char *ep;
dt_ssexy_t val;
/* extract type from inner list */
typ = va_arg(vap, dt_dtyp_t);
colp = va_arg(vap, int);
if (llen == PROLOGUE) {
/* prologue */
corr = 0;
if (!colp) {
fprintf(stdout, "\
const struct zleap_s %s[] = {\n\
{INT32_MIN, 0},\n", line);
} else {
fprintf(stdout, "\
const int32_t %s[] = {\n\
INT32_MIN,\n", line);
}
return 0;
} else if (llen == EPILOGUE) {
/* epilogue */
if (!colp) {
fprintf(stdout, "\
{INT32_MAX, %i}\n\
};\n", corr);
} else {
fputs("\
INT32_MAX\n\
};\n", stdout);
}
return 0;
} else if (line == NULL) {
/* buggre */
return -1;
} else if (line[0] == '#') {
/* comment line */
return 0;
} else if (line[0] == '\n') {
/* empty line */
return 0;
}
/* otherwise process */
if ((d = dt_strpdt(
line, "Leap\t%Y\t%b\t%d\t%H:%M:%S", &ep), ep) == NULL) {
return -1;
} else if (llen - (ep - line) < 1) {
return -1;
} else if (ep[0] != '\t') {
return -1;
}
/* fix up and convert to target type */
d.t.hms.s--;
val = dt_to_unix_epoch(d);
if (!colp) {
switch (ep[1]) {
case '+':
++corr;
break;
case '-':
--corr;
break;
default:
/* still buggered */
return -1;
}
/* just output the line then */
fprintf(stdout, "\t{0x%xU/* %li */, %i},\n",
(uint32_t)val, val, corr);
} else {
/* column-oriented mode */
fprintf(stdout, "\t0x%xU/* %li */,\n", (uint32_t)val, val);
}
return 0;
}
static int
pr_line_t(const char *line, size_t llen, va_list vap)
{
struct dt_dt_s d;
dt_dtyp_t typ;
int colp;
char *ep;
uint32_t val;
/* extract type from inner list */
typ = va_arg(vap, dt_dtyp_t);
colp = va_arg(vap, int);
if (llen == PROLOGUE) {
/* prologue */
fprintf(stdout, "\
const uint32_t %s[] = {\n\
UINT32_MAX,\n", line);
return 0;
} else if (llen == EPILOGUE) {
/* epilogue */
fputs("\
UINT32_MAX\n\
};\n", stdout);
return 0;
} else if (typ != (dt_dtyp_t)DT_HMS || !colp) {
return 0;
} else if (line == NULL) {
/* do fuckall */
return -1;
} else if (line[0] == '#') {
/* comment line */
return 0;
} else if (line[0] == '\n') {
/* empty line */
return 0;
}
/* otherwise process */
if ((d = dt_strpdt(
line, "Leap\t%Y\t%b\t%d\t%H:%M:%S", &ep), ep) == NULL) {
return -1;
} else if (llen - (ep - line) < 1) {
return -1;
} else if (ep[0] != '\t') {
return -1;
}
/* fix up and convert to target type */
val = d.t.hms.u24;
/* column-oriented mode */
fprintf(stdout, "\t0x%xU/* %u */,\n", val, val);
return 0;
}
static int
pr_file(FILE *fp, const char *var, int(*cb)(const char*, size_t, va_list), ...)
{
va_list vap;
char *line = NULL;
size_t len = 0;
ssize_t nrd;
/* prologue */
va_start(vap, cb);
cb(var, PROLOGUE, vap);
va_end(vap);
/* main loop */
while ((nrd = getline(&line, &len, fp)) >= 0) {
va_start(vap, cb);
if (cb(line, nrd, vap) < 0) {
fprintf(stderr, "line buggered: %s", line);
}
va_end(vap);
}
/* epilogue */
va_start(vap, cb);
cb(var, EPILOGUE, vap);
va_end(vap);
/* standard epilogue */
fprintf(stdout, "\
const size_t n%s = countof(%s);\n\n", var, var);
if (line != NULL) {
free(line);
}
return 0;
}
static int col = 0;
static int
parse_file(const char *file)
{
FILE *fp;
if ((fp = fopen(file, "r")) == NULL) {
return -1;
}
fprintf(stdout, "\
/*** autogenerated by: ltrcc %s */\n\
\n\
#include <stdint.h>\n\
#include <limits.h>\n\
#include \"leaps.h\"\n\
#include \"leapseconds.h\"\n\
\n\
#if !defined INCLUDED_ltrcc_generated_def_\n\
#define INCLUDED_ltrcc_generated_def_\n\
\n\
#if !defined countof\n\
# define countof(x) (sizeof(x) / sizeof(*x))\n\
#endif /* !countof */\n\
\n", file);
if (col) {
pr_file(fp, "leaps_corr", pr_line_corr);
rewind(fp);
}
pr_file(fp, "leaps_ymd", pr_line_d, DT_YMD, col);
rewind(fp);
pr_file(fp, "leaps_ymcw", pr_line_d, DT_YMCW, col);
rewind(fp);
pr_file(fp, "leaps_d", pr_line_d, DT_DAISY, col);
rewind(fp);
pr_file(fp, "leaps_s", pr_line_dt, DT_YMD, col);
rewind(fp);
pr_file(fp, "leaps_hms", pr_line_t, DT_HMS, col);
fputs("\
/* exported number of leap transitions */\n\
const size_t nleaps = countof(leaps_corr);\n\
\n\
#endif /* INCLUDED_ltrcc_generated_def_ */\n", stdout);
return 0;
}
#include "ltrcc.yucc"
int
main(int argc, char *argv[])
{
yuck_t argi[1U];
int rc = 0;
if (yuck_parse(argi, argc, argv) < 0) {
rc = 1;
goto out;
} else if (!argi->nargs) {
fputs("LEAPS_FILE argument is mandatory\n", stderr);
rc = 1;
goto out;
}
/* assign params */
col = argi->column_oriented_flag;
if (parse_file(argi->args[0U]) < 0) {
perror("Cannot parse file");
rc = 1;
}
out:
yuck_free(argi);
return rc;
}
/* ltrcc.c ends here */
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