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https://github.com/servalproject/serval-dna.git
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136 lines
4.2 KiB
C
136 lines
4.2 KiB
C
/*
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Serval Project testing framework utility - create fixture file
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Copyright (C) 2012 Serval Project Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/*
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Portions Copyright (C) 2013 Petter Reinholdtsen
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Some rights reserved
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdlib.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include <stdarg.h>
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#include "str.h"
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static const char *argv0 = "test_createfile";
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static void fatal(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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char buf[1024];
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setbuffer(stderr, buf, sizeof buf);
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fprintf(stderr, "%s: ", argv0);
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vfprintf(stderr, fmt, ap);
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fputc('\n', stderr);
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va_end(ap);
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fflush(stderr);
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setbuf(stderr, NULL);
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exit(1);
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}
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static inline char stripe(int i)
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{
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return (i >= ' ' && i <= '~') ? i : '.';
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}
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int main(int argc, char **argv)
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{
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argv0 = argv[0];
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uint64_t size = 0;
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const char *label = "";
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int i;
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for (i = 1; i < argc; ++i) {
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const char *arg = argv[i];
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if (str_startswith(arg, "--size=", &arg)) {
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if (!str_to_uint64_scaled(arg, 10, &size, NULL))
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fatal("illegal --size= argument: %s", arg);
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}
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else if (str_startswith(arg, "--label=", &arg))
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label = arg;
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else
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fatal("unrecognised argument: %s", arg);
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}
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uint64_t offset = 0;
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char buf[127];
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for (i = 0; i != sizeof buf; ++i)
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buf[i] = stripe(i);
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const size_t labellen = strlen(label);
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int bouncemax = sizeof buf - labellen;
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if (bouncemax < 0)
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bouncemax = sizeof buf;
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int bounce = 3;
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int bouncedelta = 1;
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while (!ferror(stdout) && offset < size) {
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int n = sprintf(buf, "%"PRId64, offset);
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buf[n] = stripe(n);
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size_t labelsiz = labellen;
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if (labelsiz && bounce < sizeof buf) {
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if (labelsiz > sizeof buf - bounce)
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labelsiz = sizeof buf - bounce;
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memcpy(buf + bounce, label, labelsiz);
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}
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int remain = size - offset - 1;
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if (remain > sizeof buf)
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remain = sizeof buf;
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fwrite(buf, remain, 1, stdout);
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fputc('\n', stdout);
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offset += remain + 1;
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if (bounce <= n || bounce >= bouncemax)
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bouncedelta *= -1;
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if (labelsiz) {
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if (bouncedelta > 0)
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buf[bounce] = stripe(bounce);
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else
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buf[bounce + labelsiz - 1] = stripe(bounce + labelsiz - 1);
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}
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bounce += bouncedelta;
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}
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fflush(stdout);
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if (ferror(stdout))
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fatal("write error: %s [errno=%d]", strerror(errno), errno);
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exit(0);
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}
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