441 lines
9.5 KiB
C
441 lines
9.5 KiB
C
/*
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* Copyright (c) 2014, Juniper Networks, Inc.
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* All rights reserved.
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* This SOFTWARE is licensed under the LICENSE provided in the
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* ../Copyright file. By downloading, installing, copying, or otherwise
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* using the SOFTWARE, you agree to be bound by the terms of that
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* LICENSE.
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* Phil Shafer, July 2014
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include "xo_config.h"
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#include "xo.h"
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#include <getopt.h> /* Include after xo.h for testing */
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#ifndef UNUSED
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#define UNUSED __attribute__ ((__unused__))
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#endif /* UNUSED */
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static int opt_warn; /* Enable warnings */
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static char **save_argv;
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static char **checkpoint_argv;
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static char *
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next_arg (void)
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{
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char *cp = *save_argv;
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if (cp == NULL)
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xo_errx(1, "missing argument");
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save_argv += 1;
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return cp;
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}
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static void
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prep_arg (char *fmt)
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{
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char *cp, *fp;
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for (cp = fp = fmt; *cp; cp++, fp++) {
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if (*cp != '\\') {
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if (cp != fp)
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*fp = *cp;
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continue;
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}
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switch (*++cp) {
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case 'n':
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*fp = '\n';
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break;
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case 'r':
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*fp = '\r';
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break;
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case 'b':
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*fp = '\b';
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break;
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case 'e':
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*fp = '\e';
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break;
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default:
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*fp = *cp;
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}
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}
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*fp = '\0';
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}
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static void
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checkpoint (xo_handle_t *xop UNUSED, va_list vap UNUSED, int restore)
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{
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if (restore)
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save_argv = checkpoint_argv;
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else
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checkpoint_argv = save_argv;
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}
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/*
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* Our custom formatter is responsible for combining format string pieces
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* with our command line arguments to build strings. This involves faking
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* some printf-style logic.
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*/
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static int
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formatter (xo_handle_t *xop, char *buf, int bufsiz,
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const char *fmt, va_list vap UNUSED)
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{
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int lflag UNUSED = 0; /* Parse long flag, though currently ignored */
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int hflag = 0, jflag = 0, tflag = 0,
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zflag = 0, qflag = 0, star1 = 0, star2 = 0;
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int rc = 0;
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int w1 = 0, w2 = 0;
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const char *cp;
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for (cp = fmt + 1; *cp; cp++) {
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if (*cp == 'l')
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lflag += 1;
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else if (*cp == 'h')
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hflag += 1;
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else if (*cp == 'j')
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jflag += 1;
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else if (*cp == 't')
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tflag += 1;
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else if (*cp == 'z')
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zflag += 1;
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else if (*cp == 'q')
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qflag += 1;
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else if (*cp == '*') {
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if (star1 == 0)
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star1 = 1;
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else
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star2 = 1;
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} else if (strchr("diouxXDOUeEfFgGaAcCsSp", *cp) != NULL)
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break;
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else if (*cp == 'n' || *cp == 'v') {
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if (opt_warn)
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xo_error_h(xop, "unsupported format: '%s'", fmt);
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return -1;
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}
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}
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char fc = *cp;
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/* Handle "%*.*s" */
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if (star1)
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w1 = strtol(next_arg(), NULL, 0);
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if (star2 > 1)
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w2 = strtol(next_arg(), NULL, 0);
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if (fc == 'D' || fc == 'O' || fc == 'U')
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lflag = 1;
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if (strchr("diD", fc) != NULL) {
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long long value = strtoll(next_arg(), NULL, 0);
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if (star1 && star2)
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rc = snprintf(buf, bufsiz, fmt, w1, w2, value);
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else if (star1)
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rc = snprintf(buf, bufsiz, fmt, w1, value);
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else
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rc = snprintf(buf, bufsiz, fmt, value);
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} else if (strchr("ouxXOUp", fc) != NULL) {
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unsigned long long value = strtoull(next_arg(), NULL, 0);
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if (star1 && star2)
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rc = snprintf(buf, bufsiz, fmt, w1, w2, value);
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else if (star1)
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rc = snprintf(buf, bufsiz, fmt, w1, value);
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else
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rc = snprintf(buf, bufsiz, fmt, value);
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} else if (strchr("eEfFgGaA", fc) != NULL) {
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double value = strtold(next_arg(), NULL);
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if (star1 && star2)
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rc = snprintf(buf, bufsiz, fmt, w1, w2, value);
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else if (star1)
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rc = snprintf(buf, bufsiz, fmt, w1, value);
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else
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rc = snprintf(buf, bufsiz, fmt, value);
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} else if (fc == 'C' || fc == 'c' || fc == 'S' || fc == 's') {
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char *value = next_arg();
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if (star1 && star2)
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rc = snprintf(buf, bufsiz, fmt, w1, w2, value);
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else if (star1)
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rc = snprintf(buf, bufsiz, fmt, w1, value);
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else
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rc = snprintf(buf, bufsiz, fmt, value);
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}
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return rc;
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}
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static void
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print_version (void)
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{
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fprintf(stderr, "libxo version %s%s\n",
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xo_version, xo_version_extra);
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fprintf(stderr, "xo version %s%s\n",
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LIBXO_VERSION, LIBXO_VERSION_EXTRA);
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}
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static void
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print_help (void)
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{
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fprintf(stderr,
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"Usage: xo [options] format [fields]\n"
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" --close <path> Close tags for the given path\n"
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" --depth <num> Set the depth for pretty printing\n"
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" --help Display this help text\n"
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" --html OR -H Generate HTML output\n"
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" --json OR -J Generate JSON output\n"
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" --leading-xpath <path> OR -l <path> "
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"Add a prefix to generated XPaths (HTML)\n"
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" --open <path> Open tags for the given path\n"
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" --option <opts> -or -O <opts> Give formatting options\n"
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" --pretty OR -p Make 'pretty' output (add indent, newlines)\n"
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" --style <style> OR -s <style> "
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"Generate given style (xml, json, text, html)\n"
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" --text OR -T Generate text output (the default style)\n"
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" --version Display version information\n"
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" --warn OR -W Display warnings in text on stderr\n"
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" --warn-xml Display warnings in xml on stdout\n"
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" --wrap <path> Wrap output in a set of containers\n"
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" --xml OR -X Generate XML output\n"
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" --xpath Add XPath data to HTML output\n");
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}
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static struct opts {
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int o_depth;
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int o_help;
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int o_not_first;
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int o_xpath;
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int o_version;
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int o_warn_xml;
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int o_wrap;
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} opts;
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static struct option long_opts[] = {
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{ "close", required_argument, NULL, 'c' },
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{ "depth", required_argument, &opts.o_depth, 1 },
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{ "help", no_argument, &opts.o_help, 1 },
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{ "html", no_argument, NULL, 'H' },
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{ "json", no_argument, NULL, 'J' },
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{ "leading-xpath", required_argument, NULL, 'l' },
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{ "not-first", no_argument, &opts.o_not_first, 1 },
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{ "open", required_argument, NULL, 'o' },
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{ "option", required_argument, NULL, 'O' },
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{ "pretty", no_argument, NULL, 'p' },
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{ "style", required_argument, NULL, 's' },
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{ "text", no_argument, NULL, 'T' },
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{ "xml", no_argument, NULL, 'X' },
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{ "xpath", no_argument, &opts.o_xpath, 1 },
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{ "version", no_argument, &opts.o_version, 1 },
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{ "warn", no_argument, NULL, 'W' },
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{ "warn-xml", no_argument, &opts.o_warn_xml, 1 },
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{ "wrap", required_argument, &opts.o_wrap, 1 },
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{ NULL, 0, NULL, 0 }
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};
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int
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main (int argc UNUSED, char **argv)
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{
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char *fmt = NULL, *cp, *np;
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char *opt_opener = NULL, *opt_closer = NULL, *opt_wrapper = NULL;
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char *opt_options = NULL;
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int opt_depth = 0;
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int opt_not_first = 0;
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int rc;
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argc = xo_parse_args(argc, argv);
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if (argc < 0)
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return 1;
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while ((rc = getopt_long(argc, argv, "c:HJl:O:o:ps:TXW",
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long_opts, NULL)) != -1) {
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switch (rc) {
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case 'c':
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opt_closer = optarg;
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xo_set_flags(NULL, XOF_IGNORE_CLOSE);
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break;
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case 'H':
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xo_set_style(NULL, XO_STYLE_HTML);
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break;
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case 'J':
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xo_set_style(NULL, XO_STYLE_JSON);
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break;
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case 'l':
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xo_set_leading_xpath(NULL, optarg);
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break;
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case 'O':
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opt_options = optarg;
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break;
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case 'o':
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opt_opener = optarg;
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break;
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case 'p':
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xo_set_flags(NULL, XOF_PRETTY);
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break;
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case 's':
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if (xo_set_style_name(NULL, optarg) < 0)
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xo_errx(1, "unknown style: %s", optarg);
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break;
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case 'T':
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xo_set_style(NULL, XO_STYLE_TEXT);
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break;
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case 'X':
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xo_set_style(NULL, XO_STYLE_XML);
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break;
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case 'W':
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opt_warn = 1;
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xo_set_flags(NULL, XOF_WARN);
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break;
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case ':':
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xo_errx(1, "missing argument");
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break;
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case 0:
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if (opts.o_depth) {
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opt_depth = atoi(optarg);
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} else if (opts.o_help) {
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print_help();
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return 1;
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} else if (opts.o_not_first) {
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opt_not_first = 1;
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} else if (opts.o_xpath) {
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xo_set_flags(NULL, XOF_XPATH);
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} else if (opts.o_version) {
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print_version();
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return 0;
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} else if (opts.o_warn_xml) {
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opt_warn = 1;
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xo_set_flags(NULL, XOF_WARN | XOF_WARN_XML);
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} else if (opts.o_wrap) {
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opt_wrapper = optarg;
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} else {
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print_help();
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return 1;
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}
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bzero(&opts, sizeof(opts)); /* Reset all the options */
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break;
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default:
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print_help();
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return 1;
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}
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}
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argc -= optind;
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argv += optind;
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if (opt_options) {
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rc = xo_set_options(NULL, opt_options);
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if (rc < 0)
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xo_errx(1, "invalid options: %s", opt_options);
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}
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xo_set_formatter(NULL, formatter, checkpoint);
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xo_set_flags(NULL, XOF_NO_VA_ARG | XOF_NO_TOP | XOF_NO_CLOSE);
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fmt = *argv++;
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if (opt_opener == NULL && opt_closer == NULL && fmt == NULL) {
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print_help();
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return 1;
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}
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if (opt_not_first)
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xo_set_flags(NULL, XOF_NOT_FIRST);
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if (opt_closer) {
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opt_depth += 1;
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for (cp = opt_closer; cp && *cp; cp = np) {
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np = strchr(cp, '/');
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if (np == NULL)
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break;
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np += 1;
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opt_depth += 1;
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}
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}
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if (opt_depth > 0)
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xo_set_depth(NULL, opt_depth);
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if (opt_opener) {
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for (cp = opt_opener; cp && *cp; cp = np) {
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np = strchr(cp, '/');
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if (np)
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*np = '\0';
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xo_open_container(cp);
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if (np)
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*np++ = '/';
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}
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}
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if (opt_wrapper) {
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for (cp = opt_wrapper; cp && *cp; cp = np) {
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np = strchr(cp, '/');
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if (np)
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*np = '\0';
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xo_open_container(cp);
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if (np)
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*np++ = '/';
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}
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}
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if (fmt && *fmt) {
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save_argv = argv;
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prep_arg(fmt);
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xo_emit(fmt);
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}
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while (opt_wrapper) {
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np = strrchr(opt_wrapper, '/');
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xo_close_container(np ? np + 1 : opt_wrapper);
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if (np)
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*np = '\0';
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else
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opt_wrapper = NULL;
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}
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while (opt_closer) {
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np = strrchr(opt_closer, '/');
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xo_close_container(np ? np + 1 : opt_closer);
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if (np)
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*np = '\0';
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else
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opt_closer = NULL;
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}
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xo_finish();
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return 0;
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}
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