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/* This file is part of cfpeek -*- c -*-
Copyright (C) 2011, 2012 Sergey Poznyakoff
Cfpeek is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
Cfpeek is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with cfpeek. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_GETOPT_H
# include <getopt.h>
#endif
#include <unistd.h>
#include "grecs/gitid.h"
static struct grecs_txtacc *pp_cmd_acc;
char *program_name;
#define PREPROC_NOT_SET 0
#define PREPROC_SET 1
#define PREPROC_DEFAULT 2
static int preproc_settings = PREPROC_NOT_SET;
#define CFPEEK_NODE_FLAG_DEFAULT \
(GRECS_NODE_FLAG_PATH|GRECS_NODE_FLAG_VALUE|GRECS_NODE_FLAG_DESCEND)
static int flags_on, flags_off;
struct format_flag {
char *name;
char *arg;
char *descr;
int flag;
void (*handler)(const char *);
};
static void
set_parent_option(const char *str)
{
struct locate_instr *instr = new_locate_instr();
instr->cmd = locate_parent;
instr->v.s = grecs_strdup(str);
}
static void
set_child_option(const char *str)
{
struct locate_instr *instr = new_locate_instr();
instr->cmd = locate_child;
instr->v.s = grecs_strdup(str);
}
static void
set_sibling_option(const char *str)
{
struct locate_instr *instr = new_locate_instr();
instr->cmd = locate_sibling;
instr->v.s = grecs_strdup(str);
}
static void
set_up_option(const char *str)
{
struct locate_instr *instr = new_locate_instr();
instr->cmd = locate_up;
instr->v.n = atoi(str);
}
static void
set_down_option(const char *str)
{
struct locate_instr *instr = new_locate_instr();
instr->cmd = locate_down;
instr->v.n = atoi(str);
}
static void
set_delim_option(const char *str)
{
flags_on |= *str & 0xff;
}
struct format_flag format_flag_table[] = {
{ "parent", "NAME", "print the parent node with the given NAME",
0, set_parent_option },
{ "child", "NAME", "print the child node with the given NAME",
0, set_child_option },
{ "up", "NUMBER", "ascend NUMBER of nodes",
0, set_up_option },
{ "down", "NUMBER", "descend NUMBER of nodes",
0, set_down_option },
{ "sibling",
"NAME", "locate a sibling with the given NAME and print it",
0, set_sibling_option },
{ "delim", "CHAR", "set path component delimiter",
0, set_delim_option },
{ "locus", NULL, "print locations",
GRECS_NODE_FLAG_LOCUS },
{ "path", NULL, "print paths",
GRECS_NODE_FLAG_PATH },
{ "value", NULL, "print values",
GRECS_NODE_FLAG_VALUE },
{ "quote", NULL, "always quote values",
GRECS_NODE_FLAG_QUOTE },
{ "never-quote", NULL, "never quote values",
GRECS_NODE_FLAG_NOQUOTE },
{ "quote-hex", NULL, "show unprintable characters as hex",
GRECS_NODE_FLAG_QUOTE_HEX },
{ "descend", NULL, "descend into subnodes",
GRECS_NODE_FLAG_DESCEND },
{ "default", NULL, "set default options",
CFPEEK_NODE_FLAG_DEFAULT },
{ NULL }
};
static void
flags_help(FILE *stream)
{
struct format_flag *fp;
fprintf(stream, "[*] FLAGS is a comma-separated list of the following:\n");
for (fp = format_flag_table; fp->name; fp++) {
int n;
fprintf(stream, " ");
if (fp->arg)
n = fprintf(stream, "%s=%s", fp->name, fp->arg);
else
n = fprintf(stream, "[no]%s", fp->name);
if (n < 24)
n = 24 - n;
else
n = 2;
fprintf(stream, "%*s%s\n", n, "", fp->descr);
}
fputc('\n', stream);
}
static const char *
cmpasgn(const char *a, const char *b)
{
for (; *a && *b; a++, b++) {
if (*a != *b)
return NULL;
}
if (*a == 0 && *b == '=')
return b+1;
return NULL;
}
static void
set_flag(const char *str)
{
struct format_flag *fp;
for (fp = format_flag_table; fp->name; fp++) {
if (fp->arg) {
const char *arg = cmpasgn(fp->name, str);
if (arg) {
fp->handler(arg);
return;
}
} else if (strcmp(str, fp->name) == 0) {
if (fp->handler)
fp->handler(str);
else
flags_on |= fp->flag;
return;
} else if (strncmp(str, "no", 2) == 0 &&
strcmp(str + 2, fp->name) == 0) {
if (fp->handler)
fp->handler(str);
else
flags_off |= fp->flag;
return;
}
}
grecs_error(NULL, 0, "unknown option: %s", str);
}
OPTIONS_BEGIN("cfpeek",
[<Get variables from a configuration file>],
[<FILE [PATH...]>],
[<gnu>],
[<copyright_year=2011,2012>],
[<copyright_holder=Sergey Poznyakoff>])
GROUP(Output control)
OPTION(format,H,[<FLAGS>],
[<set output format flags [*]>])
BEGIN
int i;
struct wordsplit ws;
ws.ws_delim = ",";
if (wordsplit(optarg, &ws,
WRDSF_DELIM|WRDSF_SQUEEZE_DELIMS|
WRDSF_NOVAR|WRDSF_NOCMD|WRDSF_SHOWERR))
exit(EX_SOFTWARE);
for (i = 0; i < ws.ws_wordc; i++) {
set_flag(ws.ws_wordv[i]);
}
wordsplit_free(&ws);
END
OPTION(quiet,q,,
[<suppress error diagnostics>])
BEGIN
quiet_option++;
END
GROUP(Modifiers)
OPTION(parser,p,[<GRECS|META1|BIND|GIT|PATH>],
[<set parser type>])
BEGIN
if (strcasecmp(optarg, "GRECS") == 0) {
grecs_parser_fun = grecs_grecs_parser;
if (preproc_settings == PREPROC_NOT_SET)
preproc_settings = PREPROC_DEFAULT;
} else if (strcasecmp(optarg, "META1") == 0)
grecs_parser_fun = grecs_meta1_parser;
else if (strcasecmp(optarg, "BIND") == 0)
grecs_parser_fun = grecs_bind_parser;
else if (strcasecmp(optarg, "DHCPD") == 0)
grecs_parser_fun = grecs_dhcpd_parser;
else if (strcasecmp(optarg, "GIT") == 0)
grecs_parser_fun = grecs_git_parser;
else if (strcasecmp(optarg, "PATH") == 0)
grecs_parser_fun = grecs_path_parser;
else {
grecs_error(NULL, 0, "unsupported parser type");
exit(EX_USAGE);
}
END
OPTION(literal,L,,
[<use literal matching>])
BEGIN
mode = MODE_LITERAL;
END
OPTION(reduce,r,,
[<reduce the tree>])
BEGIN
reduce_option = 1;
END
OPTION(sort,S,,
[<sort parse tree lexicografically>])
BEGIN
sort_option = 1;
END
OPTION(matches,m,NUMBER,
[<output at most NUMBER matches>])
BEGIN
max_matches = atoi(optarg);
END
OPTION(set,s,PATH=VAL,
[<set a keyword>])
BEGIN
struct wordsplit ws;
ws.ws_delim = "=";
if (wordsplit(optarg, &ws, WRDSF_NOVAR | WRDSF_NOCMD |
WRDSF_QUOTE | WRDSF_CESCAPES |
WRDSF_DELIM)) {
grecs_error(NULL, 0, "cannot split string: %s",
wordsplit_strerror(&ws));
exit(EX_SOFTWARE);
}
if (ws.ws_wordc != 2) {
grecs_error(NULL, 0, "set: invalid syntax");
exit(EX_USAGE);
}
OPTNODE(ws.ws_wordv[0], ws.ws_wordv[1]);
wordsplit_free(&ws);
END
GROUP(Scripting)
OPTION(lang,l,NAME,
[<select scripting language to use>])
BEGIN
script_select(optarg);
END
OPTION(file,f,FILE,
[<load the script FILE>])
BEGIN
script_file = optarg;
END
OPTION(expression,e,EXPR,
[<apply this expression to each node found>])
BEGIN
script_expr = optarg;
END
OPTION(init,i,EXPR,
[<initial setup expession>])
BEGIN
script_init_expr = optarg;
END
GROUP(Preprocessor control)
OPTION(include-directory,I,DIR,
[<add include directory>])
BEGIN
if (preproc_settings == PREPROC_NOT_SET)
preproc_settings = PREPROC_DEFAULT;
grecs_preproc_add_include_dir(optarg);
END
OPTION(define,D,SYMBOL[=VALUE],
[<define a preprocessor symbol>])
BEGIN
char *p;
if (preproc_settings == PREPROC_NOT_SET)
preproc_settings = PREPROC_DEFAULT;
if (!pp_cmd_acc)
pp_cmd_acc = grecs_txtacc_create();
grecs_txtacc_grow(pp_cmd_acc, " \"-D", 4);
for (p = optarg; *p; p++) {
if (*p == '\\' || *p == '"')
grecs_txtacc_grow_char(pp_cmd_acc, '\\');
grecs_txtacc_grow_char(pp_cmd_acc, *p);
}
grecs_txtacc_grow_char(pp_cmd_acc, '"');
END
OPTION(preprocessor,P,COMMAND,
[<use COMMAND instead of the default preprocessor>])
BEGIN
grecs_preprocessor = optarg;
preproc_settings = PREPROC_SET;
END
OPTION(no-preprocessor,N,,
[<disable preprocessing>])
BEGIN
grecs_preprocessor = NULL;
preproc_settings = PREPROC_SET;
END
GROUP(Debugging)
OPTION(debug-parser,x,,
[<debug configuration file parser>])
BEGIN
grecs_gram_trace(1);
END
OPTION(debug-lexer,X,,
[<debug configuration file lexer>])
BEGIN
grecs_lex_trace(1);
END
OPTIONS_END
void
cfpeek_version_hook(FILE *stream)
{
fprintf(stream, "compiled with:\n");
fprintf(stream, " Grecs %s\n", GRECS_GIT_ID);
#ifdef GUILE_VERSION
fprintf(stream, " Guile %s\n", GUILE_VERSION);
#endif
}
void
parse_options(int argc, char *argv[])
{
program_name = strrchr(argv[0], '/');
if (program_name)
program_name++;
else
program_name = argv[0];
print_help_hook = flags_help;
print_version_hook = cfpeek_version_hook;
GETOPT(argc, argv, file_index, exit(EX_USAGE))
if (!(flags_on & _GRECS_NODE_MASK_OUTPUT))
flags_on |= GRECS_NODE_FLAG_PATH|GRECS_NODE_FLAG_VALUE;
flags = flags_on & ~flags_off;
if (!(flags & (GRECS_NODE_FLAG_PATH|GRECS_NODE_FLAG_VALUE))) {
grecs_warning(NULL, 0, "assuming --format=path,value");
flags |= GRECS_NODE_FLAG_PATH|GRECS_NODE_FLAG_VALUE;
}
if (preproc_settings == PREPROC_DEFAULT)
grecs_preprocessor = DEFAULT_PREPROCESSOR;
if (pp_cmd_acc && grecs_preprocessor) {
char *args, *cmd;
grecs_txtacc_grow_char(pp_cmd_acc, 0);
args = grecs_txtacc_finish(pp_cmd_acc, 0);
cmd = grecs_malloc(strlen(grecs_preprocessor) +
strlen(args) + 1);
strcpy(cmd, grecs_preprocessor);
strcat(cmd, args);
grecs_preprocessor = cmd;
}
grecs_txtacc_free(pp_cmd_acc);
script_init();
}
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