mirror of
https://github.com/gnif/LookingGlass.git
synced 2024-12-23 06:11:46 +00:00
806 lines
17 KiB
C
806 lines
17 KiB
C
/**
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* Looking Glass
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* Copyright © 2017-2021 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "common/option.h"
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#include "common/debug.h"
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#include "common/stringutils.h"
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#include <ctype.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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struct OptionGroup
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{
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const char * module;
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struct Option ** options;
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int count;
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int pad;
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};
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struct State
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{
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enum doHelpMode doHelp;
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struct Option ** options;
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int oCount;
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struct OptionGroup * groups;
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int gCount;
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};
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static struct State state =
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{
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.doHelp = DOHELP_MODE_NO,
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.options = NULL,
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.oCount = 0,
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.groups = NULL,
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.gCount = 0
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};
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static bool int_parser(struct Option * opt, const char * str)
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{
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opt->value.x_int = atol(str);
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return true;
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}
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static bool bool_parser(struct Option * opt, const char * str)
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{
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opt->value.x_bool =
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strcasecmp(str, "1" ) == 0 ||
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strcasecmp(str, "on" ) == 0 ||
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strcasecmp(str, "yes" ) == 0 ||
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strcasecmp(str, "true") == 0;
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return true;
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}
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static bool float_parser(struct Option * opt, const char * str)
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{
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opt->value.x_float = atof(str);
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return true;
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}
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static bool string_parser(struct Option * opt, const char * str)
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{
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free(opt->value.x_string);
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opt->value.x_string = strdup(str);
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return true;
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}
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static char * int_toString(struct Option * opt)
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{
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int len = snprintf(NULL, 0, "%d", opt->value.x_int);
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char * ret = malloc(len + 1);
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sprintf(ret, "%d", opt->value.x_int);
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return ret;
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}
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static char * bool_toString(struct Option * opt)
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{
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return strdup(opt->value.x_bool ? "yes" : "no");
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}
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static char * float_toString(struct Option * opt)
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{
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int len = snprintf(NULL, 0, "%f", opt->value.x_float);
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char * ret = malloc(len + 1);
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sprintf(ret, "%f", opt->value.x_float);
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return ret;
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}
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static char * string_toString(struct Option * opt)
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{
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if (!opt->value.x_string)
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return NULL;
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return strdup(opt->value.x_string);
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}
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bool option_register(struct Option options[])
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{
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int new = 0;
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for(int i = 0; options[i].type != OPTION_TYPE_NONE; ++i)
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++new;
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state.options = realloc(
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state.options,
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sizeof(*state.options) * (state.oCount + new)
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);
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for(int i = 0; options[i].type != OPTION_TYPE_NONE; ++i)
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{
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state.options[state.oCount + i] = (struct Option *)malloc(sizeof(**state.options));
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struct Option * o = state.options[state.oCount + i];
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memcpy(o, &options[i], sizeof(*o));
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if (!o->parser)
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{
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switch(o->type)
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{
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case OPTION_TYPE_INT:
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o->parser = int_parser;
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break;
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case OPTION_TYPE_STRING:
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o->parser = string_parser;
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break;
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case OPTION_TYPE_BOOL:
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o->parser = bool_parser;
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break;
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case OPTION_TYPE_FLOAT:
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o->parser = float_parser;
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break;
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default:
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DEBUG_ERROR("BUG: Non int/string/bool option types must have a parser");
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continue;
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}
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}
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if (!o->toString)
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{
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switch(o->type)
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{
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case OPTION_TYPE_INT:
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o->toString = int_toString;
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break;
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case OPTION_TYPE_STRING:
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o->toString = string_toString;
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break;
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case OPTION_TYPE_BOOL:
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o->toString = bool_toString;
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break;
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case OPTION_TYPE_FLOAT:
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o->toString = float_toString;
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break;
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default:
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DEBUG_ERROR("BUG: Non int/string/bool option types must implement toString");
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continue;
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}
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}
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// ensure the string is locally allocated
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if (o->type == OPTION_TYPE_STRING)
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{
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if (o->value.x_string)
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o->value.x_string = strdup(o->value.x_string);
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}
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// add the option to the correct group for help printout
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bool found = false;
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for(int g = 0; g < state.gCount; ++g)
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{
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struct OptionGroup * group = &state.groups[g];
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if (strcmp(group->module, o->module) != 0)
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continue;
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found = true;
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group->options = realloc(
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group->options,
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sizeof(*group->options) * (group->count + 1)
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);
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group->options[group->count] = o;
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int len = strlen(o->name);
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if (len > group->pad)
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group->pad = len;
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++group->count;
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break;
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}
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if (!found)
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{
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state.groups = realloc(
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state.groups,
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sizeof(*state.groups) * (state.gCount + 1)
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);
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struct OptionGroup * group = &state.groups[state.gCount];
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++state.gCount;
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group->module = o->module;
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group->options = malloc(sizeof(*group->options));
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group->options[0] = o;
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group->count = 1;
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group->pad = strlen(o->name);
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}
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}
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state.oCount += new;
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return true;
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};
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void option_free(void)
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{
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for(int i = 0; i < state.oCount; ++i)
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{
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struct Option * o = state.options[i];
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if (o->type == OPTION_TYPE_STRING)
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free(o->value.x_string);
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free(o);
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}
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free(state.options);
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state.options = NULL;
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state.oCount = 0;
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for(int g = 0; g < state.gCount; ++g)
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{
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struct OptionGroup * group = &state.groups[g];
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if (group->options)
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free(group->options);
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}
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free(state.groups);
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state.groups = NULL;
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state.gCount = 0;
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}
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static bool option_set(struct Option * opt, const char * value)
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{
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if (!opt->parser(opt, value))
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{
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opt->failed_set = true;
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return false;
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}
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opt->failed_set = false;
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return true;
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}
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bool option_parse(int argc, char * argv[])
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{
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for(int a = 1; a < argc; ++a)
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{
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struct Option * o = NULL;
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char * value = NULL;
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// emulate getopt for backwards compatability
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if (argv[a][0] == '-')
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{
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if (strcasecmp(argv[a], "-h") == 0 || strcasecmp(argv[a], "--help") == 0)
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{
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state.doHelp = DOHELP_MODE_YES;
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continue;
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}
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if (strcasecmp(argv[a], "--rst-help") == 0)
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{
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state.doHelp = DOHELP_MODE_RST;
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continue;
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}
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if (strlen(argv[a]) != 2)
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{
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DEBUG_WARN("Ignored invalid argument: %s", argv[a]);
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continue;
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}
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for(int i = 0; i < state.oCount; ++i)
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{
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if (state.options[i]->shortopt == argv[a][1])
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{
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o = state.options[i];
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if (o->type != OPTION_TYPE_BOOL && a < argc - 1)
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{
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++a;
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value = strdup(argv[a]);
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}
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break;
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}
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}
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}
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else
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{
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char * arg = strdup(argv[a]);
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char * module = strtok(arg , ":");
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char * name = strtok(NULL, "=");
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value = strtok(NULL, "" );
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if (!module || !name)
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{
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DEBUG_WARN("Ignored invalid argument: %s", argv[a]);
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free(arg);
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continue;
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}
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o = option_get(module, name);
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if (value)
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value = strdup(value);
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free(arg);
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}
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if (!o)
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{
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DEBUG_WARN("Ignored unknown argument: %s", argv[a]);
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free(value);
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continue;
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}
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if (!value)
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{
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if (o->type == OPTION_TYPE_BOOL)
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{
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o->value.x_bool = !o->value.x_bool;
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continue;
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}
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else if (o->type != OPTION_TYPE_CUSTOM)
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{
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DEBUG_WARN("Ignored invalid argument, missing value: %s", argv[a]);
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continue;
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}
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}
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option_set(o, value);
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free(value);
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}
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return true;
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}
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static char * file_parse_module(FILE * fp)
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{
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char * module = NULL;
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int len = 0;
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for(int c = fgetc(fp); !feof(fp); c = fgetc(fp))
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{
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switch(c)
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{
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case ']':
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if (module)
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module[len] = '\0';
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return module;
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case '\r':
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case '\n':
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free(module);
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return NULL;
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default:
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if (len % 32 == 0)
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module = realloc(module, len + 32 + 1);
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module[len++] = c;
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}
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}
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if (module)
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free(module);
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return NULL;
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}
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static bool process_option_line(const char * module, const char * name,
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char * value, int valueLen, int lineno)
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{
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if (!module)
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{
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DEBUG_ERROR("Syntax error on line %d, module not specified for option", lineno);
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return false;
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}
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struct Option * o = option_get(module, name);
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if (!o)
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DEBUG_WARN("Ignored unknown option %s:%s", module, name);
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else
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{
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if (value)
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value[valueLen] = '\0';
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if (!option_set(o, value))
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DEBUG_ERROR("Failed to set the option value");
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}
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return true;
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}
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bool option_load(const char * filename)
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{
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FILE * fp = fopen(filename, "r");
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if (!fp)
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return false;
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bool result = true;
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int lineno = 1;
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char * module = NULL;
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bool line = true;
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bool comment = false;
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bool expectLine = false;
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bool expectValue = false;
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char * name = NULL;
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int nameLen = 0;
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char * value = NULL;
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int valueLen = 0;
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char ** p = &name;
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int * len = &nameLen;
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for(int c = fgetc(fp); !feof(fp); c = fgetc(fp))
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{
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if (comment && c != '\n')
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continue;
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comment = false;
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switch(c)
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{
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case '[':
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if (expectLine)
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{
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DEBUG_ERROR("Syntax error on line %d, expected new line", lineno);
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result = false;
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goto exit;
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}
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if (line)
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{
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free(module);
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module = file_parse_module(fp);
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if (!module)
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{
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DEBUG_ERROR("Syntax error on line %d, failed to parse the module", lineno);
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result = false;
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goto exit;
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}
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line = false;
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expectLine = true;
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continue;
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}
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if (*len % 32 == 0)
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*p = realloc(*p, *len + 32 + 1);
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(*p)[(*len)++] = c;
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break;
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case '\r':
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continue;
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case '\n':
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if (name && !process_option_line(module, name, value, valueLen, lineno))
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{
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result = false;
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goto exit;
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}
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line = true;
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expectLine = false;
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expectValue = false;
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++lineno;
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p = &name;
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len = &nameLen;
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free(name);
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name = NULL;
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nameLen = 0;
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free(value);
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value = NULL;
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valueLen = 0;
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break;
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case '=':
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if (!expectValue)
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{
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if (!name)
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{
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DEBUG_ERROR("Syntax error on line %d, expected option name", lineno);
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result = false;
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goto exit;
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}
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//rtrim
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while (nameLen > 1 && isspace(name[nameLen-1]))
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--nameLen;
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name[nameLen] = '\0';
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expectValue = true;
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p = &value;
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len = &valueLen;
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continue;
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}
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if (*len % 32 == 0)
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*p = realloc(*p, *len + 32 + 1);
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(*p)[(*len)++] = c;
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break;
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case ';':
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if (line)
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{
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comment = true;
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break;
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}
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// fallthrough
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default:
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// ignore non-typeable ascii characters
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if (c < 32 || c > 126)
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continue;
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if (expectLine)
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{
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DEBUG_ERROR("Syntax error on line %d, expected new line", lineno);
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result = false;
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goto exit;
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}
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line = false;
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|
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//ltrim
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if (*len == 0 && isspace(c))
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break;
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if (*len % 32 == 0)
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*p = realloc(*p, *len + 32 + 1);
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(*p)[(*len)++] = c;
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break;
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}
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}
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if (name && !process_option_line(module, name, value, valueLen, lineno))
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result = false;
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exit:
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fclose(fp);
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free(module);
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free(name );
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free(value );
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return result;
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}
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bool option_validate(void)
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{
|
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if (state.doHelp != DOHELP_MODE_NO)
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{
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option_print();
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return false;
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}
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// validate the option values
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bool ok = true;
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for(int i = 0; i < state.oCount; ++i)
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{
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struct Option * o = state.options[i];
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const char * error = NULL;
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bool invalid = o->failed_set;
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if (!invalid && o->validator)
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invalid = !o->validator(o, &error);
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if (invalid)
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{
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printf("\nInvalid value provided to the option: %s:%s\n", o->module, o->name);
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|
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if (error)
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printf("\n Error: %s\n", error);
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if (o->getValues)
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{
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StringList values = o->getValues(o);
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printf("\nValid values are:\n\n");
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for(unsigned int v = 0; v < stringlist_count(values); ++v)
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printf(" * %s\n", stringlist_at(values, v));
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stringlist_free(&values);
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}
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|
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if (o->printHelp)
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{
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printf("\n");
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o->printHelp();
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}
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ok = false;
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}
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}
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|
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if (!ok)
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printf("\n");
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return ok;
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}
|
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|
|
void option_print_hrule(char * headerLine, int maxLen, char ruleChar)
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{
|
|
printf(" +%c", ruleChar);
|
|
for (int i = 0; i < maxLen; i++)
|
|
{
|
|
if(i < strlen(headerLine))
|
|
{
|
|
if (headerLine[i] == '|')
|
|
{
|
|
putc('+', stdout);
|
|
continue;
|
|
}
|
|
}
|
|
putc(ruleChar, stdout);
|
|
}
|
|
printf("%c+\n", ruleChar);
|
|
}
|
|
|
|
void option_print(void)
|
|
{
|
|
printf(
|
|
"The following is a complete list of options accepted by this application\n\n"
|
|
);
|
|
|
|
for(int g = 0; g < state.gCount; ++g)
|
|
{
|
|
StringList lines = stringlist_new(true);
|
|
StringList values = stringlist_new(true);
|
|
int len;
|
|
int maxLen;
|
|
int valueLen = 5;
|
|
char * line;
|
|
char * headerLine;
|
|
|
|
// ensure the pad length is atleast as wide as the heading
|
|
if (state.groups[g].pad < 4)
|
|
state.groups[g].pad = 4;
|
|
|
|
// get the values and the max value length
|
|
for(int i = 0; i < state.groups[g].count; ++i)
|
|
{
|
|
struct Option * o = state.groups[g].options[i];
|
|
char * value = o->toString(o);
|
|
if (!value)
|
|
{
|
|
value = strdup("NULL");
|
|
len = 4;
|
|
}
|
|
else
|
|
len = strlen(value);
|
|
|
|
if (len > valueLen)
|
|
valueLen = len;
|
|
|
|
stringlist_push(values, value);
|
|
}
|
|
|
|
// add the heading
|
|
maxLen = alloc_sprintf(
|
|
&line,
|
|
"%-*s | Short | %-*s | Description",
|
|
(int)(strlen(state.groups[g].module) + state.groups[g].pad + 1),
|
|
"Long",
|
|
valueLen,
|
|
"Value"
|
|
);
|
|
|
|
DEBUG_ASSERT(maxLen > 0);
|
|
headerLine = line;
|
|
stringlist_push(lines, line);
|
|
|
|
for(int i = 0; i < state.groups[g].count; ++i)
|
|
{
|
|
struct Option * o = state.groups[g].options[i];
|
|
char * value = stringlist_at(values, i);
|
|
|
|
len = alloc_sprintf(
|
|
&line,
|
|
"%s:%-*s | %c%c | %-*s | %s",
|
|
o->module,
|
|
state.groups[g].pad,
|
|
o->name,
|
|
o->shortopt ? '-' : ' ',
|
|
o->shortopt ? o->shortopt : ' ',
|
|
valueLen,
|
|
value,
|
|
o->description
|
|
);
|
|
|
|
DEBUG_ASSERT(len > 0);
|
|
stringlist_push(lines, line);
|
|
if (len > maxLen)
|
|
maxLen = len;
|
|
}
|
|
|
|
stringlist_free(&values);
|
|
|
|
// print out the lines
|
|
for(int i = 0; i < stringlist_count(lines); ++i)
|
|
{
|
|
if (i == 0)
|
|
{
|
|
option_print_hrule(headerLine, maxLen, '-');
|
|
}
|
|
|
|
char * line = stringlist_at(lines, i);
|
|
printf(" | %-*s |\n", maxLen, line);
|
|
|
|
if (i == 0)
|
|
{
|
|
option_print_hrule(headerLine, maxLen, state.doHelp == DOHELP_MODE_RST ? '=' : '-');
|
|
}
|
|
else if (state.doHelp == DOHELP_MODE_RST && i < stringlist_count(lines) - 1)
|
|
{
|
|
option_print_hrule(headerLine, maxLen, '-');
|
|
}
|
|
}
|
|
|
|
option_print_hrule(headerLine, maxLen, '-');
|
|
|
|
stringlist_free(&lines);
|
|
|
|
printf("\n");
|
|
}
|
|
}
|
|
|
|
struct Option * option_get(const char * module, const char * name)
|
|
{
|
|
for(int i = 0; i < state.oCount; ++i)
|
|
{
|
|
struct Option * o = state.options[i];
|
|
if ((strcasecmp(o->module, module) == 0) && (strcasecmp(o->name, name) == 0))
|
|
return o;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int option_get_int(const char * module, const char * name)
|
|
{
|
|
struct Option * o = option_get(module, name);
|
|
if (!o)
|
|
{
|
|
DEBUG_ERROR("BUG: Failed to get the value for option %s:%s", module, name);
|
|
return -1;
|
|
}
|
|
DEBUG_ASSERT(o->type == OPTION_TYPE_INT);
|
|
return o->value.x_int;
|
|
}
|
|
|
|
const char * option_get_string(const char * module, const char * name)
|
|
{
|
|
struct Option * o = option_get(module, name);
|
|
if (!o)
|
|
{
|
|
DEBUG_ERROR("BUG: Failed to get the value for option %s:%s", module, name);
|
|
return NULL;
|
|
}
|
|
DEBUG_ASSERT(o->type == OPTION_TYPE_STRING);
|
|
return o->value.x_string;
|
|
}
|
|
|
|
bool option_get_bool(const char * module, const char * name)
|
|
{
|
|
struct Option * o = option_get(module, name);
|
|
if (!o)
|
|
{
|
|
DEBUG_ERROR("BUG: Failed to get the value for option %s:%s", module, name);
|
|
return false;
|
|
}
|
|
DEBUG_ASSERT(o->type == OPTION_TYPE_BOOL);
|
|
return o->value.x_bool;
|
|
}
|
|
|
|
float option_get_float(const char * module, const char * name)
|
|
{
|
|
struct Option * o = option_get(module, name);
|
|
if (!o)
|
|
{
|
|
DEBUG_ERROR("BUG: Failed to get the value for option %s:%s", module, name);
|
|
return false;
|
|
}
|
|
DEBUG_ASSERT(o->type == OPTION_TYPE_FLOAT);
|
|
return o->value.x_float;
|
|
}
|