Cytoplasm/src/Args.c

119 lines
3.4 KiB
C
Raw Normal View History

/*
* Copyright (C) 2022-2024 Jordan Bancino <@jordan:bancino.net>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <Args.h>
#include <Memory.h>
#include <Log.h>
#include <Str.h>
#include <ctype.h>
#include <string.h>
void
ArgParseStateInit(ArgParseState * state)
{
state->optPos = 1;
state->optErr = 1;
state->optInd = 1;
state->optOpt = 0;
state->optArg = NULL;
}
int
ArgParse(ArgParseState * state, Array * args, const char *optStr)
{
const char *arg;
arg = ArrayGet(args, state->optInd);
if (arg && StrEquals(arg, "--"))
{
state->optInd++;
return -1;
}
else if (!arg || arg[0] != '-' || !isalnum((unsigned char) arg[1]))
{
return -1;
}
else
{
const char *opt = strchr(optStr, arg[state->optPos]);
state->optOpt = arg[state->optPos];
if (!opt)
{
if (state->optErr && *optStr != ':')
{
Log(LOG_ERR, "Illegal option: %c", ArrayGet(args, 0), state->optOpt);
}
if (!arg[++state->optPos])
{
state->optInd++;
state->optPos = 1;
}
return '?';
}
else if (opt[1] == ':')
{
if (arg[state->optPos + 1])
{
state->optArg = (char *) arg + state->optPos + 1;
state->optInd++;
state->optPos = 1;
return state->optOpt;
}
else if (ArrayGet(args, state->optInd + 1))
{
state->optArg = (char *) ArrayGet(args, state->optInd + 1);
state->optInd += 2;
state->optPos = 1;
return state->optOpt;
}
else
{
if (state->optErr && *optStr != ':')
{
Log(LOG_ERR, "Option requires an argument: %c", state->optOpt);
}
if (!arg[++state->optPos])
{
state->optInd++;
state->optPos = 1;
}
return *optStr == ':' ? ':' : '?';
}
}
else
{
if (!arg[++state->optPos])
{
state->optInd++;
state->optPos = 1;
}
return state->optOpt;
}
}
}