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#include <BH/Args.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <memory.h>
static int extractArg(int argc,
char **argv,
BH_ArgsOption *option,
BH_ArgsCallback callback,
void *data,
int *i,
int isLong,
char *next)
{
if (isLong && *next == '=')
return callback(option->key, next + 1, data);
if (!isLong && *next)
return callback(option->key, next, data);
if ((*i) + 1 < argc && !(argv[(*i) + 1][0] == '-' && argv[(*i) + 1][1]))
return callback(option->key, argv[++(*i)], data);
if (option->flags & BH_ARGS_OPTIONAL)
return callback(option->key, NULL, data);
return BH_ERROR;
}
static int parseShort(int argc,
char **argv,
BH_ArgsOption *options,
BH_ArgsCallback callback,
void *data,
int *i)
{
char *symbol;
BH_ArgsOption *option;
for (symbol = argv[*i] + 1; *symbol; symbol++)
{
/* Find and process option */
for (option = options; option->key || option->name; option++)
{
if (option->key > 128 || *symbol != option->key)
continue;
if (option->flags & BH_ARGS_VALUE)
return extractArg(argc, argv, option, callback, data, i, 0, symbol + 1);
if (callback(option->key, NULL, data))
return BH_ERROR;
break;
}
/* Unknown option */
if (!option->key && !option->name)
{
callback(BH_ARGS_UNKNOWN, argv[*i], data);
return BH_ERROR;
}
}
return BH_OK;
}
static int parseLong(int argc,
char **argv,
BH_ArgsOption *options,
BH_ArgsCallback callback,
void *data,
int *i)
{
char *start, *end;
BH_ArgsOption *option;
/* Extract option name from argv */
start = argv[*i] + 2;
end = argv[*i] + 2;
while (isgraph(*end) && *end != '=')
end++;
if (end == start)
return BH_ERROR;
/* Find and process option */
for (option = options; option->key || option->name; option++)
{
if (!option->name || strlen(option->name) != (size_t)(end - start))
continue;
if (memcmp(option->name, start, end - start))
continue;
if (option->flags & BH_ARGS_VALUE)
return extractArg(argc, argv, option, callback, data, i, 1, end);
return callback(option->key, NULL, data);
}
/* Unknown long option */
callback(BH_ARGS_UNKNOWN, argv[*i], data);
return BH_ERROR;
}
int BH_ArgsParse(int argc,
char **argv,
BH_ArgsOption *options,
BH_ArgsCallback callback,
void *data)
{
int i, j, ignoreRest, size;
char *arg;
ignoreRest = 0; i = 1; size = argc;
while (i < argc)
{
arg = argv[i];
if (arg[0] == '-' && arg[1] && !ignoreRest)
{
/* Parse ingore, short or long option */
if (arg[1] == '-')
{
if (arg[2] && parseLong(argc, argv, options, callback, data, &i))
return BH_ERROR;
else if (!arg[2])
ignoreRest = 1;
}
else if (arg[1] && parseShort(argc, argv, options, callback, data, &i))
return BH_ERROR;
i++;
}
else
{
/* Shift arguments */
for (j = i; j < size - 1; j++)
argv[j] = argv[j + 1];
argv[size - 1] = arg;
if (callback(BH_ARGS_ARGUMENT, arg, data))
return BH_ERROR;
argc--;
}
}
return BH_OK;
}
void BH_ArgsHelp(BH_ArgsOption *options,
int padding)
{
int width = 0;
BH_ArgsOption *option;
if (padding == 0)
padding = 30;
/* Calculate option column width */
for (option = options; option->key || option->name; option++)
{
const char *symbol;
width = 5;
/* Print option column with padding */
if (isgraph(option->key))
{
fputs(" -", stdout);
fputc(option->key, stdout);
}
else
fputs(" ", stdout);
if (isgraph(option->key) && option->name)
fputs(", ", stdout);
else
fputs(" ", stdout);
if (option->name)
{
width += 3 + strlen(option->name);
fputs("--", stdout);
fputs(option->name, stdout);
fputc(' ', stdout);
}
if (option->flags & BH_ARGS_VALUE)
{
width += 8;
if (option->flags & BH_ARGS_OPTIONAL)
{
width += 2;
fputs("[<value>] ", stdout);
}
else
fputs("<value> ", stdout);
}
for (; width++ < padding; fputc(' ', stdout));
/* Print description */
for (symbol = option->description; symbol && *symbol; symbol++)
{
fputc(*symbol, stdout);
if (*symbol == '\n')
for (width = 0; width++ < padding; fputc(' ', stdout));
}
fputc('\n', stdout);
}
}
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