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/*
* parseargs.cc
*
* Command line argument parser.
*
* Copyright 1996-2003 Glyph & Cog, LLC
*/
/*========================================================================
Modified under the Poppler project - http://poppler.freedesktop.org
Poppler project changes to this file are under the GPLv2 or later license
All changes made under the Poppler project to this file are licensed
under GPL version 2 or later
Copyright (C) 2008, 2009, 2018 Albert Astals Cid <[email protected]>
Copyright (C) 2011, 2012 Adrian Johnson <[email protected]>
To see a description of the changes please see the Changelog file that
came with your tarball or type make ChangeLog if you are building from git
========================================================================*/
#include <cstdio>
#include <cstddef>
#include <cstring>
#include <cstdlib>
#include <cctype>
#include "parseargs.h"
#include "goo/gstrtod.h"
#include "goo/GooString.h"
static const ArgDesc *findArg(const ArgDesc *args, char *arg);
static bool grabArg(const ArgDesc *arg, int i, int *argc, char *argv[]);
bool parseArgs(const ArgDesc *args, int *argc, char *argv[])
{
const ArgDesc *arg;
int i, j;
bool ok;
ok = true;
i = 1;
while (i < *argc) {
if (!strcmp(argv[i], "--")) {
--*argc;
for (j = i; j < *argc; ++j) {
argv[j] = argv[j + 1];
}
break;
} else if ((arg = findArg(args, argv[i]))) {
if (!grabArg(arg, i, argc, argv)) {
ok = false;
}
} else {
++i;
}
}
return ok;
}
void printUsage(const char *program, const char *otherArgs, const ArgDesc *args)
{
const ArgDesc *arg;
const char *typ;
int w, w1;
w = 0;
for (arg = args; arg->arg; ++arg) {
if ((w1 = strlen(arg->arg)) > w) {
w = w1;
}
}
fprintf(stderr, "Usage: %s [options]", program);
if (otherArgs) {
fprintf(stderr, " %s", otherArgs);
}
fprintf(stderr, "\n");
for (arg = args; arg->arg; ++arg) {
fprintf(stderr, " %s", arg->arg);
w1 = 9 + w - strlen(arg->arg);
switch (arg->kind) {
case argInt:
case argIntDummy:
typ = " <int>";
break;
case argFP:
case argFPDummy:
typ = " <fp>";
break;
case argString:
case argStringDummy:
case argGooString:
typ = " <string>";
break;
case argFlag:
case argFlagDummy:
default:
typ = "";
break;
}
fprintf(stderr, "%-*s", w1, typ);
if (arg->usage) {
fprintf(stderr, ": %s", arg->usage);
}
fprintf(stderr, "\n");
}
}
static const ArgDesc *findArg(const ArgDesc *args, char *arg)
{
const ArgDesc *p;
for (p = args; p->arg; ++p) {
if (p->kind < argFlagDummy && !strcmp(p->arg, arg)) {
return p;
}
}
return nullptr;
}
static bool grabArg(const ArgDesc *arg, int i, int *argc, char *argv[])
{
int n;
int j;
bool ok;
ok = true;
n = 0;
switch (arg->kind) {
case argFlag:
*(bool *)arg->val = true;
n = 1;
break;
case argInt:
if (i + 1 < *argc && isInt(argv[i + 1])) {
*(int *)arg->val = atoi(argv[i + 1]);
n = 2;
} else {
ok = false;
n = 1;
}
break;
case argFP:
if (i + 1 < *argc && isFP(argv[i + 1])) {
*(double *)arg->val = gatof(argv[i + 1]);
n = 2;
} else {
ok = false;
n = 1;
}
break;
case argString:
if (i + 1 < *argc) {
strncpy((char *)arg->val, argv[i + 1], arg->size - 1);
((char *)arg->val)[arg->size - 1] = '\0';
n = 2;
} else {
ok = false;
n = 1;
}
break;
case argGooString:
if (i + 1 < *argc) {
((GooString *)arg->val)->Set(argv[i + 1]);
n = 2;
} else {
ok = false;
n = 1;
}
break;
default:
fprintf(stderr, "Internal error in arg table\n");
n = 1;
break;
}
if (n > 0) {
*argc -= n;
for (j = i; j < *argc; ++j) {
argv[j] = argv[j + n];
}
}
return ok;
}
bool isInt(const char *s)
{
if (*s == '-' || *s == '+') {
++s;
}
while (isdigit(*s)) {
++s;
}
if (*s) {
return false;
}
return true;
}
bool isFP(const char *s)
{
int n;
if (*s == '-' || *s == '+') {
++s;
}
n = 0;
while (isdigit(*s)) {
++s;
++n;
}
if (*s == '.') {
++s;
}
while (isdigit(*s)) {
++s;
++n;
}
if (n > 0 && (*s == 'e' || *s == 'E')) {
++s;
if (*s == '-' || *s == '+') {
++s;
}
n = 0;
if (!isdigit(*s)) {
return false;
}
do {
++s;
} while (isdigit(*s));
}
if (*s) {
return false;
}
return true;
}
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