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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <ctype.h>
//
// simple sscanf replacement to match scummvm usage patterns
//
bool scanInt(const char **in, va_list *ap, int max) {
// skip leading space characters
while (**in && **in == ' ') {
(*in)++;
}
// number optionally preceeded with a + or - sign.
bool negate = false;
if (**in == '-') {
(*in)++;
negate = true;
}
if (**in == '+') {
(*in)++;
}
int *arg = va_arg(*ap, int*);
char *end;
long n = strtol(*in, &end, 10);
if (negate) {
n = -n;
}
bool err = false;
if (end == *in || (max > 0 && (end - *in) > max)) {
err = true;
} else {
*arg = (int)n;
*in = end;
}
return err;
}
bool scanHex(const char **in, va_list *ap) {
unsigned *arg = va_arg(*ap, unsigned*);
char *end;
long n = strtol(*in, &end, 16);
if (end == *in) {
return true;
}
*in = end;
*arg = (unsigned) n;
return false;
}
bool scanString(const char **in, va_list *ap) {
char *arg = va_arg(*ap, char*);
while (**in && **in != ' ' && **in != '\n' && **in != '\t') {
*arg = **in;
arg++;
(*in)++;
}
*arg = '\0';
(*in)++;
return false;
}
bool scanStringUntil(const char **in, va_list *ap, char c_end) {
char *arg = va_arg(*ap, char*);
while (**in && **in != c_end) {
*arg = **in;
arg++;
(*in)++;
}
*arg = 0;
(*in)++;
return false;
}
bool scanChar(const char **in, va_list *ap) {
char *arg = va_arg(*ap, char*);
if (**in) {
*arg = **in;
(*in)++;
}
return false;
}
extern "C" int simple_sscanf(const char *input, const char *format, ...) {
va_list ap;
int result = 0;
const char *next = input;
va_start(ap, format);
while (*format) {
if (*format == '%') {
format++;
int max = 0;
while (isdigit(*format)) {
max = (max * 10) + (*format - '0');
format++;
}
bool err = false;
switch (*format++) {
case 'c':
err = scanChar(&next, &ap);
break;
case 'd':
case 'u':
err = scanInt(&next, &ap, max);
break;
case 'x':
err = scanHex(&next, &ap);
break;
case 's':
err = scanString(&next, &ap);
break;
case '[':
// assume %[^c]
if ('^' != *format) {
err = true;
} else {
format++;
if (*format && *(format+1) == ']') {
err = scanStringUntil(&next, &ap, *format);
format += 2;
} else {
err = true;
}
}
break;
default:
err = true;
break;
}
if (err) {
break;
} else {
result++;
}
} else if (*format++ != *next++) {
// match input
break;
}
}
va_end(ap);
return result;
}
#if defined(TEST)
int main(int argc, char *pArgv[]) {
int x,y,xx,yy,h;
char buffer[100];
unsigned u;
char c;
strcpy(buffer, "hello");
char *b = buffer;
if (simple_sscanf("BBX 00009 -1 +10 000",
"BBX %d %d %d %d",
&x, &y, &xx, &yy) != 4) {
printf("Failed\n");
} else {
printf("Success %d %d %d %d\n", x, y, xx, yy);
}
if (simple_sscanf("CAT 123x-10 0x100h 123456.AUD $ ",
"CAT %dx%d %xh %06u.AUD %c",
&x, &y, &h, &u, &c) != 5) {
printf("Failed\n");
} else {
printf("Success %d %d %d %d '%c' \n", x, y, h, u, c);
}
if (simple_sscanf("COPYRIGHT \"Copyright (c) 1984, 1987 Foo Systems Incorporated",
"COPYRIGHT \"%[^\"]",
b) != 1) {
printf("Failed\n");
} else {
printf("Success %s\n", buffer);
}
return 0;
}
#endif
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