Enrico Fraccaroli
105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
/// @file vscanf.c
|
|
/// @brief Reading formatting routines.
|
|
/// @copyright (c) 2014-2021 This file is distributed under the MIT License.
|
|
/// See LICENSE.md for details.
|
|
|
|
#include "fs/vfs.h"
|
|
#include "ctype.h"
|
|
#include "string.h"
|
|
#include "io/debug.h"
|
|
#include "stdio.h"
|
|
|
|
static int vsscanf(const char *buf, const char *s, va_list ap)
|
|
{
|
|
int count = 0, noassign = 0, width = 0, base = 0;
|
|
const char *tc;
|
|
char tmp[BUFSIZ];
|
|
|
|
while (*s && *buf) {
|
|
while (isspace(*s))
|
|
++s;
|
|
if (*s == '%') {
|
|
++s;
|
|
for (; *s; ++s) {
|
|
if (strchr("dibouxcsefg%", *s))
|
|
break;
|
|
if (*s == '*')
|
|
noassign = 1;
|
|
else if (isdigit(*s)) {
|
|
for (tc = s; isdigit(*s); ++s)
|
|
;
|
|
strncpy(tmp, tc, s - tc);
|
|
tmp[s - tc] = '\0';
|
|
width = strtol(tmp, NULL, 10);
|
|
--s;
|
|
}
|
|
}
|
|
if (*s == 's') {
|
|
while (isspace(*buf))
|
|
++buf;
|
|
if (!width)
|
|
width = strcspn(buf, " \t\n\r\f\v");
|
|
if (!noassign) {
|
|
char *string = va_arg(ap, char *);
|
|
strncpy(string, buf, width);
|
|
string[width] = '\0';
|
|
}
|
|
buf += width;
|
|
} else if (*s == 'c') {
|
|
while (isspace(*buf))
|
|
++buf;
|
|
if (!width)
|
|
width = 1;
|
|
if (!noassign) {
|
|
strncpy(va_arg(ap, char *), buf, width);
|
|
}
|
|
buf += width;
|
|
} else if (strchr("duxob", *s)) {
|
|
while (isspace(*buf))
|
|
++buf;
|
|
if (*s == 'd' || *s == 'u')
|
|
base = 10;
|
|
else if (*s == 'x')
|
|
base = 16;
|
|
else if (*s == 'o')
|
|
base = 8;
|
|
else if (*s == 'b')
|
|
base = 2;
|
|
if (!width) {
|
|
if (isspace(*(s + 1)) || *(s + 1) == 0)
|
|
width = strcspn(buf, " \t\n\r\f\v");
|
|
else
|
|
width = strchr(buf, *(s + 1)) - buf;
|
|
}
|
|
strncpy(tmp, buf, width);
|
|
tmp[width] = '\0';
|
|
buf += width;
|
|
if (!noassign)
|
|
*va_arg(ap, unsigned int *) = strtol(tmp, NULL, base);
|
|
}
|
|
if (!noassign)
|
|
++count;
|
|
width = noassign = 0;
|
|
++s;
|
|
} else {
|
|
while (isspace(*buf))
|
|
++buf;
|
|
if (*s != *buf)
|
|
break;
|
|
else
|
|
++s, ++buf;
|
|
}
|
|
}
|
|
return (count);
|
|
}
|
|
|
|
int sscanf(const char *buf, const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
int count = vsscanf(buf, fmt, ap);
|
|
va_end(ap);
|
|
return count;
|
|
}
|