summaryrefslogtreecommitdiffstats
path: root/lib
diff options
context:
space:
mode:
Diffstat (limited to 'lib')
-rw-r--r--lib/vsprintf.c972
1 files changed, 541 insertions, 431 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 3543bbe..25f0157 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -396,7 +396,38 @@ static noinline char* put_dec(char *buf, unsigned long long num)
#define SMALL 32 /* Must be 32 == 0x20 */
#define SPECIAL 64 /* 0x */
-static char *number(char *buf, char *end, unsigned long long num, int base, int size, int precision, int type)
+enum format_type {
+ FORMAT_TYPE_NONE, /* Just a string part */
+ FORMAT_TYPE_WITDH,
+ FORMAT_TYPE_PRECISION,
+ FORMAT_TYPE_CHAR,
+ FORMAT_TYPE_STR,
+ FORMAT_TYPE_PTR,
+ FORMAT_TYPE_PERCENT_CHAR,
+ FORMAT_TYPE_INVALID,
+ FORMAT_TYPE_LONG_LONG,
+ FORMAT_TYPE_ULONG,
+ FORMAT_TYPE_LONG,
+ FORMAT_TYPE_USHORT,
+ FORMAT_TYPE_SHORT,
+ FORMAT_TYPE_UINT,
+ FORMAT_TYPE_INT,
+ FORMAT_TYPE_NRCHARS,
+ FORMAT_TYPE_SIZE_T,
+ FORMAT_TYPE_PTRDIFF
+};
+
+struct printf_spec {
+ enum format_type type;
+ int flags; /* flags to number() */
+ int field_width; /* width of output field */
+ int base;
+ int precision; /* # of digits/chars */
+ int qualifier;
+};
+
+static char *number(char *buf, char *end, unsigned long long num,
+ struct printf_spec spec)
{
/* we are called with base 8, 10 or 16, only, thus don't need "G..." */
static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */
@@ -404,32 +435,32 @@ static char *number(char *buf, char *end, unsigned long long num, int base, int
char tmp[66];
char sign;
char locase;
- int need_pfx = ((type & SPECIAL) && base != 10);
+ int need_pfx = ((spec.flags & SPECIAL) && spec.base != 10);
int i;
/* locase = 0 or 0x20. ORing digits or letters with 'locase'
* produces same digits or (maybe lowercased) letters */
- locase = (type & SMALL);
- if (type & LEFT)
- type &= ~ZEROPAD;
+ locase = (spec.flags & SMALL);
+ if (spec.flags & LEFT)
+ spec.flags &= ~ZEROPAD;
sign = 0;
- if (type & SIGN) {
+ if (spec.flags & SIGN) {
if ((signed long long) num < 0) {
sign = '-';
num = - (signed long long) num;
- size--;
- } else if (type & PLUS) {
+ spec.field_width--;
+ } else if (spec.flags & PLUS) {
sign = '+';
- size--;
- } else if (type & SPACE) {
+ spec.field_width--;
+ } else if (spec.flags & SPACE) {
sign = ' ';
- size--;
+ spec.field_width--;
}
}
if (need_pfx) {
- size--;
- if (base == 16)
- size--;
+ spec.field_width--;
+ if (spec.base == 16)
+ spec.field_width--;
}
/* generate full string in tmp[], in reverse order */
@@ -441,10 +472,10 @@ static char *number(char *buf, char *end, unsigned long long num, int base, int
tmp[i++] = (digits[do_div(num,base)] | locase);
} while (num != 0);
*/
- else if (base != 10) { /* 8 or 16 */
- int mask = base - 1;
+ else if (spec.base != 10) { /* 8 or 16 */
+ int mask = spec.base - 1;
int shift = 3;
- if (base == 16) shift = 4;
+ if (spec.base == 16) shift = 4;
do {
tmp[i++] = (digits[((unsigned char)num) & mask] | locase);
num >>= shift;
@@ -454,12 +485,12 @@ static char *number(char *buf, char *end, unsigned long long num, int base, int
}
/* printing 100 using %2d gives "100", not "00" */
- if (i > precision)
- precision = i;
+ if (i > spec.precision)
+ spec.precision = i;
/* leading space padding */
- size -= precision;
- if (!(type & (ZEROPAD+LEFT))) {
- while(--size >= 0) {
+ spec.field_width -= spec.precision;
+ if (!(spec.flags & (ZEROPAD+LEFT))) {
+ while(--spec.field_width >= 0) {
if (buf < end)
*buf = ' ';
++buf;
@@ -476,23 +507,23 @@ static char *number(char *buf, char *end, unsigned long long num, int base, int
if (buf < end)
*buf = '0';
++buf;
- if (base == 16) {
+ if (spec.base == 16) {
if (buf < end)
*buf = ('X' | locase);
++buf;
}
}
/* zero or space padding */
- if (!(type & LEFT)) {
- char c = (type & ZEROPAD) ? '0' : ' ';
- while (--size >= 0) {
+ if (!(spec.flags & LEFT)) {
+ char c = (spec.flags & ZEROPAD) ? '0' : ' ';
+ while (--spec.field_width >= 0) {
if (buf < end)
*buf = c;
++buf;
}
}
/* hmm even more zero padding? */
- while (i <= --precision) {
+ while (i <= --spec.precision) {
if (buf < end)
*buf = '0';
++buf;
@@ -504,7 +535,7 @@ static char *number(char *buf, char *end, unsigned long long num, int base, int
++buf;
}
/* trailing space padding */
- while (--size >= 0) {
+ while (--spec.field_width >= 0) {
if (buf < end)
*buf = ' ';
++buf;
@@ -512,17 +543,17 @@ static char *number(char *buf, char *end, unsigned long long num, int base, int
return buf;
}
-static char *string(char *buf, char *end, char *s, int field_width, int precision, int flags)
+static char *string(char *buf, char *end, char *s, struct printf_spec spec)
{
int len, i;
if ((unsigned long)s < PAGE_SIZE)
s = "<NULL>";
- len = strnlen(s, precision);
+ len = strnlen(s, spec.precision);
- if (!(flags & LEFT)) {
- while (len < field_width--) {
+ if (!(spec.flags & LEFT)) {
+ while (len < spec.field_width--) {
if (buf < end)
*buf = ' ';
++buf;
@@ -533,7 +564,7 @@ static char *string(char *buf, char *end, char *s, int field_width, int precisio
*buf = *s;
++buf; ++s;
}
- while (len < field_width--) {
+ while (len < spec.field_width--) {
if (buf < end)
*buf = ' ';
++buf;
@@ -541,21 +572,24 @@ static char *string(char *buf, char *end, char *s, int field_width, int precisio
return buf;
}
-static char *symbol_string(char *buf, char *end, void *ptr, int field_width, int precision, int flags)
+static char *symbol_string(char *buf, char *end, void *ptr,
+ struct printf_spec spec)
{
unsigned long value = (unsigned long) ptr;
#ifdef CONFIG_KALLSYMS
char sym[KSYM_SYMBOL_LEN];
sprint_symbol(sym, value);
- return string(buf, end, sym, field_width, precision, flags);
+ return string(buf, end, sym, spec);
#else
- field_width = 2*sizeof(void *);
- flags |= SPECIAL | SMALL | ZEROPAD;
- return number(buf, end, value, 16, field_width, precision, flags);
+ spec.field_width = 2*sizeof(void *);
+ spec.flags |= SPECIAL | SMALL | ZEROPAD;
+ spec.base = 16;
+ return number(buf, end, value, spec);
#endif
}
-static char *resource_string(char *buf, char *end, struct resource *res, int field_width, int precision, int flags)
+static char *resource_string(char *buf, char *end, struct resource *res,
+ struct printf_spec spec)
{
#ifndef IO_RSRC_PRINTK_SIZE
#define IO_RSRC_PRINTK_SIZE 4
@@ -564,7 +598,11 @@ static char *resource_string(char *buf, char *end, struct resource *res, int fie
#ifndef MEM_RSRC_PRINTK_SIZE
#define MEM_RSRC_PRINTK_SIZE 8
#endif
-
+ struct printf_spec num_spec = {
+ .base = 16,
+ .precision = -1,
+ .flags = SPECIAL | SMALL | ZEROPAD,
+ };
/* room for the actual numbers, the two "0x", -, [, ] and the final zero */
char sym[4*sizeof(resource_size_t) + 8];
char *p = sym, *pend = sym + sizeof(sym);
@@ -576,17 +614,18 @@ static char *resource_string(char *buf, char *end, struct resource *res, int fie
size = MEM_RSRC_PRINTK_SIZE;
*p++ = '[';
- p = number(p, pend, res->start, 16, size, -1, SPECIAL | SMALL | ZEROPAD);
+ num_spec.field_width = size;
+ p = number(p, pend, res->start, num_spec);
*p++ = '-';
- p = number(p, pend, res->end, 16, size, -1, SPECIAL | SMALL | ZEROPAD);
+ p = number(p, pend, res->end, num_spec);
*p++ = ']';
*p = 0;
- return string(buf, end, sym, field_width, precision, flags);
+ return string(buf, end, sym, spec);
}
-static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width,
- int precision, int flags)
+static char *mac_address_string(char *buf, char *end, u8 *addr,
+ struct printf_spec spec)
{
char mac_addr[6 * 3]; /* (6 * 2 hex digits), 5 colons and trailing zero */
char *p = mac_addr;
@@ -594,16 +633,17 @@ static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width,
for (i = 0; i < 6; i++) {
p = pack_hex_byte(p, addr[i]);
- if (!(flags & SPECIAL) && i != 5)
+ if (!(spec.flags & SPECIAL) && i != 5)
*p++ = ':';
}
*p = '\0';
+ spec.flags &= ~SPECIAL;
- return string(buf, end, mac_addr, field_width, precision, flags & ~SPECIAL);
+ return string(buf, end, mac_addr, spec);
}
-static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width,
- int precision, int flags)
+static char *ip6_addr_string(char *buf, char *end, u8 *addr,
+ struct printf_spec spec)
{
char ip6_addr[8 * 5]; /* (8 * 4 hex digits), 7 colons and trailing zero */
char *p = ip6_addr;
@@ -612,16 +652,17 @@ static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width,
for (i = 0; i < 8; i++) {
p = pack_hex_byte(p, addr[2 * i]);
p = pack_hex_byte(p, addr[2 * i + 1]);
- if (!(flags & SPECIAL) && i != 7)
+ if (!(spec.flags & SPECIAL) && i != 7)
*p++ = ':';
}
*p = '\0';
+ spec.flags &= ~SPECIAL;
- return string(buf, end, ip6_addr, field_width, precision, flags & ~SPECIAL);
+ return string(buf, end, ip6_addr, spec);
}
-static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width,
- int precision, int flags)
+static char *ip4_addr_string(char *buf, char *end, u8 *addr,
+ struct printf_spec spec)
{
char ip4_addr[4 * 4]; /* (4 * 3 decimal digits), 3 dots and trailing zero */
char temp[3]; /* hold each IP quad in reverse order */
@@ -637,8 +678,9 @@ static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width,
*p++ = '.';
}
*p = '\0';
+ spec.flags &= ~SPECIAL;
- return string(buf, end, ip4_addr, field_width, precision, flags & ~SPECIAL);
+ return string(buf, end, ip4_addr, spec);
}
/*
@@ -663,41 +705,234 @@ static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width,
* function pointers are really function descriptors, which contain a
* pointer to the real address.
*/
-static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field_width, int precision, int flags)
+static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
+ struct printf_spec spec)
{
if (!ptr)
- return string(buf, end, "(null)", field_width, precision, flags);
+ return string(buf, end, "(null)", spec);
switch (*fmt) {
case 'F':
ptr = dereference_function_descriptor(ptr);
/* Fallthrough */
case 'S':
- return symbol_string(buf, end, ptr, field_width, precision, flags);
+ return symbol_string(buf, end, ptr, spec);
case 'R':
- return resource_string(buf, end, ptr, field_width, precision, flags);
+ return resource_string(buf, end, ptr, spec);
case 'm':
- flags |= SPECIAL;
+ spec.flags |= SPECIAL;
/* Fallthrough */
case 'M':
- return mac_address_string(buf, end, ptr, field_width, precision, flags);
+ return mac_address_string(buf, end, ptr, spec);
case 'i':
- flags |= SPECIAL;
+ spec.flags |= SPECIAL;
/* Fallthrough */
case 'I':
if (fmt[1] == '6')
- return ip6_addr_string(buf, end, ptr, field_width, precision, flags);
+ return ip6_addr_string(buf, end, ptr, spec);
if (fmt[1] == '4')
- return ip4_addr_string(buf, end, ptr, field_width, precision, flags);
- flags &= ~SPECIAL;
+ return ip4_addr_string(buf, end, ptr, spec);
+ spec.flags &= ~SPECIAL;
+ break;
+ }
+ spec.flags |= SMALL;
+ if (spec.field_width == -1) {
+ spec.field_width = 2*sizeof(void *);
+ spec.flags |= ZEROPAD;
+ }
+ spec.base = 16;
+
+ return number(buf, end, (unsigned long) ptr, spec);
+}
+
+/*
+ * Helper function to decode printf style format.
+ * Each call decode a token from the format and return the
+ * number of characters read (or likely the delta where it wants
+ * to go on the next call).
+ * The decoded token is returned through the parameters
+ *
+ * 'h', 'l', or 'L' for integer fields
+ * 'z' support added 23/7/1999 S.H.
+ * 'z' changed to 'Z' --davidm 1/25/99
+ * 't' added for ptrdiff_t
+ *
+ * @fmt: the format string
+ * @type of the token returned
+ * @flags: various flags such as +, -, # tokens..
+ * @field_width: overwritten width
+ * @base: base of the number (octal, hex, ...)
+ * @precision: precision of a number
+ * @qualifier: qualifier of a number (long, size_t, ...)
+ */
+static int format_decode(const char *fmt, struct printf_spec *spec)
+{
+ const char *start = fmt;
+ bool sign = false;
+
+ /* we finished early by reading the field width */
+ if (spec->type == FORMAT_TYPE_WITDH) {
+ if (spec->field_width < 0) {
+ spec->field_width = -spec->field_width;
+ spec->flags |= LEFT;
+ }
+ spec->type = FORMAT_TYPE_NONE;
+ goto precision;
+ }
+
+ /* we finished early by reading the precision */
+ if (spec->type == FORMAT_TYPE_PRECISION) {
+ if (spec->precision < 0)
+ spec->precision = 0;
+
+ spec->type = FORMAT_TYPE_NONE;
+ goto qualifier;
+ }
+
+ /* By default */
+ spec->type = FORMAT_TYPE_NONE;
+
+ for (; *fmt ; ++fmt) {
+ if (*fmt == '%')
+ break;
+ }
+
+ /* Return the current non-format string */
+ if (fmt != start || !*fmt)
+ return fmt - start;
+
+ /* Process flags */
+ spec->flags = 0;
+
+ while (1) { /* this also skips first '%' */
+ bool found = true;
+
+ ++fmt;
+
+ switch (*fmt) {
+ case '-': spec->flags |= LEFT; break;
+ case '+': spec->flags |= PLUS; break;
+ case ' ': spec->flags |= SPACE; break;
+ case '#': spec->flags |= SPECIAL; break;
+ case '0': spec->flags |= ZEROPAD; break;
+ default: found = false;
+ }
+
+ if (!found)
+ break;
+ }
+
+ /* get field width */
+ spec->field_width = -1;
+
+ if (isdigit(*fmt))
+ spec->field_width = skip_atoi(&fmt);
+ else if (*fmt == '*') {
+ /* it's the next argument */
+ spec->type = FORMAT_TYPE_WITDH;
+ return ++fmt - start;
+ }
+
+precision:
+ /* get the precision */
+ spec->precision = -1;
+ if (*fmt == '.') {
+ ++fmt;
+ if (isdigit(*fmt)) {
+ spec->precision = skip_atoi(&fmt);
+ if (spec->precision < 0)
+ spec->precision = 0;
+ } else if (*fmt == '*') {
+ /* it's the next argument */
+ spec->type = FORMAT_TYPE_WITDH;
+ return ++fmt - start;
+ }
+ }
+
+qualifier:
+ /* get the conversion qualifier */
+ spec->qualifier = -1;
+ if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
+ *fmt == 'Z' || *fmt == 'z' || *fmt == 't') {
+ spec->qualifier = *fmt;
+ ++fmt;
+ if (spec->qualifier == 'l' && *fmt == 'l') {
+ spec->qualifier = 'L';
+ ++fmt;
+ }
+ }
+
+ /* default base */
+ spec->base = 10;
+ switch (*fmt) {
+ case 'c':
+ spec->type = FORMAT_TYPE_CHAR;
+ return ++fmt - start;
+
+ case 's':
+ spec->type = FORMAT_TYPE_STR;
+ return ++fmt - start;
+
+ case 'p':
+ spec->type = FORMAT_TYPE_PTR;
+ return fmt - start;
+ /* skip alnum */
+
+ case 'n':
+ spec->type = FORMAT_TYPE_NRCHARS;
+ return ++fmt - start;
+
+ case '%':
+ spec->type = FORMAT_TYPE_PERCENT_CHAR;
+ return ++fmt - start;
+
+ /* integer number formats - set up the flags and "break" */
+ case 'o':
+ spec->base = 8;
break;
+
+ case 'x':
+ spec->flags |= SMALL;
+
+ case 'X':
+ spec->base = 16;
+ break;
+
+ case 'd':
+ case 'i':
+ sign = true;
+ case 'u':
+ break;
+
+ default:
+ spec->type = FORMAT_TYPE_INVALID;
+ return fmt - start;
}
- flags |= SMALL;
- if (field_width == -1) {
- field_width = 2*sizeof(void *);
- flags |= ZEROPAD;
+
+ if (spec->qualifier == 'L')
+ spec->type = FORMAT_TYPE_LONG_LONG;
+ else if (spec->qualifier == 'l') {
+ if (sign)
+ spec->type = FORMAT_TYPE_LONG;
+ else
+ spec->type = FORMAT_TYPE_ULONG;
+ } else if (spec->qualifier == 'Z' || spec->qualifier == 'z') {
+ spec->type = FORMAT_TYPE_SIZE_T;
+ } else if (spec->qualifier == 't') {
+ spec->type = FORMAT_TYPE_PTRDIFF;
+ } else if (spec->qualifier == 'h') {
+ if (sign)
+ spec->type = FORMAT_TYPE_SHORT;
+ else
+ spec->type = FORMAT_TYPE_USHORT;
+ } else {
+ if (sign)
+ spec->type = FORMAT_TYPE_INT;
+ else
+ spec->type = FORMAT_TYPE_UINT;
}
- return number(buf, end, (unsigned long) ptr, 16, field_width, precision, flags);
+
+ return ++fmt - start;
}
/**
@@ -726,18 +961,9 @@ static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field
int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
{
unsigned long long num;
- int base;
char *str, *end, c;
-
- int flags; /* flags to number() */
-
- int field_width; /* width of output field */
- int precision; /* min. # of digits for integers; max
- number of chars for from string */
- int qualifier; /* 'h', 'l', or 'L' for integer fields */
- /* 'z' support added 23/7/1999 S.H. */
- /* 'z' changed to 'Z' --davidm 1/25/99 */
- /* 't' added for ptrdiff_t */
+ int read;
+ struct printf_spec spec = {0};
/* Reject out-of-range values early. Large positive sizes are
used for unknown buffer sizes. */
@@ -758,184 +984,144 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
size = end - buf;
}
- for (; *fmt ; ++fmt) {
- if (*fmt != '%') {
- if (str < end)
- *str = *fmt;
- ++str;
- continue;
- }
+ while (*fmt) {
+ const char *old_fmt = fmt;
- /* process flags */
- flags = 0;
- repeat:
- ++fmt; /* this also skips first '%' */
- switch (*fmt) {
- case '-': flags |= LEFT; goto repeat;
- case '+': flags |= PLUS; goto repeat;
- case ' ': flags |= SPACE; goto repeat;
- case '#': flags |= SPECIAL; goto repeat;
- case '0': flags |= ZEROPAD; goto repeat;
- }
+ read = format_decode(fmt, &spec);
- /* get field width */
- field_width = -1;
- if (isdigit(*fmt))
- field_width = skip_atoi(&fmt);
- else if (*fmt == '*') {
- ++fmt;
- /* it's the next argument */
- field_width = va_arg(args, int);
- if (field_width < 0) {
- field_width = -field_width;
- flags |= LEFT;
- }
- }
+ fmt += read;
- /* get the precision */
- precision = -1;
- if (*fmt == '.') {
- ++fmt;
- if (isdigit(*fmt))
- precision = skip_atoi(&fmt);
- else if (*fmt == '*') {
- ++fmt;
- /* it's the next argument */
- precision = va_arg(args, int);
+ switch (spec.type) {
+ case FORMAT_TYPE_NONE: {
+ int copy = read;
+ if (str < end) {
+ if (copy > end - str)
+ copy = end - str;
+ memcpy(str, old_fmt, copy);
}
- if (precision < 0)
- precision = 0;
+ str += read;
+ break;
}
- /* get the conversion qualifier */
- qualifier = -1;
- if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
- *fmt =='Z' || *fmt == 'z' || *fmt == 't') {
- qualifier = *fmt;
- ++fmt;
- if (qualifier == 'l' && *fmt == 'l') {
- qualifier = 'L';
- ++fmt;
- }
- }
+ case FORMAT_TYPE_WITDH:
+ spec.field_width = va_arg(args, int);
+ break;
- /* default base */
- base = 10;
+ case FORMAT_TYPE_PRECISION:
+ spec.precision = va_arg(args, int);
+ break;
- switch (*fmt) {
- case 'c':
- if (!(flags & LEFT)) {
- while (--field_width > 0) {
- if (str < end)
- *str = ' ';
- ++str;
- }
- }
- c = (unsigned char) va_arg(args, int);
- if (str < end)
- *str = c;
- ++str;
- while (--field_width > 0) {
+ case FORMAT_TYPE_CHAR:
+ if (!(spec.flags & LEFT)) {
+ while (--spec.field_width > 0) {
if (str < end)
*str = ' ';
++str;
- }
- continue;
-
- case 's':
- str = string(str, end, va_arg(args, char *), field_width, precision, flags);
- continue;
-
- case 'p':
- str = pointer(fmt+1, str, end,
- va_arg(args, void *),
- field_width, precision, flags);
- /* Skip all alphanumeric pointer suffixes */
- while (isalnum(fmt[1]))
- fmt++;
- continue;
-
- case 'n':
- /* FIXME:
- * What does C99 say about the overflow case here? */
- if (qualifier == 'l') {
- long * ip = va_arg(args, long *);
- *ip = (str - buf);
- } else if (qualifier == 'Z' || qualifier == 'z') {
- size_t * ip = va_arg(args, size_t *);
- *ip = (str - buf);
- } else {
- int * ip = va_arg(args, int *);
- *ip = (str - buf);
- }
- continue;
- case '%':
+ }
+ }
+ c = (unsigned char) va_arg(args, int);
+ if (str < end)
+ *str = c;
+ ++str;
+ while (--spec.field_width > 0) {
if (str < end)
- *str = '%';
+ *str = ' ';
++str;
- continue;
+ }
+ break;
- /* integer number formats - set up the flags and "break" */
- case 'o':
- base = 8;
- break;
+ case FORMAT_TYPE_STR:
+ str = string(str, end, va_arg(args, char *), spec);
+ break;
- case 'x':
- flags |= SMALL;
- case 'X':
- base = 16;
- break;
+ case FORMAT_TYPE_PTR:
+ str = pointer(fmt+1, str, end, va_arg(args, void *),
+ spec);
+ while (isalnum(*fmt))
+ fmt++;
+ break;
- case 'd':
- case 'i':
- flags |= SIGN;
- case 'u':
- break;
+ case FORMAT_TYPE_PERCENT_CHAR:
+ if (str < end)
+ *str = '%';
+ ++str;
+ break;
- default:
+ case FORMAT_TYPE_INVALID:
+ if (str < end)
+ *str = '%';
+ ++str;
+ if (*fmt) {
if (str < end)
- *str = '%';
+ *str = *fmt;
++str;
- if (*fmt) {
- if (str < end)
- *str = *fmt;
- ++str;
- } else {
- --fmt;
- }
- continue;
+ } else {
+ --fmt;
+ }
+ break;
+
+ case FORMAT_TYPE_NRCHARS: {
+ int qualifier = spec.qualifier;
+
+ if (qualifier == 'l') {
+ long *ip = va_arg(args, long *);
+ *ip = (str - buf);
+ } else if (qualifier == 'Z' ||
+ qualifier == 'z') {
+ size_t *ip = va_arg(args, size_t *);
+ *ip = (str - buf);
+ } else {
+ int *ip = va_arg(args, int *);
+ *ip = (str - buf);
+ }
+ break;
}
- if (qualifier == 'L')
- num = va_arg(args, long long);
- else if (qualifier == 'l') {
- num = va_arg(args, unsigned long);
- if (flags & SIGN)
- num = (signed long) num;
- } else if (qualifier == 'Z' || qualifier == 'z') {
- num = va_arg(args, size_t);
- } else if (qualifier == 't') {
- num = va_arg(args, ptrdiff_t);
- } else if (qualifier == 'h') {
- num = (unsigned short) va_arg(args, int);
- if (flags & SIGN)
- num = (signed short) num;
- } else {
- num = va_arg(args, unsigned int);
- if (flags & SIGN)
- num = (signed int) num;
+
+ default:
+ switch (spec.type) {
+ case FORMAT_TYPE_LONG_LONG:
+ num = va_arg(args, long long);
+ break;
+ case FORMAT_TYPE_ULONG:
+ num = va_arg(args, unsigned long);
+ break;
+ case FORMAT_TYPE_LONG:
+ num = va_arg(args, long);
+ break;
+ case FORMAT_TYPE_SIZE_T:
+ num = va_arg(args, size_t);
+ break;
+ case FORMAT_TYPE_PTRDIFF:
+ num = va_arg(args, ptrdiff_t);
+ break;
+ case FORMAT_TYPE_USHORT:
+ num = (unsigned short) va_arg(args, int);
+ break;
+ case FORMAT_TYPE_SHORT:
+ num = (short) va_arg(args, int);
+ break;
+ case FORMAT_TYPE_UINT:
+ num = va_arg(args, unsigned int);
+ break;
+ default:
+ num = va_arg(args, unsigned int);
+ }
+
+ str = number(str, end, num, spec);
}
- str = number(str, end, num, base,
- field_width, precision, flags);
}
+
if (size > 0) {
if (str < end)
*str = '\0';
else
end[-1] = '\0';
}
+
/* the trailing null byte doesn't count towards the total */
return str-buf;
+
}
EXPORT_SYMBOL(vsnprintf);
@@ -1084,8 +1270,9 @@ EXPORT_SYMBOL(sprintf);
*/
int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args)
{
+ struct printf_spec spec = {0};
char *str, *end;
- int qualifier;
+ int read;
str = (char *)bin_buf;
end = (char *)(bin_buf + size);
@@ -1110,57 +1297,26 @@ do { \
str += sizeof(type); \
} while (0)
- for (; *fmt ; ++fmt) {
- if (*fmt != '%')
- continue;
-repeat:
- /* parse flags */
- ++fmt; /* this also skips first '%' */
- if (*fmt == '-' || *fmt == '+' || *fmt == ' '
- || *fmt == '#' || *fmt == '0')
- goto repeat;
+ while (*fmt) {
+ read = format_decode(fmt, &spec);
- /* parse field width */
- if (isdigit(*fmt))
- skip_atoi(&fmt);
- else if (*fmt == '*') {
- ++fmt;
- /* it's the next argument */
- save_arg(int);
- }
+ fmt += read;
- /* parse the precision */
- if (*fmt == '.') {
- ++fmt;
- if (isdigit(*fmt))
- skip_atoi(&fmt);
- else if (*fmt == '*') {
- ++fmt;
- /* it's the next argument */
- save_arg(int);
- }
- }
+ switch (spec.type) {
+ case FORMAT_TYPE_NONE:
+ break;
- /* parse the conversion qualifier */
- qualifier = -1;
- if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
- *fmt == 'Z' || *fmt == 'z' || *fmt == 't') {
- qualifier = *fmt;
- ++fmt;
- if (qualifier == 'l' && *fmt == 'l') {
- qualifier = 'L';
- ++fmt;
- }
- }
+ case FORMAT_TYPE_WITDH:
+ case FORMAT_TYPE_PRECISION:
+ save_arg(int);
+ break;
- /* parse format type */
- switch (*fmt) {
- case 'c':
+ case FORMAT_TYPE_CHAR:
save_arg(char);
- continue;
- case 's': {
- /* save the string argument */
+ break;
+
+ case FORMAT_TYPE_STR: {
const char *save_str = va_arg(args, char *);
size_t len;
if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE
@@ -1170,16 +1326,27 @@ repeat:
if (str + len + 1 < end)
memcpy(str, save_str, len + 1);
str += len + 1;
- continue;
+ break;
}
- case 'p':
+
+ case FORMAT_TYPE_PTR:
save_arg(void *);
/* skip all alphanumeric pointer suffixes */
- while (isalnum(fmt[1]))
+ while (isalnum(*fmt))
fmt++;
- continue;
- case 'n': {
+ break;
+
+ case FORMAT_TYPE_PERCENT_CHAR:
+ break;
+
+ case FORMAT_TYPE_INVALID:
+ if (!*fmt)
+ --fmt;
+ break;
+
+ case FORMAT_TYPE_NRCHARS: {
/* skip %n 's argument */
+ int qualifier = spec.qualifier;
void *skip_arg;
if (qualifier == 'l')
skip_arg = va_arg(args, long *);
@@ -1187,37 +1354,37 @@ repeat:
skip_arg = va_arg(args, size_t *);
else
skip_arg = va_arg(args, int *);
- continue;
+ break;
}
- case 'o':
- case 'x':
- case 'X':
- case 'd':
- case 'i':
- case 'u':
- /* save arg for case: 'o', 'x', 'X', 'd', 'i', 'u' */
- if (qualifier == 'L')
+
+ default:
+ switch (spec.type) {
+
+ case FORMAT_TYPE_LONG_LONG:
save_arg(long long);
- else if (qualifier == 'l')
+ break;
+ case FORMAT_TYPE_ULONG:
+ case FORMAT_TYPE_LONG:
save_arg(unsigned long);
- else if (qualifier == 'Z' || qualifier == 'z')
+ break;
+ case FORMAT_TYPE_SIZE_T:
save_arg(size_t);
- else if (qualifier == 't')
+ break;
+ case FORMAT_TYPE_PTRDIFF:
save_arg(ptrdiff_t);
- else if (qualifier == 'h')
+ break;
+ case FORMAT_TYPE_USHORT:
+ case FORMAT_TYPE_SHORT:
save_arg(short);
- else
+ break;
+ default:
save_arg(int);
- continue;
- default:
- if (!*fmt)
- --fmt;
- continue;
+ }
}
}
-#undef save_arg
-
return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf;
+
+#undef save_arg
}
EXPORT_SYMBOL_GPL(vbin_printf);
@@ -1249,14 +1416,10 @@ EXPORT_SYMBOL_GPL(vbin_printf);
int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
{
unsigned long long num;
- int base;
char *str, *end, c;
const char *args = (const char *)bin_buf;
- int flags;
- int field_width;
- int precision;
- int qualifier;
+ struct printf_spec spec = {0};
if (unlikely((int) size < 0)) {
/* There can be only one.. */
@@ -1290,84 +1453,37 @@ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
size = end - buf;
}
- for (; *fmt ; ++fmt) {
- if (*fmt != '%') {
- if (str < end)
- *str = *fmt;
- ++str;
- continue;
- }
+ while (*fmt) {
+ int read;
+ const char *old_fmt = fmt;
- /* process flags */
- flags = 0;
-repeat:
- ++fmt; /* this also skips first '%' */
- switch (*fmt) {
- case '-':
- flags |= LEFT;
- goto repeat;
- case '+':
- flags |= PLUS;
- goto repeat;
- case ' ':
- flags |= SPACE;
- goto repeat;
- case '#':
- flags |= SPECIAL;
- goto repeat;
- case '0':
- flags |= ZEROPAD;
- goto repeat;
- }
+ read = format_decode(fmt, &spec);
- /* get field width */
- field_width = -1;
- if (isdigit(*fmt))
- field_width = skip_atoi(&fmt);
- else if (*fmt == '*') {
- ++fmt;
- /* it's the next argument */
- field_width = get_arg(int);
- if (field_width < 0) {
- field_width = -field_width;
- flags |= LEFT;
- }
- }
+ fmt += read;
- /* get the precision */
- precision = -1;
- if (*fmt == '.') {
- ++fmt;
- if (isdigit(*fmt))
- precision = skip_atoi(&fmt);
- else if (*fmt == '*') {
- ++fmt;
- /* it's the next argument */
- precision = get_arg(int);
+ switch (spec.type) {
+ case FORMAT_TYPE_NONE: {
+ int copy = read;
+ if (str < end) {
+ if (copy > end - str)
+ copy = end - str;
+ memcpy(str, old_fmt, copy);
}
- if (precision < 0)
- precision = 0;
+ str += read;
+ break;
}
- /* get the conversion qualifier */
- qualifier = -1;
- if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
- *fmt == 'Z' || *fmt == 'z' || *fmt == 't') {
- qualifier = *fmt;
- ++fmt;
- if (qualifier == 'l' && *fmt == 'l') {
- qualifier = 'L';
- ++fmt;
- }
- }
+ case FORMAT_TYPE_WITDH:
+ spec.field_width = get_arg(int);
+ break;
- /* default base */
- base = 10;
+ case FORMAT_TYPE_PRECISION:
+ spec.precision = get_arg(int);
+ break;
- switch (*fmt) {
- case 'c':
- if (!(flags & LEFT)) {
- while (--field_width > 0) {
+ case FORMAT_TYPE_CHAR:
+ if (!(spec.flags & LEFT)) {
+ while (--spec.field_width > 0) {
if (str < end)
*str = ' ';
++str;
@@ -1377,58 +1493,34 @@ repeat:
if (str < end)
*str = c;
++str;
- while (--field_width > 0) {
+ while (--spec.field_width > 0) {
if (str < end)
*str = ' ';
++str;
}
- continue;
+ break;
- case 's':{
+ case FORMAT_TYPE_STR: {
const char *str_arg = args;
size_t len = strlen(str_arg);
args += len + 1;
- str = string(str, end, (char *)str_arg, field_width,
- precision, flags);
- continue;
+ str = string(str, end, (char *)str_arg, spec);
+ break;
}
- case 'p':
- str = pointer(fmt+1, str, end, get_arg(void *),
- field_width, precision, flags);
- /* Skip all alphanumeric pointer suffixes */
- while (isalnum(fmt[1]))
+ case FORMAT_TYPE_PTR:
+ str = pointer(fmt+1, str, end, get_arg(void *), spec);
+ while (isalnum(*fmt))
fmt++;
- continue;
-
- case 'n':
- /* skip %n */
- continue;
+ break;
- case '%':
+ case FORMAT_TYPE_PERCENT_CHAR:
if (str < end)
*str = '%';
++str;
- continue;
-
- /* integer number formats - set up the flags and "break" */
- case 'o':
- base = 8;
- break;
-
- case 'x':
- flags |= SMALL;
- case 'X':
- base = 16;
break;
- case 'd':
- case 'i':
- flags |= SIGN;
- case 'u':
- break;
-
- default:
+ case FORMAT_TYPE_INVALID:
if (str < end)
*str = '%';
++str;
@@ -1439,36 +1531,54 @@ repeat:
} else {
--fmt;
}
- continue;
- }
- if (qualifier == 'L')
- num = get_arg(long long);
- else if (qualifier == 'l') {
- num = get_arg(unsigned long);
- if (flags & SIGN)
- num = (signed long) num;
- } else if (qualifier == 'Z' || qualifier == 'z') {
- num = get_arg(size_t);
- } else if (qualifier == 't') {
- num = get_arg(ptrdiff_t);
- } else if (qualifier == 'h') {
- num = (unsigned short) get_arg(short);
- if (flags & SIGN)
- num = (signed short) num;
- } else {
- num = get_arg(unsigned int);
- if (flags & SIGN)
- num = (signed int) num;
+ break;
+
+ case FORMAT_TYPE_NRCHARS:
+ /* skip */
+ break;
+
+ default:
+ switch (spec.type) {
+
+ case FORMAT_TYPE_LONG_LONG:
+ num = get_arg(long long);
+ break;
+ case FORMAT_TYPE_ULONG:
+ num = get_arg(unsigned long);
+ break;
+ case FORMAT_TYPE_LONG:
+ num = get_arg(unsigned long);
+ break;
+ case FORMAT_TYPE_SIZE_T:
+ num = get_arg(size_t);
+ break;
+ case FORMAT_TYPE_PTRDIFF:
+ num = get_arg(ptrdiff_t);
+ break;
+ case FORMAT_TYPE_USHORT:
+ num = get_arg(unsigned short);
+ break;
+ case FORMAT_TYPE_SHORT:
+ num = get_arg(short);
+ break;
+ case FORMAT_TYPE_UINT:
+ num = get_arg(unsigned int);
+ break;
+ default:
+ num = get_arg(int);
+ }
+
+ str = number(str, end, num, spec);
}
- str = number(str, end, num, base,
- field_width, precision, flags);
}
+
if (size > 0) {
if (str < end)
*str = '\0';
else
end[-1] = '\0';
}
+
#undef get_arg
/* the trailing null byte doesn't count towards the total */
OpenPOWER on IntegriCloud