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AK: Implement printf fraction length specification for strings

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This adds support for '%.20s' and friends :^)
This commit is contained in:
AnotherTest 2021-02-02 00:23:03 +03:30 • committed by Linus Groh
parent 9f970c3459
commit ba6c9423b8
1 changed files with 11 additions and 4 deletions
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15
AK/PrintfImplementation.h
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@ -233,10 +233,17 @@ ALWAYS_INLINE int print_octal_number(PutChFunc putch, char*& bufptr, u32 number,
} }
template<typename PutChFunc> template<typename PutChFunc>
ALWAYS_INLINE int print_string(PutChFunc putch, char*& bufptr, const char* str, size_t len, bool left_pad, size_t field_width, bool dot) ALWAYS_INLINE int print_string(PutChFunc putch, char*& bufptr, const char* str, size_t len, bool left_pad, size_t field_width, bool dot, size_t fraction_length, bool has_fraction)
{ {
if (has_fraction)
len = min(len, fraction_length);
if (!dot && (!field_width || field_width < len)) if (!dot && (!field_width || field_width < len))
field_width = len; field_width = len;
if (has_fraction && !field_width)
field_width = len;
size_t pad_amount = field_width > len ? field_width - len : 0; size_t pad_amount = field_width > len ? field_width - len : 0;
if (!left_pad) { if (!left_pad) {
@ -292,7 +299,7 @@ struct PrintfImpl {
const char* sp = NextArgument<const char*>()(ap); const char* sp = NextArgument<const char*>()(ap);
if (!sp) if (!sp)
sp = "(null)"; sp = "(null)";
return print_string(m_putch, m_bufptr, sp, strlen(sp), state.left_pad, state.field_width, state.dot); return print_string(m_putch, m_bufptr, sp, strlen(sp), state.left_pad, state.field_width, state.dot, state.fraction_length, state.has_fraction_length);
} }
ALWAYS_INLINE int format_d(const ModifierState& state, ArgumentListRefT ap) const ALWAYS_INLINE int format_d(const ModifierState& state, ArgumentListRefT ap) const
{ {
@ -367,7 +374,7 @@ struct PrintfImpl {
ALWAYS_INLINE int format_c(const ModifierState& state, ArgumentListRefT ap) const ALWAYS_INLINE int format_c(const ModifierState& state, ArgumentListRefT ap) const
{ {
char c = NextArgument<int>()(ap); char c = NextArgument<int>()(ap);
return print_string(m_putch, m_bufptr, &c, 1, state.left_pad, state.field_width, state.dot); return print_string(m_putch, m_bufptr, &c, 1, state.left_pad, state.field_width, state.dot, state.fraction_length, state.has_fraction_length);
} }
ALWAYS_INLINE int format_unrecognized(char format_op, const char* fmt, const ModifierState&, ArgumentListRefT) const ALWAYS_INLINE int format_unrecognized(char format_op, const char* fmt, const ModifierState&, ArgumentListRefT) const
{ {
@ -422,7 +429,7 @@ ALWAYS_INLINE int printf_internal(PutChFunc putch, char* buffer, const char*& fm
if (*(p + 1)) if (*(p + 1))
goto one_more; goto one_more;
} }
if (!state.zero_pad && !state.field_width && *p == '0') { if (!state.zero_pad && !state.field_width && !state.has_fraction_length && *p == '0') {
state.zero_pad = true; state.zero_pad = true;
if (*(p + 1)) if (*(p + 1))
goto one_more; goto one_more;