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reprint.c
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reprint.c
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/* reprint.c
* Copyright (c) 2013 David Bender. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* */
#define _GNU_SOURCE
#include <math.h>
#include <string.h>
#include <stdarg.h>
#include "reprint.h"
#include "arch_internal.h"
#ifdef NO_ASSERT
#define assert(x) do {if(!(x)) return -1;} while(0)
#else
#include <assert.h>
#endif
#include <math.h>
#include <stdlib.h>
#ifdef CONFIG_USE_ENDIAN_H
#define __USE_BSD
#include <endian.h>
#endif
/* These enums map selectors, flags, and register IDs to
* bit masks and such.*/
enum {
/* Data is tightly packed with no struct padding. */
FLAG_REG_TIGHT_PACK = IFLAG_RES_B7
/* Common formatted flags, registers */
,F_REG_FIELD_WIDTH = 0
,F_REG_PAD_CHAR = 1
,F_FLAG_RIGHT_ALIGN = FLAG_0
/* Common Formatted Quantity selectors, flags, registers */
,FQS_S_RADIX_DEFINED = FLAG_SELECTOR_1_DEFINED
,FQS_FLAG_EXPONENTIAL = FLAG_2
,FQS_REG_SHIFT = 3
,FQS_REG_SIGFIGS = 4
,FQS_REG_PRECISION = 5
/* The SHIFT value is only needed at specification time.
* Overwrite the value with the zero count at print time. */
,_FQW_REG_ZEROS = 3
/* The PRECISION value is only needed at specification time.
* Overwrite the value with the exponent value at print time. */
,_FQW_REG_EXP = 5
/* Writing out a number string is an alternation of 3 sequences
* 0 sequence
* S sequence (sig digits)
* 0 sequence
* There is a possible decimal point anywhere in the string.
* The break value indicates
* -when to switch sequences
* -or where to insert a decimal point.
*
* The MSB of the break register indicates if a break occurs
* in the S sequence.
* */
,_FQW_REG_BREAK = 6
,_FQW_REG_BREAK_FLAG_SIG = 0x80
,_FQW_REG_BREAK_MASK = 0x7F
,_FQW_REG_PRINT_LZ = FLAG_SELECTOR_RESERVED_4000
/* Rounding. */
,FQ_S_ROUND_DOWN_INF = FLAG_SELECTOR_0_DEFINED
,FQ_S_ROUND_UP_INF = FLAG_SELECTOR_0_DEFINED
| FLAG_SELECTOR_0_VAL_0
,FQ_S_ROUND_AWAY_ZERO = FLAG_SELECTOR_0_DEFINED
| FLAG_SELECTOR_0_VAL_1
,FQ_S_ROUND_TOWARD_ZERO = FLAG_SELECTOR_0_DEFINED
| FLAG_SELECTOR_0_VAL_0 | FLAG_SELECTOR_0_VAL_1
/* Format in decimal. */
,FQ_S_RADIX_10 = 0x0
/* Format in hexadecimal. */
,FQ_S_RADIX_16 = FLAG_SELECTOR_1_DEFINED
/* Format in octal. */
,FQ_S_RADIX_8 = FLAG_SELECTOR_1_DEFINED
| FLAG_SELECTOR_1_VAL_0
/* Format in binary. */
,FQ_S_RADIX_2 = FLAG_SELECTOR_1_DEFINED
| FLAG_SELECTOR_1_VAL_1
,_FQ_S_RADIX_MASK = FLAG_SELECTOR_1_DEFINED
| FLAG_SELECTOR_1_VAL_0
| FLAG_SELECTOR_1_VAL_1
,_FQ_S_PREFIX_DEFINED = FLAG_SELECTOR_2_DEFINED
/* Force display of sign '+' or '-' */
,FQ_S_PREFIX_FORCE_SIGN = FLAG_SELECTOR_2_VAL_0
/* Display prefix if not base10. */
,FQ_S_PREFIX_SHOW = FLAG_SELECTOR_2_VAL_1
,FQB_REG_BCOUNT = 2
,FQB_REG_BDROP = 3
/* Common formatted character */
,FTC_REG_REPEAT = 4
/* Common text (regardless of formatted)*/
,TS_REG_START = 3
,TS_REG_LENGTH = 4
/* Common formatted pointer */
,FMP_FLAG_BASE_2 = FLAG_2
/* Only print the ptr value.. */
,FMP_S_LOAD_PRINT_ONLY = 0x0
/* Print and load the data value. */
,FMP_S_LOAD_PRINT_DATA = FLAG_SELECTOR_1_DEFINED
/* Print and load the format value. */
,FMP_S_LOAD_PRINT_FMT = FLAG_SELECTOR_1_DEFINED
| FLAG_SELECTOR_1_VAL_0
/* Only load the data value. */
,FMP_S_LOAD_DATA = FLAG_SELECTOR_1_DEFINED
| FLAG_SELECTOR_1_VAL_1
/* Only load the format value. */
,FMP_S_LOAD_FMT = FLAG_SELECTOR_1_DEFINED
| FLAG_SELECTOR_1_VAL_0
| FLAG_SELECTOR_1_VAL_1
,FMP_S_LOAD_MASK = FLAG_SELECTOR_1_DEFINED
| FLAG_SELECTOR_1_VAL_0
| FLAG_SELECTOR_1_VAL_1
};
#define _FQ_FLAG_INTERNAL_HACK_MINUS_FLAG FLAG_SELECTOR_RESERVED_8000
static const uint16_t s_selector_bits[16] = {
FLAG_SELECTOR_0_DEFINED
,FLAG_SELECTOR_0_DEFINED | FLAG_SELECTOR_0_VAL_0
,FLAG_SELECTOR_0_DEFINED | FLAG_SELECTOR_0_VAL_1
,FLAG_SELECTOR_0_DEFINED | FLAG_SELECTOR_0_VAL_0 | FLAG_SELECTOR_0_VAL_1
,FLAG_SELECTOR_1_DEFINED
,FLAG_SELECTOR_1_DEFINED | FLAG_SELECTOR_1_VAL_0
,FLAG_SELECTOR_1_DEFINED | FLAG_SELECTOR_1_VAL_1
,FLAG_SELECTOR_1_DEFINED | FLAG_SELECTOR_1_VAL_1 | FLAG_SELECTOR_1_VAL_0
,FLAG_SELECTOR_2_DEFINED
,FLAG_SELECTOR_2_DEFINED | FLAG_SELECTOR_2_VAL_0
,FLAG_SELECTOR_2_DEFINED | FLAG_SELECTOR_2_VAL_1
,FLAG_SELECTOR_2_DEFINED | FLAG_SELECTOR_2_VAL_1 | FLAG_SELECTOR_2_VAL_0
/* , */
,FLAG_0
/* '-' */
,FLAG_1
/* '.' */
,FLAG_2
/* '/' */
,FLAG_3
};
uint8_t s_arch_int_amb_size[8] = {
sizeof(char)
,sizeof(short)
,sizeof(int)
,sizeof(long)
,sizeof(long long)
,sizeof(ptrdiff_t)
,sizeof(intptr_t)
,sizeof(intmax_t)
};
uint8_t s_arch_int_conc_size[32] = {
sizeof(uint_fast8_t)
,sizeof(uint_fast16_t)
,sizeof(uint_fast32_t)
,sizeof(uint_fast64_t)
,0
,0
,0
,0
,sizeof(uint_least8_t)
,sizeof(uint_least16_t)
,sizeof(uint_least32_t)
,sizeof(uint_least64_t)
,0
,0
,0
,0
,0
,0
,0
,0
,0
,0
,0
,0
};
#if 0
static inline void set_bytes(void* dest, uint8_t b, size_t size){
for(unsigned i = 0; i < size; ++i)
*(uint8_t*)(dest++) = b;
}
static inline void copy_bytes(void* dest, const void* src, size_t size){
for(unsigned i = 0; i < size; ++i)
*(uint8_t*)(dest++) = *(const uint8_t*)(src++);
}
#endif
#ifndef REPRINT_SINGLETON
void reprint_init(reprint_state* rs, const char* fmt, const void* data)
#else
static reprint_state s_rs;
void reprint_init(const char* fmt, const void* data)
#endif
{
#ifdef REPRINT_SINGLETON
reprint_state* rs = &s_rs;
#endif
memset(rs, 0, sizeof(reprint_state));
rs->fmt = (const uint8_t*)fmt;
rs->data = data;
}
__attribute__((__noinline__,__noclone__))
#ifndef REPRINT_SINGLETON
int reprint_cb(reprint_state* rs, uint8_t* dest, unsigned dest_len){
#else
int reprint_cb(uint8_t* dest, unsigned dest_len){
#endif
#ifdef REPRINT_SINGLETON
reprint_state* rs = &s_rs;
#endif
BEGIN:
assert(dest);
/* If processing an input specifier then handle that. */
/* rs->pc is only assigned labels with ST_ prefixed. */
if(rs->pc){
/* Decrement field width if non-zero */
if(rs->selectors & FLAG_FORMAT_BIT){
if(rs->registers[F_REG_FIELD_WIDTH]){
--rs->registers[F_REG_FIELD_WIDTH];
/* If padding is on left, then write that out. */
if(rs->selectors & F_FLAG_RIGHT_ALIGN){
*dest = rs->registers[F_REG_PAD_CHAR];
return 1;
}
}
}
goto *rs->pc;
}
{
const uint8_t* i = rs->fmt;
/* If fmt char is null terminator, just return. */
if(*i == '\0')
return 0;
/* Check if this is a field header. */
uint8_t* tmp = dest;
const uint8_t* end = dest + dest_len;
while(tmp != end && *i && ESCAPE_MASK != (*i & ~ESCAPE_SELECT)){
/* Copy character to output and advance format state. */
*tmp = *i;
++i;
++rs->fmt;
++tmp;
}
/* If wrote some string data then just return. */
if(tmp != dest)
return tmp - dest;
/* Check for double \b\b or \f\f, which means just
* send that char. */
if(*i == *(i + 1)){
*dest = *i;
rs->fmt += 2;
return 1;
}
/* Zero the state. Don't clear registers that are already set. */
rs->selectors = 0;
{
/* Invert the set registers. */
uint_fast8_t f = ~rs->reg_flags & 0x7F;
reprint_reg_t* r = rs->registers;
while(f){
if(f & 1)
*r = 0;
++r;
f >>= 1;
}
}
if(*i & ESCAPE_SELECT){
rs->selectors |= FLAG_FORMAT_BIT;
/* Default pad char is a ' '.*/
rs->registers[F_REG_PAD_CHAR] = ' ';
}
/* Go onto next character. */
++i;
/* Check for packing change directive. */
if(PACK_MASK == (*i & ~PACK_SELECT)){
rs->input_flags &= ~FLAG_REG_TIGHT_PACK;
rs->input_flags |= (*i & PACK_SELECT) << 5;
++i;
}
/* Parse modifiers. */
{
/* Do not write to output in this scope of code. */
const uint8_t* dest = NULL;
reprint_reg_t reg_value = 0;
/* Otherwise, found an escape character. Parse the field. */
while(*i < 0x40){
if(*i < 0x20)
assert(0);
if(*i < 0x30){
/* In the 0x20 column. */
rs->selectors |= s_selector_bits[*i & 0xF];
}
else{
/* If user specified value in fmt string, set this flag. */
uint_fast8_t user_flag = 0;
if(*i <= 0x39){
user_flag = 1;
/* If leading zero with digit, then octal. */
if(*i == 0x30){
++i;
/* Parse octal value. If no digits, then value is just zero.
* 8 and 9 are not expected; then will just wrap around...
* */
while(*i <= 0x39){
/* Should not mix selectors and flags inside a reg value. */
assert(*i >= 0x30);
reg_value <<= 3;
reg_value += (*i & 0x7);
++i;
}
}
else{
/* Parse decimal value into reg_value. */
while(*i <= 0x39){
/* Should not mix selectors and flags inside a reg value. */
assert(*i >= 0x30);
reg_value *= 10;
reg_value += (*i & 0xF);
++i;
}
}
}
else{
/* Registers without a preceding numeric value are to have
* their values loaded from the data. */
/* FIXME use packing rules as per FLAG_REG_TIGHT_PACK */
if(*i < 0x40){
reprint_reg_t* u = (reprint_reg_t*)(rs->data);
reg_value = *u;
rs->data += sizeof(*u);
}
}
if(*i >= 0x40){
/* Copy register value and break to specifier section. */
if(user_flag){
rs->reg_flags |= FLAG_REG_0_DEFINED;
rs->registers[0] = reg_value;
}
break;
}
else if(*i >= 0x3A){
unsigned id = *i - 0x39;
rs->reg_flags |= 1 << id;
rs->registers[id] = reg_value;
reg_value = 0;
}
}
++i;
}
}
/* Parse input specifier flags.
* Maintain the packing type. */
rs->input_flags &= FLAG_REG_TIGHT_PACK;
while(*i < 0x70){
/* This is an error. */
if(*i < 0x60)
assert(0);
if(*i < 0x68){
rs->input_flags |= (*i & 0x7);
}
else if(*i < 0x6C){
rs->input_flags |= (*i & 0x3) << 3;
}
else{
rs->input_flags |= (*i & 0x3) << 5;
}
++i;
}
/* Catch up to i. */
rs->fmt = i;
}
/* Load data according to specifier. */
{
/* Track total length of field (if necessary) */
unsigned total_len = 0;
/* Do not write to output in this scope of code. */
const uint8_t* dest = NULL;
/* First branch on Integer or not. */
if(!(*rs->fmt & SFLAG_SPECIAL)){
if(!(rs->input_flags & IFLAG_NONINTEG)){
/* Yes, I did just do that. Go look at the included .c file. */
#define REPRINT_GUARD_reprint_cb_QUANTITY_SPECIFIER
#include "reprint_cb_quantity_specifier.c"
#undef REPRINT_GUARD_reprint_cb_QUANTITY_SPECIFIER
}
else{
/* This is a non-integer value. */
if((rs->input_flags & IFLAG_TMASK) == IFLAG_FLOAT){
/* Yes, I did just do that. Go look at the included .c file. */
#define REPRINT_GUARD_reprint_cb_FLOAT_SPECIFIER
#include "reprint_cb_float_specifier.c"
#undef REPRINT_GUARD_reprint_cb_FLOAT_SPECIFIER
}
else{
/* This is a string or char. */
if((rs->input_flags & IFLAG_TMASK) == IFLAG_CHAR){
/* Assuming 8-bit character.
* TODO support wchar_t and unicode point ids.
* On some platforms (Linux et al) these will be the same types
* On Windows char_t is 16 bit. */
rs->cur_data.binary = *(uint8_t*)(rs->data);
++rs->data;
/* Increment the repeat register.
* Initialized to zero with user intervention. */
++rs->registers[FTC_REG_REPEAT];
total_len = rs->registers[FTC_REG_REPEAT];
rs->pc = &&ST_CHAR;
}
else{
/* This is a string. */
/* Align to ptr and assign rs->cur_data.text. */
if(FLAG_REG_TIGHT_PACK & rs->input_flags){
memcpy(&rs->cur_data.text, rs->data, sizeof(rs->cur_data.text));
}
else{
rs->data = s_arch_align_ptr(rs->data, sizeof(const uint8_t*));
rs->cur_data.text = (const uint8_t*)(rs->data);
}
rs->data += sizeof(rs->cur_data.text);
/* Trying to avoid strlen call if at all possible. */
/* If start range is specified, add to the start pointer.
* ASSUME user did not put start past actual string length!! */
if(rs->reg_flags & (1 << TS_REG_START)){
rs->cur_data.text += rs->registers[TS_REG_START];
}
/* Trust the user on its length.
* TODO maybe do strlen to double check??*/
if(rs->reg_flags & (1 << TS_REG_LENGTH)){
total_len = rs->registers[TS_REG_LENGTH];
}
if(rs->selectors & FLAG_FORMAT_BIT){
if(rs->registers[F_REG_FIELD_WIDTH] && !total_len){
/* Calculate string length, determine if it exceeds padding.
* Assuming UTF-8 string for now.
* TODO support char16_t, char32_t, wchar_t. */
total_len = strlen((char*)rs->cur_data.text);
}
}
rs->pc = &&ST_TEXT;
}
}
}
}
else{
if(*(rs->fmt) == SPECIFIER_POINTER){
/* TODO */
assert(0);
}
else if(*(rs->fmt) == SPECIFIER_RECURSE){
/* TODO */
assert(0);
}
#ifdef ARCH_SPECIFIER_IMPLEMENTATION
else if(*(rs->fmt) == SPECIFIER_IMPLEMENTATION){
#define REPRINT_GUARD_reprint_cb_IMPLEMENTATION_SPECIFIER
#include "reprint_cb_implementation_specifier.c"
#undef REPRINT_GUARD_reprint_cb_IMPLEMENTATION_SPECIFIER
}
#endif
#ifdef RP_CFG_SPECIFIER_USER
else if(*(rs->fmt) == SPECIFIER_USER){
/* FIXME determine callback specifics */
}
#endif
else{
assert(0);
}
}
/* If total length exceeds the fieldwidth then zero fieldwidth;
* otherwise subtract the char count from fieldwidth. */
if(rs->selectors & FLAG_FORMAT_BIT){
if(rs->selectors & F_FLAG_RIGHT_ALIGN){
if(total_len < rs->registers[F_REG_FIELD_WIDTH]){
rs->registers[F_REG_FIELD_WIDTH] -= total_len;
--rs->registers[F_REG_FIELD_WIDTH];
goto ST_WRITE_CHAR;
}
else{
rs->registers[F_REG_FIELD_WIDTH] = 0;
}
}
}
/* Dispatch. */
goto *rs->pc;
}
#define REPRINT_GUARD_reprint_cb_QUANTITY
#include "reprint_cb_quantity.c"
#undef REPRINT_GUARD_reprint_cb_QUANTITY
#ifdef ARCH_SPECIFIER_IMPLEMENTATION
#define REPRINT_GUARD_reprint_cb_IMPLEMENTATION
#include "reprint_cb_implementation.c"
#undef REPRINT_GUARD_reprint_cb_IMPLEMENTATION
#endif
ST_TEXT:
if(!*rs->cur_data.text)
goto ST_FIELD_DONE;
if(rs->reg_flags & (1 << TS_REG_LENGTH)){
if(0 == rs->registers[TS_REG_LENGTH])
goto ST_FIELD_DONE;
--rs->registers[TS_REG_LENGTH];
}
*dest = *rs->cur_data.text;
++rs->cur_data.text;
return 1;
ST_CHAR:
if(!rs->registers[FTC_REG_REPEAT])
goto ST_FIELD_DONE;
*dest = rs->cur_data.binary;
--rs->registers[FTC_REG_REPEAT];
return 1;
ST_FIELD_DONE:
{
rs->pc = &&ST_WRITE_PAD;
ST_WRITE_PAD:
if(rs->selectors & FLAG_FORMAT_BIT){
if(rs->registers[F_REG_FIELD_WIDTH]){
ST_WRITE_CHAR:
*dest = rs->registers[F_REG_PAD_CHAR];
return 1;
}
/* unset field width and pad char flags. */
rs->reg_flags &= ~((1 << F_REG_FIELD_WIDTH) | (1 << F_REG_PAD_CHAR));
}
}
/* Finished outputting the field!! */
++rs->fmt;
rs->pc = NULL;
goto BEGIN;
}