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rewritten ini parser for smaller size

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remotes/github/bad-doublebuf
Ondřej Hruška 7 years ago
parent ed7a4c80a0
commit 4b8d24ae0f
Signed by: MightyPork
GPG Key ID: 2C5FD5035250423D
3 changed files with 117 additions and 793 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 614
      utils/ini_parser.c
  2. 12
      utils/ini_parser.h
  3. 284
      utils/ini_parser.rl

614
utils/ini_parser.c
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@ -1,526 +1,134 @@
/* #line 1 "ini_parser.rl" */
/* Ragel constants block */
#include "ini_parser.h"
// Ragel setup
/* #line 10 "ini_parser.c" */
static const char _ini_actions[] = {
0, 1, 1, 1, 2, 1, 3, 1,
4, 1, 5, 1, 6, 1, 7, 1,
8, 1, 9, 1, 10, 1, 11, 1,
13, 2, 0, 4, 2, 12, 4
enum nini_state {
NINI_IDLE,
NINI_SECTION,
NINI_KEY,
NINI_VALUE,
NINI_COMMENT,
};
static const char _ini_eof_actions[] = {
0, 23, 5, 5, 15, 15, 15, 15,
19, 19, 0, 0, 0, 0, 0, 0,
0
};
static const int ini_start = 1;
static const int ini_first_final = 12;
static const int ini_error = 0;
static const int ini_en_section = 2;
static const int ini_en_keyvalue = 4;
static const int ini_en_comment = 8;
static const int ini_en_discard2eol = 10;
static const int ini_en_main = 1;
/* #line 10 "ini_parser.rl" */
// Persistent state
static int8_t cs = -1; //!< Ragel's Current State variable
static uint32_t buff_i = 0; //!< Write pointer for the buffers
static char value_quote = 0; //!< Quote character of the currently collected value
static bool value_nextesc = false; //!< Next character is escaped, trated specially, and if quote, as literal quote character
static IniParserCallback keyCallback = NULL; //!< Currently assigned callback
static void *userdata = NULL; //!< Currently assigned user data for the callback
// Buffers
static char keybuf[INI_KEY_MAX];
static char secbuf[INI_KEY_MAX+10];
static char valbuf[INI_VALUE_MAX];
// See header for doxygen!
static struct {
uint8_t section_i;
char section[INI_KEY_MAX];
void
ini_parse_reset_partial(void)
{
buff_i = 0;
value_quote = 0;
value_nextesc = false;
}
uint8_t key_i;
char key[INI_KEY_MAX];
void
ini_parse_reset(void)
{
ini_parse_reset_partial();
keybuf[0] = secbuf[0] = valbuf[0] = 0;
/* #line 67 "ini_parser.c" */
{
cs = ini_start;
}
uint8_t value_i;
char value[INI_VALUE_MAX];
bool val_last_space;
/* #line 41 "ini_parser.rl" */
}
IniParserCallback cb;
void *userdata;
enum nini_state state;
} nini;
void
ini_parser_error(const char* msg)
void ini_parse_begin(IniParserCallback callback, void *userData)
{
ini_error("Parser error: %s", msg);
ini_parse_reset_partial();
ini_parse_reset();
nini.cb = callback;
nini.userdata = userData;
}
void
ini_parse_begin(IniParserCallback callback, void *userData)
void ini_parse(const char *data, size_t len)
{
keyCallback = callback;
userdata = userData;
ini_parse_reset();
for (; len > 0; len--) {
char c = *data++;
if (c == ' ' || c == '\t' || c == '\r' || c == '\n') {
if (nini.state != NINI_VALUE && nini.state != NINI_COMMENT)
continue;
}
switch (nini.state) {
case NINI_IDLE:
if (c == '[') {
nini.state = NINI_SECTION;
nini.section_i = 0;
}
else if (c == '#') {
nini.state = NINI_COMMENT;
}
else {
nini.state = NINI_KEY;
nini.key_i = 0;
nini.value_i = 0;
nini.val_last_space = false;
nini.key[nini.key_i++] = c;
}
break;
case NINI_COMMENT:
if (c == '\n' || c == '\r') {
nini.state = NINI_IDLE;
}
break;
case NINI_SECTION:
if (c == ']') {
nini.section[nini.section_i] = 0;
nini.state = NINI_COMMENT; // discard to EOL
break;
}
else if (nini.section_i < INI_KEY_MAX - 1) {
nini.section[nini.section_i++] = c;
}
break;
case NINI_KEY:
if (c == '=') {
nini.key[nini.key_i] = 0;
nini.state = NINI_VALUE;
}
else if (nini.key_i < INI_KEY_MAX - 1) {
nini.key[nini.key_i++] = c;
}
break;
case NINI_VALUE:
switch (c) {
case ' ':
case '\t':
if (nini.value_i) nini.val_last_space = true;
break;
case '\r':
case '\n':
nini.value[nini.value_i] = 0;
nini.state = NINI_IDLE;
nini.cb(nini.section, nini.key, nini.value, nini.userdata);
break;
default:
if (nini.val_last_space && nini.value_i < INI_VALUE_MAX - 1) {
nini.value[nini.value_i++] = ' ';
}
if (nini.value_i < INI_VALUE_MAX - 1) {
nini.value[nini.value_i++] = c;
}
}
}
}
}
void
*ini_parse_end(void)
void *ini_parse_end(void)
{
ini_parse("\n", 1);
if (keyCallback) {
keyCallback = NULL;
}
if (nini.state == NINI_VALUE) {
nini.value[nini.value_i] = 0;
nini.state = NINI_IDLE;
nini.cb(nini.section, nini.key, nini.value, nini.userdata);
}
void *ud = userdata;
userdata = NULL;
return ud;
return nini.userdata;
}
void
ini_parse_file(const char *text, size_t len, IniParserCallback callback, void *userData)
{
ini_parse_begin(callback, userData);
ini_parse(text, len);
ini_parse_end();
}
static void
rtrim_buf(char *buf, int32_t end)
void ini_parse_file(const char *text, size_t len, IniParserCallback callback, void *userData)
{
if (end > 0) {
while ((uint8_t)buf[--end] < 33);
end++; // go past the last character
}
buf[end] = 0;
ini_parse_begin(callback, userData);
ini_parse(text, len);
ini_parse_end();
}
void
ini_parse(const char *newstr, size_t len)
void ini_parse_reset(void)
{
int32_t i;
char c;
bool isnl;
bool isquot;
// Load new data to Ragel vars
const uint8_t *p;
const uint8_t *eof;
const uint8_t *pe;
if (len == 0) while(newstr[++len] != 0); // alternative to strlen
p = (const uint8_t *) newstr;
eof = NULL;
pe = (const uint8_t *) (newstr + len);
// Init Ragel on the first run
if (cs == -1) {
ini_parse_reset();
}
// The parser
/* #line 152 "ini_parser.c" */
{
const char *_acts;
unsigned int _nacts;
if ( p == pe )
goto _test_eof;
if ( cs == 0 )
goto _out;
_resume:
switch ( cs ) {
case 1:
switch( (*p) ) {
case 32u: goto tr1;
case 35u: goto tr3;
case 58u: goto tr0;
case 59u: goto tr3;
case 61u: goto tr0;
case 91u: goto tr4;
}
if ( (*p) < 9u ) {
if ( (*p) <= 8u )
goto tr0;
} else if ( (*p) > 13u ) {
if ( 14u <= (*p) && (*p) <= 31u )
goto tr0;
} else
goto tr1;
goto tr2;
case 0:
goto _out;
case 12:
goto tr0;
case 2:
switch( (*p) ) {
case 9u: goto tr6;
case 32u: goto tr6;
case 93u: goto tr5;
}
if ( (*p) <= 31u )
goto tr5;
goto tr7;
case 3:
if ( (*p) == 93u )
goto tr8;
if ( (*p) > 8u ) {
if ( 10u <= (*p) && (*p) <= 31u )
goto tr5;
} else
goto tr5;
goto tr7;
case 13:
goto tr5;
case 4:
switch( (*p) ) {
case 10u: goto tr10;
case 58u: goto tr11;
case 61u: goto tr11;
}
goto tr9;
case 5:
switch( (*p) ) {
case 9u: goto tr13;
case 10u: goto tr14;
case 13u: goto tr15;
case 32u: goto tr13;
}
goto tr12;
case 6:
switch( (*p) ) {
case 10u: goto tr14;
case 13u: goto tr15;
}
goto tr12;
case 14:
goto tr10;
case 7:
if ( (*p) == 10u )
goto tr14;
goto tr10;
case 8:
switch( (*p) ) {
case 10u: goto tr17;
case 13u: goto tr18;
}
goto tr16;
case 15:
goto tr19;
case 9:
if ( (*p) == 10u )
goto tr17;
goto tr19;
case 10:
switch( (*p) ) {
case 10u: goto tr21;
case 13u: goto tr22;
}
goto tr20;
case 16:
goto tr23;
case 11:
if ( (*p) == 10u )
goto tr21;
goto tr23;
}
tr23: cs = 0; goto _again;
tr0: cs = 0; goto f0;
tr5: cs = 0; goto f4;
tr10: cs = 0; goto f7;
tr19: cs = 0; goto f11;
tr1: cs = 1; goto _again;
tr6: cs = 2; goto _again;
tr7: cs = 3; goto f5;
tr9: cs = 4; goto f8;
tr13: cs = 5; goto _again;
tr11: cs = 5; goto f9;
tr12: cs = 6; goto f10;
tr15: cs = 7; goto _again;
tr16: cs = 8; goto _again;
tr18: cs = 9; goto _again;
tr20: cs = 10; goto _again;
tr22: cs = 11; goto _again;
tr2: cs = 12; goto f1;
tr3: cs = 12; goto f2;
tr4: cs = 12; goto f3;
tr8: cs = 13; goto f6;
tr14: cs = 14; goto f10;
tr17: cs = 15; goto f12;
tr21: cs = 16; goto f13;
f5: _acts = _ini_actions + 1; goto execFuncs;
f6: _acts = _ini_actions + 3; goto execFuncs;
f4: _acts = _ini_actions + 5; goto execFuncs;
f1: _acts = _ini_actions + 7; goto execFuncs;
f8: _acts = _ini_actions + 9; goto execFuncs;
f9: _acts = _ini_actions + 11; goto execFuncs;
f10: _acts = _ini_actions + 13; goto execFuncs;
f7: _acts = _ini_actions + 15; goto execFuncs;
f12: _acts = _ini_actions + 17; goto execFuncs;
f11: _acts = _ini_actions + 19; goto execFuncs;
f13: _acts = _ini_actions + 21; goto execFuncs;
f0: _acts = _ini_actions + 23; goto execFuncs;
f3: _acts = _ini_actions + 25; goto execFuncs;
f2: _acts = _ini_actions + 28; goto execFuncs;
execFuncs:
_nacts = *_acts++;
while ( _nacts-- > 0 ) {
switch ( *_acts++ ) {
case 0:
/* #line 130 "ini_parser.rl" */
{
buff_i = 0;
{cs = 2;goto _again;}
}
break;
case 1:
/* #line 135 "ini_parser.rl" */
{
if (buff_i >= INI_KEY_MAX) {
ini_parser_error("Section name too long");
{cs = 10;goto _again;}
}
keybuf[buff_i++] = (*p);
}
break;
case 2:
/* #line 143 "ini_parser.rl" */
{
// we need a separate buffer for the result, otherwise a failed
// partial parse would corrupt the section string
rtrim_buf(keybuf, buff_i);
for (i = 0; (c = keybuf[i]) != 0; i++) secbuf[i] = c;
secbuf[i] = 0;
{cs = 1;goto _again;}
}
break;
case 3:
/* #line 155 "ini_parser.rl" */
{
ini_parser_error("Syntax error in [section]");
if((*p) == '\n') {cs = 1;goto _again;} else {cs = 10;goto _again;}
}
break;
case 4:
/* #line 162 "ini_parser.rl" */
{
buff_i = 0;
keybuf[buff_i++] = (*p); // add the first char
{cs = 4;goto _again;}
}
break;
case 5:
/* #line 168 "ini_parser.rl" */
{
if (buff_i >= INI_KEY_MAX) {
ini_parser_error("Key too long");
{cs = 10;goto _again;}
}
keybuf[buff_i++] = (*p);
}
break;
case 6:
/* #line 176 "ini_parser.rl" */
{
rtrim_buf(keybuf, buff_i);
// --- Value begin ---
buff_i = 0;
value_quote = 0;
value_nextesc = false;
}
break;
case 7:
/* #line 185 "ini_parser.rl" */
{
isnl = ((*p) == '\r' || (*p) == '\n');
isquot = ((*p) == '\'' || (*p) == '"');
// detect our starting quote
if (isquot && !value_nextesc && buff_i == 0 && value_quote == 0) {
value_quote = (*p);
goto valueCharDone;
}
if (buff_i >= INI_VALUE_MAX) {
ini_parser_error("Value too long");
{cs = 10;goto _again;}
}
// end of string - clean up and report
if ((!value_nextesc && (*p) == value_quote) || isnl) {
if (isnl && value_quote) {
ini_parser_error("Unterminated string");
{cs = 1;goto _again;}
}
// unquoted: trim from the end
if (!value_quote) {
rtrim_buf(valbuf, buff_i);
} else {
valbuf[buff_i] = 0;
}
if (keyCallback) {
keyCallback(secbuf, keybuf, valbuf, userdata);
}
// we don't want to discard to eol if the string was terminated by eol
// - would delete the next line
if (isnl) {cs = 1;goto _again;} else {cs = 10;goto _again;}
}
c = (*p);
// escape...
if (value_nextesc) {
if ((*p) == 'n') c = '\n';
else if ((*p) == 'r') c = '\r';
else if ((*p) == 't') c = '\t';
else if ((*p) == 'e') c = '\033';
}
// collecting characters...
if (value_nextesc || (*p) != '\\') { // is quoted, or is not a quoting backslash - literal character
valbuf[buff_i++] = c;
}
value_nextesc = (!value_nextesc && (*p) == '\\');
valueCharDone:;
}
break;
case 8:
/* #line 247 "ini_parser.rl" */
{
ini_parser_error("Syntax error in key=value");
if((*p) == '\n') {cs = 1;goto _again;} else {cs = 10;goto _again;}
}
break;
case 9:
/* #line 257 "ini_parser.rl" */
{ {cs = 1;goto _again;} }
break;
case 10:
/* #line 258 "ini_parser.rl" */
{
ini_parser_error("Syntax error in comment");
if((*p) == '\n') {cs = 1;goto _again;} else {cs = 10;goto _again;}
}
break;
case 11:
/* #line 265 "ini_parser.rl" */
{ {cs = 1;goto _again;} }
break;
case 12:
/* #line 273 "ini_parser.rl" */
{ {cs = 8;goto _again;} }
break;
case 13:
/* #line 276 "ini_parser.rl" */
{
ini_parser_error("Syntax error in root");
{cs = 10;goto _again;}
}
break;
/* #line 458 "ini_parser.c" */
}
}
goto _again;
_again:
if ( cs == 0 )
goto _out;
if ( ++p != pe )
goto _resume;
_test_eof: {}
if ( p == eof )
{
const char *__acts = _ini_actions + _ini_eof_actions[cs];
unsigned int __nacts = (unsigned int) *__acts++;
while ( __nacts-- > 0 ) {
switch ( *__acts++ ) {
case 3:
/* #line 155 "ini_parser.rl" */
{
ini_parser_error("Syntax error in [section]");
if((*p) == '\n') {cs = 1; if ( p == pe )
goto _test_eof;
goto _again;} else {cs = 10; if ( p == pe )
goto _test_eof;
goto _again;}
}
break;
case 8:
/* #line 247 "ini_parser.rl" */
{
ini_parser_error("Syntax error in key=value");
if((*p) == '\n') {cs = 1; if ( p == pe )
goto _test_eof;
goto _again;} else {cs = 10; if ( p == pe )
goto _test_eof;
goto _again;}
}
break;
case 10:
/* #line 258 "ini_parser.rl" */
{
ini_parser_error("Syntax error in comment");
if((*p) == '\n') {cs = 1; if ( p == pe )
goto _test_eof;
goto _again;} else {cs = 10; if ( p == pe )
goto _test_eof;
goto _again;}
}
break;
case 13:
/* #line 276 "ini_parser.rl" */
{
ini_parser_error("Syntax error in root");
{cs = 10; if ( p == pe )
goto _test_eof;
goto _again;}
}
break;
/* #line 517 "ini_parser.c" */
}
}
}
_out: {}
}
/* #line 283 "ini_parser.rl" */
nini.state = NINI_IDLE;
}

12
utils/ini_parser.h
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@ -8,12 +8,12 @@
#include "platform.h"
// toggleable logging func
#ifdef DEBUG_INI
#define ini_error(fmt, ...) dbg("! INI err: "#fmt, ##__VA_ARGS__)
#else
#define ini_error(fmt, ...)
#endif
//// toggleable logging func
//#ifdef DEBUG_INI
//#define ini_error(fmt, ...) dbg("! INI err: "#fmt, ##__VA_ARGS__)
//#else
//#define ini_error(fmt, ...)
//#endif
// buffer sizes
//#define INI_KEY_MAX 20

284
utils/ini_parser.rl
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@ -1,284 +0,0 @@
/* Ragel constants block */
#include "ini_parser.h"
// Ragel setup
%%{
machine ini;
write data;
alphtype unsigned char;
}%%
// Persistent state
static int8_t cs = -1; //!< Ragel's Current State variable
static uint32_t buff_i = 0; //!< Write pointer for the buffers
static char value_quote = 0; //!< Quote character of the currently collected value
static bool value_nextesc = false; //!< Next character is escaped, trated specially, and if quote, as literal quote character
static IniParserCallback keyCallback = NULL; //!< Currently assigned callback
static void *userdata = NULL; //!< Currently assigned user data for the callback
// Buffers
static char keybuf[INI_KEY_MAX];
static char secbuf[INI_KEY_MAX];
static char valbuf[INI_VALUE_MAX];
// See header for doxygen!
void
ini_parse_reset_partial(void)
{
buff_i = 0;
value_quote = 0;
value_nextesc = false;
}
void
ini_parse_reset(void)
{
ini_parse_reset_partial();
keybuf[0] = secbuf[0] = valbuf[0] = 0;
%% write init;
}
void
ini_parser_error(const char* msg)
{
ini_error("Parser error: %s", msg);
ini_parse_reset_partial();
}
void
ini_parse_begin(IniParserCallback callback, void *userData)
{
keyCallback = callback;
userdata = userData;
ini_parse_reset();
}
void
*ini_parse_end(void)
{
ini_parse("\n", 1);
if (keyCallback) {
keyCallback = NULL;
}
void *ud = userdata;
userdata = NULL;
return ud;
}
void
ini_parse_file(const char *text, size_t len, IniParserCallback callback, void *userData)
{
ini_parse_begin(callback, userData);
ini_parse(text, len);
ini_parse_end();
}
static void
rtrim_buf(char *buf, int32_t end)
{
if (end > 0) {
while ((uint8_t)buf[--end] < 33);
end++; // go past the last character
}
buf[end] = 0;
}
void
ini_parse(const char *newstr, size_t len)
{
int32_t i;
char c;
bool isnl;
bool isquot;
// Load new data to Ragel vars
const uint8_t *p;
const uint8_t *eof;
const uint8_t *pe;
if (len == 0) while(newstr[++len] != 0); // alternative to strlen
p = (const uint8_t *) newstr;
eof = NULL;
pe = (const uint8_t *) (newstr + len);
// Init Ragel on the first run
if (cs == -1) {
ini_parse_reset();
}
// The parser
%%{
#/ *
ispace = [ \t]; # inline space
wchar = any - 0..8 - 10..31;
#apos = '\'';
#quot = '\"';
nonl = [^\r\n];
nl = '\r'? '\n';
# ---- [SECTION] ----
action sectionStart {
buff_i = 0;
fgoto section;
}
action sectionChar {
if (buff_i >= INI_KEY_MAX) {
ini_parser_error("Section name too long");
fgoto discard2eol;
}
keybuf[buff_i++] = fc;
}
action sectionEnd {
// we need a separate buffer for the result, otherwise a failed
// partial parse would corrupt the section string
rtrim_buf(keybuf, buff_i);
for (i = 0; (c = keybuf[i]) != 0; i++) secbuf[i] = c;
secbuf[i] = 0;
fgoto main;
}
section :=
(
ispace* <: ((wchar - ']')+ @sectionChar) ']' @sectionEnd
) $!{
ini_parser_error("Syntax error in [section]");
if(fc == '\n') fgoto main; else fgoto discard2eol;
};
# ---- KEY=VALUE ----
action keyStart {
buff_i = 0;
keybuf[buff_i++] = fc; // add the first char
fgoto keyvalue;
}
action keyChar {
if (buff_i >= INI_KEY_MAX) {
ini_parser_error("Key too long");
fgoto discard2eol;
}
keybuf[buff_i++] = fc;
}
action keyEnd {
rtrim_buf(keybuf, buff_i);
// --- Value begin ---
buff_i = 0;
value_quote = 0;
value_nextesc = false;
}
action valueChar {
isnl = (fc == '\r' || fc == '\n');
isquot = (fc == '\'' || fc == '"');
// detect our starting quote
if (isquot && !value_nextesc && buff_i == 0 && value_quote == 0) {
value_quote = fc;
goto valueCharDone;
}
if (buff_i >= INI_VALUE_MAX) {
ini_parser_error("Value too long");
fgoto discard2eol;
}
// end of string - clean up and report
if ((!value_nextesc && fc == value_quote) || isnl) {
if (isnl && value_quote) {
ini_parser_error("Unterminated string");
fgoto main;
}
// unquoted: trim from the end
if (!value_quote) {
rtrim_buf(valbuf, buff_i);
} else {
valbuf[buff_i] = 0;
}
if (keyCallback) {
keyCallback(secbuf, keybuf, valbuf, userdata);
}
// we don't want to discard to eol if the string was terminated by eol
// - would delete the next line
if (isnl) fgoto main; else fgoto discard2eol;
}
c = fc;
// escape...
if (value_nextesc) {
if (fc == 'n') c = '\n';
else if (fc == 'r') c = '\r';
else if (fc == 't') c = '\t';
else if (fc == 'e') c = '\033';
}
// collecting characters...
if (value_nextesc || fc != '\\') { // is quoted, or is not a quoting backslash - literal character
valbuf[buff_i++] = c;
}
value_nextesc = (!value_nextesc && fc == '\\');
valueCharDone:;
}
# use * for key, first char is already consumed.
keyvalue :=
(
([^\n=:]* @keyChar %keyEnd)
[=:] ispace* <: nonl* @valueChar nl @valueChar
) $!{
ini_parser_error("Syntax error in key=value");
if(fc == '\n') fgoto main; else fgoto discard2eol;
};
# ---- COMMENT ----
comment :=
(
nonl* nl
@{ fgoto main; }
) $!{
ini_parser_error("Syntax error in comment");
if(fc == '\n') fgoto main; else fgoto discard2eol;
};
# ---- CLEANUP ----
discard2eol := nonl* nl @{ fgoto main; };
# ---- ROOT ----
main :=
(space*
(
'[' @sectionStart |
[#;] @{ fgoto comment; } |
(wchar - [\t =:]) @keyStart
)
) $!{
ini_parser_error("Syntax error in root");
fgoto discard2eol;
};
write exec;
#*/
}%%
}
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