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tokenize.cpp
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1202 lines (1084 loc) · 26.9 KB
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/**
* @file tokenize.cpp
* This file breaks up the text stream into tokens or chunks.
*
* Each routine needs to set pc->len and pc->type.
*
* @author Ben Gardner
* @license GPL v2+
*/
#include "uncrustify_types.h"
#include "char_table.h"
#include "prototypes.h"
#include "chunk_list.h"
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cerrno>
#include "unc_ctype.h"
static bool parse_string(chunk_t *pc, int quote_idx, bool allow_escape);
#include "d.tokenize.cpp"
/**
* A string-in-string search. Like strstr() with a haystack length.
*/
static const char *str_search(const char *needle, const char *haystack, int haystack_len)
{
int needle_len = strlen(needle);
while (haystack_len-- >= needle_len)
{
if (memcmp(needle, haystack, needle_len) == 0)
{
return(haystack);
}
haystack++;
}
return(NULL);
}
/**
* Figure of the length of the comment at text.
* The next bit of text starts with a '/', so it might be a comment.
* There are three types of comments:
* - C comments that start with '/ *' and end with '* /'
* - C++ comments that start with //
* - D nestable comments '/+' '+/'
*
* @param pc The structure to update, str is an input.
* @return Whether a comment was parsed
*/
static bool parse_comment(chunk_t *pc)
{
int len = 2;
bool is_d = (cpd.lang_flags & LANG_D) != 0;
int d_level = 0;
int bs_cnt;
if ((pc->str[0] != '/') ||
((pc->str[1] != '*') && (pc->str[1] != '/') &&
((pc->str[1] != '+') || !is_d)))
{
return(false);
}
/* account for opening two chars */
cpd.column += 2;
if (pc->str[1] == '/')
{
pc->type = CT_COMMENT_CPP;
while (true)
{
bs_cnt = 0;
while ((pc->str[len] != '\n') &&
(pc->str[len] != '\r') &&
(pc->str[len] != 0))
{
if (pc->str[len] == '\\')
{
bs_cnt++;
}
else
{
bs_cnt = 0;
}
len++;
}
/* If we hit an odd number of backslashes right before the newline,
* then we keep going.
*/
if (((bs_cnt & 1) == 0) || (pc->str[len] == 0))
{
break;
}
if (pc->str[len] == '\r')
{
len++;
}
if (pc->str[len] == '\n')
{
len++;
}
}
}
else if (pc->str[len] == 0)
{
/* unexpected end of file */
return(false);
}
else if (pc->str[1] == '+')
{
pc->type = CT_COMMENT;
d_level++;
while ((d_level > 0) && (pc->str[len + 1] != 0))
{
if ((pc->str[len] == '+') && (pc->str[len + 1] == '/'))
{
len += 2;
cpd.column += 2;
d_level--;
continue;
}
if ((pc->str[len] == '/') && (pc->str[len + 1] == '+'))
{
len += 2;
cpd.column += 2;
d_level++;
continue;
}
if ((pc->str[len] == '\n') || (pc->str[len] == '\r'))
{
pc->type = CT_COMMENT_MULTI;
pc->nl_count++;
cpd.column = 0;
cpd.line_number++;
if (pc->str[len] == '\r')
{
if (pc->str[len + 1] == '\n')
{
cpd.le_counts[LE_CRLF]++;
len++;
}
else
{
cpd.le_counts[LE_CR]++;
}
}
else
{
cpd.le_counts[LE_LF]++;
}
}
len++;
cpd.column++;
}
}
else
{
pc->type = CT_COMMENT;
while (pc->str[len + 1] != 0)
{
if ((pc->str[len] == '*') && (pc->str[len + 1] == '/'))
{
len += 2;
cpd.column += 2;
/* If there is another C comment right after this one, combine them */
int tmp_len = len;
while ((pc->str[tmp_len] == ' ') ||
(pc->str[tmp_len] == '\t'))
{
tmp_len++;
}
if ((pc->str[tmp_len] != '/') || (pc->str[tmp_len + 1] != '*'))
{
break;
}
pc->len = tmp_len;
}
if ((pc->str[len] == '\n') || (pc->str[len] == '\r'))
{
pc->type = CT_COMMENT_MULTI;
pc->nl_count++;
cpd.column = 0;
cpd.line_number++;
if (pc->str[len] == '\r')
{
if (pc->str[len + 1] == '\n')
{
cpd.le_counts[LE_CRLF]++;
len++;
}
else
{
cpd.le_counts[LE_CR]++;
}
}
else
{
cpd.le_counts[LE_LF]++;
}
}
len++;
cpd.column++;
}
}
pc->len = len;
if (cpd.unc_off)
{
if (str_search(UNCRUSTIFY_ON_TEXT, pc->str, pc->len) != NULL)
{
LOG_FMT(LBCTRL, "Found '%s' on line %d\n", UNCRUSTIFY_ON_TEXT, pc->orig_line);
cpd.unc_off = false;
}
}
else
{
if (str_search(UNCRUSTIFY_OFF_TEXT, pc->str, pc->len) != NULL)
{
LOG_FMT(LBCTRL, "Found '%s' on line %d\n", UNCRUSTIFY_OFF_TEXT, pc->orig_line);
cpd.unc_off = true;
}
}
return(true);
}
/**
* Count the number of characters in the number.
* The next bit of text starts with a number (0-9 or '.'), so it is a number.
* Count the number of characters in the number.
*
* This should cover all number formats for all languages.
* Note that this is not a strict parser. It will happily parse numbers in
* an invalid format.
*
* For example, only D allows underscores in the numbers, but they are
* allowed in all formats.
*
* @param pc The structure to update, str is an input.
* @return Whether a number was parsed
*/
static bool parse_number(chunk_t *pc)
{
int len;
int tmp;
bool is_float;
bool did_hex = false;
/* A number must start with a digit or a dot, followed by a digit */
if (!unc_isdigit(pc->str[0]) &&
((pc->str[0] != '.') || !unc_isdigit(pc->str[1])))
{
return(false);
}
len = 1;
is_float = (pc->str[0] == '.');
if (is_float && (pc->str[1] == '.'))
{
return(false);
}
/* Check for Hex, Octal, or Binary
* Note that only D and Pawn support binary, but who cares?
*/
if (pc->str[0] == '0')
{
switch (unc_toupper(pc->str[1]))
{
case 'X': /* hex */
did_hex = true;
do
{
len++;
} while (unc_isxdigit(pc->str[len]) || (pc->str[len] == '_'));
break;
case 'B': /* binary */
do
{
len++;
} while ((pc->str[len] == '0') || (pc->str[len] == '1') ||
(pc->str[len] == '_'));
break;
case '0': /* octal */
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
do
{
len++;
} while (((pc->str[len] >= '0') && (pc->str[len] <= '7')) ||
(pc->str[len] == '_'));
break;
default:
/* either just 0 or 0.1 or 0UL, etc */
break;
}
}
else
{
/* Regular int or float */
while (unc_isdigit(pc->str[len]) || (pc->str[len] == '_'))
{
len++;
}
}
/* Check if we stopped on a decimal point & make sure it isn't '..' */
if ((pc->str[len] == '.') && (pc->str[len + 1] != '.'))
{
len++;
is_float = true;
if (did_hex)
{
while (unc_isxdigit(pc->str[len]) || (pc->str[len] == '_'))
{
len++;
}
}
else
{
while (unc_isdigit(pc->str[len]) || (pc->str[len] == '_'))
{
len++;
}
}
}
/* Check exponent
* Valid exponents per language (not that it matters):
* C/C++/D/Java: eEpP
* C#/Pawn: eE
*/
tmp = unc_toupper(pc->str[len]);
if ((tmp == 'E') || (tmp == 'P'))
{
is_float = true;
len++;
if ((pc->str[len] == '+') || (pc->str[len] == '-'))
{
len++;
}
while (unc_isdigit(pc->str[len]) || (pc->str[len] == '_'))
{
len++;
}
}
/* Check the suffixes
* Valid suffixes per language (not that it matters):
* Integer Float
* C/C++: uUlL64 lLfF
* C#: uUlL fFdDMm
* D: uUL ifFL
* Java: lL fFdD
* Pawn: (none) (none)
*
* Note that i, f, d, and m only appear in floats.
*/
while (1)
{
tmp = unc_toupper(pc->str[len]);
if ((tmp == 'I') || (tmp == 'F') || (tmp == 'D') || (tmp == 'M'))
{
is_float = true;
}
else if ((tmp != 'L') && (tmp != 'U'))
{
break;
}
len++;
}
/* skip the Microsoft-specific '64' suffix */
if ((pc->str[len] == '6') && (pc->str[len + 1] == '4'))
{
len += 2;
}
/* It there is anything left, then we are probably dealing with garbage or
* some sick macro junk. Eat it.
*/
while (unc_isalnum(pc->str[len]))
{
len++;
}
pc->len = len;
pc->type = is_float ? CT_NUMBER_FP : CT_NUMBER;
cpd.column += len;
return(true);
}
/**
* Count the number of characters in a quoted string.
* The next bit of text starts with a quote char " or ' or <.
* Count the number of characters until the matching character.
*
* @param pc The structure to update, str is an input.
* @return Whether a string was parsed
*/
static bool parse_string(chunk_t *pc, int quote_idx, bool allow_escape)
{
bool escaped = 0;
int end_ch;
int len = quote_idx;
char escape_char = cpd.settings[UO_string_escape_char].n;
char escape_char2 = cpd.settings[UO_string_escape_char2].n;
pc->type = CT_STRING;
end_ch = CharTable::Get(pc->str[len]) & 0xff;
len++;
cpd.column += len;
for (/* nada */; pc->str[len] != 0; len++)
{
cpd.column++;
if ((pc->str[len] == '\n') ||
((pc->str[len] == '\r') && (pc->str[len + 1] != '\n')))
{
cpd.line_number++;
cpd.column = 1;
pc->nl_count++;
pc->type = CT_STRING_MULTI;
}
if (!escaped)
{
if (pc->str[len] == escape_char)
{
escaped = (escape_char != 0);
}
else if ((pc->str[len] == escape_char2) &&
(pc->str[len + 1] == end_ch))
{
escaped = allow_escape;
}
else if (pc->str[len] == end_ch)
{
len++;
break;
}
}
else
{
escaped = false;
}
}
/* D can have suffixes */
if (((cpd.lang_flags & LANG_D) != 0) &&
((pc->str[len] == 'c') ||
(pc->str[len] == 'w') ||
(pc->str[len] == 'd')))
{
len++;
cpd.column++;
}
pc->len = len;
return(true);
}
/**
* Literal string, ends with single "
* Two "" don't end the string.
*
* @param pc The structure to update, str is an input.
* @return Whether a string was parsed
*/
static bool parse_cs_string(chunk_t *pc)
{
int len = 2;
/* go until we hit a zero (end of file) or a single " */
while (pc->str[len] != 0)
{
if ((pc->str[len] == '"') && (pc->str[len + 1] == '"'))
{
len += 2;
}
else
{
len++;
if (pc->str[len - 1] == '"')
{
break;
}
}
}
pc->len = len;
pc->type = CT_STRING;
cpd.column += len;
return(true);
}
/**
* Count the number of characters in a word.
* The first character is already valid for a keyword
*
* @param pc The structure to update, str is an input.
* @return Whether a word was parsed (always true)
*/
bool parse_word(chunk_t *pc, bool skipcheck)
{
int len = 1;
const chunk_tag_t *tag;
while ((pc->str[len] < 127) && CharTable::IsKw2(pc->str[len]))
{
len++;
}
cpd.column += len;
pc->len = len;
pc->type = CT_WORD;
if (skipcheck)
{
return(true);
}
/* Detect pre-processor functions now */
if ((cpd.in_preproc == CT_PP_DEFINE) &&
(cpd.preproc_ncnl_count == 1))
{
if (pc->str[len] == '(')
{
pc->type = CT_MACRO_FUNC;
}
else
{
pc->type = CT_MACRO;
}
}
/* Turn it into a keyword now */
tag = find_keyword(pc->str, len);
if (tag != NULL)
{
pc->type = tag->type;
}
return(true);
}
/**
* Count the number of whitespace characters.
*
* @param pc The structure to update, str is an input.
* @return Whether whitespace was parsed
*/
static bool parse_whitespace(chunk_t *pc)
{
int len = 0;
int nl_count = 0;
bool last_was_tab = false;
while ((pc->str[len] != 0) &&
((pc->str[len] <= ' ') || (pc->str[len] >= 127)))
{
last_was_tab = false;
switch (pc->str[len])
{
case '\r':
if (pc->str[len + 1] == '\n')
{
/* CRLF ending */
len++;
cpd.le_counts[LE_CRLF]++;
}
else
{
/* CR ending */
cpd.le_counts[LE_CR]++;
}
nl_count++;
cpd.column = 1;
cpd.line_number++;
break;
case '\n':
/* LF ending */
cpd.le_counts[LE_LF]++;
nl_count++;
cpd.column = 1;
cpd.line_number++;
break;
case '\t':
cpd.column = calc_next_tab_column(cpd.column,
cpd.settings[UO_input_tab_size].n);
last_was_tab = true;
break;
case ' ':
cpd.column++;
break;
default:
break;
}
len++;
}
if (len > 0)
{
pc->nl_count = nl_count;
pc->type = nl_count ? CT_NEWLINE : CT_WHITESPACE;
pc->len = len;
pc->after_tab = last_was_tab;
}
return(len != 0);
}
/**
* Count the number of non-ascii characters at the start of a file.
*
* @param pc The structure to update, str is an input.
* @return Whether a BOM was parsed
*/
static bool parse_bom(chunk_t *pc)
{
int len = 0;
while ((pc->str[len] != 0) &&
((pc->str[len] <= 0) || (pc->str[len] >= 127)))
{
len++;
}
if (len > 0)
{
pc->type = CT_SOF;
pc->len = len;
}
return(len != 0);
}
/**
* Called when we hit a backslash.
* If there is nothing but whitespace until the newline, then this is a
* backslash newline
*/
static bool parse_bs_newline(chunk_t *pc)
{
pc->len = 1;
while (unc_isspace(pc->str[pc->len]))
{
if ((pc->str[pc->len] == '\r') || (pc->str[pc->len] == '\n'))
{
if (pc->str[pc->len] == '\n')
{
pc->len++;
}
else /* it is '\r' */
{
pc->len++;
if (pc->str[pc->len] == '\n')
{
pc->len++;
}
}
pc->type = CT_NL_CONT;
pc->nl_count = 1;
return(true);
}
pc->len++;
}
return(false);
}
/**
* Parses any number of tab or space chars followed by a newline.
* Does not change pc->len if a newline isn't found.
* This is not the same as parse_whitespace() because it only consumes until
* a single newline is encountered.
*/
static bool parse_newline(chunk_t *pc)
{
int len = pc->len;
while ((pc->str[len] == ' ') || (pc->str[len] == '\t'))
{
len++;
}
if ((pc->str[len] == '\r') || (pc->str[len] == '\n'))
{
if (pc->str[len] == '\n')
{
len++;
}
else /* it is '\r' */
{
len++;
if (pc->str[len] == '\n')
{
len++;
}
}
pc->len = len;
return(true);
}
return(false);
}
static bool parse_ignored(chunk_t *pc)
{
int nl_count = 0;
/* Parse off newlines */
while (parse_newline(pc))
{
nl_count++;
}
if (nl_count > 0)
{
cpd.column = 1;
cpd.line_number += nl_count;
pc->nl_count = nl_count;
pc->type = CT_NEWLINE;
return(true);
}
/* Look for the ending comment and let it pass */
if (parse_comment(pc) && !cpd.unc_off)
{
return(true);
}
pc->len = 0;
/* Reset the chunk & scan to until a newline */
while ((pc->str[pc->len] != 0) &&
(pc->str[pc->len] != '\r') &&
(pc->str[pc->len] != '\n'))
{
pc->len++;
}
if (pc->len > 0)
{
pc->type = CT_IGNORED;
return(true);
}
return(false);
}
/**
* Skips the next bit of whatever and returns the type of block.
*
* pc->str is the input text.
* pc->len in the output length.
* pc->type is the output type
* pc->column is output column
*
* @param pc The structure to update, str is an input.
* @return true/false - whether anything was parsed
*/
static bool parse_next(chunk_t *pc)
{
const chunk_tag_t *punc;
if ((pc == NULL) || (pc->str == NULL) || (*pc->str == 0))
{
//fprintf(stderr, "All done!\n");
return(false);
}
/* Save off the current column */
pc->orig_line = cpd.line_number;
pc->column = cpd.column;
pc->orig_col = cpd.column;
pc->len = 0;
pc->type = CT_NONE;
pc->nl_count = 0;
pc->flags = 0;
/* If it is turned off, we put everything except newlines into CT_UNKNOWN */
if (cpd.unc_off)
{
if (parse_ignored(pc))
{
return(true);
}
}
if (chunk_get_head() == NULL)
{
if (parse_bom(pc))
{
return(true);
}
}
/**
* Parse whitespace
*/
if (parse_whitespace(pc))
{
return(true);
}
/**
* Handle unknown/unhandled preprocessors
*/
if ((cpd.in_preproc > CT_PP_BODYCHUNK) &&
(cpd.in_preproc <= CT_PP_OTHER))
{
/* Chunk to a newline or comment */
pc->type = CT_PREPROC_BODY;
char last = 0;
while (pc->str[pc->len] != 0)
{
char ch = pc->str[pc->len];
if ((ch == '\n') || (ch == '\r'))
{
/* Back off if this is an escaped newline */
if (last == '\\')
{
pc->len--;
}
break;
}
/* Quit on a C++ comment start */
if ((ch == '/') && (pc->str[pc->len + 1] == '/'))
{
break;
}
last = ch;
pc->len++;
}
if (pc->len > 0)
{
return(true);
}
}
/**
* Detect backslash-newline
*
* REVISIT: does this need to handle other line endings?
*/
if ((pc->str[0] == '\\') && parse_bs_newline(pc))
{
cpd.column = 1;
cpd.line_number++;
return(true);
}
/**
* Parse comments
*/
if (parse_comment(pc))
{
return(true);
}
/* Check for C# literal strings, ie @"hello" */
if (((cpd.lang_flags & LANG_CS) != 0) && (*pc->str == '@'))
{
if (pc->str[1] == '"')
{
parse_cs_string(pc);
return(true);
}
if (CharTable::IsKw1(pc->str[1]) && parse_word(pc, true))
{
return(true);
}
}
/* Check for Obj-C NSString constants, ie @"hello" */
if (((cpd.lang_flags & LANG_OC) != 0) && (*pc->str == '@'))
{
if (pc->str[1] == '"')
{
parse_string(pc, 1, true);
return(true);
}
}
/* PAWN specific stuff */
if ((cpd.lang_flags & LANG_PAWN) != 0)
{
/* Check for PAWN strings: \"hi" or !"hi" or !\"hi" or \!"hi" */
if ((pc->str[0] == '\\') || (pc->str[0] == '!'))
{
if (pc->str[1] == '"')
{
parse_string(pc, 1, (*pc->str == '!'));
return(true);
}
else if (((pc->str[1] == '\\') || (pc->str[1] == '!')) &&
(pc->str[2] == '"'))
{
parse_string(pc, 2, false);
return(true);
}
}
}
/**
* Parse strings and character constants
*/
if (parse_number(pc))
{
return(true);
}
if ((cpd.lang_flags & LANG_D) != 0)
{
/* D specific stuff */
if (d_parse_string(pc))
{
return(true);
}
}
else
{
/* Not D stuff */
/* Check for L'a', L"abc", 'a', "abc", <abc> strings */
if ((((*pc->str == 'L') || (*pc->str == 'S')) &&
((pc->str[1] == '"') || (pc->str[1] == '\''))) ||
(*pc->str == '"') ||
(*pc->str == '\'') ||
((*pc->str == '<') && (cpd.in_preproc == CT_PP_INCLUDE)))
{
parse_string(pc, unc_isalpha(*pc->str) ? 1 : 0, true);
return(true);
}
if ((*pc->str == '<') && (cpd.in_preproc == CT_PP_DEFINE))
{
if (chunk_get_tail()->type == CT_MACRO)
{
/* We have "#define XXX <", assume '<' starts an include string */
parse_string(pc, 0, false);
return(true);
}
}
}
/* Check for pawn/ObjectiveC identifiers */
if ((*pc->str == '@') &&
CharTable::IsKw2(pc->str[1]) &&
parse_word(pc, false))
{
return(true);
}
if (CharTable::IsKw1(*pc->str) && parse_word(pc, false))
{
return(true);
}
if ((punc = find_punctuator(pc->str, cpd.lang_flags)) != NULL)
{
pc->type = punc->type;
pc->len = strlen(punc->tag);
cpd.column += pc->len;
pc->flags |= PCF_PUNCTUATOR;
return(true);
}
/* throw away this character */
pc->type = CT_UNKNOWN;
pc->len = 1;
LOG_FMT(LWARN, "%s:%d Garbage in col %d: %x\n",