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New \ codes and bug fixes

This commit is contained in:
gingerBill 2016-05-12 23:16:37 +01:00
parent af72e48601
commit b4e34b810b
2 changed files with 68 additions and 25 deletions
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4
README.md
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@ -4,12 +4,12 @@ gb single-file public domain libraries for C & C++
library | latest version | category | description
----------------|----------------|----------|-------------
**gb.h** | 0.11a | misc | Helper library (Standard Library _Improvement_)
**gb.h** | 0.11a | misc | Helper library (Standard library _improvement_)
**gb_math.h** | 0.06c | math | Vector math library geared towards game development
**gb_gl.h** | 0.04b | graphics | OpenGL Helper Library
**gb_string.h** | 0.95 | strings | A better string library (this is built into gb.h too with custom allocator support!)
**gb_ini.h** | 0.93 | misc | Simple ini file loader library
**gb_regex.h** | 0.01 | regex | Highly experimental Regular Expressions Library
**gb_regex.h** | 0.01a | regex | Highly experimental regular expressions library
## FAQ

89
gb_regex.h
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@ -1,4 +1,4 @@
/* gb_regex.h - v0.01 - Regular Expressions Library - public domain
/* gb_regex.h - v0.01a - Regular Expressions Library - public domain
- no warranty implied; use at your own risk
This is a single header file with a bunch of useful stuff
@ -20,6 +20,7 @@
Version History:
0.01a - New \ codes and bug fixes
0.01 - Initial Version
LICENSE
@ -39,10 +40,6 @@ NOTES
()
[]
[^]
\s
\S
\d
\D
+
+?
*
@ -51,6 +48,18 @@ NOTES
\XX
\meta
\s
\S
\d
\D
\a
\l
\u
\w
\W
\x
\p
--Whitespace--
\t
\n
@ -58,6 +67,10 @@ NOTES
\v
\f
TODO
{m,n}
(?:)
CREDITS
Written by Ginger Bill
@ -206,11 +219,19 @@ typedef enum gbreOp {
} gbreOp;
typedef enum gbreCode {
GBRE_CODE_NULL = 0x0000,
GBRE_CODE_WHITESPACE = 0x0100,
GBRE_CODE_NOT_WHITESPACE = 0x0200,
GBRE_CODE_DIGIT = 0x0300,
GBRE_CODE_NOT_DIGIT = 0x0400
GBRE_CODE_NULL = 0x0000,
GBRE_CODE_WHITESPACE = 0x0100,
GBRE_CODE_NOT_WHITESPACE = 0x0200,
GBRE_CODE_DIGIT = 0x0300,
GBRE_CODE_NOT_DIGIT = 0x0400,
GBRE_CODE_ALPHA = 0x0500,
GBRE_CODE_LOWER = 0x0600,
GBRE_CODE_UPPER = 0x0700,
GBRE_CODE_WORD = 0x0800,
GBRE_CODE_NOT_WORD = 0x0900,
GBRE_CODE_XDIGIT = 0x0a00,
GBRE_CODE_PRINTABLE = 0x0b00,
} gbreCode;
typedef struct gbreContext {
@ -297,7 +318,6 @@ gbre__strfind(char const *str, isize len, char c, isize offset)
return -1;
}
static gbreBool
gbre__match_escape(char c, int code)
{
@ -307,6 +327,16 @@ gbre__match_escape(char c, int code)
case GBRE_CODE_NOT_WHITESPACE: return gbre__strfind(GBRE__LITERAL(GBRE__WHITESPACE), c, 0) < 0;
case GBRE_CODE_DIGIT: return gbre__strfind(GBRE__LITERAL("0123456789"), c, 0) >= 0;
case GBRE_CODE_NOT_DIGIT: return gbre__strfind(GBRE__LITERAL("0123456789"), c, 0) < 0;
case GBRE_CODE_ALPHA: return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
case GBRE_CODE_LOWER: return (c >= 'a' && c <= 'z');
case GBRE_CODE_UPPER: return (c >= 'A' && c <= 'Z');
/* TODO(bill): Make better */
case GBRE_CODE_WORD: return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') || c == '_';
case GBRE_CODE_NOT_WORD: return !((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') || c == '_');
case GBRE_CODE_XDIGIT: return gbre__strfind(GBRE__LITERAL("0123456789ABCDEFabcdef"), c, 0) >= 0;
case GBRE_CODE_PRINTABLE: return c >= 0x20 && c <= 0x7e;
default: break;
}
return GBRE_FALSE;
@ -314,8 +344,8 @@ gbre__match_escape(char c, int code)
static gbreContext
gbre__consume_longest(gbRegex *re, isize op, char *str, isize str_len, isize offset,
gbreCapture *captures, isize max_capture_count)
gbre__greedy_consume(gbRegex *re, isize op, char *str, isize str_len, isize offset,
gbreCapture *captures, isize max_capture_count)
{
gbreContext c, best_c, next_c;
@ -349,8 +379,8 @@ gbre__consume_longest(gbRegex *re, isize op, char *str, isize str_len, isize off
static gbreContext
gbre__consume_shortest(gbRegex *re, isize op, char *str, isize str_len, isize offset,
gbreCapture *captures, isize max_capture_count)
gbre__non_greedy_consume(gbRegex *re, isize op, char *str, isize str_len, isize offset,
gbreCapture *captures, isize max_capture_count)
{
gbreContext c, best_c, next_c;
@ -494,7 +524,7 @@ gbre__exec_single(gbRegex *re, isize op, char *str, isize str_len, isize offset,
} break;
case GBRE_OP_ZERO_OR_MORE: {
context = gbre__consume_longest(re, op, str, str_len, offset, captures, max_capture_count);
context = gbre__greedy_consume(re, op, str, str_len, offset, captures, max_capture_count);
offset = context.offset;
op = context.op;
} break;
@ -503,13 +533,13 @@ gbre__exec_single(gbRegex *re, isize op, char *str, isize str_len, isize offset,
context = gbre__exec_single(re, op, str, str_len, offset, captures, max_capture_count);
if (context.offset > str_len)
return context;
context = gbre__consume_longest(re, op, str, str_len, context.offset, captures, max_capture_count);
context = gbre__greedy_consume(re, op, str, str_len, context.offset, captures, max_capture_count);
offset = context.offset;
op = context.op;
} break;
case GBRE_OP_ZERO_OR_MORE_SHORTEST: {
context = gbre__consume_shortest(re, op, str, str_len, offset, captures, max_capture_count);
context = gbre__non_greedy_consume(re, op, str, str_len, offset, captures, max_capture_count);
offset = context.offset;
op = context.op;
} break;
@ -518,7 +548,7 @@ gbre__exec_single(gbRegex *re, isize op, char *str, isize str_len, isize offset,
context = gbre__exec_single(re, op, str, str_len, offset, captures, max_capture_count);
if (context.offset > str_len)
return context;
context = gbre__consume_shortest(re, op, str, str_len, context.offset, captures,
context = gbre__non_greedy_consume(re, op, str, str_len, context.offset, captures,
max_capture_count);
offset = context.offset;
op = context.op;
@ -664,16 +694,28 @@ gbre__encode_espace(char code)
case 'v': return '\v';
case '0': return GBRE_CODE_NULL;
case 's': return GBRE_CODE_WHITESPACE;
case 'S': return GBRE_CODE_NOT_WHITESPACE;
case 'd': return GBRE_CODE_DIGIT;
case 'D': return GBRE_CODE_NOT_DIGIT;
case 'a': return GBRE_CODE_ALPHA;
case 'l': return GBRE_CODE_LOWER;
case 'u': return GBRE_CODE_UPPER;
case 'w': return GBRE_CODE_WORD;
case 'W': return GBRE_CODE_NOT_WORD;
case 'x': return GBRE_CODE_XDIGIT;
case 'p': return GBRE_CODE_PRINTABLE;
}
return code;
}
static gbreError
gbre__parse_group(gbRegex *re, char *pattern, isize len, isize offset, gbreBool allow_grow)
gbre__parse_group(gbRegex *re, char *pattern, isize len, isize offset, gbreBool allow_grow, isize *new_offset)
{
gbreError err = GBRE_ERROR_NONE;
unsigned char buffer[256] = {0}; /* NOTE(bill): ascii is only 7/8 bits */
@ -726,7 +768,8 @@ gbre__parse_group(gbRegex *re, char *pattern, isize len, isize offset, gbreBool
if (err) return err;
if (!closed) return GBRE_ERROR_MISMATCHED_BLOCKS;
return (offset == len) ? GBRE_ERROR_NONE : GBRE_ERROR_NO_MATCH;
if (new_offset) *new_offset = offset;
return GBRE_ERROR_NONE;
}
static gbreError
@ -784,7 +827,7 @@ gbre__parse(gbRegex *re, char *pattern, isize len, isize offset, gbreBool allow_
err = gbre__emit(re, allow_grow, 2, GBRE_OP_BEGIN_CAPTURE, (int)capture);
if (err) return err;
gbre__parse(re, pattern, len, offset, allow_grow, level+1, &offset);
err = gbre__parse(re, pattern, len, offset, allow_grow, level+1, &offset);
if ((offset > len) || (pattern[offset-1] != ')'))
return GBRE_ERROR_MISMATCHED_CAPTURES;
@ -805,7 +848,7 @@ gbre__parse(gbRegex *re, char *pattern, isize len, isize offset, gbreBool allow_
case '[': {
last_buf_len = re->buf_len;
offset = gbre__parse_group(re, pattern, len, offset, allow_grow);
err = gbre__parse_group(re, pattern, len, offset, allow_grow, &offset);
if (offset > len)
return err;
} break;