version 1.12, 2009/09/16 14:40:56 |
version 1.30, 2015/04/02 21:36:49 |
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/* $Id$ */ |
/* $Id$ */ |
/* |
/* |
* Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se> |
* Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv> |
* |
* |
* Permission to use, copy, modify, and distribute this software for any |
* Permission to use, copy, modify, and distribute this software for any |
* purpose with or without fee is hereby granted, provided that the above |
* purpose with or without fee is hereby granted, provided that the above |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
*/ |
*/ |
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#include "config.h" |
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#include <sys/types.h> |
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#include <assert.h> |
#include <assert.h> |
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#include <ctype.h> |
#include <limits.h> |
#include <limits.h> |
#include <stdlib.h> |
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#include <string.h> |
#include <string.h> |
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#include "roff.h" |
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#include "man.h" |
#include "libman.h" |
#include "libman.h" |
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#define HASH_DEPTH 6 |
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static unsigned char table[26 * 6]; |
#define HASH_ROW(x) do { \ |
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if (isupper((unsigned char)(x))) \ |
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(x) -= 65; \ |
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else \ |
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(x) -= 97; \ |
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(x) *= HASH_DEPTH; \ |
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} while (/* CONSTCOND */ 0) |
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/* |
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* Lookup table is indexed first by lower-case first letter (plus one |
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* for the period, which is stored in the last row), then by lower or |
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* uppercase second letter. Buckets correspond to the index of the |
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* macro (the integer value of the enum stored as a char to save a bit |
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* of space). |
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*/ |
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static unsigned char table[26 * HASH_DEPTH]; |
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/* |
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* XXX - this hash has global scope, so if intended for use as a library |
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* with multiple callers, it will need re-invocation protection. |
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*/ |
void |
void |
man_hash_init(void) |
man_hash_init(void) |
{ |
{ |
Line 32 man_hash_init(void) |
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Line 58 man_hash_init(void) |
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memset(table, UCHAR_MAX, sizeof(table)); |
memset(table, UCHAR_MAX, sizeof(table)); |
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for (i = 0; i < MAN_MAX; i++) { |
assert(MAN_MAX < UCHAR_MAX); |
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for (i = 0; i < (int)MAN_MAX; i++) { |
x = man_macronames[i][0]; |
x = man_macronames[i][0]; |
assert((x >= 65 && x <= 90) || |
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(x >= 97 && x <= 122)); |
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x -= (x <= 90) ? 65 : 97; |
assert(isalpha((unsigned char)x)); |
x *= 6; |
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for (j = 0; j < 6; j++) |
HASH_ROW(x); |
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for (j = 0; j < HASH_DEPTH; j++) |
if (UCHAR_MAX == table[x + j]) { |
if (UCHAR_MAX == table[x + j]) { |
table[x + j] = i; |
table[x + j] = (unsigned char)i; |
break; |
break; |
} |
} |
assert(j < 6); |
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assert(j < HASH_DEPTH); |
} |
} |
} |
} |
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enum mant |
int |
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man_hash_find(const char *tmp) |
man_hash_find(const char *tmp) |
{ |
{ |
int x, i, tok; |
int x, y, i; |
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enum mant tok; |
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if (0 == (x = tmp[0])) |
if ('\0' == (x = tmp[0])) |
return(MAN_MAX); |
return(MAN_MAX); |
if ( ! ((x >= 65 && x <= 90) || (x >= 97 && x <= 122))) |
if ( ! (isalpha((unsigned char)x))) |
return(MAN_MAX); |
return(MAN_MAX); |
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x -= (x <= 90) ? 65 : 97; |
HASH_ROW(x); |
x *= 6; |
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for (i = 0; i < 6; i++) { |
for (i = 0; i < HASH_DEPTH; i++) { |
if (UCHAR_MAX == (tok = table[x + i])) |
if (UCHAR_MAX == (y = table[x + i])) |
return(MAN_MAX); |
return(MAN_MAX); |
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tok = (enum mant)y; |
if (0 == strcmp(tmp, man_macronames[tok])) |
if (0 == strcmp(tmp, man_macronames[tok])) |
return(tok); |
return(tok); |
} |
} |