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git.ipfire.org Git - thirdparty/cups.git/blob - cups/string.c
2 * String functions for CUPS.
4 * Copyright 2007-2014 by Apple Inc.
5 * Copyright 1997-2007 by Easy Software Products.
7 * These coded instructions, statements, and computer programs are the
8 * property of Apple Inc. and are protected by Federal copyright
9 * law. Distribution and use rights are outlined in the file "LICENSE.txt"
10 * which should have been included with this file. If this file is
11 * missing or damaged, see the license at "http://www.cups.org/".
13 * This file is subject to the Apple OS-Developed Software exception.
17 * Include necessary headers...
20 #define _CUPS_STRING_C_
21 #include "cups-private.h"
30 static _cups_mutex_t sp_mutex
= _CUPS_MUTEX_INITIALIZER
;
31 /* Mutex to control access to pool */
32 static cups_array_t
*stringpool
= NULL
;
33 /* Global string pool */
40 static int compare_sp_items(_cups_sp_item_t
*a
, _cups_sp_item_t
*b
);
44 * '_cupsStrAlloc()' - Allocate/reference a string.
47 char * /* O - String pointer */
48 _cupsStrAlloc(const char *s
) /* I - String */
50 size_t slen
; /* Length of string */
51 _cups_sp_item_t
*item
, /* String pool item */
52 *key
; /* Search key */
56 * Range check input...
63 * Get the string pool...
66 _cupsMutexLock(&sp_mutex
);
69 stringpool
= cupsArrayNew((cups_array_func_t
)compare_sp_items
, NULL
);
73 _cupsMutexUnlock(&sp_mutex
);
79 * See if the string is already in the pool...
82 key
= (_cups_sp_item_t
*)(s
- offsetof(_cups_sp_item_t
, str
));
84 if ((item
= (_cups_sp_item_t
*)cupsArrayFind(stringpool
, key
)) != NULL
)
87 * Found it, return the cached string...
93 DEBUG_printf(("5_cupsStrAlloc: Using string %p(%s) for \"%s\", guard=%08x, "
94 "ref_count=%d", item
, item
->str
, s
, item
->guard
,
97 if (item
->guard
!= _CUPS_STR_GUARD
)
99 #endif /* DEBUG_GUARDS */
101 _cupsMutexUnlock(&sp_mutex
);
107 * Not found, so allocate a new one...
111 item
= (_cups_sp_item_t
*)calloc(1, sizeof(_cups_sp_item_t
) + slen
);
114 _cupsMutexUnlock(&sp_mutex
);
120 memcpy(item
->str
, s
, slen
+ 1);
123 item
->guard
= _CUPS_STR_GUARD
;
125 DEBUG_printf(("5_cupsStrAlloc: Created string %p(%s) for \"%s\", guard=%08x, "
126 "ref_count=%d", item
, item
->str
, s
, item
->guard
,
128 #endif /* DEBUG_GUARDS */
131 * Add the string to the pool and return it...
134 cupsArrayAdd(stringpool
, item
);
136 _cupsMutexUnlock(&sp_mutex
);
143 * '_cupsStrDate()' - Return a localized date for a given time value.
145 * This function works around the locale encoding issues of strftime...
148 char * /* O - Buffer */
149 _cupsStrDate(char *buf
, /* I - Buffer */
150 size_t bufsize
, /* I - Size of buffer */
151 time_t timeval
) /* I - Time value */
153 struct tm
*dateval
; /* Local date/time */
154 char temp
[1024]; /* Temporary buffer */
155 _cups_globals_t
*cg
= _cupsGlobals(); /* Per-thread globals */
158 if (!cg
->lang_default
)
159 cg
->lang_default
= cupsLangDefault();
161 dateval
= localtime(&timeval
);
163 if (cg
->lang_default
->encoding
!= CUPS_UTF8
)
165 strftime(temp
, sizeof(temp
), "%c", dateval
);
166 cupsCharsetToUTF8((cups_utf8_t
*)buf
, temp
, (int)bufsize
, cg
->lang_default
->encoding
);
169 strftime(buf
, bufsize
, "%c", dateval
);
176 * '_cupsStrFlush()' - Flush the string pool.
182 _cups_sp_item_t
*item
; /* Current item */
185 DEBUG_printf(("4_cupsStrFlush: %d strings in array",
186 cupsArrayCount(stringpool
)));
188 _cupsMutexLock(&sp_mutex
);
190 for (item
= (_cups_sp_item_t
*)cupsArrayFirst(stringpool
);
192 item
= (_cups_sp_item_t
*)cupsArrayNext(stringpool
))
195 cupsArrayDelete(stringpool
);
198 _cupsMutexUnlock(&sp_mutex
);
203 * '_cupsStrFormatd()' - Format a floating-point number.
206 char * /* O - Pointer to end of string */
207 _cupsStrFormatd(char *buf
, /* I - String */
208 char *bufend
, /* I - End of string buffer */
209 double number
, /* I - Number to format */
210 struct lconv
*loc
) /* I - Locale data */
212 char *bufptr
, /* Pointer into buffer */
213 temp
[1024], /* Temporary string */
214 *tempdec
, /* Pointer to decimal point */
215 *tempptr
; /* Pointer into temporary string */
216 const char *dec
; /* Decimal point */
217 int declen
; /* Length of decimal point */
221 * Format the number using the "%.12f" format and then eliminate
222 * unnecessary trailing 0's.
225 snprintf(temp
, sizeof(temp
), "%.12f", number
);
226 for (tempptr
= temp
+ strlen(temp
) - 1;
227 tempptr
> temp
&& *tempptr
== '0';
231 * Next, find the decimal point...
234 if (loc
&& loc
->decimal_point
)
236 dec
= loc
->decimal_point
;
237 declen
= (int)strlen(dec
);
246 tempdec
= strchr(temp
, *dec
);
248 tempdec
= strstr(temp
, dec
);
251 * Copy everything up to the decimal point...
256 for (tempptr
= temp
, bufptr
= buf
;
257 tempptr
< tempdec
&& bufptr
< bufend
;
258 *bufptr
++ = *tempptr
++);
262 if (*tempptr
&& bufptr
< bufend
)
266 while (*tempptr
&& bufptr
< bufend
)
267 *bufptr
++ = *tempptr
++;
274 strlcpy(buf
, temp
, (size_t)(bufend
- buf
+ 1));
275 bufptr
= buf
+ strlen(buf
);
283 * '_cupsStrFree()' - Free/dereference a string.
287 _cupsStrFree(const char *s
) /* I - String to free */
289 _cups_sp_item_t
*item
, /* String pool item */
290 *key
; /* Search key */
294 * Range check input...
301 * Check the string pool...
303 * We don't need to lock the mutex yet, as we only want to know if
304 * the stringpool is initialized. The rest of the code will still
305 * work if it is initialized before we lock...
312 * See if the string is already in the pool...
315 _cupsMutexLock(&sp_mutex
);
317 key
= (_cups_sp_item_t
*)(s
- offsetof(_cups_sp_item_t
, str
));
320 if (key
->guard
!= _CUPS_STR_GUARD
)
322 DEBUG_printf(("5_cupsStrFree: Freeing string %p(%s), guard=%08x, "
323 "ref_count=%d", key
, key
->str
, key
->guard
, key
->ref_count
));
326 #endif /* DEBUG_GUARDS */
328 if ((item
= (_cups_sp_item_t
*)cupsArrayFind(stringpool
, key
)) != NULL
&&
332 * Found it, dereference...
337 if (!item
->ref_count
)
343 cupsArrayRemove(stringpool
, item
);
349 _cupsMutexUnlock(&sp_mutex
);
354 * '_cupsStrRetain()' - Increment the reference count of a string.
356 * Note: This function does not verify that the passed pointer is in the
357 * string pool, so any calls to it MUST know they are passing in a
361 char * /* O - Pointer to string */
362 _cupsStrRetain(const char *s
) /* I - String to retain */
364 _cups_sp_item_t
*item
; /* Pointer to string pool item */
369 item
= (_cups_sp_item_t
*)(s
- offsetof(_cups_sp_item_t
, str
));
372 if (item
->guard
!= _CUPS_STR_GUARD
)
374 DEBUG_printf(("5_cupsStrRetain: Retaining string %p(%s), guard=%08x, "
375 "ref_count=%d", item
, s
, item
->guard
, item
->ref_count
));
378 #endif /* DEBUG_GUARDS */
380 _cupsMutexLock(&sp_mutex
);
384 _cupsMutexUnlock(&sp_mutex
);
392 * '_cupsStrScand()' - Scan a string for a floating-point number.
394 * This function handles the locale-specific BS so that a decimal
395 * point is always the period (".")...
398 double /* O - Number */
399 _cupsStrScand(const char *buf
, /* I - Pointer to number */
400 char **bufptr
, /* O - New pointer or NULL on error */
401 struct lconv
*loc
) /* I - Locale data */
403 char temp
[1024], /* Temporary buffer */
404 *tempptr
; /* Pointer into temporary buffer */
408 * Range check input...
415 * Skip leading whitespace...
418 while (_cups_isspace(*buf
))
422 * Copy leading sign, numbers, period, and then numbers...
426 if (*buf
== '-' || *buf
== '+')
429 while (isdigit(*buf
& 255))
430 if (tempptr
< (temp
+ sizeof(temp
) - 1))
443 * Read fractional portion of number...
448 if (loc
&& loc
->decimal_point
)
450 strlcpy(tempptr
, loc
->decimal_point
, sizeof(temp
) - (size_t)(tempptr
- temp
));
451 tempptr
+= strlen(tempptr
);
453 else if (tempptr
< (temp
+ sizeof(temp
) - 1))
463 while (isdigit(*buf
& 255))
464 if (tempptr
< (temp
+ sizeof(temp
) - 1))
475 if (*buf
== 'e' || *buf
== 'E')
481 if (tempptr
< (temp
+ sizeof(temp
) - 1))
491 if (*buf
== '+' || *buf
== '-')
493 if (tempptr
< (temp
+ sizeof(temp
) - 1))
504 while (isdigit(*buf
& 255))
505 if (tempptr
< (temp
+ sizeof(temp
) - 1))
517 * Nul-terminate the temporary string and return the value...
521 *bufptr
= (char *)buf
;
525 return (strtod(temp
, NULL
));
530 * '_cupsStrStatistics()' - Return allocation statistics for string pool.
533 size_t /* O - Number of strings */
534 _cupsStrStatistics(size_t *alloc_bytes
, /* O - Allocated bytes */
535 size_t *total_bytes
) /* O - Total string bytes */
537 size_t count
, /* Number of strings */
538 abytes
, /* Allocated string bytes */
539 tbytes
, /* Total string bytes */
540 len
; /* Length of string */
541 _cups_sp_item_t
*item
; /* Current item */
545 * Loop through strings in pool, counting everything up...
548 _cupsMutexLock(&sp_mutex
);
550 for (count
= 0, abytes
= 0, tbytes
= 0,
551 item
= (_cups_sp_item_t
*)cupsArrayFirst(stringpool
);
553 item
= (_cups_sp_item_t
*)cupsArrayNext(stringpool
))
556 * Count allocated memory, using a 64-bit aligned buffer as a basis.
559 count
+= item
->ref_count
;
560 len
= (strlen(item
->str
) + 8) & (size_t)~7;
561 abytes
+= sizeof(_cups_sp_item_t
) + len
;
562 tbytes
+= item
->ref_count
* len
;
565 _cupsMutexUnlock(&sp_mutex
);
572 *alloc_bytes
= abytes
;
575 *total_bytes
= tbytes
;
582 * '_cups_strcpy()' - Copy a string allowing for overlapping strings.
586 _cups_strcpy(char *dst
, /* I - Destination string */
587 const char *src
) /* I - Source string */
597 * '_cups_strdup()' - Duplicate a string.
601 char * /* O - New string pointer */
602 _cups_strdup(const char *s
) /* I - String to duplicate */
604 char *t
; /* New string pointer */
605 size_t slen
; /* Length of string */
612 if ((t
= malloc(slen
+ 1)) == NULL
)
615 return (memcpy(t
, s
, slen
+ 1));
617 #endif /* !HAVE_STRDUP */
621 * '_cups_strcasecmp()' - Do a case-insensitive comparison.
624 int /* O - Result of comparison (-1, 0, or 1) */
625 _cups_strcasecmp(const char *s
, /* I - First string */
626 const char *t
) /* I - Second string */
628 while (*s
!= '\0' && *t
!= '\0')
630 if (_cups_tolower(*s
) < _cups_tolower(*t
))
632 else if (_cups_tolower(*s
) > _cups_tolower(*t
))
639 if (*s
== '\0' && *t
== '\0')
648 * '_cups_strncasecmp()' - Do a case-insensitive comparison on up to N chars.
651 int /* O - Result of comparison (-1, 0, or 1) */
652 _cups_strncasecmp(const char *s
, /* I - First string */
653 const char *t
, /* I - Second string */
654 size_t n
) /* I - Maximum number of characters to compare */
656 while (*s
!= '\0' && *t
!= '\0' && n
> 0)
658 if (_cups_tolower(*s
) < _cups_tolower(*t
))
660 else if (_cups_tolower(*s
) > _cups_tolower(*t
))
670 else if (*s
== '\0' && *t
== '\0')
681 * '_cups_strlcat()' - Safely concatenate two strings.
684 size_t /* O - Length of string */
685 _cups_strlcat(char *dst
, /* O - Destination string */
686 const char *src
, /* I - Source string */
687 size_t size
) /* I - Size of destination string buffer */
689 size_t srclen
; /* Length of source string */
690 size_t dstlen
; /* Length of destination string */
694 * Figure out how much room is left...
697 dstlen
= strlen(dst
);
701 return (dstlen
); /* No room, return immediately... */
704 * Figure out how much room is needed...
707 srclen
= strlen(src
);
710 * Copy the appropriate amount...
716 memmove(dst
+ dstlen
, src
, srclen
);
717 dst
[dstlen
+ srclen
] = '\0';
719 return (dstlen
+ srclen
);
721 #endif /* !HAVE_STRLCAT */
726 * '_cups_strlcpy()' - Safely copy two strings.
729 size_t /* O - Length of string */
730 _cups_strlcpy(char *dst
, /* O - Destination string */
731 const char *src
, /* I - Source string */
732 size_t size
) /* I - Size of destination string buffer */
734 size_t srclen
; /* Length of source string */
738 * Figure out how much room is needed...
743 srclen
= strlen(src
);
746 * Copy the appropriate amount...
752 memmove(dst
, src
, srclen
);
757 #endif /* !HAVE_STRLCPY */
761 * 'compare_sp_items()' - Compare two string pool items...
764 static int /* O - Result of comparison */
765 compare_sp_items(_cups_sp_item_t
*a
, /* I - First item */
766 _cups_sp_item_t
*b
) /* I - Second item */
768 return (strcmp(a
->str
, b
->str
));