cpython-lru_cache-weakref: Objects/stringlib/localeutil.h annotate

annotate Objects/stringlib/localeutil.h @ 58925:eecf1bef052d 2.6

Merged revisions 78207 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r78207 | ezio.melotti | 2010-02-17 01:26:09 +0200 (Wed, 17 Feb 2010) | 1 line #7930: fix stripid ........

author	Ezio Melotti <ezio.melotti@gmail.com>
date	Tue, 16 Feb 2010 23:29:44 +0000
parents	098173e844d1
children	e38335d4df91 c5e0d9beebf9 28096ed73153

rev	line source
46909 ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	1 /* stringlib: locale related helpers implementation */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	2
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	3 #ifndef STRINGLIB_LOCALEUTIL_H
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	4 #define STRINGLIB_LOCALEUTIL_H
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	5
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	6 #include <locale.h>
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	7
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	8 /**
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	9 * _Py_InsertThousandsGrouping:
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	10 * @buffer: A pointer to the start of a string.
48358 098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	11 * @n_buffer: The length of the string.
098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	12 * @n_digits: The number of digits in the string, in which we want
098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	13 * to put the grouping chars.
46909 ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	14 * @buf_size: The maximum size of the buffer pointed to by buffer.
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	15 * @count: If non-NULL, points to a variable that will receive the
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	16 * number of characters we need to insert (and no formatting
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	17 * will actually occur).
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	18 * @append_zero_char: If non-zero, put a trailing zero at the end of
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	19 * of the resulting string, if and only if we modified the
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	20 * string.
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	21 *
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	22 * Inserts thousand grouping characters (as defined in the current
48358 098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	23 * locale) into the string between buffer and buffer+n_digits. If
098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	24 * count is non-NULL, don't do any formatting, just count the number
098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	25 * of characters to insert. This is used by the caller to
098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	26 * appropriately resize the buffer, if needed. If count is non-NULL,
098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	27 * buffer can be NULL (it is not dereferenced at all in that case).
46909 ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	28 *
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	29 * Return value: 0 on error, else 1. Note that no error can occur if
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	30 * count is non-NULL.
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	31 *
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	32 * This name won't be used, the includer of this file should define
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	33 * it to be the actual function name, based on unicode or string.
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	34 **/
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	35 int
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	36 _Py_InsertThousandsGrouping(STRINGLIB_CHAR *buffer,
48358 098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	37 Py_ssize_t n_buffer,
098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	38 Py_ssize_t n_digits,
46909 ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	39 Py_ssize_t buf_size,
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	40 Py_ssize_t *count,
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	41 int append_zero_char)
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	42 {
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	43 struct lconv *locale_data = localeconv();
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	44 const char *grouping = locale_data->grouping;
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	45 const char *thousands_sep = locale_data->thousands_sep;
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	46 Py_ssize_t thousands_sep_len = strlen(thousands_sep);
48358 098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	47 STRINGLIB_CHAR pend = NULL; / current end of buffer */
098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	48 STRINGLIB_CHAR pmax = NULL; / max of buffer */
46909 ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	49 char current_grouping;
48358 098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	50 Py_ssize_t remaining = n_digits; /* Number of chars remaining to
098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	51 be looked at */
46909 ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	52
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	53 /* Initialize the character count, if we're just counting. */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	54 if (count)
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	55 *count = 0;
48358 098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	56 else {
098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	57 /* We're not just counting, we're modifying buffer */
098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	58 pend = buffer + n_buffer;
098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	59 pmax = buffer + buf_size;
098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	60 }
46909 ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	61
48358 098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	62 /* Starting at the end and working right-to-left, keep track of
46909 ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	63 what grouping needs to be added and insert that. */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	64 current_grouping = *grouping++;
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	65
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	66 /* If the first character is 0, perform no grouping at all. */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	67 if (current_grouping == 0)
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	68 return 1;
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	69
48358 098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	70 while (remaining > current_grouping) {
46909 ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	71 /* Always leave buffer and pend valid at the end of this
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	72 loop, since we might leave with a return statement. */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	73
48358 098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	74 remaining -= current_grouping;
46909 ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	75 if (count) {
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	76 /* We're only counting, not touching the memory. */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	77 *count += thousands_sep_len;
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	78 }
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	79 else {
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	80 /* Do the formatting. */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	81
48358 098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	82 STRINGLIB_CHAR *plast = buffer + remaining;
098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	83
46909 ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	84 /* Is there room to insert thousands_sep_len chars? */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	85 if (pmax - pend < thousands_sep_len)
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	86 /* No room. */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	87 return 0;
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	88
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	89 /* Move the rest of the string down. */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	90 memmove(plast + thousands_sep_len,
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	91 plast,
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	92 (pend - plast) * sizeof(STRINGLIB_CHAR));
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	93 /* Copy the thousands_sep chars into the buffer. */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	94 #if STRINGLIB_IS_UNICODE
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	95 /* Convert from the char's of the thousands_sep from
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	96 the locale into unicode. */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	97 {
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	98 Py_ssize_t i;
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	99 for (i = 0; i < thousands_sep_len; ++i)
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	100 plast[i] = thousands_sep[i];
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	101 }
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	102 #else
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	103 /* No conversion, just memcpy the thousands_sep. */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	104 memcpy(plast, thousands_sep, thousands_sep_len);
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	105 #endif
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	106 }
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	107
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	108 /* Adjust end pointer. */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	109 pend += thousands_sep_len;
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	110
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	111 /* Move to the next grouping character, unless we're
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	112 repeating (which is designated by a grouping of 0). */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	113 if (*grouping != 0) {
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	114 current_grouping = *grouping++;
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	115 if (current_grouping == CHAR_MAX)
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	116 /* We're done. */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	117 break;
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	118 }
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	119 }
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	120 if (append_zero_char) {
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	121 /* Append a zero character to mark the end of the string,
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	122 if there's room. */
48358 098173e844d1 Merged revisions 64491 via svnmerge from Eric Smith <eric@trueblade.com> parents: 46909 diff changeset	123 if (pend - (buffer + remaining) < 1)
46909 ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	124 /* No room, error. */
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	125 return 0;
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	126 *pend = 0;
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	127 }
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	128 return 1;
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	129 }
ef4ec968fdb6 Merged revisions 63078 via svnmerge from Eric Smith <eric@trueblade.com> parents: diff changeset	130 #endif /* STRINGLIB_LOCALEUTIL_H */

Mercurial > cpython-lru_cache-weakref

annotate Objects/stringlib/localeutil.h @ 58925:eecf1bef052d 2.6