diff options
Diffstat (limited to 'contrib/tools/python3/src/Python/formatter_unicode.c')
| -rw-r--r-- | contrib/tools/python3/src/Python/formatter_unicode.c | 1623 |
1 files changed, 0 insertions, 1623 deletions
diff --git a/contrib/tools/python3/src/Python/formatter_unicode.c b/contrib/tools/python3/src/Python/formatter_unicode.c deleted file mode 100644 index 38e5f69bfb..0000000000 --- a/contrib/tools/python3/src/Python/formatter_unicode.c +++ /dev/null @@ -1,1623 +0,0 @@ -/* implements the unicode (as opposed to string) version of the - built-in formatters for string, int, float. that is, the versions - of int.__float__, etc., that take and return unicode objects */ - -#include "Python.h" -#include "pycore_fileutils.h" // _Py_GetLocaleconvNumeric() -#include "pycore_long.h" // _PyLong_FormatWriter() -#include <locale.h> - -/* Raises an exception about an unknown presentation type for this - * type. */ - -static void -unknown_presentation_type(Py_UCS4 presentation_type, - const char* type_name) -{ - /* %c might be out-of-range, hence the two cases. */ - if (presentation_type > 32 && presentation_type < 128) - PyErr_Format(PyExc_ValueError, - "Unknown format code '%c' " - "for object of type '%.200s'", - (char)presentation_type, - type_name); - else - PyErr_Format(PyExc_ValueError, - "Unknown format code '\\x%x' " - "for object of type '%.200s'", - (unsigned int)presentation_type, - type_name); -} - -static void -invalid_thousands_separator_type(char specifier, Py_UCS4 presentation_type) -{ - assert(specifier == ',' || specifier == '_'); - if (presentation_type > 32 && presentation_type < 128) - PyErr_Format(PyExc_ValueError, - "Cannot specify '%c' with '%c'.", - specifier, (char)presentation_type); - else - PyErr_Format(PyExc_ValueError, - "Cannot specify '%c' with '\\x%x'.", - specifier, (unsigned int)presentation_type); -} - -static void -invalid_comma_and_underscore(void) -{ - PyErr_Format(PyExc_ValueError, "Cannot specify both ',' and '_'."); -} - -/* - get_integer consumes 0 or more decimal digit characters from an - input string, updates *result with the corresponding positive - integer, and returns the number of digits consumed. - - returns -1 on error. -*/ -static int -get_integer(PyObject *str, Py_ssize_t *ppos, Py_ssize_t end, - Py_ssize_t *result) -{ - Py_ssize_t accumulator, digitval, pos = *ppos; - int numdigits; - int kind = PyUnicode_KIND(str); - const void *data = PyUnicode_DATA(str); - - accumulator = numdigits = 0; - for (; pos < end; pos++, numdigits++) { - digitval = Py_UNICODE_TODECIMAL(PyUnicode_READ(kind, data, pos)); - if (digitval < 0) - break; - /* - Detect possible overflow before it happens: - - accumulator * 10 + digitval > PY_SSIZE_T_MAX if and only if - accumulator > (PY_SSIZE_T_MAX - digitval) / 10. - */ - if (accumulator > (PY_SSIZE_T_MAX - digitval) / 10) { - PyErr_Format(PyExc_ValueError, - "Too many decimal digits in format string"); - *ppos = pos; - return -1; - } - accumulator = accumulator * 10 + digitval; - } - *ppos = pos; - *result = accumulator; - return numdigits; -} - -/************************************************************************/ -/*********** standard format specifier parsing **************************/ -/************************************************************************/ - -/* returns true if this character is a specifier alignment token */ -Py_LOCAL_INLINE(int) -is_alignment_token(Py_UCS4 c) -{ - switch (c) { - case '<': case '>': case '=': case '^': - return 1; - default: - return 0; - } -} - -/* returns true if this character is a sign element */ -Py_LOCAL_INLINE(int) -is_sign_element(Py_UCS4 c) -{ - switch (c) { - case ' ': case '+': case '-': - return 1; - default: - return 0; - } -} - -/* Locale type codes. LT_NO_LOCALE must be zero. */ -enum LocaleType { - LT_NO_LOCALE = 0, - LT_DEFAULT_LOCALE = ',', - LT_UNDERSCORE_LOCALE = '_', - LT_UNDER_FOUR_LOCALE, - LT_CURRENT_LOCALE -}; - -typedef struct { - Py_UCS4 fill_char; - Py_UCS4 align; - int alternate; - int no_neg_0; - Py_UCS4 sign; - Py_ssize_t width; - enum LocaleType thousands_separators; - Py_ssize_t precision; - Py_UCS4 type; -} InternalFormatSpec; - - -/* - ptr points to the start of the format_spec, end points just past its end. - fills in format with the parsed information. - returns 1 on success, 0 on failure. - if failure, sets the exception -*/ -static int -parse_internal_render_format_spec(PyObject *obj, - PyObject *format_spec, - Py_ssize_t start, Py_ssize_t end, - InternalFormatSpec *format, - char default_type, - char default_align) -{ - Py_ssize_t pos = start; - int kind = PyUnicode_KIND(format_spec); - const void *data = PyUnicode_DATA(format_spec); - /* end-pos is used throughout this code to specify the length of - the input string */ -#define READ_spec(index) PyUnicode_READ(kind, data, index) - - Py_ssize_t consumed; - int align_specified = 0; - int fill_char_specified = 0; - - format->fill_char = ' '; - format->align = default_align; - format->alternate = 0; - format->no_neg_0 = 0; - format->sign = '\0'; - format->width = -1; - format->thousands_separators = LT_NO_LOCALE; - format->precision = -1; - format->type = default_type; - - /* If the second char is an alignment token, - then parse the fill char */ - if (end-pos >= 2 && is_alignment_token(READ_spec(pos+1))) { - format->align = READ_spec(pos+1); - format->fill_char = READ_spec(pos); - fill_char_specified = 1; - align_specified = 1; - pos += 2; - } - else if (end-pos >= 1 && is_alignment_token(READ_spec(pos))) { - format->align = READ_spec(pos); - align_specified = 1; - ++pos; - } - - /* Parse the various sign options */ - if (end-pos >= 1 && is_sign_element(READ_spec(pos))) { - format->sign = READ_spec(pos); - ++pos; - } - - /* If the next character is z, request coercion of negative 0. - Applies only to floats. */ - if (end-pos >= 1 && READ_spec(pos) == 'z') { - format->no_neg_0 = 1; - ++pos; - } - - /* If the next character is #, we're in alternate mode. This only - applies to integers. */ - if (end-pos >= 1 && READ_spec(pos) == '#') { - format->alternate = 1; - ++pos; - } - - /* The special case for 0-padding (backwards compat) */ - if (!fill_char_specified && end-pos >= 1 && READ_spec(pos) == '0') { - format->fill_char = '0'; - if (!align_specified && default_align == '>') { - format->align = '='; - } - ++pos; - } - - consumed = get_integer(format_spec, &pos, end, &format->width); - if (consumed == -1) - /* Overflow error. Exception already set. */ - return 0; - - /* If consumed is 0, we didn't consume any characters for the - width. In that case, reset the width to -1, because - get_integer() will have set it to zero. -1 is how we record - that the width wasn't specified. */ - if (consumed == 0) - format->width = -1; - - /* Comma signifies add thousands separators */ - if (end-pos && READ_spec(pos) == ',') { - format->thousands_separators = LT_DEFAULT_LOCALE; - ++pos; - } - /* Underscore signifies add thousands separators */ - if (end-pos && READ_spec(pos) == '_') { - if (format->thousands_separators != LT_NO_LOCALE) { - invalid_comma_and_underscore(); - return 0; - } - format->thousands_separators = LT_UNDERSCORE_LOCALE; - ++pos; - } - if (end-pos && READ_spec(pos) == ',') { - if (format->thousands_separators == LT_UNDERSCORE_LOCALE) { - invalid_comma_and_underscore(); - return 0; - } - } - - /* Parse field precision */ - if (end-pos && READ_spec(pos) == '.') { - ++pos; - - consumed = get_integer(format_spec, &pos, end, &format->precision); - if (consumed == -1) - /* Overflow error. Exception already set. */ - return 0; - - /* Not having a precision after a dot is an error. */ - if (consumed == 0) { - PyErr_Format(PyExc_ValueError, - "Format specifier missing precision"); - return 0; - } - - } - - /* Finally, parse the type field. */ - - if (end-pos > 1) { - /* More than one char remains, so this is an invalid format - specifier. */ - /* Create a temporary object that contains the format spec we're - operating on. It's format_spec[start:end] (in Python syntax). */ - PyObject* actual_format_spec = PyUnicode_FromKindAndData(kind, - (char*)data + kind*start, - end-start); - if (actual_format_spec != NULL) { - PyErr_Format(PyExc_ValueError, - "Invalid format specifier '%U' for object of type '%.200s'", - actual_format_spec, Py_TYPE(obj)->tp_name); - Py_DECREF(actual_format_spec); - } - return 0; - } - - if (end-pos == 1) { - format->type = READ_spec(pos); - ++pos; - } - - /* Do as much validating as we can, just by looking at the format - specifier. Do not take into account what type of formatting - we're doing (int, float, string). */ - - if (format->thousands_separators) { - switch (format->type) { - case 'd': - case 'e': - case 'f': - case 'g': - case 'E': - case 'G': - case '%': - case 'F': - case '\0': - /* These are allowed. See PEP 378.*/ - break; - case 'b': - case 'o': - case 'x': - case 'X': - /* Underscores are allowed in bin/oct/hex. See PEP 515. */ - if (format->thousands_separators == LT_UNDERSCORE_LOCALE) { - /* Every four digits, not every three, in bin/oct/hex. */ - format->thousands_separators = LT_UNDER_FOUR_LOCALE; - break; - } - /* fall through */ - default: - invalid_thousands_separator_type(format->thousands_separators, format->type); - return 0; - } - } - - assert (format->align <= 127); - assert (format->sign <= 127); - return 1; -} - -/* Calculate the padding needed. */ -static void -calc_padding(Py_ssize_t nchars, Py_ssize_t width, Py_UCS4 align, - Py_ssize_t *n_lpadding, Py_ssize_t *n_rpadding, - Py_ssize_t *n_total) -{ - if (width >= 0) { - if (nchars > width) - *n_total = nchars; - else - *n_total = width; - } - else { - /* not specified, use all of the chars and no more */ - *n_total = nchars; - } - - /* Figure out how much leading space we need, based on the - aligning */ - if (align == '>') - *n_lpadding = *n_total - nchars; - else if (align == '^') - *n_lpadding = (*n_total - nchars) / 2; - else if (align == '<' || align == '=') - *n_lpadding = 0; - else { - /* We should never have an unspecified alignment. */ - Py_UNREACHABLE(); - } - - *n_rpadding = *n_total - nchars - *n_lpadding; -} - -/* Do the padding, and return a pointer to where the caller-supplied - content goes. */ -static int -fill_padding(_PyUnicodeWriter *writer, - Py_ssize_t nchars, - Py_UCS4 fill_char, Py_ssize_t n_lpadding, - Py_ssize_t n_rpadding) -{ - Py_ssize_t pos; - - /* Pad on left. */ - if (n_lpadding) { - pos = writer->pos; - _PyUnicode_FastFill(writer->buffer, pos, n_lpadding, fill_char); - } - - /* Pad on right. */ - if (n_rpadding) { - pos = writer->pos + nchars + n_lpadding; - _PyUnicode_FastFill(writer->buffer, pos, n_rpadding, fill_char); - } - - /* Pointer to the user content. */ - writer->pos += n_lpadding; - return 0; -} - -/************************************************************************/ -/*********** common routines for numeric formatting *********************/ -/************************************************************************/ - -/* Locale info needed for formatting integers and the part of floats - before and including the decimal. Note that locales only support - 8-bit chars, not unicode. */ -typedef struct { - PyObject *decimal_point; - PyObject *thousands_sep; - const char *grouping; - char *grouping_buffer; -} LocaleInfo; - -#define LocaleInfo_STATIC_INIT {0, 0, 0, 0} - -/* describes the layout for an integer, see the comment in - calc_number_widths() for details */ -typedef struct { - Py_ssize_t n_lpadding; - Py_ssize_t n_prefix; - Py_ssize_t n_spadding; - Py_ssize_t n_rpadding; - char sign; - Py_ssize_t n_sign; /* number of digits needed for sign (0/1) */ - Py_ssize_t n_grouped_digits; /* Space taken up by the digits, including - any grouping chars. */ - Py_ssize_t n_decimal; /* 0 if only an integer */ - Py_ssize_t n_remainder; /* Digits in decimal and/or exponent part, - excluding the decimal itself, if - present. */ - - /* These 2 are not the widths of fields, but are needed by - STRINGLIB_GROUPING. */ - Py_ssize_t n_digits; /* The number of digits before a decimal - or exponent. */ - Py_ssize_t n_min_width; /* The min_width we used when we computed - the n_grouped_digits width. */ -} NumberFieldWidths; - - -/* Given a number of the form: - digits[remainder] - where ptr points to the start and end points to the end, find where - the integer part ends. This could be a decimal, an exponent, both, - or neither. - If a decimal point is present, set *has_decimal and increment - remainder beyond it. - Results are undefined (but shouldn't crash) for improperly - formatted strings. -*/ -static void -parse_number(PyObject *s, Py_ssize_t pos, Py_ssize_t end, - Py_ssize_t *n_remainder, int *has_decimal) -{ - Py_ssize_t remainder; - int kind = PyUnicode_KIND(s); - const void *data = PyUnicode_DATA(s); - - while (pos<end && Py_ISDIGIT(PyUnicode_READ(kind, data, pos))) - ++pos; - remainder = pos; - - /* Does remainder start with a decimal point? */ - *has_decimal = pos<end && PyUnicode_READ(kind, data, remainder) == '.'; - - /* Skip the decimal point. */ - if (*has_decimal) - remainder++; - - *n_remainder = end - remainder; -} - -/* not all fields of format are used. for example, precision is - unused. should this take discrete params in order to be more clear - about what it does? or is passing a single format parameter easier - and more efficient enough to justify a little obfuscation? - Return -1 on error. */ -static Py_ssize_t -calc_number_widths(NumberFieldWidths *spec, Py_ssize_t n_prefix, - Py_UCS4 sign_char, Py_ssize_t n_start, - Py_ssize_t n_end, Py_ssize_t n_remainder, - int has_decimal, const LocaleInfo *locale, - const InternalFormatSpec *format, Py_UCS4 *maxchar) -{ - Py_ssize_t n_non_digit_non_padding; - Py_ssize_t n_padding; - - spec->n_digits = n_end - n_start - n_remainder - (has_decimal?1:0); - spec->n_lpadding = 0; - spec->n_prefix = n_prefix; - spec->n_decimal = has_decimal ? PyUnicode_GET_LENGTH(locale->decimal_point) : 0; - spec->n_remainder = n_remainder; - spec->n_spadding = 0; - spec->n_rpadding = 0; - spec->sign = '\0'; - spec->n_sign = 0; - - /* the output will look like: - | | - | <lpadding> <sign> <prefix> <spadding> <grouped_digits> <decimal> <remainder> <rpadding> | - | | - - sign is computed from format->sign and the actual - sign of the number - - prefix is given (it's for the '0x' prefix) - - digits is already known - - the total width is either given, or computed from the - actual digits - - only one of lpadding, spadding, and rpadding can be non-zero, - and it's calculated from the width and other fields - */ - - /* compute the various parts we're going to write */ - switch (format->sign) { - case '+': - /* always put a + or - */ - spec->n_sign = 1; - spec->sign = (sign_char == '-' ? '-' : '+'); - break; - case ' ': - spec->n_sign = 1; - spec->sign = (sign_char == '-' ? '-' : ' '); - break; - default: - /* Not specified, or the default (-) */ - if (sign_char == '-') { - spec->n_sign = 1; - spec->sign = '-'; - } - } - - /* The number of chars used for non-digits and non-padding. */ - n_non_digit_non_padding = spec->n_sign + spec->n_prefix + spec->n_decimal + - spec->n_remainder; - - /* min_width can go negative, that's okay. format->width == -1 means - we don't care. */ - if (format->fill_char == '0' && format->align == '=') - spec->n_min_width = format->width - n_non_digit_non_padding; - else - spec->n_min_width = 0; - - if (spec->n_digits == 0) - /* This case only occurs when using 'c' formatting, we need - to special case it because the grouping code always wants - to have at least one character. */ - spec->n_grouped_digits = 0; - else { - Py_UCS4 grouping_maxchar; - spec->n_grouped_digits = _PyUnicode_InsertThousandsGrouping( - NULL, 0, - NULL, 0, spec->n_digits, - spec->n_min_width, - locale->grouping, locale->thousands_sep, &grouping_maxchar); - if (spec->n_grouped_digits == -1) { - return -1; - } - *maxchar = Py_MAX(*maxchar, grouping_maxchar); - } - - /* Given the desired width and the total of digit and non-digit - space we consume, see if we need any padding. format->width can - be negative (meaning no padding), but this code still works in - that case. */ - n_padding = format->width - - (n_non_digit_non_padding + spec->n_grouped_digits); - if (n_padding > 0) { - /* Some padding is needed. Determine if it's left, space, or right. */ - switch (format->align) { - case '<': - spec->n_rpadding = n_padding; - break; - case '^': - spec->n_lpadding = n_padding / 2; - spec->n_rpadding = n_padding - spec->n_lpadding; - break; - case '=': - spec->n_spadding = n_padding; - break; - case '>': - spec->n_lpadding = n_padding; - break; - default: - /* Shouldn't get here */ - Py_UNREACHABLE(); - } - } - - if (spec->n_lpadding || spec->n_spadding || spec->n_rpadding) - *maxchar = Py_MAX(*maxchar, format->fill_char); - - if (spec->n_decimal) - *maxchar = Py_MAX(*maxchar, PyUnicode_MAX_CHAR_VALUE(locale->decimal_point)); - - return spec->n_lpadding + spec->n_sign + spec->n_prefix + - spec->n_spadding + spec->n_grouped_digits + spec->n_decimal + - spec->n_remainder + spec->n_rpadding; -} - -/* Fill in the digit parts of a number's string representation, - as determined in calc_number_widths(). - Return -1 on error, or 0 on success. */ -static int -fill_number(_PyUnicodeWriter *writer, const NumberFieldWidths *spec, - PyObject *digits, Py_ssize_t d_start, - PyObject *prefix, Py_ssize_t p_start, - Py_UCS4 fill_char, - LocaleInfo *locale, int toupper) -{ - /* Used to keep track of digits, decimal, and remainder. */ - Py_ssize_t d_pos = d_start; - const int kind = writer->kind; - const void *data = writer->data; - Py_ssize_t r; - - if (spec->n_lpadding) { - _PyUnicode_FastFill(writer->buffer, - writer->pos, spec->n_lpadding, fill_char); - writer->pos += spec->n_lpadding; - } - if (spec->n_sign == 1) { - PyUnicode_WRITE(kind, data, writer->pos, spec->sign); - writer->pos++; - } - if (spec->n_prefix) { - _PyUnicode_FastCopyCharacters(writer->buffer, writer->pos, - prefix, p_start, - spec->n_prefix); - if (toupper) { - Py_ssize_t t; - for (t = 0; t < spec->n_prefix; t++) { - Py_UCS4 c = PyUnicode_READ(kind, data, writer->pos + t); - c = Py_TOUPPER(c); - assert (c <= 127); - PyUnicode_WRITE(kind, data, writer->pos + t, c); - } - } - writer->pos += spec->n_prefix; - } - if (spec->n_spadding) { - _PyUnicode_FastFill(writer->buffer, - writer->pos, spec->n_spadding, fill_char); - writer->pos += spec->n_spadding; - } - - /* Only for type 'c' special case, it has no digits. */ - if (spec->n_digits != 0) { - /* Fill the digits with InsertThousandsGrouping. */ - r = _PyUnicode_InsertThousandsGrouping( - writer, spec->n_grouped_digits, - digits, d_pos, spec->n_digits, - spec->n_min_width, - locale->grouping, locale->thousands_sep, NULL); - if (r == -1) - return -1; - assert(r == spec->n_grouped_digits); - d_pos += spec->n_digits; - } - if (toupper) { - Py_ssize_t t; - for (t = 0; t < spec->n_grouped_digits; t++) { - Py_UCS4 c = PyUnicode_READ(kind, data, writer->pos + t); - c = Py_TOUPPER(c); - if (c > 127) { - PyErr_SetString(PyExc_SystemError, "non-ascii grouped digit"); - return -1; - } - PyUnicode_WRITE(kind, data, writer->pos + t, c); - } - } - writer->pos += spec->n_grouped_digits; - - if (spec->n_decimal) { - _PyUnicode_FastCopyCharacters( - writer->buffer, writer->pos, - locale->decimal_point, 0, spec->n_decimal); - writer->pos += spec->n_decimal; - d_pos += 1; - } - - if (spec->n_remainder) { - _PyUnicode_FastCopyCharacters( - writer->buffer, writer->pos, - digits, d_pos, spec->n_remainder); - writer->pos += spec->n_remainder; - /* d_pos += spec->n_remainder; */ - } - - if (spec->n_rpadding) { - _PyUnicode_FastFill(writer->buffer, - writer->pos, spec->n_rpadding, - fill_char); - writer->pos += spec->n_rpadding; - } - return 0; -} - -static const char no_grouping[1] = {CHAR_MAX}; - -/* Find the decimal point character(s?), thousands_separator(s?), and - grouping description, either for the current locale if type is - LT_CURRENT_LOCALE, a hard-coded locale if LT_DEFAULT_LOCALE or - LT_UNDERSCORE_LOCALE/LT_UNDER_FOUR_LOCALE, or none if LT_NO_LOCALE. */ -static int -get_locale_info(enum LocaleType type, LocaleInfo *locale_info) -{ - switch (type) { - case LT_CURRENT_LOCALE: { - struct lconv *lc = localeconv(); - if (_Py_GetLocaleconvNumeric(lc, - &locale_info->decimal_point, - &locale_info->thousands_sep) < 0) { - return -1; - } - - /* localeconv() grouping can become a dangling pointer or point - to a different string if another thread calls localeconv() during - the string formatting. Copy the string to avoid this risk. */ - locale_info->grouping_buffer = _PyMem_Strdup(lc->grouping); - if (locale_info->grouping_buffer == NULL) { - PyErr_NoMemory(); - return -1; - } - locale_info->grouping = locale_info->grouping_buffer; - break; - } - case LT_DEFAULT_LOCALE: - case LT_UNDERSCORE_LOCALE: - case LT_UNDER_FOUR_LOCALE: - locale_info->decimal_point = PyUnicode_FromOrdinal('.'); - locale_info->thousands_sep = PyUnicode_FromOrdinal( - type == LT_DEFAULT_LOCALE ? ',' : '_'); - if (!locale_info->decimal_point || !locale_info->thousands_sep) - return -1; - if (type != LT_UNDER_FOUR_LOCALE) - locale_info->grouping = "\3"; /* Group every 3 characters. The - (implicit) trailing 0 means repeat - infinitely. */ - else - locale_info->grouping = "\4"; /* Bin/oct/hex group every four. */ - break; - case LT_NO_LOCALE: - locale_info->decimal_point = PyUnicode_FromOrdinal('.'); - locale_info->thousands_sep = PyUnicode_New(0, 0); - if (!locale_info->decimal_point || !locale_info->thousands_sep) - return -1; - locale_info->grouping = no_grouping; - break; - } - return 0; -} - -static void -free_locale_info(LocaleInfo *locale_info) -{ - Py_XDECREF(locale_info->decimal_point); - Py_XDECREF(locale_info->thousands_sep); - PyMem_Free(locale_info->grouping_buffer); -} - -/************************************************************************/ -/*********** string formatting ******************************************/ -/************************************************************************/ - -static int -format_string_internal(PyObject *value, const InternalFormatSpec *format, - _PyUnicodeWriter *writer) -{ - Py_ssize_t lpad; - Py_ssize_t rpad; - Py_ssize_t total; - Py_ssize_t len; - int result = -1; - Py_UCS4 maxchar; - - assert(PyUnicode_IS_READY(value)); - len = PyUnicode_GET_LENGTH(value); - - /* sign is not allowed on strings */ - if (format->sign != '\0') { - if (format->sign == ' ') { - PyErr_SetString(PyExc_ValueError, - "Space not allowed in string format specifier"); - } - else { - PyErr_SetString(PyExc_ValueError, - "Sign not allowed in string format specifier"); - } - goto done; - } - - /* negative 0 coercion is not allowed on strings */ - if (format->no_neg_0) { - PyErr_SetString(PyExc_ValueError, - "Negative zero coercion (z) not allowed in string format " - "specifier"); - goto done; - } - - /* alternate is not allowed on strings */ - if (format->alternate) { - PyErr_SetString(PyExc_ValueError, - "Alternate form (#) not allowed in string format " - "specifier"); - goto done; - } - - /* '=' alignment not allowed on strings */ - if (format->align == '=') { - PyErr_SetString(PyExc_ValueError, - "'=' alignment not allowed " - "in string format specifier"); - goto done; - } - - if ((format->width == -1 || format->width <= len) - && (format->precision == -1 || format->precision >= len)) { - /* Fast path */ - return _PyUnicodeWriter_WriteStr(writer, value); - } - - /* if precision is specified, output no more that format.precision - characters */ - if (format->precision >= 0 && len >= format->precision) { - len = format->precision; - } - - calc_padding(len, format->width, format->align, &lpad, &rpad, &total); - - maxchar = writer->maxchar; - if (lpad != 0 || rpad != 0) - maxchar = Py_MAX(maxchar, format->fill_char); - if (PyUnicode_MAX_CHAR_VALUE(value) > maxchar) { - Py_UCS4 valmaxchar = _PyUnicode_FindMaxChar(value, 0, len); - maxchar = Py_MAX(maxchar, valmaxchar); - } - - /* allocate the resulting string */ - if (_PyUnicodeWriter_Prepare(writer, total, maxchar) == -1) - goto done; - - /* Write into that space. First the padding. */ - result = fill_padding(writer, len, format->fill_char, lpad, rpad); - if (result == -1) - goto done; - - /* Then the source string. */ - if (len) { - _PyUnicode_FastCopyCharacters(writer->buffer, writer->pos, - value, 0, len); - } - writer->pos += (len + rpad); - result = 0; - -done: - return result; -} - - -/************************************************************************/ -/*********** long formatting ********************************************/ -/************************************************************************/ - -static int -format_long_internal(PyObject *value, const InternalFormatSpec *format, - _PyUnicodeWriter *writer) -{ - int result = -1; - Py_UCS4 maxchar = 127; - PyObject *tmp = NULL; - Py_ssize_t inumeric_chars; - Py_UCS4 sign_char = '\0'; - Py_ssize_t n_digits; /* count of digits need from the computed - string */ - Py_ssize_t n_remainder = 0; /* Used only for 'c' formatting, which - produces non-digits */ - Py_ssize_t n_prefix = 0; /* Count of prefix chars, (e.g., '0x') */ - Py_ssize_t n_total; - Py_ssize_t prefix = 0; - NumberFieldWidths spec; - long x; - - /* Locale settings, either from the actual locale or - from a hard-code pseudo-locale */ - LocaleInfo locale = LocaleInfo_STATIC_INIT; - - /* no precision allowed on integers */ - if (format->precision != -1) { - PyErr_SetString(PyExc_ValueError, - "Precision not allowed in integer format specifier"); - goto done; - } - /* no negative zero coercion on integers */ - if (format->no_neg_0) { - PyErr_SetString(PyExc_ValueError, - "Negative zero coercion (z) not allowed in integer" - " format specifier"); - goto done; - } - - /* special case for character formatting */ - if (format->type == 'c') { - /* error to specify a sign */ - if (format->sign != '\0') { - PyErr_SetString(PyExc_ValueError, - "Sign not allowed with integer" - " format specifier 'c'"); - goto done; - } - /* error to request alternate format */ - if (format->alternate) { - PyErr_SetString(PyExc_ValueError, - "Alternate form (#) not allowed with integer" - " format specifier 'c'"); - goto done; - } - - /* taken from unicodeobject.c formatchar() */ - /* Integer input truncated to a character */ - x = PyLong_AsLong(value); - if (x == -1 && PyErr_Occurred()) - goto done; - if (x < 0 || x > 0x10ffff) { - PyErr_SetString(PyExc_OverflowError, - "%c arg not in range(0x110000)"); - goto done; - } - tmp = PyUnicode_FromOrdinal(x); - inumeric_chars = 0; - n_digits = 1; - maxchar = Py_MAX(maxchar, (Py_UCS4)x); - - /* As a sort-of hack, we tell calc_number_widths that we only - have "remainder" characters. calc_number_widths thinks - these are characters that don't get formatted, only copied - into the output string. We do this for 'c' formatting, - because the characters are likely to be non-digits. */ - n_remainder = 1; - } - else { - int base; - int leading_chars_to_skip = 0; /* Number of characters added by - PyNumber_ToBase that we want to - skip over. */ - - /* Compute the base and how many characters will be added by - PyNumber_ToBase */ - switch (format->type) { - case 'b': - base = 2; - leading_chars_to_skip = 2; /* 0b */ - break; - case 'o': - base = 8; - leading_chars_to_skip = 2; /* 0o */ - break; - case 'x': - case 'X': - base = 16; - leading_chars_to_skip = 2; /* 0x */ - break; - default: /* shouldn't be needed, but stops a compiler warning */ - case 'd': - case 'n': - base = 10; - break; - } - - if (format->sign != '+' && format->sign != ' ' - && format->width == -1 - && format->type != 'X' && format->type != 'n' - && !format->thousands_separators - && PyLong_CheckExact(value)) - { - /* Fast path */ - return _PyLong_FormatWriter(writer, value, base, format->alternate); - } - - /* The number of prefix chars is the same as the leading - chars to skip */ - if (format->alternate) - n_prefix = leading_chars_to_skip; - - /* Do the hard part, converting to a string in a given base */ - tmp = _PyLong_Format(value, base); - if (tmp == NULL || PyUnicode_READY(tmp) == -1) - goto done; - - inumeric_chars = 0; - n_digits = PyUnicode_GET_LENGTH(tmp); - - prefix = inumeric_chars; - - /* Is a sign character present in the output? If so, remember it - and skip it */ - if (PyUnicode_READ_CHAR(tmp, inumeric_chars) == '-') { - sign_char = '-'; - ++prefix; - ++leading_chars_to_skip; - } - - /* Skip over the leading chars (0x, 0b, etc.) */ - n_digits -= leading_chars_to_skip; - inumeric_chars += leading_chars_to_skip; - } - - /* Determine the grouping, separator, and decimal point, if any. */ - if (get_locale_info(format->type == 'n' ? LT_CURRENT_LOCALE : - format->thousands_separators, - &locale) == -1) - goto done; - - /* Calculate how much memory we'll need. */ - n_total = calc_number_widths(&spec, n_prefix, sign_char, inumeric_chars, - inumeric_chars + n_digits, n_remainder, 0, - &locale, format, &maxchar); - if (n_total == -1) { - goto done; - } - - /* Allocate the memory. */ - if (_PyUnicodeWriter_Prepare(writer, n_total, maxchar) == -1) - goto done; - - /* Populate the memory. */ - result = fill_number(writer, &spec, - tmp, inumeric_chars, - tmp, prefix, format->fill_char, - &locale, format->type == 'X'); - -done: - Py_XDECREF(tmp); - free_locale_info(&locale); - return result; -} - -/************************************************************************/ -/*********** float formatting *******************************************/ -/************************************************************************/ - -/* much of this is taken from unicodeobject.c */ -static int -format_float_internal(PyObject *value, - const InternalFormatSpec *format, - _PyUnicodeWriter *writer) -{ - char *buf = NULL; /* buffer returned from PyOS_double_to_string */ - Py_ssize_t n_digits; - Py_ssize_t n_remainder; - Py_ssize_t n_total; - int has_decimal; - double val; - int precision, default_precision = 6; - Py_UCS4 type = format->type; - int add_pct = 0; - Py_ssize_t index; - NumberFieldWidths spec; - int flags = 0; - int result = -1; - Py_UCS4 maxchar = 127; - Py_UCS4 sign_char = '\0'; - int float_type; /* Used to see if we have a nan, inf, or regular float. */ - PyObject *unicode_tmp = NULL; - - /* Locale settings, either from the actual locale or - from a hard-code pseudo-locale */ - LocaleInfo locale = LocaleInfo_STATIC_INIT; - - if (format->precision > INT_MAX) { - PyErr_SetString(PyExc_ValueError, "precision too big"); - goto done; - } - precision = (int)format->precision; - - if (format->alternate) - flags |= Py_DTSF_ALT; - if (format->no_neg_0) - flags |= Py_DTSF_NO_NEG_0; - - if (type == '\0') { - /* Omitted type specifier. Behaves in the same way as repr(x) - and str(x) if no precision is given, else like 'g', but with - at least one digit after the decimal point. */ - flags |= Py_DTSF_ADD_DOT_0; - type = 'r'; - default_precision = 0; - } - - if (type == 'n') - /* 'n' is the same as 'g', except for the locale used to - format the result. We take care of that later. */ - type = 'g'; - - val = PyFloat_AsDouble(value); - if (val == -1.0 && PyErr_Occurred()) - goto done; - - if (type == '%') { - type = 'f'; - val *= 100; - add_pct = 1; - } - - if (precision < 0) - precision = default_precision; - else if (type == 'r') - type = 'g'; - - /* Cast "type", because if we're in unicode we need to pass an - 8-bit char. This is safe, because we've restricted what "type" - can be. */ - buf = PyOS_double_to_string(val, (char)type, precision, flags, - &float_type); - if (buf == NULL) - goto done; - n_digits = strlen(buf); - - if (add_pct) { - /* We know that buf has a trailing zero (since we just called - strlen() on it), and we don't use that fact any more. So we - can just write over the trailing zero. */ - buf[n_digits] = '%'; - n_digits += 1; - } - - if (format->sign != '+' && format->sign != ' ' - && format->width == -1 - && format->type != 'n' - && !format->thousands_separators) - { - /* Fast path */ - result = _PyUnicodeWriter_WriteASCIIString(writer, buf, n_digits); - PyMem_Free(buf); - return result; - } - - /* Since there is no unicode version of PyOS_double_to_string, - just use the 8 bit version and then convert to unicode. */ - unicode_tmp = _PyUnicode_FromASCII(buf, n_digits); - PyMem_Free(buf); - if (unicode_tmp == NULL) - goto done; - - /* Is a sign character present in the output? If so, remember it - and skip it */ - index = 0; - if (PyUnicode_READ_CHAR(unicode_tmp, index) == '-') { - sign_char = '-'; - ++index; - --n_digits; - } - - /* Determine if we have any "remainder" (after the digits, might include - decimal or exponent or both (or neither)) */ - parse_number(unicode_tmp, index, index + n_digits, &n_remainder, &has_decimal); - - /* Determine the grouping, separator, and decimal point, if any. */ - if (get_locale_info(format->type == 'n' ? LT_CURRENT_LOCALE : - format->thousands_separators, - &locale) == -1) - goto done; - - /* Calculate how much memory we'll need. */ - n_total = calc_number_widths(&spec, 0, sign_char, index, - index + n_digits, n_remainder, has_decimal, - &locale, format, &maxchar); - if (n_total == -1) { - goto done; - } - - /* Allocate the memory. */ - if (_PyUnicodeWriter_Prepare(writer, n_total, maxchar) == -1) - goto done; - - /* Populate the memory. */ - result = fill_number(writer, &spec, - unicode_tmp, index, - NULL, 0, format->fill_char, - &locale, 0); - -done: - Py_XDECREF(unicode_tmp); - free_locale_info(&locale); - return result; -} - -/************************************************************************/ -/*********** complex formatting *****************************************/ -/************************************************************************/ - -static int -format_complex_internal(PyObject *value, - const InternalFormatSpec *format, - _PyUnicodeWriter *writer) -{ - double re; - double im; - char *re_buf = NULL; /* buffer returned from PyOS_double_to_string */ - char *im_buf = NULL; /* buffer returned from PyOS_double_to_string */ - - InternalFormatSpec tmp_format = *format; - Py_ssize_t n_re_digits; - Py_ssize_t n_im_digits; - Py_ssize_t n_re_remainder; - Py_ssize_t n_im_remainder; - Py_ssize_t n_re_total; - Py_ssize_t n_im_total; - int re_has_decimal; - int im_has_decimal; - int precision, default_precision = 6; - Py_UCS4 type = format->type; - Py_ssize_t i_re; - Py_ssize_t i_im; - NumberFieldWidths re_spec; - NumberFieldWidths im_spec; - int flags = 0; - int result = -1; - Py_UCS4 maxchar = 127; - int rkind; - void *rdata; - Py_UCS4 re_sign_char = '\0'; - Py_UCS4 im_sign_char = '\0'; - int re_float_type; /* Used to see if we have a nan, inf, or regular float. */ - int im_float_type; - int add_parens = 0; - int skip_re = 0; - Py_ssize_t lpad; - Py_ssize_t rpad; - Py_ssize_t total; - PyObject *re_unicode_tmp = NULL; - PyObject *im_unicode_tmp = NULL; - - /* Locale settings, either from the actual locale or - from a hard-code pseudo-locale */ - LocaleInfo locale = LocaleInfo_STATIC_INIT; - - if (format->precision > INT_MAX) { - PyErr_SetString(PyExc_ValueError, "precision too big"); - goto done; - } - precision = (int)format->precision; - - /* Zero padding is not allowed. */ - if (format->fill_char == '0') { - PyErr_SetString(PyExc_ValueError, - "Zero padding is not allowed in complex format " - "specifier"); - goto done; - } - - /* Neither is '=' alignment . */ - if (format->align == '=') { - PyErr_SetString(PyExc_ValueError, - "'=' alignment flag is not allowed in complex format " - "specifier"); - goto done; - } - - re = PyComplex_RealAsDouble(value); - if (re == -1.0 && PyErr_Occurred()) - goto done; - im = PyComplex_ImagAsDouble(value); - if (im == -1.0 && PyErr_Occurred()) - goto done; - - if (format->alternate) - flags |= Py_DTSF_ALT; - if (format->no_neg_0) - flags |= Py_DTSF_NO_NEG_0; - - if (type == '\0') { - /* Omitted type specifier. Should be like str(self). */ - type = 'r'; - default_precision = 0; - if (re == 0.0 && copysign(1.0, re) == 1.0) - skip_re = 1; - else - add_parens = 1; - } - - if (type == 'n') - /* 'n' is the same as 'g', except for the locale used to - format the result. We take care of that later. */ - type = 'g'; - - if (precision < 0) - precision = default_precision; - else if (type == 'r') - type = 'g'; - - /* Cast "type", because if we're in unicode we need to pass an - 8-bit char. This is safe, because we've restricted what "type" - can be. */ - re_buf = PyOS_double_to_string(re, (char)type, precision, flags, - &re_float_type); - if (re_buf == NULL) - goto done; - im_buf = PyOS_double_to_string(im, (char)type, precision, flags, - &im_float_type); - if (im_buf == NULL) - goto done; - - n_re_digits = strlen(re_buf); - n_im_digits = strlen(im_buf); - - /* Since there is no unicode version of PyOS_double_to_string, - just use the 8 bit version and then convert to unicode. */ - re_unicode_tmp = _PyUnicode_FromASCII(re_buf, n_re_digits); - if (re_unicode_tmp == NULL) - goto done; - i_re = 0; - - im_unicode_tmp = _PyUnicode_FromASCII(im_buf, n_im_digits); - if (im_unicode_tmp == NULL) - goto done; - i_im = 0; - - /* Is a sign character present in the output? If so, remember it - and skip it */ - if (PyUnicode_READ_CHAR(re_unicode_tmp, i_re) == '-') { - re_sign_char = '-'; - ++i_re; - --n_re_digits; - } - if (PyUnicode_READ_CHAR(im_unicode_tmp, i_im) == '-') { - im_sign_char = '-'; - ++i_im; - --n_im_digits; - } - - /* Determine if we have any "remainder" (after the digits, might include - decimal or exponent or both (or neither)) */ - parse_number(re_unicode_tmp, i_re, i_re + n_re_digits, - &n_re_remainder, &re_has_decimal); - parse_number(im_unicode_tmp, i_im, i_im + n_im_digits, - &n_im_remainder, &im_has_decimal); - - /* Determine the grouping, separator, and decimal point, if any. */ - if (get_locale_info(format->type == 'n' ? LT_CURRENT_LOCALE : - format->thousands_separators, - &locale) == -1) - goto done; - - /* Turn off any padding. We'll do it later after we've composed - the numbers without padding. */ - tmp_format.fill_char = '\0'; - tmp_format.align = '<'; - tmp_format.width = -1; - - /* Calculate how much memory we'll need. */ - n_re_total = calc_number_widths(&re_spec, 0, re_sign_char, - i_re, i_re + n_re_digits, n_re_remainder, - re_has_decimal, &locale, &tmp_format, - &maxchar); - if (n_re_total == -1) { - goto done; - } - - /* Same formatting, but always include a sign, unless the real part is - * going to be omitted, in which case we use whatever sign convention was - * requested by the original format. */ - if (!skip_re) - tmp_format.sign = '+'; - n_im_total = calc_number_widths(&im_spec, 0, im_sign_char, - i_im, i_im + n_im_digits, n_im_remainder, - im_has_decimal, &locale, &tmp_format, - &maxchar); - if (n_im_total == -1) { - goto done; - } - - if (skip_re) - n_re_total = 0; - - /* Add 1 for the 'j', and optionally 2 for parens. */ - calc_padding(n_re_total + n_im_total + 1 + add_parens * 2, - format->width, format->align, &lpad, &rpad, &total); - - if (lpad || rpad) - maxchar = Py_MAX(maxchar, format->fill_char); - - if (_PyUnicodeWriter_Prepare(writer, total, maxchar) == -1) - goto done; - rkind = writer->kind; - rdata = writer->data; - - /* Populate the memory. First, the padding. */ - result = fill_padding(writer, - n_re_total + n_im_total + 1 + add_parens * 2, - format->fill_char, lpad, rpad); - if (result == -1) - goto done; - - if (add_parens) { - PyUnicode_WRITE(rkind, rdata, writer->pos, '('); - writer->pos++; - } - - if (!skip_re) { - result = fill_number(writer, &re_spec, - re_unicode_tmp, i_re, - NULL, 0, - 0, - &locale, 0); - if (result == -1) - goto done; - } - result = fill_number(writer, &im_spec, - im_unicode_tmp, i_im, - NULL, 0, - 0, - &locale, 0); - if (result == -1) - goto done; - PyUnicode_WRITE(rkind, rdata, writer->pos, 'j'); - writer->pos++; - - if (add_parens) { - PyUnicode_WRITE(rkind, rdata, writer->pos, ')'); - writer->pos++; - } - - writer->pos += rpad; - -done: - PyMem_Free(re_buf); - PyMem_Free(im_buf); - Py_XDECREF(re_unicode_tmp); - Py_XDECREF(im_unicode_tmp); - free_locale_info(&locale); - return result; -} - -/************************************************************************/ -/*********** built in formatters ****************************************/ -/************************************************************************/ -static int -format_obj(PyObject *obj, _PyUnicodeWriter *writer) -{ - PyObject *str; - int err; - - str = PyObject_Str(obj); - if (str == NULL) - return -1; - err = _PyUnicodeWriter_WriteStr(writer, str); - Py_DECREF(str); - return err; -} - -int -_PyUnicode_FormatAdvancedWriter(_PyUnicodeWriter *writer, - PyObject *obj, - PyObject *format_spec, - Py_ssize_t start, Py_ssize_t end) -{ - InternalFormatSpec format; - - assert(PyUnicode_Check(obj)); - - /* check for the special case of zero length format spec, make - it equivalent to str(obj) */ - if (start == end) { - if (PyUnicode_CheckExact(obj)) - return _PyUnicodeWriter_WriteStr(writer, obj); - else - return format_obj(obj, writer); - } - - /* parse the format_spec */ - if (!parse_internal_render_format_spec(obj, format_spec, start, end, - &format, 's', '<')) - return -1; - - /* type conversion? */ - switch (format.type) { - case 's': - /* no type conversion needed, already a string. do the formatting */ - return format_string_internal(obj, &format, writer); - default: - /* unknown */ - unknown_presentation_type(format.type, Py_TYPE(obj)->tp_name); - return -1; - } -} - -int -_PyLong_FormatAdvancedWriter(_PyUnicodeWriter *writer, - PyObject *obj, - PyObject *format_spec, - Py_ssize_t start, Py_ssize_t end) -{ - PyObject *tmp = NULL; - InternalFormatSpec format; - int result = -1; - - /* check for the special case of zero length format spec, make - it equivalent to str(obj) */ - if (start == end) { - if (PyLong_CheckExact(obj)) - return _PyLong_FormatWriter(writer, obj, 10, 0); - else - return format_obj(obj, writer); - } - - /* parse the format_spec */ - if (!parse_internal_render_format_spec(obj, format_spec, start, end, - &format, 'd', '>')) - goto done; - - /* type conversion? */ - switch (format.type) { - case 'b': - case 'c': - case 'd': - case 'o': - case 'x': - case 'X': - case 'n': - /* no type conversion needed, already an int. do the formatting */ - result = format_long_internal(obj, &format, writer); - break; - - case 'e': - case 'E': - case 'f': - case 'F': - case 'g': - case 'G': - case '%': - /* convert to float */ - tmp = PyNumber_Float(obj); - if (tmp == NULL) - goto done; - result = format_float_internal(tmp, &format, writer); - break; - - default: - /* unknown */ - unknown_presentation_type(format.type, Py_TYPE(obj)->tp_name); - goto done; - } - -done: - Py_XDECREF(tmp); - return result; -} - -int -_PyFloat_FormatAdvancedWriter(_PyUnicodeWriter *writer, - PyObject *obj, - PyObject *format_spec, - Py_ssize_t start, Py_ssize_t end) -{ - InternalFormatSpec format; - - /* check for the special case of zero length format spec, make - it equivalent to str(obj) */ - if (start == end) - return format_obj(obj, writer); - - /* parse the format_spec */ - if (!parse_internal_render_format_spec(obj, format_spec, start, end, - &format, '\0', '>')) - return -1; - - /* type conversion? */ - switch (format.type) { - case '\0': /* No format code: like 'g', but with at least one decimal. */ - case 'e': - case 'E': - case 'f': - case 'F': - case 'g': - case 'G': - case 'n': - case '%': - /* no conversion, already a float. do the formatting */ - return format_float_internal(obj, &format, writer); - - default: - /* unknown */ - unknown_presentation_type(format.type, Py_TYPE(obj)->tp_name); - return -1; - } -} - -int -_PyComplex_FormatAdvancedWriter(_PyUnicodeWriter *writer, - PyObject *obj, - PyObject *format_spec, - Py_ssize_t start, Py_ssize_t end) -{ - InternalFormatSpec format; - - /* check for the special case of zero length format spec, make - it equivalent to str(obj) */ - if (start == end) - return format_obj(obj, writer); - - /* parse the format_spec */ - if (!parse_internal_render_format_spec(obj, format_spec, start, end, - &format, '\0', '>')) - return -1; - - /* type conversion? */ - switch (format.type) { - case '\0': /* No format code: like 'g', but with at least one decimal. */ - case 'e': - case 'E': - case 'f': - case 'F': - case 'g': - case 'G': - case 'n': - /* no conversion, already a complex. do the formatting */ - return format_complex_internal(obj, &format, writer); - - default: - /* unknown */ - unknown_presentation_type(format.type, Py_TYPE(obj)->tp_name); - return -1; - } -} |