--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Python/pystrtod.c Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,490 @@
+/* -*- Mode: C; c-file-style: "python" -*- */
+
+#include <Python.h>
+#include <locale.h>
+
+/* ascii character tests (as opposed to locale tests) */
+#define ISSPACE(c) ((c) == ' ' || (c) == '\f' || (c) == '\n' || \
+ (c) == '\r' || (c) == '\t' || (c) == '\v')
+#define ISDIGIT(c) ((c) >= '0' && (c) <= '9')
+
+
+/**
+ * PyOS_ascii_strtod:
+ * @nptr: the string to convert to a numeric value.
+ * @endptr: if non-%NULL, it returns the character after
+ * the last character used in the conversion.
+ *
+ * Converts a string to a #gdouble value.
+ * This function behaves like the standard strtod() function
+ * does in the C locale. It does this without actually
+ * changing the current locale, since that would not be
+ * thread-safe.
+ *
+ * This function is typically used when reading configuration
+ * files or other non-user input that should be locale independent.
+ * To handle input from the user you should normally use the
+ * locale-sensitive system strtod() function.
+ *
+ * If the correct value would cause overflow, plus or minus %HUGE_VAL
+ * is returned (according to the sign of the value), and %ERANGE is
+ * stored in %errno. If the correct value would cause underflow,
+ * zero is returned and %ERANGE is stored in %errno.
+ * If memory allocation fails, %ENOMEM is stored in %errno.
+ *
+ * This function resets %errno before calling strtod() so that
+ * you can reliably detect overflow and underflow.
+ *
+ * Return value: the #gdouble value.
+ **/
+double
+PyOS_ascii_strtod(const char *nptr, char **endptr)
+{
+ char *fail_pos;
+ double val = -1.0;
+ struct lconv *locale_data;
+ const char *decimal_point;
+ size_t decimal_point_len;
+ const char *p, *decimal_point_pos;
+ const char *end = NULL; /* Silence gcc */
+ const char *digits_pos = NULL;
+ int negate = 0;
+
+ assert(nptr != NULL);
+
+ fail_pos = NULL;
+
+ locale_data = localeconv();
+ decimal_point = locale_data->decimal_point;
+ decimal_point_len = strlen(decimal_point);
+
+ assert(decimal_point_len != 0);
+
+ decimal_point_pos = NULL;
+
+ /* We process any leading whitespace and the optional sign manually,
+ then pass the remainder to the system strtod. This ensures that
+ the result of an underflow has the correct sign. (bug #1725) */
+
+ p = nptr;
+ /* Skip leading space */
+ while (ISSPACE(*p))
+ p++;
+
+ /* Process leading sign, if present */
+ if (*p == '-') {
+ negate = 1;
+ p++;
+ } else if (*p == '+') {
+ p++;
+ }
+
+ /* What's left should begin with a digit, a decimal point, or one of
+ the letters i, I, n, N. It should not begin with 0x or 0X */
+ if ((!ISDIGIT(*p) &&
+ *p != '.' && *p != 'i' && *p != 'I' && *p != 'n' && *p != 'N')
+ ||
+ (*p == '0' && (p[1] == 'x' || p[1] == 'X')))
+ {
+ if (endptr)
+ *endptr = (char*)nptr;
+ errno = EINVAL;
+ return val;
+ }
+ digits_pos = p;
+
+ if (decimal_point[0] != '.' ||
+ decimal_point[1] != 0)
+ {
+ while (ISDIGIT(*p))
+ p++;
+
+ if (*p == '.')
+ {
+ decimal_point_pos = p++;
+
+ while (ISDIGIT(*p))
+ p++;
+
+ if (*p == 'e' || *p == 'E')
+ p++;
+ if (*p == '+' || *p == '-')
+ p++;
+ while (ISDIGIT(*p))
+ p++;
+ end = p;
+ }
+ else if (strncmp(p, decimal_point, decimal_point_len) == 0)
+ {
+ /* Python bug #1417699 */
+ if (endptr)
+ *endptr = (char*)nptr;
+ errno = EINVAL;
+ return val;
+ }
+ /* For the other cases, we need not convert the decimal
+ point */
+ }
+
+ /* Set errno to zero, so that we can distinguish zero results
+ and underflows */
+ errno = 0;
+
+ if (decimal_point_pos)
+ {
+ char *copy, *c;
+
+ /* We need to convert the '.' to the locale specific decimal
+ point */
+ copy = (char *)PyMem_MALLOC(end - digits_pos +
+ 1 + decimal_point_len);
+ if (copy == NULL) {
+ if (endptr)
+ *endptr = (char *)nptr;
+ errno = ENOMEM;
+ return val;
+ }
+
+ c = copy;
+ memcpy(c, digits_pos, decimal_point_pos - digits_pos);
+ c += decimal_point_pos - digits_pos;
+ memcpy(c, decimal_point, decimal_point_len);
+ c += decimal_point_len;
+ memcpy(c, decimal_point_pos + 1,
+ end - (decimal_point_pos + 1));
+ c += end - (decimal_point_pos + 1);
+ *c = 0;
+
+ val = strtod(copy, &fail_pos);
+
+ if (fail_pos)
+ {
+ if (fail_pos > decimal_point_pos)
+ fail_pos = (char *)digits_pos +
+ (fail_pos - copy) -
+ (decimal_point_len - 1);
+ else
+ fail_pos = (char *)digits_pos +
+ (fail_pos - copy);
+ }
+
+ PyMem_FREE(copy);
+
+ }
+ else {
+ val = strtod(digits_pos, &fail_pos);
+ }
+
+ if (fail_pos == digits_pos)
+ fail_pos = (char *)nptr;
+
+ if (negate && fail_pos != nptr)
+ val = -val;
+
+ if (endptr)
+ *endptr = fail_pos;
+
+ return val;
+}
+
+/* Given a string that may have a decimal point in the current
+ locale, change it back to a dot. Since the string cannot get
+ longer, no need for a maximum buffer size parameter. */
+Py_LOCAL_INLINE(void)
+change_decimal_from_locale_to_dot(char* buffer)
+{
+ struct lconv *locale_data = localeconv();
+ const char *decimal_point = locale_data->decimal_point;
+
+ if (decimal_point[0] != '.' || decimal_point[1] != 0) {
+ size_t decimal_point_len = strlen(decimal_point);
+
+ if (*buffer == '+' || *buffer == '-')
+ buffer++;
+ while (isdigit(Py_CHARMASK(*buffer)))
+ buffer++;
+ if (strncmp(buffer, decimal_point, decimal_point_len) == 0) {
+ *buffer = '.';
+ buffer++;
+ if (decimal_point_len > 1) {
+ /* buffer needs to get smaller */
+ size_t rest_len = strlen(buffer +
+ (decimal_point_len - 1));
+ memmove(buffer,
+ buffer + (decimal_point_len - 1),
+ rest_len);
+ buffer[rest_len] = 0;
+ }
+ }
+ }
+}
+
+
+/* From the C99 standard, section 7.19.6:
+The exponent always contains at least two digits, and only as many more digits
+as necessary to represent the exponent.
+*/
+#define MIN_EXPONENT_DIGITS 2
+
+/* Ensure that any exponent, if present, is at least MIN_EXPONENT_DIGITS
+ in length. */
+Py_LOCAL_INLINE(void)
+ensure_minumim_exponent_length(char* buffer, size_t buf_size)
+{
+ char *p = strpbrk(buffer, "eE");
+ if (p && (*(p + 1) == '-' || *(p + 1) == '+')) {
+ char *start = p + 2;
+ int exponent_digit_cnt = 0;
+ int leading_zero_cnt = 0;
+ int in_leading_zeros = 1;
+ int significant_digit_cnt;
+
+ /* Skip over the exponent and the sign. */
+ p += 2;
+
+ /* Find the end of the exponent, keeping track of leading
+ zeros. */
+ while (*p && isdigit(Py_CHARMASK(*p))) {
+ if (in_leading_zeros && *p == '0')
+ ++leading_zero_cnt;
+ if (*p != '0')
+ in_leading_zeros = 0;
+ ++p;
+ ++exponent_digit_cnt;
+ }
+
+ significant_digit_cnt = exponent_digit_cnt - leading_zero_cnt;
+ if (exponent_digit_cnt == MIN_EXPONENT_DIGITS) {
+ /* If there are 2 exactly digits, we're done,
+ regardless of what they contain */
+ }
+ else if (exponent_digit_cnt > MIN_EXPONENT_DIGITS) {
+ int extra_zeros_cnt;
+
+ /* There are more than 2 digits in the exponent. See
+ if we can delete some of the leading zeros */
+ if (significant_digit_cnt < MIN_EXPONENT_DIGITS)
+ significant_digit_cnt = MIN_EXPONENT_DIGITS;
+ extra_zeros_cnt = exponent_digit_cnt -
+ significant_digit_cnt;
+
+ /* Delete extra_zeros_cnt worth of characters from the
+ front of the exponent */
+ assert(extra_zeros_cnt >= 0);
+
+ /* Add one to significant_digit_cnt to copy the
+ trailing 0 byte, thus setting the length */
+ memmove(start,
+ start + extra_zeros_cnt,
+ significant_digit_cnt + 1);
+ }
+ else {
+ /* If there are fewer than 2 digits, add zeros
+ until there are 2, if there's enough room */
+ int zeros = MIN_EXPONENT_DIGITS - exponent_digit_cnt;
+ if (start + zeros + exponent_digit_cnt + 1
+ < buffer + buf_size) {
+ memmove(start + zeros, start,
+ exponent_digit_cnt + 1);
+ memset(start, '0', zeros);
+ }
+ }
+ }
+}
+
+/* Ensure that buffer has a decimal point in it. The decimal point
+ will not be in the current locale, it will always be '.' */
+Py_LOCAL_INLINE(void)
+ensure_decimal_point(char* buffer, size_t buf_size)
+{
+ int insert_count = 0;
+ char* chars_to_insert;
+
+ /* search for the first non-digit character */
+ char *p = buffer;
+ if (*p == '-' || *p == '+')
+ /* Skip leading sign, if present. I think this could only
+ ever be '-', but it can't hurt to check for both. */
+ ++p;
+ while (*p && isdigit(Py_CHARMASK(*p)))
+ ++p;
+
+ if (*p == '.') {
+ if (isdigit(Py_CHARMASK(*(p+1)))) {
+ /* Nothing to do, we already have a decimal
+ point and a digit after it */
+ }
+ else {
+ /* We have a decimal point, but no following
+ digit. Insert a zero after the decimal. */
+ ++p;
+ chars_to_insert = "0";
+ insert_count = 1;
+ }
+ }
+ else {
+ chars_to_insert = ".0";
+ insert_count = 2;
+ }
+ if (insert_count) {
+ size_t buf_len = strlen(buffer);
+ if (buf_len + insert_count + 1 >= buf_size) {
+ /* If there is not enough room in the buffer
+ for the additional text, just skip it. It's
+ not worth generating an error over. */
+ }
+ else {
+ memmove(p + insert_count, p,
+ buffer + strlen(buffer) - p + 1);
+ memcpy(p, chars_to_insert, insert_count);
+ }
+ }
+}
+
+/* Add the locale specific grouping characters to buffer. Note
+ that any decimal point (if it's present) in buffer is already
+ locale-specific. Return 0 on error, else 1. */
+Py_LOCAL_INLINE(int)
+add_thousands_grouping(char* buffer, size_t buf_size)
+{
+ Py_ssize_t len = strlen(buffer);
+ struct lconv *locale_data = localeconv();
+ const char *decimal_point = locale_data->decimal_point;
+
+ /* Find the decimal point, if any. We're only concerned
+ about the characters to the left of the decimal when
+ adding grouping. */
+ char *p = strstr(buffer, decimal_point);
+ if (!p) {
+ /* No decimal, use the entire string. */
+
+ /* If any exponent, adjust p. */
+ p = strpbrk(buffer, "eE");
+ if (!p)
+ /* No exponent and no decimal. Use the entire
+ string. */
+ p = buffer + len;
+ }
+ /* At this point, p points just past the right-most character we
+ want to format. We need to add the grouping string for the
+ characters between buffer and p. */
+ return _PyString_InsertThousandsGrouping(buffer, len, p-buffer,
+ buf_size, NULL, 1);
+}
+
+/* see FORMATBUFLEN in unicodeobject.c */
+#define FLOAT_FORMATBUFLEN 120
+
+/**
+ * PyOS_ascii_formatd:
+ * @buffer: A buffer to place the resulting string in
+ * @buf_size: The length of the buffer.
+ * @format: The printf()-style format to use for the
+ * code to use for converting.
+ * @d: The #gdouble to convert
+ *
+ * Converts a #gdouble to a string, using the '.' as
+ * decimal point. To format the number you pass in
+ * a printf()-style format string. Allowed conversion
+ * specifiers are 'e', 'E', 'f', 'F', 'g', 'G', and 'n'.
+ *
+ * 'n' is the same as 'g', except it uses the current locale.
+ * 'Z' is the same as 'g', except it always has a decimal and
+ * at least one digit after the decimal.
+ *
+ * Return value: The pointer to the buffer with the converted string.
+ **/
+char *
+PyOS_ascii_formatd(char *buffer,
+ size_t buf_size,
+ const char *format,
+ double d)
+{
+ char format_char;
+ size_t format_len = strlen(format);
+
+ /* For type 'n', we need to make a copy of the format string, because
+ we're going to modify 'n' -> 'g', and format is const char*, so we
+ can't modify it directly. FLOAT_FORMATBUFLEN should be longer than
+ we ever need this to be. There's an upcoming check to ensure it's
+ big enough. */
+ /* Issue 2264: code 'Z' requires copying the format. 'Z' is 'g', but
+ also with at least one character past the decimal. */
+ char tmp_format[FLOAT_FORMATBUFLEN];
+
+ /* The last character in the format string must be the format char */
+ format_char = format[format_len - 1];
+
+ if (format[0] != '%')
+ return NULL;
+
+ /* I'm not sure why this test is here. It's ensuring that the format
+ string after the first character doesn't have a single quote, a
+ lowercase l, or a percent. This is the reverse of the commented-out
+ test about 10 lines ago. */
+ if (strpbrk(format + 1, "'l%"))
+ return NULL;
+
+ /* Also curious about this function is that it accepts format strings
+ like "%xg", which are invalid for floats. In general, the
+ interface to this function is not very good, but changing it is
+ difficult because it's a public API. */
+
+ if (!(format_char == 'e' || format_char == 'E' ||
+ format_char == 'f' || format_char == 'F' ||
+ format_char == 'g' || format_char == 'G' ||
+ format_char == 'n' || format_char == 'Z'))
+ return NULL;
+
+ /* Map 'n' or 'Z' format_char to 'g', by copying the format string and
+ replacing the final char with a 'g' */
+ if (format_char == 'n' || format_char == 'Z') {
+ if (format_len + 1 >= sizeof(tmp_format)) {
+ /* The format won't fit in our copy. Error out. In
+ practice, this will never happen and will be
+ detected by returning NULL */
+ return NULL;
+ }
+ strcpy(tmp_format, format);
+ tmp_format[format_len - 1] = 'g';
+ format = tmp_format;
+ }
+
+
+ /* Have PyOS_snprintf do the hard work */
+ PyOS_snprintf(buffer, buf_size, format, d);
+
+ /* Do various fixups on the return string */
+
+ /* Get the current locale, and find the decimal point string.
+ Convert that string back to a dot. Do not do this if using the
+ 'n' (number) format code, since we want to keep the localized
+ decimal point in that case. */
+ if (format_char != 'n')
+ change_decimal_from_locale_to_dot(buffer);
+
+ /* If an exponent exists, ensure that the exponent is at least
+ MIN_EXPONENT_DIGITS digits, providing the buffer is large enough
+ for the extra zeros. Also, if there are more than
+ MIN_EXPONENT_DIGITS, remove as many zeros as possible until we get
+ back to MIN_EXPONENT_DIGITS */
+ ensure_minumim_exponent_length(buffer, buf_size);
+
+ /* If format_char is 'Z', make sure we have at least one character
+ after the decimal point (and make sure we have a decimal point). */
+ if (format_char == 'Z')
+ ensure_decimal_point(buffer, buf_size);
+
+ /* If format_char is 'n', add the thousands grouping. */
+ if (format_char == 'n')
+ if (!add_thousands_grouping(buffer, buf_size))
+ return NULL;
+
+ return buffer;
+}
+
+double
+PyOS_ascii_atof(const char *nptr)
+{
+ return PyOS_ascii_strtod(nptr, NULL);
+}