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Allow limiting string parse for numbers

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Kovid Goyal 2021-03-18 20:11:13 +05:30
parent eb1ad62632
commit f0c46c6c90
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1 changed files with 5 additions and 2 deletions
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7
src/calibre/srv/fast_css_transform.cpp
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@ -87,6 +87,8 @@ class pyobject_raii {
PyObject *detach() { PyObject *ans = handle; handle = NULL; return ans; } PyObject *detach() { PyObject *ans = handle; handle = NULL; return ans; }
}; };
// Parse numbers {{{
typedef long long integer_type; typedef long long integer_type;
class ParsedNumber { class ParsedNumber {
@ -133,12 +135,12 @@ parse_integer(const T &src, const size_t first, size_t last) {
template <typename T> template <typename T>
static ParsedNumber static ParsedNumber
parse_css_number(const T &src) { parse_css_number(const T &src, size_t limit = 0) {
int sign = 1, exponent_sign = 1; int sign = 1, exponent_sign = 1;
integer_type integer_part = 0, fractional_part = 0, exponent_part = 0; integer_type integer_part = 0, fractional_part = 0, exponent_part = 0;
unsigned num_of_fractional_digits = 0; unsigned num_of_fractional_digits = 0;
size_t first_digit = 0, last_digit = 0; size_t first_digit = 0, last_digit = 0;
const size_t src_sz = src.size(); const size_t src_sz = limit ? limit : src.size();
size_t pos = 0; size_t pos = 0;
#define read_sign(which) { if (pos < src_sz && (src[pos] == '+' || src[pos] == '-')) { if (src[pos++] == '-') which = -1; }} #define read_sign(which) { if (pos < src_sz && (src[pos] == '+' || src[pos] == '-')) { if (src[pos++] == '-') which = -1; }}
#define read_integer(which) { \ #define read_integer(which) { \
@ -173,6 +175,7 @@ parse_css_number(const T &src) {
#undef read_sign #undef read_sign
#undef read_integer #undef read_integer
} }
// }}}
enum class PropertyType : unsigned int { enum class PropertyType : unsigned int {
font_size, page_break, non_standard_writing_mode font_size, page_break, non_standard_writing_mode