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comparison src/core/ngx_string.c @ 6626:b3682580c1bd

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Avoid left-shifting integers into the sign bit, which is undefined. Found with UndefinedBehaviorSanitizer.
author Sergey Kandaurov <pluknet@nginx.com>
date Thu, 07 Jul 2016 21:02:28 +0300
parents fcbac620ae83
children 289403abc84e 5c25f01bbd52
comparison
equal deleted inserted replaced
6625:a616bdc38645 6626:b3682580c1bd
1561 /* find the number of the characters to be escaped */ 1561 /* find the number of the characters to be escaped */
1562 1562
1563 n = 0; 1563 n = 0;
1564 1564
1565 while (size) { 1565 while (size) {
1566 if (escape[*src >> 5] & (1 << (*src & 0x1f))) { 1566 if (escape[*src >> 5] & (1U << (*src & 0x1f))) {
1567 n++; 1567 n++;
1568 } 1568 }
1569 src++; 1569 src++;
1570 size--; 1570 size--;
1571 } 1571 }
1572 1572
1573 return (uintptr_t) n; 1573 return (uintptr_t) n;
1574 } 1574 }
1575 1575
1576 while (size) { 1576 while (size) {
1577 if (escape[*src >> 5] & (1 << (*src & 0x1f))) { 1577 if (escape[*src >> 5] & (1U << (*src & 0x1f))) {
1578 *dst++ = '%'; 1578 *dst++ = '%';
1579 *dst++ = hex[*src >> 4]; 1579 *dst++ = hex[*src >> 4];
1580 *dst++ = hex[*src & 0xf]; 1580 *dst++ = hex[*src & 0xf];
1581 src++; 1581 src++;
1582 1582