325 lines
6.8 KiB
C
325 lines
6.8 KiB
C
/* string.c
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* (c) 2002 Mikulas Patocka
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* This file is a part of the Links program, released under GPL.
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*/
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#include "links.h"
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int snprint(unsigned char *s, int n, my_uintptr_t num)
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{
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my_uintptr_t q = 1;
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while (q <= num / 10) q *= 10;
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while (n-- > 1 && q) {
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*(s++) = (unsigned char)(num / q + '0');
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num %= q;
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#ifdef __DECC_VER
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do_not_optimize_here(&q); /* compiler bug */
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#endif
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q /= 10;
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}
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*s = 0;
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return !!q;
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}
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int snzprint(unsigned char *s, int n, off_t num)
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{
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off_t q = 1;
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if (n > 1 && num < 0) *(s++) = '-', num = -num, n--;
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while (q <= num / 10) q *= 10;
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while (n-- > 1 && q) {
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*(s++) = (unsigned char)(num / q + '0');
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num %= q;
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#ifdef __DECC_VER
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do_not_optimize_here(&q); /* compiler bug */
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#endif
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q /= 10;
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}
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*s = 0;
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return !!q;
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}
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void add_to_strn(unsigned char **s, unsigned char *a)
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{
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unsigned char *p;
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size_t l1 = strlen(cast_const_char *s), l2 = strlen(cast_const_char a);
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if (((l1 | l2) | (l1 + l2 + 1)) > MAXINT) overalloc();
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p = (unsigned char *)mem_realloc(*s, l1 + l2 + 1);
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strcat(cast_char p, cast_const_char a);
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*s = p;
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}
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void extend_str(unsigned char **s, int n)
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{
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size_t l = strlen(cast_const_char *s);
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if (((l | n) | (l + n + 1)) > MAXINT) overalloc();
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*s = (unsigned char *)mem_realloc(*s, l + n + 1);
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}
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void add_bytes_to_str(unsigned char **s, int *l, unsigned char *a, size_t ll)
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{
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unsigned char *p;
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size_t old_length;
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size_t new_length;
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size_t x;
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if (!ll)
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return;
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p = *s;
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old_length = (unsigned)*l;
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if (ll + old_length >= (unsigned)MAXINT / 2 || ll + old_length < ll) overalloc();
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new_length = old_length + ll;
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*l = (int)new_length;
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x = old_length ^ new_length;
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if (x >= old_length) {
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/* Need to realloc */
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#ifdef HAVE___BUILTIN_CLZ
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#if !( \
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defined(__tune_i386__) || \
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defined(__tune_i486__) || \
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defined(__tune_i586__) || \
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defined(__tune_k6__) || \
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defined(__tune_lakemont__) || \
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(defined(__alpha__) && !defined(__alpha_cix__)) || \
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(defined(__mips) && __mips < 32) || \
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(defined(__ARM_ARCH) && __ARM_ARCH < 5) || \
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(defined(__sparc__) && (!defined(__VIS__) || __VIS__ < 0x300)) ||\
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defined(__hppa) || \
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defined(__riscv) || \
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defined(__sh__))
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if (!(sizeof(unsigned) & (sizeof(unsigned) - 1))) {
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new_length = 2U << ((sizeof(unsigned) * 8 - 1)
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#ifdef __ICC
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-
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#else
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^
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#endif
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__builtin_clz(new_length));
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} else
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#endif
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#endif
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{
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new_length |= new_length >> 1;
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new_length |= new_length >> 2;
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new_length |= new_length >> 4;
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new_length |= new_length >> 8;
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new_length |= new_length >> 16;
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new_length++;
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}
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p = (unsigned char *)mem_realloc(p, new_length);
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*s = p;
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}
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p[*l] = 0;
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memcpy(p + old_length, a, ll);
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}
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void add_to_str(unsigned char **s, int *l, unsigned char *a)
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{
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add_bytes_to_str(s, l, a, strlen(cast_const_char a));
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}
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void add_chr_to_str(unsigned char **s, int *l, unsigned char a)
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{
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add_bytes_to_str(s, l, &a, 1);
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}
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void add_unsigned_long_num_to_str(unsigned char **s, int *l, my_uintptr_t n)
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{
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unsigned char a[64];
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snprint(a, 64, n);
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add_to_str(s, l, a);
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}
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void add_num_to_str(unsigned char **s, int *l, off_t n)
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{
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unsigned char a[64];
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if (n >= 0 && n < 1000) {
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unsigned sn = (unsigned)n;
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unsigned char *p = a;
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if (sn >= 100) {
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*p++ = '0' + sn / 100;
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sn %= 100;
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goto d10;
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}
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if (sn >= 10) {
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d10:
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*p++ = '0' + sn / 10;
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sn %= 10;
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}
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*p++ = '0' + sn;
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add_bytes_to_str(s, l, a, p - a);
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} else {
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snzprint(a, 64, n);
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add_to_str(s, l, a);
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}
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}
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void add_knum_to_str(unsigned char **s, int *l, off_t n)
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{
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unsigned char a[13];
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if (n && n / (1024 * 1024) * (1024 * 1024) == n) snzprint(a, 12, n / (1024 * 1024)), a[strlen(cast_const_char a) + 1] = 0, a[strlen(cast_const_char a)] = 'M';
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else if (n && n / 1024 * 1024 == n) snzprint(a, 12, n / 1024), a[strlen(cast_const_char a) + 1] = 0, a[strlen(cast_const_char a)] = 'k';
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else snzprint(a, 13, n);
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add_to_str(s, l, a);
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}
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long strtolx(unsigned char *c, unsigned char **end)
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{
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char *end_c;
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long l;
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if (c[0] == '0' && upcase(c[1]) == 'X' && c[2]) l = strtol(cast_const_char(c + 2), &end_c, 16);
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else l = strtol(cast_const_char c, &end_c, 10);
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*end = cast_uchar end_c;
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if (upcase(**end) == 'K') {
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(*end)++;
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if (l < -MAXINT / 1024) return -MAXINT;
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if (l > MAXINT / 1024) return MAXINT;
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return l * 1024;
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}
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if (upcase(**end) == 'M') {
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(*end)++;
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if (l < -MAXINT / (1024 * 1024)) return -MAXINT;
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if (l > MAXINT / (1024 * 1024)) return MAXINT;
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return l * (1024 * 1024);
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}
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return l;
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}
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my_strtoll_t my_strtoll(unsigned char *string, unsigned char **end)
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{
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char *end_c;
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my_strtoll_t f;
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errno = 0;
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#if defined(HAVE_STRTOLL)
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f = strtoll(cast_const_char string, &end_c, 10);
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#elif defined(HAVE_STRTOQ)
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f = strtoq(cast_const_char string, &end_c, 10);
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#elif defined(HAVE_STRTOIMAX)
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f = strtoimax(cast_const_char string, &end_c, 10);
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#else
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f = strtol(cast_const_char string, &end_c, 10);
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#endif
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if (end)
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*end = cast_uchar end_c;
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if (f < 0 || errno) return -1;
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return f;
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}
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/* Copies at most dst_size chars into dst. Ensures null termination of dst. */
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void safe_strncpy(unsigned char *dst, const unsigned char *src, size_t dst_size)
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{
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dst[dst_size - 1] = 0;
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strncpy(cast_char dst, cast_const_char src, dst_size - 1);
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}
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#ifdef JS
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/* deletes all nonprintable characters from string */
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void skip_nonprintable(unsigned char *txt)
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{
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unsigned char *txt1=txt;
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if (!txt||!*txt)return;
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for (;*txt;txt++)
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switch(*txt)
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{
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case 1:
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case 2:
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case 3:
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case 4:
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case 5:
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case 6:
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case 7:
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case 8:
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case 11:
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case 12:
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case 13:
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case 14:
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case 15:
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case 16:
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case 17:
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case 18:
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case 19:
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case 20:
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case 21:
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case 22:
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case 23:
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case 24:
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case 25:
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case 26:
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case 27:
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case 28:
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case 29:
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case 30:
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case 31:
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break;
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case 9:
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*txt1=' ';
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txt1++;
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break;
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default:
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*txt1=*txt;
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txt1++;
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break;
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}
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*txt1=0;
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}
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#endif
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/* don't use strcasecmp because it depends on locale */
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int casestrcmp(const unsigned char *s1, const unsigned char *s2)
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{
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while (1) {
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unsigned char c1 = *s1;
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unsigned char c2 = *s2;
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c1 = locase(c1);
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c2 = locase(c2);
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if (c1 != c2) {
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return (int)c1 - (int)c2;
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}
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if (!*s1) break;
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s1++, s2++;
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}
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return 0;
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}
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/* case insensitive compare of 2 strings */
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/* comparison ends after len (or less) characters */
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/* return value: 1=strings differ, 0=strings are same */
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int casecmp(const unsigned char *c1, const unsigned char *c2, size_t len)
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{
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size_t i;
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for (i = 0; i < len; i++) if (srch_cmp(c1[i], c2[i])) return 1;
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return 0;
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}
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int casestrstr(const unsigned char *h, const unsigned char *n)
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{
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const unsigned char *p;
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for (p=h;*p;p++)
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{
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if (!srch_cmp(*p,*n)) /* same */
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{
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const unsigned char *q, *r;
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for (q=n, r=p;*r&&*q;)
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{
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if (!srch_cmp(*q,*r)) r++,q++; /* same */
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else break;
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}
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if (!*q) return 1;
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}
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}
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return 0;
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}
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unsigned hash_string(unsigned char *u)
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{
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unsigned hash = 0;
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for (; *u; u++)
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hash = hash * 0x11 + *u;
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return hash;
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}
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