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128 lines
2.6 KiB
C++
128 lines
2.6 KiB
C++
/** \file util.c
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Generic utilities library.
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Contains datastructures such as automatically growing array lists, priority queues, etc.
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*/
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <wchar.h>
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#include <math.h>
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#include <sys/time.h>
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#include <stdarg.h>
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#include <string.h>
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#include <ctype.h>
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#include <wctype.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <dirent.h>
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#include <errno.h>
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#include <assert.h>
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#include "fallback.h"
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#include "util.h"
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#include "common.h"
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#include "wutil.h"
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/**
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Minimum allocated size for data structures. Used to avoid excessive
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memory allocations for lists, hash tables, etc, which are nearly
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empty.
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*/
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#define MIN_SIZE 32
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/**
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Maximum number of characters that can be inserted using a single
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call to sb_printf. This is needed since vswprintf doesn't tell us
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what went wrong. We don't know if we ran out of space or something
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else went wrong. We assume that any error is an out of memory-error
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and try again until we reach this size. After this size has been
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reached, it is instead assumed that something was wrong with the
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format string.
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*/
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#define SB_MAX_SIZE (128*1024*1024)
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int wcsfilecmp(const wchar_t *a, const wchar_t *b)
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{
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CHECK(a, 0);
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CHECK(b, 0);
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if (*a==0)
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{
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if (*b==0)
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return 0;
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return -1;
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}
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if (*b==0)
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{
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return 1;
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}
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long secondary_diff=0;
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if (iswdigit(*a) && iswdigit(*b))
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{
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wchar_t *aend, *bend;
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long al;
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long bl;
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long diff;
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errno = 0;
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al = wcstol(a, &aend, 10);
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bl = wcstol(b, &bend, 10);
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if (errno)
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{
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/*
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Huuuuuuuuge numbers - fall back to regular string comparison
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*/
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return wcscmp(a, b);
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}
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diff = al - bl;
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if (diff)
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return diff > 0 ? 2 : -2;
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secondary_diff = (aend-a) - (bend-b);
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a=aend-1;
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b=bend-1;
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}
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else
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{
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int diff = towlower(*a) - towlower(*b);
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if (diff != 0)
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return (diff>0)?2:-2;
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secondary_diff = *a-*b;
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}
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int res = wcsfilecmp(a+1, b+1);
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if (abs(res) < 2)
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{
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/*
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No primary difference in rest of string.
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Use secondary difference on this element if found.
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*/
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if (secondary_diff)
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{
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return secondary_diff > 0 ? 1 :-1;
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}
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}
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return res;
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}
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long long get_time()
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{
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struct timeval time_struct;
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gettimeofday(&time_struct, 0);
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return 1000000ll*time_struct.tv_sec+time_struct.tv_usec;
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}
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