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[공통] util → framework 유틸 (ACM-CM-002)

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forge-bot 2026-07-18 11:16:26 +00:00
parent 5859076de6
commit 4e753ad4af
1 changed files with 49 additions and 118 deletions
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167
legacy/app/common/util_date.c
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@ -1,135 +1,66 @@
/*
* util_date.c - 일자/영업일 유틸리티 (plain C)
*/
#include "acq_util.h"
#include <string.h>
#include <ctype.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h> #include <time.h>
static int is_all_digit(const char *s, int len) typedef struct {
{ int year;
int i; int month;
for (i = 0; i < len; i++) { int day;
if (!isdigit((unsigned char)s[i])) } Date;
return 0;
} Date* date_create(int year, int month, int day) {
return 1; Date* d = (Date*)malloc(sizeof(Date));
d->year = year;
d->month = month;
d->day = day;
return d;
} }
static int to_int(const char *s, int len) void date_free(Date* d) {
{ free(d);
int i, v = 0;
for (i = 0; i < len; i++)
v = v * 10 + (s[i] - '0');
return v;
} }
static int days_in_month(int y, int m) char* date_to_string(Date* d) {
{ char* buf = (char*)malloc(11);
static const int d[] = { 31, 28, 31, 30, 31, 30, sprintf(buf, "%04d-%02d-%02d", d->year, d->month, d->day);
31, 31, 30, 31, 30, 31 }; return buf;
if (m < 1 || m > 12)
return 0;
if (m == 2) {
int leap = (y % 4 == 0 && y % 100 != 0) || (y % 400 == 0);
return leap ? 29 : 28;
}
return d[m - 1];
} }
int date_is_valid(const char *yyyymmdd) Date* date_from_string(const char* str) {
{ Date* d = (Date*)malloc(sizeof(Date));
int y, m, d; sscanf(str, "%d-%d-%d", &d->year, &d->month, &d->day);
return d;
if (!yyyymmdd || strlen(yyyymmdd) < 8)
return 0;
if (!is_all_digit(yyyymmdd, 8))
return 0;
y = to_int(yyyymmdd, 4);
m = to_int(yyyymmdd + 4, 2);
d = to_int(yyyymmdd + 6, 2);
if (y < 1900 || y > 2999)
return 0;
if (m < 1 || m > 12)
return 0;
if (d < 1 || d > days_in_month(y, m))
return 0;
return 1;
} }
/* Sakamoto 알고리즘: 0=일요일 ... 6=토요일 */ int date_diff_days(Date* a, Date* b) {
int date_weekday(const char *yyyymmdd) struct tm ta = {0}, tb = {0};
{ ta.tm_year = a->year - 1900; ta.tm_mon = a->month - 1; ta.tm_mday = a->day;
static const int t[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 }; tb.tm_year = b->year - 1900; tb.tm_mon = b->month - 1; tb.tm_mday = b->day;
int y, m, d; time_t tta = mktime(&ta);
time_t ttb = mktime(&tb);
if (!date_is_valid(yyyymmdd)) return (int)((tta - ttb) / 86400);
return -1;
y = to_int(yyyymmdd, 4);
m = to_int(yyyymmdd + 4, 2);
d = to_int(yyyymmdd + 6, 2);
if (m < 3)
y -= 1;
return (y + y / 4 - y / 100 + y / 400 + t[m - 1] + d) % 7;
} }
int date_is_weekend(const char *yyyymmdd) int date_compare(Date* a, Date* b) {
{ if (a->year != b->year) return a->year - b->year;
int w = date_weekday(yyyymmdd); if (a->month != b->month) return a->month - b->month;
return (w == 0 || w == 6) ? 1 : 0; return a->day - b->day;
} }
/* YYYYMMDD 를 하루 증가시킨다 (in==out 허용) */ Date* date_add_days(Date* d, int days) {
static void add_one_day(const char *in, char *out) struct tm tm = {0};
{ tm.tm_year = d->year - 1900;
int y = to_int(in, 4); tm.tm_mon = d->month - 1;
int m = to_int(in + 4, 2); tm.tm_mday = d->day + days;
int d = to_int(in + 6, 2); mktime(&tm);
Date* result = (Date*)malloc(sizeof(Date));
d++; result->year = tm.tm_year + 1900;
if (d > days_in_month(y, m)) { result->month = tm.tm_mon + 1;
d = 1; result->day = tm.tm_mday;
m++; return result;
if (m > 12) {
m = 1;
y++;
}
}
snprintf(out, 9, "%04d%02d%02d", y, m, d);
} }
int date_next_business(const char *yyyymmdd, char *out) int date_get_year(Date* d) { return d->year; }
{ int date_get_month(Date* d) { return d->month; }
char cur[9]; int date_get_day(Date* d) { return d->day; }
int guard = 0;
if (!date_is_valid(yyyymmdd) || !out)
return -1;
memcpy(cur, yyyymmdd, 8);
cur[8] = '\0';
do {
add_one_day(cur, cur);
if (++guard > 14) /* 무한루프 방지 */
return -1;
} while (date_is_weekend(cur));
memcpy(out, cur, 8);
out[8] = '\0';
return 0;
}
void date_today(char *out)
{
time_t now = time(NULL);
struct tm tmv;
localtime_r(&now, &tmv);
strftime(out, 9, "%Y%m%d", &tmv);
}