88 lines
2 KiB
C
88 lines
2 KiB
C
/*
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* util_msg.c - 고정길이 전문 pack/unpack 유틸리티 (plain C, 공유)
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*/
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#include "acq_util.h"
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#include <string.h>
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#include <ctype.h>
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void msg_field_copy(char *out, const char *field, int len)
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{
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int end;
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if (!out || !field || len < 0)
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return;
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end = len;
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while (end > 0 && (field[end - 1] == ' ' || field[end - 1] == '\0'))
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end--;
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memcpy(out, field, end);
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out[end] = '\0';
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}
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void msg_field_set(char *field, const char *src, int len)
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{
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int slen, i;
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if (!field || len < 0)
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return;
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slen = src ? (int)strlen(src) : 0;
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if (slen > len)
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slen = len;
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memcpy(field, src, slen);
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for (i = slen; i < len; i++)
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field[i] = ' ';
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}
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void msg_field_set_num(char *field, const char *src, int len)
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{
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int slen, pad, i;
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if (!field || len < 0)
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return;
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slen = src ? (int)strlen(src) : 0;
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if (slen > len)
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slen = len;
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pad = len - slen;
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for (i = 0; i < pad; i++)
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field[i] = '0';
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if (src)
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memcpy(field + pad, src, slen);
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}
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int msg_unpack(acq_msg_t *msg, const char *raw, int rawlen)
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{
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if (!msg || !raw)
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return -1;
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if (rawlen < MSG_ACQ_LEN)
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return -1;
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memcpy(msg, raw, MSG_ACQ_LEN);
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return 0;
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}
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int msg_pack(const acq_msg_t *msg, char *raw, int rawlen)
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{
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if (!msg || !raw)
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return -1;
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if (rawlen < MSG_ACQ_LEN)
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return -1;
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memcpy(raw, msg, MSG_ACQ_LEN);
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return 0;
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}
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static int field_blank(const char *field, int len)
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{
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int i;
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for (i = 0; i < len; i++)
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if (field[i] != ' ' && field[i] != '\0')
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return 0;
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return 1;
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}
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int msg_validate(const acq_msg_t *msg)
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{
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if (!msg)
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return -1;
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if (field_blank(msg->msg_type, FLD_MSG_TYPE_LEN)) return -1;
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if (field_blank(msg->merch_id, FLD_MERCH_ID_LEN)) return -1;
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if (field_blank(msg->card_no, FLD_CARD_NO_LEN)) return -1;
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if (field_blank(msg->amount, FLD_AMOUNT_LEN)) return -1;
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if (field_blank(msg->txn_date, FLD_TXN_DATE_LEN)) return -1;
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return 0;
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}
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