/*
 * This module implements the original read-from-file pb-update command.
 */

#include <sys/types.h>
#include <ctype.h>
#include <string.h>
#include <strings.h>
#include <stdio.h>
#include <stdlib.h>
#include "curfile.h"

extern u_char gsm7_encode_table[256];

static char *
decode_qstring_alpha(cp, record, maxlen, filename_for_errs, lineno_for_errs)
	char *cp, *filename_for_errs;
	u_char *record;
	unsigned maxlen;
{
	unsigned acclen, nadd;
	int c;

	for (acclen = 0; ; ) {
		if (*cp == '\0') {
unterm_qstring:		fprintf(stderr,
				"%s line %d: unterminated quoted string\n",
				filename_for_errs, lineno_for_errs);
			return(0);
		}
		if (*cp == '"')
			break;
		c = *cp++;
		if (c == '\\') {
			if (*cp == '\0')
				goto unterm_qstring;
			c = *cp++;
			switch (c) {
			case 'n':
				c = '\n';
				break;
			case 'r':
				c = '\r';
				break;
			case '"':
			case '\\':
				break;
			default:
				fprintf(stderr,
				"%s line %d: non-understood backslash escape\n",
					filename_for_errs, lineno_for_errs);
				return(0);
			}
		}
		c = gsm7_encode_table[c];
		if (c == 0xFF) {
			fprintf(stderr,
	"%s line %d: character in quoted string cannot be encoded in GSM7\n",
				filename_for_errs, lineno_for_errs);
			return(0);
		}
		if (c & 0x80)
			nadd = 2;
		else
			nadd = 1;
		if (acclen + nadd > maxlen) {
			fprintf(stderr,
		"%s line %d: alpha tag string is longer than SIM limit\n",
				filename_for_errs, lineno_for_errs);
			return(0);
		}
		if (c & 0x80)
			record[acclen++] = 0x1B;
		record[acclen++] = c & 0x7F;
	}
	return(cp + 1);
}

static char *
decode_hex_alpha(cp, record, maxlen, filename_for_errs, lineno_for_errs)
	char *cp, *filename_for_errs;
	u_char *record;
	unsigned maxlen;
{
	unsigned acclen;

	for (acclen = 0; ; ) {
		if (!isxdigit(cp[0]) || !isxdigit(cp[1]))
			break;
		if (acclen >= maxlen) {
			fprintf(stderr,
		"%s line %d: alpha tag string is longer than SIM limit\n",
				filename_for_errs, lineno_for_errs);
			return(0);
		}
		record[acclen++] = (decode_hex_digit(cp[0]) << 4) |
				    decode_hex_digit(cp[1]);
		cp += 2;
	}
	return(cp);
}

static
process_record(line, pb_record_len, pb_record_count, filename_for_errs,
		lineno_for_errs)
	char *line, *filename_for_errs;
	unsigned pb_record_len, pb_record_count;
{
	unsigned recno;
	u_char record[255], *fixp;
	u_char digits[20];
	unsigned ndigits, num_digit_bytes;
	char *cp;
	int c;

	recno = strtoul(line+1, 0, 10);
	if (recno < 1 || recno > pb_record_count) {
		fprintf(stderr, "%s line %d: record number is out of range\n",
			filename_for_errs, lineno_for_errs);
		return(-1);
	}
	cp = line + 1;
	while (isdigit(*cp))
		cp++;
	if (*cp++ != ':') {
inv_syntax:	fprintf(stderr, "%s line %d: invalid syntax\n",
			filename_for_errs, lineno_for_errs);
		return(-1);
	}
	while (isspace(*cp))
		cp++;
	memset(record, 0xFF, pb_record_len);
	fixp = record + pb_record_len - 14;
	if (digit_char_to_gsm(*cp) < 0)
		goto inv_syntax;
	for (ndigits = 0; ; ndigits++) {
		c = digit_char_to_gsm(*cp);
		if (c < 0)
			break;
		cp++;
		if (ndigits >= 20) {
			fprintf(stderr, "%s line %d: too many number digits\n",
				filename_for_errs, lineno_for_errs);
			return(-1);
		}
		digits[ndigits] = c;
	}
	if (ndigits & 1)
		digits[ndigits++] = 0xF;
	num_digit_bytes = ndigits >> 1;
	fixp[0] = num_digit_bytes + 1;
	pack_digit_bytes(digits, fixp + 2, num_digit_bytes);
	if (*cp++ != ',')
		goto inv_syntax;
	if (cp[0] != '0' || cp[1] != 'x' && cp[1] != 'X' || !isxdigit(cp[2]) ||
	    !isxdigit(cp[3]) || !isspace(cp[4]))
		goto inv_syntax;
	fixp[1] = strtoul(cp, 0, 16);
	cp += 5;
	while (isspace(*cp))
		cp++;
	if (!strncasecmp(cp, "CCP=", 4)) {
		cp += 4;
		fixp[12] = strtoul(cp, 0, 0);
		while (*cp && !isspace(*cp))
			cp++;
		while (isspace(*cp))
			cp++;
	}
	if (!strncasecmp(cp, "EXT=", 4)) {
		cp += 4;
		fixp[13] = strtoul(cp, 0, 0);
		while (*cp && !isspace(*cp))
			cp++;
		while (isspace(*cp))
			cp++;
	}
	if (*cp == '"') {
		cp++;
		cp = decode_qstring_alpha(cp, record, pb_record_len - 14,
					  filename_for_errs, lineno_for_errs);
		if (!cp)
			return(-1);
	} else if (!strncasecmp(cp, "HEX", 3)) {
		cp += 3;
		while (isspace(*cp))
			cp++;
		cp = decode_hex_alpha(cp, record, pb_record_len - 14,
				      filename_for_errs, lineno_for_errs);
		if (!cp)
			return(-1);
	} else
		goto inv_syntax;
	while (isspace(*cp))
		cp++;
	if (*cp)
		goto inv_syntax;
	return update_rec_op(recno, 0x04, record, pb_record_len);
}

cmd_pb_update(argc, argv)
	char **argv;
{
	int rc;
	FILE *inf;
	int lineno;
	char linebuf[1024];

	rc = phonebook_op_common(argv[1]);
	if (rc < 0)
		return(rc);
	inf = fopen(argv[2], "r");
	if (!inf) {
		perror(argv[2]);
		return(-1);
	}
	for (lineno = 1; fgets(linebuf, sizeof linebuf, inf); lineno++) {
		if (!index(linebuf, '\n')) {
			fprintf(stderr,
				"%s line %d: too long or missing newline\n",
				argv[2], lineno);
			fclose(inf);
			return(-1);
		}
		if (linebuf[0] != '#' || !isdigit(linebuf[1]))
			continue;
		rc = process_record(linebuf, curfile_record_len,
				    curfile_record_count, argv[2], lineno);
		if (rc < 0) {
			fclose(inf);
			return(rc);
		}
	}
	fclose(inf);
	return(0);
}