+
−/*
+
− * This module implements the actual decoding of compressed traces.
+
− */
+
−
+
−#include <sys/types.h>
+
−#include <stdio.h>
+
−#include <ctype.h>
+
−#include <string.h>
+
−#include <strings.h>
+
−#include <stdlib.h>
+
−
+
−extern char *str2ind_tab_filename;
+
−extern int str2ind_array_size;
+
−extern char **str2ind_orig_strings;
+
−extern char **str2ind_param_strings;
+
−
+
−#define	MAX_PRINTF_PARAMS	16
+
−
+
−static int cindex, cindex_nchars;
+
−static u_char param_bytes_array[256];
+
−static int param_bytes_count;
+
−static char *format_string, *param_type_string;
+
−static int num_printf_params;
+
−static u_long printf_params[MAX_PRINTF_PARAMS];
+
−static char output_buf[2048];
+
−
+
−decode_hex_digit(c)
+
−{
+
−	if (isdigit(c))
+
−		return(c - '0');
+
−	else if (isupper(c))
+
−		return(c - 'A' + 10);
+
−	else
+
−		return(c - 'a' + 10);
+
−}
+
−
+
−static int
+
−decode_idx_and_params(line)
+
−	char *line;
+
−{
+
−	char *cp;
+
−	u_char *dp;
+
−
+
−	for (cp = line; isdigit(*cp); cp++)
+
−		;
+
−	if (*cp && *cp != ' ')
+
−		return(-1);
+
−	cindex = atoi(line);
+
−	cindex_nchars = cp - line;
+
−	for (dp = param_bytes_array; *cp; ) {
+
−		if (*cp++ != ' ')
+
−			return(-1);
+
−		if (!isxdigit(cp[0]) || !isxdigit(cp[1]))
+
−			return(-1);
+
−		*dp++ = decode_hex_digit(cp[0]) << 4 | decode_hex_digit(cp[1]);
+
−		cp += 2;
+
−	}
+
−	param_bytes_count = dp - param_bytes_array;
+
−	return(0);
+
−}
+
−
+
−static void
+
−decode_parameters(filename_for_errs, lineno_for_errs)
+
−	char *filename_for_errs;
+
−{
+
−	int pi, type;
+
−	u_char *bp, *endp;
+
−
+
−	bp = param_bytes_array;
+
−	endp = bp + param_bytes_count;
+
−	for (pi = 0; pi < num_printf_params; pi++) {
+
−		type = param_type_string[pi];
+
−		switch (type) {
+
−		case 'c':
+
−			if (bp >= endp) {
+
−wrong_param_byte_count:		fprintf(stderr,
+
−	"%s line %d: wrong number of parameter bytes for %s entry #%d\n",
+
−					filename_for_errs, lineno_for_errs,
+
−					str2ind_tab_filename, cindex);
+
−				exit(1);
+
−			}
+
−			printf_params[pi] = *bp++;
+
−			continue;
+
−		case 'i':
+
−		case 'p':
+
−		case '*':
+
−			if (bp > endp - 4)
+
−				goto wrong_param_byte_count;
+
−			printf_params[pi] = (u_long) bp[0] |
+
−					    (u_long) bp[1] << 8 |
+
−					    (u_long) bp[2] << 16 |
+
−					    (u_long) bp[3] << 24;
+
−			bp += 4;
+
−			continue;
+
−		case 's':
+
−			printf_params[pi] = (u_long) bp;
+
−			for (;;) {
+
−				if (bp >= endp) {
+
−					fprintf(stderr,
+
−	"%s line %d: unterminated string parameter in compressed trace\n",
+
−						filename_for_errs,
+
−						lineno_for_errs);
+
−					exit(1);
+
−				}
+
−				if (!*bp++)
+
−					break;
+
−			}
+
−			continue;
+
−		default:
+
−			fprintf(stderr,
+
−			"%s entry #%d: parameter type \'%c\' not supported\n",
+
−				str2ind_tab_filename, cindex, type);
+
−			exit(1);
+
−		}
+
−	}
+
−	if (bp != endp)
+
−		goto wrong_param_byte_count;
+
−}
+
−
+
−process_ctrace_line(line, cindex_offset, filename_for_errs, lineno_for_errs)
+
−	char *line, *filename_for_errs;
+
−{
+
−	if (decode_idx_and_params(line + cindex_offset) < 0) {
+
−		fprintf(stderr,
+
−			"%s line %d: unable to decode compressed trace line\n",
+
−			filename_for_errs, lineno_for_errs);
+
−		exit(1);
+
−	}
+
−	if (cindex >= str2ind_array_size) {
+
−		fprintf(stderr,
+
−			"%s line %d: index %d exceeds the range of %s\n",
+
−			filename_for_errs, lineno_for_errs, cindex,
+
−			str2ind_tab_filename);
+
−		exit(1);
+
−	}
+
−	format_string = str2ind_orig_strings[cindex];
+
−	param_type_string = str2ind_param_strings[cindex];
+
−	num_printf_params = strlen(param_type_string);
+
−	if (num_printf_params > MAX_PRINTF_PARAMS) {
+
−		fprintf(stderr,
+
−			"error: entry #%d in %s has too many parameters\n",
+
−			cindex, str2ind_tab_filename);
+
−		exit(1);
+
−	}
+
−	decode_parameters(filename_for_errs, lineno_for_errs);
+
−	ind2str_doprnt(format_string, printf_params, output_buf);
+
−	printf("%.*s \"%s\"\n", cindex_offset + cindex_nchars, line,
+
−		output_buf);
+
−	return(0);
+
−}