mspdebug/util/util.c

337 lines
5.9 KiB
C

/* MSPDebug - debugging tool for MSP430 MCUs
* Copyright (C) 2009, 2010 Daniel Beer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <assert.h>
#include <time.h>
#ifdef __Windows__
#include <windows.h>
#endif
#include "util.h"
#include "output.h"
char *get_arg(char **text)
{
char *start;
char *rewrite;
char *end;
int qstate = 0;
int qval = 0;
if (!text)
return NULL;
start = *text;
while (*start && isspace(*start))
start++;
if (!*start)
return NULL;
/* We've found the start of the argument. Parse it. */
end = start;
rewrite = start;
while (*end) {
switch (qstate) {
case 0: /* Bare */
if (isspace(*end))
goto out;
else if (*end == '"')
qstate = 1;
else
*(rewrite++) = *end;
break;
case 1: /* In quotes */
if (*end == '"')
qstate = 0;
else if (*end == '\\')
qstate = 2;
else
*(rewrite++) = *end;
break;
case 2: /* Backslash */
if (*end == '\\')
*(rewrite++) = '\\';
else if (*end == 'n')
*(rewrite++) = '\n';
else if (*end == 'r')
*(rewrite++) = '\r';
else if (*end == 't')
*(rewrite++) = '\t';
else if (*end >= '0' && *end <= '3') {
qstate = 30;
qval = *end - '0';
} else if (*end == 'x') {
qstate = 40;
qval = 0;
} else
*(rewrite++) = *end;
if (qstate == 2)
qstate = 1;
break;
case 30: /* Octal */
case 31:
if (*end >= '0' && *end <= '7')
qval = (qval << 3) | (*end - '0');
if (qstate == 31) {
*(rewrite++) = qval;
qstate = 1;
} else {
qstate++;
}
break;
case 40: /* Hex */
case 41:
if (isdigit(*end))
qval = (qval << 4) | (*end - '0');
else if (isupper(*end))
qval = (qval << 4) | (*end - 'A' + 10);
else if (islower(*end))
qval = (qval << 4) | (*end - 'a' + 10);
if (qstate == 41) {
*(rewrite++) = qval;
qstate = 1;
} else {
qstate++;
}
break;
}
end++;
}
out:
/* Leave the text pointer at the end of the next argument */
while (*end && isspace(*end))
end++;
*rewrite = 0;
*text = end;
return start;
}
void debug_hexdump(const char *label, const uint8_t *data, int len)
{
int offset = 0;
printc("%s [0x%x bytes]\n", label, len);
while (offset < len) {
int i;
printc(" ");
for (i = 0; i < 16 && offset + i < len; i++)
printc("%02x ", data[offset + i]);
printc("\n");
offset += i;
}
}
int hexval(int c)
{
if (isdigit(c))
return c - '0';
if (isupper(c))
return c - 'A' + 10;
if (islower(c))
return c - 'a' + 10;
return 0;
}
#ifdef __Windows__
char *strsep(char **strp, const char *delim)
{
char *start = *strp;
char *end = start;
if (!start)
return NULL;
while (*end) {
const char *d = delim;
while (*d) {
if (*d == *end) {
*(end++) = 0;
*strp = end;
return start;
}
d++;
}
end++;
}
*strp = NULL;
return start;
}
#endif
#ifdef __Windows__
const char *last_error(void)
{
DWORD err = GetLastError();
static char msg_buf[128];
int len;
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err, 0,
msg_buf, sizeof(msg_buf), NULL);
/* Trim trailing newline characters */
len = strlen(msg_buf);
while (len > 0 && isspace(msg_buf[len - 1]))
len--;
msg_buf[len] = 0;
return msg_buf;
}
#else
const char *last_error(void)
{
return strerror(errno);
}
#endif
/* Expand leading `~/' in path names. Caller must free the returned ptr */
char *expand_tilde(const char *path)
{
char *home, *expanded;
size_t len;
if (!path)
return NULL;
if (!*path)
return strdup("");
expanded = NULL;
if (*path == '~' && *(path + 1) == '/') {
home = getenv("HOME");
if (home) {
/* Trailing '\0' will fit in leading '~'s place */
len = strlen(home) + strlen(path);
expanded = (char *)malloc(len);
if (expanded)
snprintf(expanded, len, "%s%s", home, path + 1);
else
printc_err("%s: malloc: %s\n", __FUNCTION__,
last_error());
} else {
printc_err("%s: getenv: %s\n", __FUNCTION__,
last_error());
}
} else {
expanded = strdup(path);
if (!expanded)
printc_err("%s: malloc: %s\n", __FUNCTION__,
last_error());
}
/* Caller must free()! */
return expanded;
}
#ifdef __Windows__
int delay_s(unsigned int s)
{
Sleep(s * 1000);
return 0;
}
int delay_ms(unsigned int s)
{
Sleep(s);
return 0;
}
#else
int delay_s(unsigned int s)
{
return sleep(s);
}
int delay_ms(unsigned int s)
{
struct timespec ts;
ts.tv_sec = s / 1000;
ts.tv_nsec = (s % 1000) * 1000000;
return nanosleep(&ts, NULL);
}
#endif
int base64_encode(const uint8_t *src, int len, char *dst, int max_len)
{
static const char basis[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"abcdefghijklmnopqrstuvwxyz0123456789+/";
int i = 0;
int k = 0;
while ((i < len) && (k + 4) < max_len) {
int a = src[i++];
dst[k++] = basis[a >> 2];
if (i < len) {
int b = src[i++];
dst[k++] = basis[((a & 3) << 4) | (b & 0xf0) >> 4];
if (i < len) {
int c = src[i++];
dst[k++] = basis[((b & 0xf) << 2) |
((c & 0xc0) >> 6)];
dst[k++] = basis[c & 0x3f];
} else {
dst[k++] = basis[(b & 0xf) << 2];
dst[k++] = '=';
}
} else {
dst[k++] = basis[(a & 3) << 4];
dst[k++] = '=';
dst[k++] = '=';
}
}
dst[k] = 0;
return i;
}