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/*
* nvidia-settings: A tool for configuring the NVIDIA X driver on Unix
* and Linux systems.
*
* Copyright (C) 2004 NVIDIA Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of Version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* 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 Version 2
* of 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.
* 59 Temple Place - Suite 330
* Boston, MA 02111-1307, USA
*
*/
#include "msg.h"
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#if defined(__sun)
#include <sys/termios.h>
#endif
static void format(FILE*, const char*, char *);
static int get_terminal_width(void);
#define NV_FORMAT(stream, prefix, fmt) \
do { \
char *buf; \
NV_VSNPRINTF(buf, fmt); \
format(stream, prefix, buf); \
free (buf); \
} while(0)
/*
* nv_error_msg() - print an error message, nicely formatted using the
* format() function.
*/
void nv_error_msg(const char *fmt, ...)
{
fprintf(stderr, "\n");
NV_FORMAT(stderr, "ERROR: ", fmt);
fprintf(stderr, "\n");
} /* nv_error_msg() */
/*
* nv_warning_msg() - print a warning message, nicely formatted using
* the format() function.
*/
void nv_warning_msg(const char *fmt, ...)
{
fprintf(stdout, "\n");
NV_FORMAT(stdout, "WARNING: ", fmt);
fprintf(stdout, "\n");
} /* nv_warning_msg() */
/*
* nv_msg() - print a message, nicely formatted using the format()
* function.
*/
void nv_msg(const char *prefix, const char *fmt, ...)
{
NV_FORMAT(stdout, prefix, fmt);
} /* nv_msg() */
/*
* XXX gcc's '-ansi' option causes vsnprintf to not be defined, so
* declare the prototype here.
*/
#if defined(__STRICT_ANSI__)
int vsnprintf(char *str, size_t size, const char *format,
va_list ap);
#endif
/*
* format() - formats and prints the string buf so that no more than
* 80 characters are printed across.
*/
static void format(FILE *stream, const char *prefix,
char *buf)
{
int len, prefix_len, z, w, i, max_width;
char *line, *local_prefix, *a, *b, *c;
max_width = get_terminal_width();
/* loop until we've printed the entire string */
z = strlen(buf);
a = buf;
if (prefix) {
prefix_len = strlen(prefix);
local_prefix = malloc(prefix_len+1);
strcpy(local_prefix, prefix);
} else {
prefix_len = 0;
local_prefix = NULL;
}
do {
w = max_width;
/* adjust the max width for any prefix */
w -= prefix_len;
/*
* if the string will fit on one line, point b to the end of the
* string
*/
if (z < w) b = a + z;
/*
* if the string won't fit on one line, move b to where the end of
* the line should be, and then move b back until we find a space;
* if we don't find a space before we back b all the way up to a, start
* b at a, and move forward until we do find a space
*/
else {
b = a + w;
while ((b >= a) && (!isspace(*b))) b--;
if (b <= a) {
b = a;
while (!isspace(*b)) b++;
}
}
/* look for any newline in the line, and move b to it */
for (c = a; c < b; c++) if (*c=='\n') { b = c; break; }
/* print the string that starts at a and ends at b */
/*
* XXX this could be done just by temporarily overwriting b
* with '\0'
*/
len = b-a;
line = malloc(len+1);
strncpy(line, a, len);
line[len] = '\0';
if (local_prefix) {
fprintf(stream, "%s%s\n", local_prefix, line);
} else {
fprintf(stream, "%s\n", line);
}
free(line);
/*
* adjust the length of the string and move the pointer to the
* beginning of the new line
*/
z -= (b - a + 1);
a = b + 1;
/* move to the first non whitespace character */
while ((z > 0) && (isspace(*a))) a++, z--;
if (local_prefix) {
for (i = 0; i < prefix_len; i++) local_prefix[i] = ' ';
}
} while (z > 0);
if (local_prefix) free (local_prefix);
} /* format() */
#define DEFAULT_MAX_WIDTH 75
static int get_terminal_width(void)
{
struct winsize ws;
if (ioctl(STDERR_FILENO, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) {
return DEFAULT_MAX_WIDTH;
} else {
return (ws.ws_col - 1);
}
}
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