08-07-2012
Quote:
Originally Posted by
alister
This is trivial with ed. Just use the global-non-matched command, v, to mark every line that does not contain $(BB), then perform the substitution, s, on those lines.
Regards,
Alister
Is it possible with sed or awk? I want directly change the file
Lei
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
How to change ip using awk or sed .
#cat /etc/hosts
10.151.5.1 server1
10.151.5.2 server2
10.151.5.3 server3
10.151.5.4 server4
10.151.5.5 server5
Output:
10.151.5.1 server1
10.181.5.2 server2
10.151.5.3 server3
10.181.5.4 server4
10.181.5.5 server5 (9 Replies)
Discussion started by: kenshinhimura
9 Replies
2. Shell Programming and Scripting
Hi, i want to change a subs. value in a file, with using a script..
this is my script... (example)
#!/bin/bash
NDIR=`zenity --file-selection --directory`
mv $HOME/Desktop/myfile /tmp/myfile.temp
XT='"'
perl -pe "s/.*/DIR=$XT`echo -e "$NDIR"`$XT/ if $. == 40" <... (2 Replies)
Discussion started by: excsra
2 Replies
3. Shell Programming and Scripting
Hi Gurus,
I am working with a korn shell script. I should replace in a very great file the character ";" with a space.
Example:
2750;~
2734;~
2778;~
2751;~
2751;~
2752;~
what the fastest method is? Sed? Awk?
Speed is dead main point, Seen the dimensions of the files
Thanks (6 Replies)
Discussion started by: GERMANICO
6 Replies
4. Shell Programming and Scripting
Hi,
Need help with a sed command that I am using to substitute 3 positions of a pipe delimited file.
i am getting different results while substituting the same position of two different files with the same value. Please see details below:
$ cat chk2
... (3 Replies)
Discussion started by: vmenon
3 Replies
5. Shell Programming and Scripting
Hi guys,
been scratching round the forums and my mountain of resources.
Maybe I havn't read deep enough
My question is not how sed edits a stream and outputs it to a file, rather something like this below:
I have a .txt with some text in it :rolleyes:
abc:123:xyz
123:abc:987... (7 Replies)
Discussion started by: the0nion
7 Replies
6. Shell Programming and Scripting
Hi,
I have file1 like this:
a 64
b 66
c 67and file2 like this:
@1234
1123
aabbcc
@5453
5543
ccbaI want to replace each letter of the third line in file2 with corresponding number in file1. So desired output is,
@1234
1123
646466666767
@5453
5543
67676664I tried something like... (4 Replies)
Discussion started by: polsum
4 Replies
7. Shell Programming and Scripting
Hello.
I am trying to modify a config file which is in windows *.ini type file.
I have found a piece of code here :linux - Edit file in unix using SED - Stack Overflow
As I can't make it doing the job , I am trying to find a solution step by step.
here a modified sample file : my_sample.ini... (1 Reply)
Discussion started by: jcdole
1 Replies
8. Shell Programming and Scripting
I have a csv file formatted like this:
2014-08-21 18:06:26,A,B,12345,123,C,1232,26/08/14 18:07and I'm trying to change it to MM/DD/YYYY HH:MM for both occurances.
I have got this:
awk -F, 'NR <=1 {print;next}{"date +%d/%m/%Y\" \"%H:%m -d\""$1 "\""| getline dte;$1=dte}1' OFS="," test.csvThis... (6 Replies)
Discussion started by: say170
6 Replies
9. Shell Programming and Scripting
OSX
I have been grinding my teeth on a portion of code. I am building a bash script that edits a html email template. In the template, I have place holders for SED (or whatever program is appropriate) to use as anchors for find and replace, with user defined corresponding html code. The HTML code... (3 Replies)
Discussion started by: sudo
3 Replies
10. UNIX for Beginners Questions & Answers
Hi I want to use sed to change a text files input into an awk script.
For example if the input says " chord -- english " I want to change this using sed 's/pattern 1 /pattern 2 /'g filename but I don't understand how to use part of the pattern 1 to input that into pattern 2 . Like after... (10 Replies)
Discussion started by: enforcer
10 Replies
LEARN ABOUT DEBIAN
sdl_pixelformat
SDL_PixelFormat(3) SDL API Reference SDL_PixelFormat(3)
NAME
SDL_PixelFormat - Stores surface format information
STRUCTURE DEFINITION
typedef struct SDL_PixelFormat {
SDL_Palette *palette;
Uint8 BitsPerPixel;
Uint8 BytesPerPixel;
Uint8 Rloss, Gloss, Bloss, Aloss;
Uint8 Rshift, Gshift, Bshift, Ashift;
Uint32 Rmask, Gmask, Bmask, Amask;
Uint32 colorkey;
Uint8 alpha;
} SDL_PixelFormat;
STRUCTURE DATA
palette Pointer to the palette, or NULL if the BitsPerPixel>8
BitsPerPixel The number of bits used to represent each pixel in a surface. Usually 8, 16, 24 or 32.
BytesPerPixel The number of bytes used to represent each pixel in a surface. Usually one to four.
[RGBA]mask Binary mask used to retrieve individual color values
[RGBA]loss Precision loss of each color component (2^[RGBA]loss)
[RGBA]shift Binary left shift of each color component in the pixel value
colorkey Pixel value of transparent pixels
alpha Overall surface alpha value
DESCRIPTION
A SDL_PixelFormat describes the format of the pixel data stored at the pixels field of a SDL_Surface. Every surface stores a SDL_PixelFor-
mat in the format field.
If you wish to do pixel level modifications on a surface, then understanding how SDL stores its color information is essential.
8-bit pixel formats are the easiest to understand. Since its an 8-bit format, we have 8 BitsPerPixel and 1 BytesPerPixel. Since BytesPer-
Pixel is 1, all pixels are represented by a Uint8 which contains an index into palette->colors. So, to determine the color of a pixel in a
8-bit surface: we read the color index from surface->pixels and we use that index to read the SDL_Color structure from surface->for-
mat->palette->colors. Like so:
SDL_Surface *surface;
SDL_PixelFormat *fmt;
SDL_Color *color;
Uint8 index;
.
.
/* Create surface */
.
.
fmt=surface->format;
/* Check the bitdepth of the surface */
if(fmt->BitsPerPixel!=8){
fprintf(stderr, "Not an 8-bit surface.
");
return(-1);
}
/* Lock the surface */
SDL_LockSurface(surface);
/* Get the topleft pixel */
index=*(Uint8 *)surface->pixels;
color=fmt->palette->colors[index];
/* Unlock the surface */
SDL_UnlockSurface(surface);
printf("Pixel Color-> Red: %d, Green: %d, Blue: %d. Index: %d
",
color->r, color->g, color->b, index);
.
.
Pixel formats above 8-bit are an entirely different experience. They are considered to be "TrueColor" formats and the color information is
stored in the pixels themselves, not in a palette. The mask, shift and loss fields tell us how the color information is encoded. The mask
fields allow us to isolate each color component, the shift fields tell us the number of bits to the right of each component in the pixel
value and the loss fields tell us the number of bits lost from each component when packing 8-bit color component in a pixel.
/* Extracting color components from a 32-bit color value */
SDL_PixelFormat *fmt;
SDL_Surface *surface;
Uint32 temp, pixel;
Uint8 red, green, blue, alpha;
.
.
.
fmt=surface->format;
SDL_LockSurface(surface);
pixel=*((Uint32*)surface->pixels);
SDL_UnlockSurface(surface);
/* Get Red component */
temp=pixel&fmt->Rmask; /* Isolate red component */
temp=temp>>fmt->Rshift;/* Shift it down to 8-bit */
temp=temp<<fmt->Rloss; /* Expand to a full 8-bit number */
red=(Uint8)temp;
/* Get Green component */
temp=pixel&fmt->Gmask; /* Isolate green component */
temp=temp>>fmt->Gshift;/* Shift it down to 8-bit */
temp=temp<<fmt->Gloss; /* Expand to a full 8-bit number */
green=(Uint8)temp;
/* Get Blue component */
temp=pixel&fmt->Bmask; /* Isolate blue component */
temp=temp>>fmt->Bshift;/* Shift it down to 8-bit */
temp=temp<<fmt->Bloss; /* Expand to a full 8-bit number */
blue=(Uint8)temp;
/* Get Alpha component */
temp=pixel&fmt->Amask; /* Isolate alpha component */
temp=temp>>fmt->Ashift;/* Shift it down to 8-bit */
temp=temp<<fmt->Aloss; /* Expand to a full 8-bit number */
alpha=(Uint8)temp;
printf("Pixel Color -> R: %d, G: %d, B: %d, A: %d
", red, green, blue, alpha);
.
.
.
SEE ALSO
SDL_Surface, SDL_MapRGB
SDL
Tue 11 Sep 2001, 23:01 SDL_PixelFormat(3)