SW006013 Microchip Technology, SW006013 Datasheet - Page 69

• Manufacturer Part Number: SW006013
• Description: MPLAB C Compiler For DsPIC DSCs
• Manufacturer: Microchip Technology
• Series: DsPIC30F/33Fr
• Type: MPLAB® C Compilerr

Specifications of SW006013

• Supported Families: DsPIC30F, DsPIC33F
• Core Architecture: DsPIC
• Kit Contents: Software And Docs
• Mcu Supported Families: DsPIC30F And DsPIC33F
• Tool Function: Compiler
• Tool Type: Compiler
• Processor Series: dsPIC
• Lead Free Status / RoHS Status: na
• For Use With/related Products: dSPIC DSCs
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

© 2008 Microchip Technology Inc.
fseek (Continued)
fsetpos
Description:
Include:
Prototype:
Arguments:
Return Value:
Remarks:
}
Output:
"This is the beginning"
"this is the middle and this is the end."
"this is the end."
Explanation:
The file afile.out is created with the text, “This is the beginning, this
is the middle and this is the end”.
The function fseek uses an offset of zero and SEEK_SET to set the file
pointer to the beginning of the file. fgets then reads 22 characters
which are “This is the beginning”, and adds a null character to the
string.
Next, fseek uses an offset of two and SEEK_CURRENT to set the file
pointer to the current position plus two (skipping the comma and
space). fgets then reads up to the next 70 characters. The first 39
characters are “this is the middle and this is the end”. It stops when it
reads EOF and adds a null character to the string.
FInally, fseek uses an offset of negative 16 characters and SEEK_END
to set the file pointer to 16 characters from the end of the file. fgets
then reads up to 70 characters. It stops at the EOF after reading 16
characters “this is the end”. and adds a null character to the string.
Sets the stream's file position.
<stdio.h>
int fsetpos(FILE *stream, const fpos_t *pos);
stream
pos
to fgetpos
Returns 0 if successful; otherwise, returns a non-zero value.
The function sets the file-position indicator for the given stream in *pos
if successful; otherwise, fsetpos sets errno.
}
y = fseek(myfile, -16L, SEEK_END);
if (y)
else
{
}
fclose(myfile);
perror("Fseek failed");
fgets(s, 70, myfile);
printf("\"%s\"\n", s);
target stream
position-indicator storage as returned by an earlier call
DS51456E-page 65