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This commit is contained in:
James Gregory 2013-12-30 18:34:31 +11:00
commit 18011c595a
352 changed files with 6040 additions and 6040 deletions
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28
05-03.md
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@ -15,7 +15,7 @@
#include <alloc.h> /* alloc.h for Borland compilers,
malloc.h for Microsoft compilers */
#define BLOCK_SIZE 0x4000 /* we’ll process the file in 16K blocks */
#define BLOCK_SIZE 0x4000 /* we'll process the file in 16K blocks */
/* Searches the specified number of sequences in the specified
buffer for matches to SearchString of SearchStringLength. Note
@ -42,16 +42,16 @@
also matches */
if ( SearchStringLength == 1 ) {
return(1); /* That one matching character was the whole
search string, so we’ve got a match */
search string, so we've got a match */
}
else {
/* Check whether the remaining characters match */
if ( !memcmp(PotentialMatch + 1, SearchString + 1,
SearchStringLength - 1) ) {
return(1); /* We’ve got a match */
return(1); /* We've got a match */
}
}
/* The string doesn’t match; keep going by pointing past the
/* The string doesn't match; keep going by pointing past the
potential match location we just rejected */
SearchLength -= PotentialMatch - Buffer + 1;
Buffer = PotentialMatch + 1;
@ -79,13 +79,13 @@
/* Check for the proper number of arguments */
if ( argc != 3 ) {
printf(“usage: search filename search-string\n”);
printf("usage: search filename search-string\n");
exit(1);
}
/* Try to open the file to be searched */
if ( (Handle = open(argv[1], O_RDONLY | O_BINARY)) == -1 ) {
printf(“Can’t open file: %s\n”, argv[1]);
printf("Can't open file: %s\n", argv[1]);
exit(1);
}
/* Calculate the length of text to search for */
@ -93,7 +93,7 @@
SearchStringLength = strlen(SearchString);
/* Try to get memory in which to buffer the data */
if ( (WorkingBlock = malloc(BLOCK_SIZE)) == NULL ) {
printf(“Can’t get enough memory\n”);
printf("Can't get enough memory\n");
exit(1);
}
@ -102,7 +102,7 @@
NextLoadPtr = WorkingBlock;
NextLoadCount = BLOCK_SIZE;
Done = 0; /* Not done with search yet */
Found = 0; /* Assume we won’t find a match */
Found = 0; /* Assume we won't find a match */
/* Search the file in BLOCK_SIZE chunks */
do {
/* Read in however many bytes are needed to fill out the block
@ -110,10 +110,10 @@
the rest of the bytes in the file, whichever is less */
if ( (WorkingLength = read(Handle, NextLoadPtr,
NextLoadCount)) == -1 ) {
printf(“Error reading file %s\n”, argv[1]);
printf("Error reading file %s\n", argv[1]);
exit(1);
}
/* If we didn’t read all the bytes we requested, we’re done
/* If we didn't read all the bytes we requested, we're done
after this block, whether we find a match or not */
if ( WorkingLength != NextLoadCount ) {
Done = 1;
@ -132,7 +132,7 @@
WorkingLength - SearchStringLength + 1) <= 0 ) {
Done = 1; /* Too few characters in this block for
there to be any possible matches, so this
is the final block and we’re done without
is the final block and we're done without
finding a match
*/
}
@ -140,7 +140,7 @@
/* Search this block */
if ( SearchForString(WorkingBlock, BlockSearchLength,
SearchString, SearchStringLength) ) {
Found = 1; /* We’ve found a match */
Found = 1; /* We've found a match */
Done = 1;
}
else {
@ -162,9 +162,9 @@
/* Report the results */
if ( Found ) {
printf(“String found\n”);
printf("String found\n");
} else {
printf(“String not found\n”);
printf("String not found\n");
}
exit(Found); /* Return the found/not found status as the
DOS errorlevel */