Merge pull request #389 from IrgendwerA8/stringimprovements

Optimization of string functions (size & speed).
This commit is contained in:
Oliver Schmidt
2017-04-04 15:39:37 +02:00
committed by GitHub
20 changed files with 607 additions and 267 deletions

View File

@@ -1,59 +0,0 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* Test string. Must NOT have duplicate characters! */
static char S[] = "Helo wrd!\n";
static char Found[256];
int main (void)
{
unsigned Len;
unsigned I;
char* P;
/* Print a header */
printf ("strchr(): ");
/* Get the length of the string */
Len = strlen (S);
/* Search for all characters in the string, including the terminator */
for (I = 0; I < Len+1; ++I) {
/* Search for this char */
P = strchr (S, S[I]);
/* Check if we found it */
if (P == 0 || (P - S) != I) {
printf ("Failed for code 0x%02X, offset %u!\n", S[I], I);
printf ("P = %04X offset = %04X\n", P, P-S);
exit (EXIT_FAILURE);
}
/* Mark the char as checked */
Found[S[I]] = 1;
}
/* Search for all other characters and make sure they aren't found */
for (I = 0; I < 256; ++I) {
if (Found[I] == 0) {
if (strchr (S, (char)I) != 0) {
printf ("Failed for code 0x%02X\n", I);
exit (EXIT_FAILURE);
}
}
}
/* Test passed */
printf ("Passed\n");
return EXIT_SUCCESS;
}