ref: 6972974f8df3ead3043185c046b7871110b85b79
dir: /sys/src/ape/lib/bsd/strcasecmp.c/
#include <string.h> typedef unsigned char uchar; int strcasecmp(char *s1, char *s2) { int c1, c2; while(*s1){ c1 = *(uchar*)s1++; c2 = *(uchar*)s2++; if(c1 == c2) continue; if(c1 >= 'A' && c1 <= 'Z') c1 -= 'A' - 'a'; if(c2 >= 'A' && c2 <= 'Z') c2 -= 'A' - 'a'; if(c1 != c2) return c1 - c2; } return -*s2; }