Description:
This is a grab bag of functions for string operations, designed to enhance
the standard string.h.
Note that if you define CCAN_STR_DEBUG, you will get extra compile
checks on common misuses of the following functions (they will now
be out-of-line, so there is a runtime penalty!).
strstr, strchr, strrchr:
Return const char * if first argument is const (gcc only).
isalnum, isalpha, isascii, isblank, iscntrl, isdigit, isgraph,
islower, isprint, ispunct, isspace, isupper, isxdigit:
Static and runtime check that input is EOF or an *unsigned*
char, as per C standard (really!).
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Example: #include <stdio.h>
#include <ccan/str/str.h>
int main(int argc, char *argv[])
{
if (argv[1] && streq(argv[1], "--verbose"))
printf("verbose set\n");
if (argv[1] && strstarts(argv[1], "--"))
printf("Some option set\n");
if (argv[1] && strends(argv[1], "cow-powers"))
printf("Magic option set\n");
return 0;
}
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