43 lines
934 B
C
43 lines
934 B
C
#include <stddef.h>
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#include <stdio.h>
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#include <string.h>
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#include <gc.h>
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const char *BLANKS = " \t";
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const char *TEXT = " hi there fr[ie]nd";
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/* 01234567890123456789
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^ ^
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*/
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char *
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trim_leading_blanks(char *str)
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{
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size_t offset = strspn(str, BLANKS);
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if (offset == strlen(str)) {
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/* All blanks. */
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return NULL;
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}
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return str + offset;
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}
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int
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main(void)
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{
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char *rest, *text, *snip;
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ptrdiff_t diff;
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text = trim_leading_blanks((char *)TEXT);
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rest = strpbrk(text, " []");
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while (NULL != rest) {
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diff = rest - text;
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printf("%ld\n", diff);
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snip = (char *)GC_malloc(diff + 1);
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strncat(snip, text, diff);
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printf("%s <%c>\n", snip, rest[0]);
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text = ++rest;
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rest = strpbrk(text, " []");
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}
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printf("%s\n", text);
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}
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