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Handle stretches of blanks. 

Don't create zero-length strings.
This commit is contained in:
Simon Forman 2023-02-01 17:25:54 -08:00
parent 9762502ea6
commit 5118881e6c
1 changed files with 12 additions and 7 deletions
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11
implementations/C/parser.c
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@ -5,7 +5,7 @@
const char *BLANKS = " \t"; const char *BLANKS = " \t";
const char *TEXT = " hi there fr[ie]nd"; const char *TEXT = " hi there fr [ ie]nd";
/* 01234567890123456789 /* 01234567890123456789
^ ^ ^ ^
*/ */
@ -32,18 +32,23 @@ main(void)
while (NULL != rest) { while (NULL != rest) {
/* How many chars have we got? */ /* How many chars have we got? */
diff = rest - text; diff = rest - text;
printf("%ld\n", diff); /*printf("%ld\n", diff);*/
if (diff) {
/* Allocate and copy out the substring. */ /* Allocate and copy out the substring. */
snip = (char *)GC_malloc(diff + 1); snip = (char *)GC_malloc(diff + 1);
strncat(snip, text, diff); strncat(snip, text, diff);
printf("%s\n", snip); printf("%s\n", snip);
}
/* The next char is a space or '[' or ']'. */ /* The next char is a space or '[' or ']'. */
printf("<%c>\n", rest[0]); if ('[' == rest[0] || ']' == rest[0]) {
printf("%c\n", rest[0]);
}
/* */ /* */
text = trim_leading_blanks(++rest); text = trim_leading_blanks(++rest);
/*printf(">>>%s\n\n", text);*/
rest = strpbrk(text, " []"); rest = strpbrk(text, " []");
} }
printf("%s\n", text); printf("%s\n", text);