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Nice skeleton of parser.

This commit is contained in:
Simon Forman 2023-02-01 17:17:35 -08:00
parent 6694d3d596
commit 9762502ea6
1 changed files with 11 additions and 3 deletions
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14
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
^ ^ ^ ^
*/ */
@ -30,12 +30,20 @@ main(void)
text = trim_leading_blanks((char *)TEXT); text = trim_leading_blanks((char *)TEXT);
rest = strpbrk(text, " []"); rest = strpbrk(text, " []");
while (NULL != rest) { while (NULL != rest) {
/* How many chars have we got? */
diff = rest - text; diff = rest - text;
printf("%ld\n", diff); printf("%ld\n", diff);
/* 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 <%c>\n", snip, rest[0]); printf("%s\n", snip);
text = ++rest;
/* The next char is a space or '[' or ']'. */
printf("<%c>\n", rest[0]);
/* */
text = trim_leading_blanks(++rest);
rest = strpbrk(text, " []"); rest = strpbrk(text, " []");
} }
printf("%s\n", text); printf("%s\n", text);