45 lines
767 B
Text
45 lines
767 B
Text
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ssize_t
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extract_strings(const char *in, size_t inlen, char **out, size_t outlen)
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{
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const char *inp = in;
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const char *inend = in + inlen;
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char **outp = out;
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char **outend = out + outlen;
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while (inp != inend) {
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size_t len;
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char *s;
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if (outp == outend) {
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errno = ENOSPC;
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goto err;
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}
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len = (unsigned char)*inp;
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++inp;
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if (len > (size_t)(inend - inp)) {
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errno = EINVAL;
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goto err;
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}
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s = malloc(len + 1);
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if (s == NULL) {
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goto err;
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}
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memcpy(s, inp, len);
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inp += len;
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s[len] = '\0';
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*outp = s;
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++outp;
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}
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return outp - out;
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err:
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{
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int errno_old = errno;
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while (out != outp) {
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free(*out);
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++out;
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}
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errno = errno_old;
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}
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return -1;
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}
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