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48 lines
2.4 KiB
C
48 lines
2.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/ctype.h"
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#include "libc/stdckdint.h"
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#include "libc/str/str.h"
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#include "net/http/http.h"
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/**
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* Parses Content-Length header.
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*
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* @param size is byte length and -1 implies strlen
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* @return -1 on invalid or overflow, otherwise >=0 value
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*/
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int64_t ParseContentLength(const char *s, size_t n) {
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size_t i;
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int64_t r;
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if (n == -1)
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n = s ? strlen(s) : 0;
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if (!n)
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return -1;
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for (r = i = 0; i < n; ++i) {
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if (s[i] == ',' && i > 0)
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break;
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if (!isdigit(s[i]))
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return -1;
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r *= 10;
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r += s[i] - '0';
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if (r > 0x000000ffffffffff)
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return -1;
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}
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return r;
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}
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