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296b679d6e
Preparing to refactor some pattern searching code to use these instead of their own memchr loops. This should simplify the code that replaces PCRE.
109 lines
3.1 KiB
C++
109 lines
3.1 KiB
C++
#include <iostream>
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#include <qpdf/BufferInputSource.hh>
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#include <qpdf/PointerHolder.hh>
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#include <qpdf/Buffer.hh>
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#include <qpdf/QPDFTokenizer.hh>
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static PointerHolder<Buffer>
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get_buffer()
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{
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size_t size = 3172;
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PointerHolder<Buffer> b(new Buffer(size));
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unsigned char* p = b->getBuffer();
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for (size_t i = 0; i < size; ++i)
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{
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p[i] = static_cast<unsigned char>(i & 0xff);
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}
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return b;
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}
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class Finder: public InputSource::Finder
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{
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public:
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Finder(PointerHolder<InputSource> is, std::string const& after) :
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is(is),
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after(after)
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{
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}
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virtual ~Finder()
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{
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}
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virtual bool check();
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private:
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PointerHolder<InputSource> is;
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std::string after;
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};
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bool
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Finder::check()
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{
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QPDFTokenizer tokenizer;
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QPDFTokenizer::Token t = tokenizer.readToken(is, "finder", true);
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if (t == QPDFTokenizer::Token(QPDFTokenizer::tt_word, "potato"))
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{
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t = tokenizer.readToken(is, "finder", true);
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return (t == QPDFTokenizer::Token(QPDFTokenizer::tt_word, after));
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}
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return false;
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}
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void check(char const* description, bool expected, bool actual)
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{
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std::cout << description << ": "
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<< ((actual == expected) ? "PASS" : "FAIL")
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<< std::endl;
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}
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int main()
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{
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PointerHolder<Buffer> b1 = get_buffer();
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unsigned char* b = b1->getBuffer();
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// Straddle block boundaries
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memcpy(b + 1022, "potato", 6);
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// Overlap so that the first check() would advance past the start
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// of the next match
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memcpy(b + 2037, "potato potato salad ", 20);
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PointerHolder<InputSource> is =
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new BufferInputSource("test buffer input source", b1.getPointer());
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Finder f1(is, "salad");
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check("find potato salad", true,
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is->findFirst("potato", 0, 0, f1));
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check("barely find potato salad", true,
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is->findFirst("potato", 1100, 945, f1));
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check("barely find potato salad", true,
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is->findFirst("potato", 2000, 45, f1));
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check("potato salad is too late", false,
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is->findFirst("potato", 1100, 944, f1));
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check("potato salad is too late", false,
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is->findFirst("potato", 2000, 44, f1));
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check("potato salad not found", false,
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is->findFirst("potato", 2045, 0, f1));
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check("potato salad not found", false,
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is->findFirst("potato", 0, 1, f1));
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// Put one more right at EOF
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memcpy(b + b1->getSize() - 12, "potato salad", 12);
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check("potato salad at EOF", true,
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is->findFirst("potato", 3000, 0, f1));
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is->findFirst("potato", 0, 0, f1);
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check("findFirst found first", true,
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is->tell() == 2056);
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check("findLast found potato salad", true,
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is->findLast("potato", 0, 0, f1));
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check("findLast found at EOF", true,
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is->tell() == 3172);
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// Make check() bump into EOF
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memcpy(b + b1->getSize() - 6, "potato", 6);
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check("potato but not salad salad at EOF", false,
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is->findFirst("potato", 3000, 0, f1));
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check("findLast found potato salad", true,
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is->findLast("potato", 0, 0, f1));
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check("findLast found first one", true,
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is->tell() == 2056);
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return 0;
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}
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