70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
// Filename: check_include.cxx
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// Created by: drose (16Oct00)
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//
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////////////////////////////////////////////////////////////////////
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#include "check_include.h"
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////////////////////////////////////////////////////////////////////
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// Function: check_include
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// Description: Checks to see if the given line is a C/C++ #include
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// directive. If it is, returns the named filename;
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// otherwise, returns the empty string.
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////////////////////////////////////////////////////////////////////
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string
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check_include(const string &line) {
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// Skip initial whitespace on the line.
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size_t p = 0;
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while (p < line.length() && isspace(line[p])) {
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p++;
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}
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if (p >= line.length() || line[p] != '#') {
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// No hash mark.
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return string();
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}
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// We have a hash mark! Skip more whitespace.
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p++;
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while (p < line.length() && isspace(line[p])) {
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p++;
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}
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if (p >= line.length() || !(line.substr(p, 7) == "include")) {
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// Some other directive, not #include.
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return string();
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}
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// It's an #include directive! Skip more whitespace.
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p += 7;
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while (p < line.length() && isspace(line[p])) {
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p++;
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}
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// note: ppremake cant expand cpp #define vars used as include targets yet
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if (p >= line.length() || (line[p] != '"' && line[p] != '<')) {
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// if it starts with a capital, assume its a #define var used as
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// include tgt, and don't print a warning
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if(!((line[p]>='A')&&(line[p]<='Z'))) {
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cerr << "Ignoring invalid #include directive: " << line << "\n";
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}
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return string();
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}
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char close = (line[p] == '"') ? '"' : '>';
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p++;
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// Now get the filename.
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size_t q = p;
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while (q < line.length() && line[q] != close) {
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q++;
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}
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if (q >= line.length()) {
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cerr << "Ignoring invalid #include directive: " << line << "\n";
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return string();
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}
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return line.substr(p, q - p);
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}
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