Change the name of SkFlags to SkCommandLineFlags.

tools/SkFlags.cpp

-/*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkFlags.h"
-
-static bool string_is_in(const char* target, const char* set[], size_t len) {
-    for (size_t i = 0; i < len; i++) {
-        if (0 == strcmp(target, set[i])) {
-            return true;
-        }
-    }
-    return false;
-}
-
-/**
- *  Check to see whether string represents a boolean value.
- *  @param string C style string to parse.
- *  @param result Pointer to a boolean which will be set to the value in the string, if the
- *      string represents a boolean.
- *  @param boolean True if the string represents a boolean, false otherwise.
- */
-static bool parse_bool_arg(const char* string, bool* result) {
-    static const char* trueValues[] = { "1", "TRUE", "true" };
-    if (string_is_in(string, trueValues, SK_ARRAY_COUNT(trueValues))) {
-        *result = true;
-        return true;
-    }
-    static const char* falseValues[] = { "0", "FALSE", "false" };
-    if (string_is_in(string, falseValues, SK_ARRAY_COUNT(falseValues))) {
-        *result = false;
-        return true;
-    }
-    SkDebugf("Parameter \"%s\" not supported.\n", string);
-    return false;
-}
-
-bool SkFlagInfo::match(const char* string) {
-    if (SkStrStartsWith(string, '-') && strlen(string) > 1) {
-        string++;
-        // Allow one or two dashes
-        if (SkStrStartsWith(string, '-') && strlen(string) > 1) {
-            string++;
-        }
-        if (kBool_FlagType == fFlagType) {
-            // In this case, go ahead and set the value.
-            if (fName.equals(string) || fShortName.equals(string)) {
-                *fBoolValue = true;
-                return true;
-            }
-            if (SkStrStartsWith(string, "no") && strlen(string) > 2) {
-                string += 2;
-                if (fName.equals(string) || fShortName.equals(string)) {
-                    *fBoolValue = false;
-                    return true;
-                }
-                return false;
-            }
-            int equalIndex = SkStrFind(string, "=");
-            if (equalIndex > 0) {
-                // The string has an equal sign. Check to see if the string matches.
-                SkString flag(string, equalIndex);
-                if (flag.equals(fName) || flag.equals(fShortName)) {
-                    // Check to see if the remainder beyond the equal sign is true or false:
-                    string += equalIndex + 1;
-                    parse_bool_arg(string, fBoolValue);
-                    return true;
-                }
-            }
-        }
-        return fName.equals(string) || fShortName.equals(string);
-    } else {
-        // Has no dash
-        return false;
-    }
-    return false;
-}
-
-SkFlagInfo* SkFlags::gHead;
-SkString SkFlags::gUsage;
-
-void SkFlags::SetUsage(const char* usage) {
-    gUsage.set(usage);
-}
-
-// Maximum line length for the help message.
-#define LINE_LENGTH 80
-
-static void print_help_for_flag(const SkFlagInfo* flag) {
-    SkDebugf("\t--%s", flag->name().c_str());
-    const SkString& shortName = flag->shortName();
-    if (shortName.size() > 0) {
-        SkDebugf(" or -%s", shortName.c_str());
-    }
-    SkDebugf(":\ttype: %s", flag->typeAsString().c_str());
-    if (flag->defaultValue().size() > 0) {
-        SkDebugf("\tdefault: %s", flag->defaultValue().c_str());
-    }
-    SkDebugf("\n");
-    const SkString& help = flag->help();
-    size_t length = help.size();
-    const char* currLine = help.c_str();
-    const char* stop = currLine + length;
-    while (currLine < stop) {
-        if (strlen(currLine) < LINE_LENGTH) {
-            // Only one line length's worth of text left.
-            SkDebugf("\t\t%s\n", currLine);
-            break;
-        }
-        int lineBreak = SkStrFind(currLine, "\n");
-        if (lineBreak < 0 || lineBreak > LINE_LENGTH) {
-            // No line break within line length. Will need to insert one.
-            // Find a space before the line break.
-            int spaceIndex = LINE_LENGTH - 1;
-            while (spaceIndex > 0 && currLine[spaceIndex] != ' ') {
-                spaceIndex--;
-            }
-            int gap;
-            if (0 == spaceIndex) {
-                // No spaces on the entire line. Go ahead and break mid word.
-                spaceIndex = LINE_LENGTH;
-                gap = 0;
-            } else {
-                // Skip the space on the next line
-                gap = 1;
-            }
-            SkDebugf("\t\t%.*s\n", spaceIndex, currLine);
-            currLine += spaceIndex + gap;
-        } else {
-            // the line break is within the limit. Break there.
-            lineBreak++;
-            SkDebugf("\t\t%.*s", lineBreak, currLine);
-            currLine += lineBreak;
-        }
-    }
-    SkDebugf("\n");
-}
-
-void SkFlags::ParseCommandLine(int argc, char** argv) {
-    // Only allow calling this function once.
-    static bool gOnce;
-    if (gOnce) {
-        SkDebugf("ParseCommandLine should only be called once at the beginning"
-                 " of main!\n");
-        SkASSERT(false);
-        return;
-    }
-    gOnce = true;
-
-    bool helpPrinted = false;
-    // Loop over argv, starting with 1, since the first is just the name of the program.
-    for (int i = 1; i < argc; i++) {
-        if (0 == strcmp("-h", argv[i]) || 0 == strcmp("--h", argv[i])
-                || 0 == strcmp("-help", argv[i]) || 0 == strcmp("--help", argv[i])) {
-            // Print help message.
-            SkTDArray<const char*> helpFlags;
-            for (int j = i + 1; j < argc; j++) {
-                if (SkStrStartsWith(argv[j], '-')) {
-                    break;
-                }
-                helpFlags.append(1, &argv[j]);
-            }
-            if (0 == helpFlags.count()) {
-                // Only print general help message if help for specific flags is not requested.
-                SkDebugf("%s\n%s\n", argv[0], gUsage.c_str());
-            }
-            SkDebugf("Flags:\n");
-            SkFlagInfo* flag = SkFlags::gHead;
-            while (flag != NULL) {
-                // If no flags followed --help, print them all
-                bool printFlag = 0 == helpFlags.count();
-                if (!printFlag) {
-                    for (int k = 0; k < helpFlags.count(); k++) {
-                        if (flag->name().equals(helpFlags[k]) ||
-                            flag->shortName().equals(helpFlags[k])) {
-                            printFlag = true;
-                            helpFlags.remove(k);
-                            break;
-                        }
-                    }
-                }
-                if (printFlag) {
-                    print_help_for_flag(flag);
-                }
-                flag = flag->next();
-            }
-            if (helpFlags.count() > 0) {
-                SkDebugf("Requested help for unrecognized flags:\n");
-                for (int k = 0; k < helpFlags.count(); k++) {
-                    SkDebugf("\t--%s\n", helpFlags[k]);
-                }
-            }
-            helpPrinted = true;
-        }
-        if (!helpPrinted) {
-            bool flagMatched = false;
-            SkFlagInfo* flag = gHead;
-            while (flag != NULL) {
-                if (flag->match(argv[i])) {
-                    flagMatched = true;
-                    switch (flag->getFlagType()) {
-                        case SkFlagInfo::kBool_FlagType:
-                            // Can be handled by match, above, but can also be set by the next
-                            // string.
-                            if (i+1 < argc && !SkStrStartsWith(argv[i+1], '-')) {
-                                i++;
-                                bool value;
-                                if (parse_bool_arg(argv[i], &value)) {
-                                    flag->setBool(value);
-                                }
-                            }
-                            break;
-                        case SkFlagInfo::kString_FlagType:
-                            flag->resetStrings();
-                            // Add all arguments until another flag is reached.
-                            while (i+1 < argc && !SkStrStartsWith(argv[i+1], '-')) {
-                                i++;
-                                flag->append(argv[i]);
-                            }
-                            break;
-                        case SkFlagInfo::kInt_FlagType:
-                            i++;
-                            flag->setInt(atoi(argv[i]));
-                            break;
-                        case SkFlagInfo::kDouble_FlagType:
-                            i++;
-                            flag->setDouble(atof(argv[i]));
-                            break;
-                        default:
-                            SkASSERT(!"Invalid flag type");
-                    }
-                    break;
-                }
-                flag = flag->next();
-            }
-            if (!flagMatched) {
-                SkDebugf("Got unknown flag \"%s\". Exiting.\n", argv[i]);
-                exit(-1);
-            }
-        }
-    }
-    // Since all of the flags have been set, release the memory used by each
-    // flag. FLAGS_x can still be used after this.
-    SkFlagInfo* flag = gHead;
-    gHead = NULL;
-    while (flag != NULL) {
-        SkFlagInfo* next = flag->next();
-        SkDELETE(flag);
-        flag = next;
-    }
-    if (helpPrinted) {
-        exit(0);
-    }
-}