100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
/******************************************************************************
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* Copyright (C) 2009, International Business Machines
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* Corporation and others. All Rights Reserved.
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*******************************************************************************
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*/
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#include "flagparser.h"
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#include "filestrm.h"
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#define LARGE_BUFFER_MAX_SIZE 2048
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static void extractFlag(char* buffer, int32_t bufferSize, char* flag, int32_t flagSize, UErrorCode *status);
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static int32_t getFlagOffset(const char *buffer, int32_t bufferSize);
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/*
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* Opens the given fileName and reads in the information storing the data in flagBuffer.
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*/
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U_CAPI void U_EXPORT2
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parseFlagsFile(const char *fileName, char **flagBuffer, int32_t flagBufferSize, int32_t numOfFlags, UErrorCode *status) {
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char buffer[LARGE_BUFFER_MAX_SIZE];
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int32_t i;
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FileStream *f = T_FileStream_open(fileName, "r");
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if (f == NULL) {
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*status = U_FILE_ACCESS_ERROR;
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return;
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}
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for (i = 0; i < numOfFlags; i++) {
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if (T_FileStream_readLine(f, buffer, LARGE_BUFFER_MAX_SIZE) == NULL) {
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*status = U_FILE_ACCESS_ERROR;
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break;
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}
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extractFlag(buffer, LARGE_BUFFER_MAX_SIZE, flagBuffer[i], flagBufferSize, status);
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if (U_FAILURE(*status)) {
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break;
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}
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}
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T_FileStream_close(f);
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}
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/*
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* Extract the setting after the '=' and store it in flag excluding the newline character.
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*/
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static void extractFlag(char* buffer, int32_t bufferSize, char* flag, int32_t flagSize, UErrorCode *status) {
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int32_t i;
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char *pBuffer;
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int32_t offset;
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UBool bufferWritten = FALSE;
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if (buffer[0] != 0) {
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/* Get the offset (i.e. position after the '=') */
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offset = getFlagOffset(buffer, bufferSize);
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pBuffer = buffer+offset;
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for(i = 0;;i++) {
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if (i >= flagSize) {
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*status = U_BUFFER_OVERFLOW_ERROR;
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return;
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}
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if (pBuffer[i+1] == 0) {
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/* Indicates a new line character. End here. */
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flag[i] = 0;
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break;
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}
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flag[i] = pBuffer[i];
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if (i == 0) {
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bufferWritten = TRUE;
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}
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}
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}
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if (!bufferWritten) {
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flag[0] = 0;
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}
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}
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/*
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* Get the position after the '=' character.
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*/
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static int32_t getFlagOffset(const char *buffer, int32_t bufferSize) {
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int32_t offset = 0;
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for (offset = 0; offset < bufferSize;offset++) {
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if (buffer[offset] == '=') {
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offset++;
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break;
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}
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}
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if (offset == bufferSize || (offset - 1) == bufferSize) {
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offset = 0;
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}
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return offset;
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}
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