Hugh McMaster : regedit: Rewrite processRegLinesA into an ANSI version of processRegLinesW.
Module: wine Branch: master Commit: 3763c7a61055045bacd98dd592f03346ba365264 URL: http://source.winehq.org/git/wine.git/?a=commit;h=3763c7a61055045bacd98dd592... Author: Hugh McMaster <hugh.mcmaster(a)outlook.com> Date: Thu Jul 21 05:48:30 2016 +0000 regedit: Rewrite processRegLinesA into an ANSI version of processRegLinesW. Signed-off-by: Hugh McMaster <hugh.mcmaster(a)outlook.com> Signed-off-by: Alexandre Julliard <julliard(a)winehq.org> --- programs/regedit/regproc.c | 198 ++++++++++++++++++++------------------------- 1 file changed, 87 insertions(+), 111 deletions(-) diff --git a/programs/regedit/regproc.c b/programs/regedit/regproc.c index e3acecd..be6f7a5 100644 --- a/programs/regedit/regproc.c +++ b/programs/regedit/regproc.c @@ -596,144 +596,120 @@ static void processRegEntry(WCHAR* stdInput, BOOL isUnicode) */ static void processRegLinesA(FILE *in, char* first_chars) { - LPSTR line = NULL; /* line read from input stream */ - ULONG lineSize = REG_VAL_BUF_SIZE; + char *buf = NULL; /* the line read from the input stream */ + unsigned long line_size = REG_VAL_BUF_SIZE; + size_t chars_in_buf = -1; + char *s; /* A pointer to buf for fread */ + char *line; /* The start of the current line */ + WCHAR *lineW; + + buf = HeapAlloc(GetProcessHeap(), 0, line_size); + CHECK_ENOUGH_MEMORY(buf); + s = buf; + line = buf; - line = HeapAlloc(GetProcessHeap(), 0, lineSize); - CHECK_ENOUGH_MEMORY(line); memcpy(line, first_chars, 2); + if (first_chars) + s += 2; + while (!feof(in)) { - LPSTR s; /* The pointer into line for where the current fgets should read */ - WCHAR* lineW; - s = line; + size_t size_remaining; + int size_to_get; + char *s_eol = NULL; /* various local uses */ - if(first_chars) + /* Do we need to expand the buffer? */ + assert(s >= buf && s <= buf + line_size); + size_remaining = line_size - (s - buf); + if (size_remaining < 3) /* we need at least 3 bytes of room for \r\n\0 */ { - s += 2; - first_chars = NULL; + char *new_buffer; + size_t new_size = line_size + REG_VAL_BUF_SIZE; + if (new_size > line_size) /* no arithmetic overflow */ + new_buffer = HeapReAlloc(GetProcessHeap(), 0, buf, new_size); + else + new_buffer = NULL; + CHECK_ENOUGH_MEMORY(new_buffer); + buf = new_buffer; + line = buf; + s = buf + line_size - size_remaining; + line_size = new_size; + size_remaining = line_size - (s - buf); } - for (;;) { - size_t size_remaining; - int size_to_get, i; - char *s_eol; /* various local uses */ + /* Get as much as possible into the buffer, terminating on EOF, + * error or once we have read the maximum amount. Abort on error. + */ + size_to_get = (size_remaining > INT_MAX ? INT_MAX : size_remaining); - /* Do we need to expand the buffer ? */ - assert (s >= line && s <= line + lineSize); - size_remaining = lineSize - (s-line); - if (size_remaining < 3) /* need at least 3 bytes of room for \r\n\0 */ - { - char *new_buffer; - size_t new_size = lineSize + REG_VAL_BUF_SIZE; - if (new_size > lineSize) /* no arithmetic overflow */ - new_buffer = HeapReAlloc (GetProcessHeap(), 0, line, new_size); - else - new_buffer = NULL; - CHECK_ENOUGH_MEMORY(new_buffer); - line = new_buffer; - s = line + lineSize - size_remaining; - lineSize = new_size; - size_remaining = lineSize - (s-line); - } + chars_in_buf = fread(s, 1, size_to_get - 1, in); + s[chars_in_buf] = 0; - /* Get as much as possible into the buffer, terminated either by - * eof, error, eol or getting the maximum amount. Abort on error. - */ - size_to_get = (size_remaining > INT_MAX ? INT_MAX : size_remaining); - - /* get a single line. note that `i' must be one past the last - * meaningful character in `s' when this loop exits */ - for(i = 0; i < size_to_get-1; ++i){ - int xchar; - - xchar = fgetc(in); - s[i] = xchar; - if(xchar == EOF){ - if(ferror(in)){ - perror("While reading input"); - exit(IO_ERROR); - }else - assert(feof(in)); - break; - } - if(s[i] == '\r'){ - /* read the next character iff it's \n */ - if(i+2 >= size_to_get){ - /* buffer too short, so put back the EOL char to - * read next cycle */ - ungetc('\r', in); - break; - } - s[i+1] = fgetc(in); - if(s[i+1] != '\n'){ - ungetc(s[i+1], in); - i = i+1; - }else - i = i+2; - break; - } - if(s[i] == '\n'){ - i = i+1; - break; - } + if (chars_in_buf == 0) { + if (ferror(in)) { + perror("While reading input"); + exit(IO_ERROR); + } else { + assert(feof(in)); + *s = '\0'; } - s[i] = '\0'; + } - /* If we didn't read the eol nor the eof go around for the rest */ - s_eol = strpbrk (s, "\r\n"); - if (!feof (in) && !s_eol) { - s = strchr (s, '\0'); - continue; + /* If we didn't read the end-of-line sequence or EOF, go around again */ + while (1) + { + s_eol = strpbrk(line, "\r\n"); + if (!s_eol) { + /* Move the stub of the line to the start of the buffer so + * we get the maximum space to read into, and so we don't + * have to recalculate 'line' if the buffer expands */ + MoveMemory(buf, line, strlen(line) + 1); + line = buf; + s = strchr(line, '\0'); + break; } - /* If it is a comment line then discard it and go around again */ + /* If we find a comment line, discard it and go around again */ if (line [0] == '#' || line [0] == ';') { - s = line; + if (*s_eol == '\r' && *(s_eol + 1) == '\n') + line = s_eol + 2; + else + line = s_eol + 1; continue; } - /* Remove any line feed. Leave s_eol on the first \0 */ - if (s_eol) { - if (*s_eol == '\r' && *(s_eol+1) == '\n') - *(s_eol+1) = '\0'; - *s_eol = '\0'; - } else - s_eol = strchr (s, '\0'); + /* If there is a concatenating '\\', go around again */ + if (*(s_eol - 1) == '\\') { + char *next_line = s_eol + 1; - /* If there is a concatenating \\ then go around again */ - if (s_eol > line && *(s_eol-1) == '\\') { - int c; - s = s_eol-1; - - do - { - c = fgetc(in); - } while(c == ' ' || c == '\t'); - - if(c == EOF) - { - fprintf(stderr, "regedit: ERROR - invalid continuation.\n"); - } - else - { - *s = c; - s++; - } + if (*s_eol == '\r' && *(s_eol + 1) == '\n') + next_line++; + + while (*(next_line + 1) == ' ' || *(next_line + 1) == '\t') + next_line++; + + MoveMemory(s_eol - 1, next_line, chars_in_buf - (next_line - s) + 1); + chars_in_buf -= next_line - s_eol + 1; + s_eol = 0; continue; } - lineW = GetWideString(line); + /* Remove any line feed. Leave s_eol on the last \0 */ + if (*s_eol == '\r' && *(s_eol + 1) == '\n') + *s_eol++ = '\0'; + *s_eol = '\0'; - break; /* That is the full virtual line */ + lineW = GetWideString(line); + processRegEntry(lineW, FALSE); + HeapFree(GetProcessHeap(), 0, lineW); + line = s_eol + 1; + s_eol = 0; + continue; /* That is the full virtual line */ } - - processRegEntry(lineW, FALSE); - HeapFree(GetProcessHeap(), 0, lineW); } processRegEntry(NULL, FALSE); - HeapFree(GetProcessHeap(), 0, line); + HeapFree(GetProcessHeap(), 0, buf); } static void processRegLinesW(FILE *in)
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Alexandre Julliard