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(detect_eol_type): If EOL representation does not

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seem consistent, use no conversion.
This commit is contained in:
Richard M. Stallman 1997-08-05 18:19:33 +00:00
parent fc8915913f
commit bc4bc72a9a
1 changed files with 23 additions and 8 deletions
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31
src/coding.c
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@ -2703,6 +2703,8 @@ detect_coding (coding, src, src_bytes)
is encoded. Return one of CODING_EOL_LF, CODING_EOL_CRLF,
CODING_EOL_CR, and CODING_EOL_UNDECIDED. */
#define MAX_EOL_CHECK_COUNT 3
int
detect_eol_type (src, src_bytes)
unsigned char *src;
@ -2710,21 +2712,34 @@ detect_eol_type (src, src_bytes)
{
unsigned char *src_end = src + src_bytes;
unsigned char c;
int total = 0; /* How many end-of-lines are found so far. */
int eol_type = CODING_EOL_UNDECIDED;
int this_eol_type;
while (src < src_end)
while (src < src_end && total < MAX_EOL_CHECK_COUNT)
{
c = *src++;
if (c == '\n')
return CODING_EOL_LF;
else if (c == '\r')
if (c == '\n' || c == '\r')
{
if (src < src_end && *src == '\n')
return CODING_EOL_CRLF;
total++;
if (c == '\n')
this_eol_type = CODING_EOL_LF;
else if (src >= src_end || *src != '\n')
this_eol_type = CODING_EOL_CR;
else
return CODING_EOL_CR;
this_eol_type = CODING_EOL_CRLF, src++;
if (eol_type == CODING_EOL_UNDECIDED)
/* This is the first end-of-line. */
eol_type = this_eol_type;
else if (eol_type != this_eol_type)
/* The found type is different from what found before.
We had better not decode end-of-line. */
return CODING_EOL_LF;
}
}
return CODING_EOL_UNDECIDED;
return (total ? eol_type : CODING_EOL_UNDECIDED);
}
/* Detect how end-of-line of a text of length SRC_BYTES pointed by SRC