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Only add newlines to file if necessary

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This commit is contained in:
dbrotz
2018-12-02 20:43:20 -08:00
parent bad66e54fa
commit a060f135b8
1 changed files with 25 additions and 4 deletions
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29
src/asm/lexer.c
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@@ -155,10 +155,7 @@ YY_BUFFER_STATE yy_create_buffer(FILE *f)
size = fread(pBuffer->pBuffer, sizeof(uint8_t), size, f);
pBuffer->pBuffer[size] = '\n';
pBuffer->pBuffer[size + 1] = '\n'; /* in case the file ends with \ */
pBuffer->pBuffer[size + 2] = 0;
pBuffer->nBufferSize = size + 2;
pBuffer->pBuffer[size] = 0;
/* Convert all line endings to LF and spaces */
@@ -219,6 +216,30 @@ YY_BUFFER_STATE yy_create_buffer(FILE *f)
}
}
pBuffer->nBufferSize = size;
/* Add newline if file doesn't end with one */
if (size == 0 || pBuffer->pBuffer[size - 1] != '\n') {
pBuffer->pBuffer[pBuffer->nBufferSize] = '\n';
pBuffer->nBufferSize++;
}
/* Add newline if \ will eat the last newline */
if (pBuffer->nBufferSize >= 2) {
size_t pos = pBuffer->nBufferSize - 2;
/* Skip spaces */
while (pos > 0 && pBuffer->pBuffer[pos] == ' ')
pos--;
if (pBuffer->pBuffer[pos] == '\\') {
pBuffer->pBuffer[pBuffer->nBufferSize] = '\n';
pBuffer->nBufferSize++;
}
}
pBuffer->pBuffer[pBuffer->nBufferSize] = 0;
pBuffer->oAtLineStart = 1;
return pBuffer;
}