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Improve palmdoc C decompression routine to accept arbitrary sized input data blocks

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Kovid Goyal 2011-04-17 18:35:54 -06:00
parent 826bf29f5d
commit a80b5a9f1a
1 changed files with 2 additions and 1 deletions
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3
src/calibre/ebooks/compression/palmdoc.c
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@ -17,6 +17,7 @@
#define BUFFER 6000 #define BUFFER 6000
#define MIN(x, y) ( ((x) < (y)) ? (x) : (y) ) #define MIN(x, y) ( ((x) < (y)) ? (x) : (y) )
#define MAX(x, y) ( ((x) > (y)) ? (x) : (y) )
typedef unsigned short int Byte; typedef unsigned short int Byte;
typedef struct { typedef struct {
@ -53,7 +54,7 @@ cpalmdoc_decompress(PyObject *self, PyObject *args) {
// Map chars to bytes // Map chars to bytes
for (j = 0; j < input_len; j++) for (j = 0; j < input_len; j++)
input[j] = (_input[j] < 0) ? _input[j]+256 : _input[j]; input[j] = (_input[j] < 0) ? _input[j]+256 : _input[j];
output = (char *)PyMem_Malloc(sizeof(char)*BUFFER); output = (char *)PyMem_Malloc(sizeof(char)*(MAX(BUFFER, 5*input_len)));
if (output == NULL) return PyErr_NoMemory(); if (output == NULL) return PyErr_NoMemory();
while (i < input_len) { while (i < input_len) {