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#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <malloc.h>
#include <ctype.h>
#include <time.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include "common.h"
#include "log.h"
#include "procfile.h"
#define PF_PREFIX "PROCFILE"
#define PFWORDS_INCREASE_STEP 200
#define PFLINES_INCREASE_STEP 10
#define PROCFILE_INCREMENT_BUFFER 512
int procfile_adaptive_initial_allocation = 0;
// if adaptive allocation is set, these store the
// max values we have seen so far
uint32_t procfile_max_lines = PFLINES_INCREASE_STEP;
uint32_t procfile_max_words = PFWORDS_INCREASE_STEP;
size_t procfile_max_allocation = PROCFILE_INCREMENT_BUFFER;
// ----------------------------------------------------------------------------
// An array of words
pfwords *pfwords_add(pfwords *fw, char *str) {
// debug(D_PROCFILE, PF_PREFIX ": adding word No %d: '%s'", fw->len, str);
if(unlikely(fw->len == fw->size)) {
// debug(D_PROCFILE, PF_PREFIX ": expanding words");
pfwords *new = realloc(fw, sizeof(pfwords) + (fw->size + PFWORDS_INCREASE_STEP) * sizeof(char *));
if(unlikely(!new)) {
error(PF_PREFIX ": failed to expand words");
free(fw);
return NULL;
}
fw = new;
fw->size += PFWORDS_INCREASE_STEP;
}
fw->words[fw->len++] = str;
return fw;
}
pfwords *pfwords_new(void) {
// debug(D_PROCFILE, PF_PREFIX ": initializing words");
uint32_t size = (procfile_adaptive_initial_allocation) ? procfile_max_words : PFWORDS_INCREASE_STEP;
pfwords *new = malloc(sizeof(pfwords) + size * sizeof(char *));
if(unlikely(!new)) return NULL;
new->len = 0;
new->size = size;
return new;
}
void pfwords_reset(pfwords *fw) {
// debug(D_PROCFILE, PF_PREFIX ": reseting words");
fw->len = 0;
}
void pfwords_free(pfwords *fw) {
// debug(D_PROCFILE, PF_PREFIX ": freeing words");
free(fw);
}
// ----------------------------------------------------------------------------
// An array of lines
pflines *pflines_add(pflines *fl, uint32_t first_word) {
// debug(D_PROCFILE, PF_PREFIX ": adding line %d at word %d", fl->len, first_word);
if(unlikely(fl->len == fl->size)) {
// debug(D_PROCFILE, PF_PREFIX ": expanding lines");
pflines *new = realloc(fl, sizeof(pflines) + (fl->size + PFLINES_INCREASE_STEP) * sizeof(ffline));
if(unlikely(!new)) {
error(PF_PREFIX ": failed to expand lines");
free(fl);
return NULL;
}
fl = new;
fl->size += PFLINES_INCREASE_STEP;
}
fl->lines[fl->len].words = 0;
fl->lines[fl->len++].first = first_word;
return fl;
}
pflines *pflines_new(void) {
// debug(D_PROCFILE, PF_PREFIX ": initializing lines");
uint32_t size = (unlikely(procfile_adaptive_initial_allocation)) ? procfile_max_words : PFLINES_INCREASE_STEP;
pflines *new = malloc(sizeof(pflines) + size * sizeof(ffline));
if(unlikely(!new)) return NULL;
new->len = 0;
new->size = size;
return new;
}
void pflines_reset(pflines *fl) {
// debug(D_PROCFILE, PF_PREFIX ": reseting lines");
fl->len = 0;
}
void pflines_free(pflines *fl) {
// debug(D_PROCFILE, PF_PREFIX ": freeing lines");
free(fl);
}
// ----------------------------------------------------------------------------
// The procfile
#define PF_CHAR_IS_SEPARATOR ' '
#define PF_CHAR_IS_NEWLINE 'N'
#define PF_CHAR_IS_WORD 'W'
void procfile_close(procfile *ff) {
debug(D_PROCFILE, PF_PREFIX ": Closing file '%s'", ff->filename);
if(likely(ff->lines)) pflines_free(ff->lines);
if(likely(ff->words)) pfwords_free(ff->words);
if(likely(ff->fd != -1)) close(ff->fd);
free(ff);
}
procfile *procfile_parser(procfile *ff) {
debug(D_PROCFILE, PF_PREFIX ": Parsing file '%s'", ff->filename);
char *s = ff->data, *e = ff->data, *t = ff->data;
uint32_t l = 0, w = 0;
e += ff->len;
ff->lines = pflines_add(ff->lines, w);
if(unlikely(!ff->lines)) goto cleanup;
while(likely(s < e)) {
switch(ff->separators[(int)(*s)]) {
case PF_CHAR_IS_SEPARATOR:
if(likely(s == t)) {
// skip all leading white spaces
t = ++s;
continue;
}
// end of word
*s = '\0';
ff->words = pfwords_add(ff->words, t);
if(unlikely(!ff->words)) goto cleanup;
ff->lines->lines[l].words++;
w++;
t = ++s;
continue;
case PF_CHAR_IS_NEWLINE:
// end of line
*s = '\0';
ff->words = pfwords_add(ff->words, t);
if(unlikely(!ff->words)) goto cleanup;
ff->lines->lines[l].words++;
w++;
// debug(D_PROCFILE, PF_PREFIX ": ended line %d with %d words", l, ff->lines->lines[l].words);
ff->lines = pflines_add(ff->lines, w);
if(unlikely(!ff->lines)) goto cleanup;
l++;
t = ++s;
continue;
default:
s++;
continue;
}
}
if(likely(s != t)) {
// the last word
if(likely(ff->len < ff->size)) *s = '\0';
else {
// we are going to loose the last byte
ff->data[ff->size - 1] = '\0';
}
ff->words = pfwords_add(ff->words, t);
if(unlikely(!ff->words)) goto cleanup;
ff->lines->lines[l].words++;
w++;
}
return ff;
cleanup:
error(PF_PREFIX ": Failed to parse file '%s'", ff->filename);
procfile_close(ff);
return NULL;
}
procfile *procfile_readall(procfile *ff) {
debug(D_PROCFILE, PF_PREFIX ": Reading file '%s'.", ff->filename);
ssize_t s, r = 1, x;
ff->len = 0;
while(likely(r > 0)) {
s = ff->len;
x = ff->size - s;
if(!x) {
debug(D_PROCFILE, PF_PREFIX ": Expanding data buffer for file '%s'.", ff->filename);
procfile *new = realloc(ff, sizeof(procfile) + ff->size + PROCFILE_INCREMENT_BUFFER);
if(unlikely(!new)) {
error(PF_PREFIX ": Cannot allocate memory for file '%s'", ff->filename);
procfile_close(ff);
return NULL;
}
ff = new;
ff->size += PROCFILE_INCREMENT_BUFFER;
}
debug(D_PROCFILE, &quo
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