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6 Commits

  1. 296
      include/easycsv.h
  2. 7
      src/Makefile.am
  3. 506
      src/_easycsv.c
  4. 178
      src/_easycsv.h
  5. 721
      src/easycsv.c
  6. 196
      src/easycsv.h
  7. 39
      src/easycsv_error.h
  8. 0
      src/internal/easycsv_error.h
  9. 27
      tests/check_easycsv.c

296
include/easycsv.h

@ -0,0 +1,296 @@
#ifndef EASYCSV_H
#define EASYCSV_H
#include "../src/_easycsv.h"
/** Public easycsv members */
typedef struct easycsv {
EASYCSV_MODE mode;
_easycsv *_priv;
} easycsv;
/*** Constructors ***/
/**
* Initialise easycsv
* @param[in] relative path to CSV file
* @param[in] easycsv mode
* @return pointer to easycsv structure
*/
easycsv*
easycsv_init(const char*,
const EASYCSV_MODE);
/**
* Initialise easycsv structure with a given error message mode
* @param[in] relative path to CSV file
* @param[in] easycsv mode
* @param[in] easycsv error message mode
* @return pointer to easycsv structure
*/
easycsv*
easycsv_init_errormsg(const char*,
const EASYCSV_MODE,
const EASYCSV_ERRORMSG);
/**
* Destroy easycsv structure
* @param[in] Pointer to easycsv stucture
*/
void
easycsv_free(easycsv*);
/*** Access, find ***/
/**
* Find value and returns row and column
* @param[in] constant pointer to easycsv structure
* @param[in] value to find
* @param[out] row number
* @param[out] column number
* @return easycsv error code
*/
int
easycsv_findvalue(const easycsv*,
const char*,
unsigned int*,
unsigned int*);
/**
* Find number of instances of value
* @param[in] constant pointer to easycsv structure
* @param[in] value to find
* @return number of instances
*/
int
easycsv_findnumvalue(const easycsv*,
const char*);
/*** Access, read ***/
/**
* Read string in a specific cell
* @param[in] constant pointer to easycsv structure
* @param[in] row number
* @param[in] column number
* @return string value of cell, NULL if empty cell
*/
char*
easycsv_readvalue(const easycsv*,
unsigned int,
unsigned int);
/**
* Read string in a specific cell with named column in row 1
* @param[in] constant pointer to easycsv structure
* @param[in] row value
* @param[in] column number
* @return string value of cell, NULL if empty cell
*/
char*
easycsv_readcolumnvalue(const easycsv*,
const char*,
unsigned int);
/*** Access, print ***/
/**
* Return number of rows
* @param[in] constant pointer to easycsv structure
* @return number of rows
*/
int
easycsv_printrows(const easycsv*);
/**
* Return number of columns
* @param[in] constant pointer to easycsv structure
* @return number of columns
*/
int
easycsv_printcolumns(const easycsv*);
/*** Modifications, sort ***/
/**
* Sort row
* @param[in] pointer to easycsv structure
* @param[in] row value
* @param[in] easycsv sort mode
* @return easycsv error code
*/
int
easycsv_sortrow(easycsv*,
const char*,
EASYCSV_SORT);
/**
* Sort column
* @param[in] pointer to easycsv structure
* @param[in] column value
* @param[in] easycsv sort mode
* @return easycsv error code
*/
int
easycsv_sortcolumn(easycsv*,
const char*,
EASYCSV_SORT);
/*** Modifications, insert ***/
/**
* Insert row into CSV file
* @param[in] pointer to easycsv structure
* @param[in] cell value
* @param[in] row number
* @return easycsv error code
*/
int
easycsv_insertrow(easycsv*,
const char*,
int);
/**
* Insert string in a specific cell
* @param[in] pointer to easycsv structure
* @param[in] cell value
* @param[in] row number
* @param[in] column number
* @return easycsv error code
*/
int
easycsv_insertvalue(easycsv*,
const char*,
unsigned int,
unsigned int);
/**
* Insert string in a specific cell with specific mode
* @param[in] pointer to easycsv structure
* @param[in] cell value
* @param[in] row number
* @param[in] column number
* @param[in] easycsv value mode
* @return easycsv error code
*/
int
easycsv_insertvaluemode(easycsv*,
const char*,
unsigned int,
unsigned int,
EASYCSV_VALMODE);
/**
* Insert string in a specific cell with named column in a given row
* @param[in] pointer to easycsv structure
* @param[in] cell value
* @param[in] row number
* @param[in] column value
* @return easycsv error code
*/
int
easycsv_insertcolumnvalue(easycsv*,
const char*,
unsigned int,
const char*);
/**
* Insert string in a specific cell with named column in a given row with specific mode
* @param[in] pointer to easycsv structure
* @param[in] cell value
* @param[in] row number
* @param[in] column value
* @param[in] easycsv value mode
* @return easycsv error code
*/
int
easycsv_insertcolumnvaluemode(easycsv*,
const char*,
unsigned int,
const char*,
EASYCSV_VALMODE);
/*** Modifications, push ***/
/**
* Create new column on the right-hand side of an existing one
* @param[in] pointer to easycsv structure
* @param[in] column value
* @return easycsv error code
*/
int
easycsv_pushcolumn(easycsv*,
const char*);
/**
* Insert string in a vacant cell under a named column
* @param[in] pointer to easycsv structure
* @param[in] column value
* @param[in] cell value
* @return easycsv error code
*/
int
easycsv_pushcolumnvalue(easycsv*,
const char*,
const char*);
/*** Modifications, delete ***/
/**
* Delete cell value
* @param[in] pointer to easycsv structure
* @param[in] row number
* @param[in] column number
* @return easycsv error code
*/
int
easycsv_deletevalue(easycsv*,
unsigned int,
unsigned int);
/**
* Delete numbered column
* @param[in] pointer to easycsv structure
* @param[in] column number
* @return easycsv error code
*/
int
easycsv_deletecolumnint(easycsv*,
unsigned int);
/** Delete named column
* @param[in] pointer to easycsv structure
* @param[in] column value
* @return easycsv error code
*/
int
easycsv_deletecolumnstr(easycsv*,
const char*);
/* Delete numered row */
/* Delete named row */
/*** Modifications, append ***/
/**
* Append two CSV files
* @param[in] destination CSV file
* @param[in] source CSV file
* @return easycsv error code
*/
int
easycsv_appendcsv(easycsv*,
easycsv*);
/*** Modifications, miscellenaeous ***/
/**
* Compress a CSV file
* @param[in] pointer to easycsv structure
* @return easycsv error code
*/
int
easycsv_compress(easycsv*);
#endif /* EASYCSV_H */

7
src/Makefile.am

@ -1,3 +1,6 @@
lib_LTLIBRARIES = libeasycsv.la
libeasycsv_la_SOURCES = easycsv.c
include_HEADERS = easycsv.h
libeasycsv_la_SOURCES = \
_easycsv.c \
_easycsv.h \
easycsv.c
include_HEADERS = ../include/easycsv.h

506
src/_easycsv.c

@ -0,0 +1,506 @@
#include "_easycsv.h"
/* (Constructor) Initialise _easycsv */
_easycsv*
_easycsv_priv_init(const char *fp,
const EASYCSV_MODE mode,
const EASYCSV_ERRORMSG error)
{
_easycsv *_priv = malloc(sizeof(_easycsv));
_priv->file = NULL;
_priv->temp = NULL;
_priv->fp = NULL;
_priv->tmpfp = NULL;
_priv->rows = 0;
_priv->cols = 0;
#ifdef EASYCSV_DEBUG
_priv->start = 0;
#endif
_priv->error = error;
/* Open file according to mode */
switch (mode) {
case EASYCSV_R: {
_priv->file = fopen(fp, "r");
break;
}
case EASYCSV_W: {
_priv->file = fopen(fp, "w");
break;
}
default: {
_easycsv_printerror(_priv, EASYCSV_UNKNOWNIOMODE);
_easycsv_priv_free(_priv);
return NULL;
}
}
if (_priv->file == NULL)
{
_easycsv_printerror(_priv, EASYCSV_OPENFAIL);
_easycsv_priv_free(_priv);
return NULL;
}
size_t stfp = strlen(fp);
/* Allocate memory for char* */
_priv->fp = malloc(stfp + 1); // + 1 for null
strcpy(_priv->fp, fp);
/* Calculate rows and cols if file exists */
if (access(_priv->fp, F_OK) == 0) {
_priv->rows = _easycsv_rows(_priv, mode);
_priv->cols = _easycsv_columns(_priv, mode);
}
if (mode == EASYCSV_W) {
/* csv->tmpfp = malloc(16 + stfp + 1); */
/* strncpy(csv->tmpfp, prefix, 16); */
/* strncat(csv->tmpfp, fp, stfp); */
do {
/* Write to temporary file */
unsigned int i = 1;
char buffer[21] = "/tmp/easycsv-"; // 13 char, 3 for digits, 4 for .csv, 1 for NULL
if (i < 100)
strncat(buffer, "0", 1);
if (i < 10)
strncat(buffer, "0", 1);
sprintf(buffer + strlen(buffer), "%i", i);
strcat(buffer, ".csv");
if (access(buffer, F_OK) < 0) {
i++;
}
else {
_priv->tmpfp = malloc(21);
strncpy(_priv->tmpfp, buffer, 21);
break;
}
} while (1);
_priv->temp = fopen(_priv->tmpfp, "w");
if (_priv->temp == NULL) {
_easycsv_printerror(_priv, EASYCSV_OPENFAIL);
_easycsv_priv_free(_priv);
return NULL;
}
/*
#ifdef EASYCSV_DEBUG
printf("[%i] easycsv_debug: temp file %s opened\n", clock() - csv->start, csv->tmpfp);
#endif*/
/*
if (freopen(csv->fp, csv->mode, csv->file) == NULL) {
fprintf(stderr, "easycsv: failed to set temporary file %s to %s mode\n", csv->tmpfp, csv->mode);
return NULL;
}
if (freopen(csv->tmpfp, csv->mode, csv->temp) == NULL) {
fprintf(stderr, "easycsv: failed to set temporary file %s to %s mode\n", csv->tmpfp, csv->mode);
return NULL;
}
*/
}
return _priv;
}
/* (Destructor) Free _easycsv memory */
void
_easycsv_priv_free(_easycsv *_priv)
{
/* ARGS CHECK */
if (_priv == NULL)
return;
/* ARGS CHECK */
if (_priv->file != NULL)
fclose(_priv->file);
if (_priv->temp != NULL)
fclose(_priv->temp);
if (_priv->fp != NULL)
free(_priv->fp);
if (_priv->tmpfp != NULL)
free(_priv->tmpfp);
free(_priv);
}
int
_easycsv_update(_easycsv *csv)
{
/* ARGS CHECK */
if (csv == NULL) {
_easycsv_printerror(csv, EASYCSV_NULLCSV);
return -1;
}
/* ARGS CHECK */
/* Set temp file to read binary */
if (freopen(csv->tmpfp, "rb", csv->temp) == NULL) {
_easycsv_printerror(csv, EASYCSV_REOPENFAIL);
easycsv_free(csv);
return -1;
}
/* Set file to write binary */
if (freopen(csv->fp, "wb", csv->file) == NULL) {
_easycsv_printerror(csv, EASYCSV_REOPENFAIL);
easycsv_free(csv);
return -1;
}
/* Copy entire file */
char buf[BUFSIZ];
size_t size;
while (size = fread(buf, 1, BUFSIZ, csv->temp)) {
fwrite(buf, 1, size, csv->file);
}
/* Set temp file back to write */
if (freopen(csv->tmpfp, "w", csv->temp) == NULL) {
_easycsv_printerror(csv, EASYCSV_REOPENFAIL);
easycsv_free(csv);
return -1;
}
/* Set file back to read */
if (freopen(csv->fp, "r", csv->file) == NULL) {
_easycsv_printerror(csv, EASYCSV_REOPENFAIL);
easycsv_free(csv);
return -1;
}
return 0;
}
int
_easycsv_rows(_easycsv *_priv,
const EASYCSV_MODE mode)
{
// no need to check _priv for NULL
if (_easycsv_rewind(_priv, mode) < 0)
return -1;
int rows = 1;
char c;
/* Go through each character in the file and count the number of \n
in it */
while ((c = fgetc(_priv->file)) != EOF) {
if (c == '\n') rows++;
}
return rows;
}
int
_easycsv_columns(_easycsv *_priv,
const EASYCSV_MODE mode)
{
// no need to check _priv for NULL
/* Prepare it for reading */
if (_easycsv_rewind(_priv, mode) < 0) return -1;
/*
1. check if empty file
2. check if only one column -> 0 commas
3. if >1 column, n commas = n+1 columns
*/
int col = 1;
char c;
while ((c = fgetc(_priv->file)) != '\n') {
if (c == ',') col++;
}
return col;
}
char*
_easycsv_getrow(const _easycsv *csv,
const unsigned int row)
{
/* ARGS CHECK */
if (csv == NULL) {
_easycsv_printerror(csv, EASYCSV_NULLCSV);
return NULL;
}
if (row > csv->rows) {
_easycsv_printerror(csv, EASYCSV_OVERMAXROW);
return NULL;
}
if (row == 0) {
_easycsv_printerror(csv, EASYCSV_ZEROROW);
return NULL;
}
/* END ARGS CHECK */
/* Allocate memory */
char *str = malloc(BUFSIZ);
/* Set file pointer to start */
rewind(csv->file);
for (int i = 1; i < row; i++)
{
/* skip until row is reached */
fscanf(csv->file, "%*[^\n]\n", NULL);
}
/* Grab the row and store it in str */
fscanf(csv->file, "%s\n", str);
// printf("row: %s\n", str);
return str;
}
int
_easycsv_rewind(_easycsv *_priv,
const EASYCSV_MODE mode)
{
/* Check if empty file */
if (fscanf(_priv->file, "\n") == EOF) {
_easycsv_printerror(_priv, EASYCSV_EMPTYCSV);
return -1;
}
/* Check if file is readable */
if (mode != EASYCSV_R) {
_easycsv_printerror(_priv, EASYCSV_UNREADABLE);
return -1;
}
/* Set file pointer to the start */
rewind(_priv->file);
return 0;
}
int
_easycsv_getcolumn(const _easycsv *csv,
const char *col)
{
/* ARGS CHECK */
if (_easycsv_checkcsvandstring_one(csv, col) < 0)
return -1;
/* ARGS CHECK */
/* Grab str of row 1 */
char *firstrow = _easycsv_getrow(csv, 1);
if (firstrow == NULL) {
_easycsv_printerror(csv, EASYCSV_ROWNOTEXIST);
return -1;
}
unsigned int commas = 0;
// printf("FIRST COLUMN: %s\n", firstrow);
/* Find first occurance of col in firstrow */
char *str = strstr(firstrow, col);
if (str == NULL) {
_easycsv_printerror(csv, EASYCSV_COLNOTEXIST);
return -1;
}
/* Count numbers of commas following str */
char *c = strpbrk(str, ",");
while (c != NULL) {
commas++;
c = strpbrk(c + 1, ",");
}
/* no need to free c as it is already NULL at this point */
// free((char*) str); apparently invalid pointer
// printf("ROW: %i\nCOL: %i\n", row, csv->cols - commas);
/*
#ifdef EASYCSV_DEBUG
printf("[%i] rcv_commas: %i\n", clock() - csv->start, commas);
#endif
*/
free(firstrow);
return csv->cols - commas;
}
/*
int _easycsv_checkifvalue(struct easycsv *csv, const int col, const int row)
{
const char *rowstr = _easycsv_getrow(csv, row);
return 0;
}
*/
char*
_easycsv_getvalueinrow(const _easycsv *_priv,
const char *row,
const unsigned int col)
{
size_t st;
char *pch = NULL;
/* If not first column */
if (col != 1) {
/* Get first occurance of comma in str,
the first value is ommited but not the comma */
char *pch = strpbrk(row, ",");
/* Repeat until desired col is found */
for (int i = 2; i < col; i++) {
pch = strpbrk(pch + 1, ",");
}
}
/* Get span from start of string to first occurence
of comma */
st = strcspn(pch + 1, ",");
/* If 0, no string exists! */
if (st == 0) {
_easycsv_printerror(_priv, EASYCSV_EMPTYVALUE);
return NULL;
}
char *val = malloc(st + 1);
strncpy(val, pch + 1, st);
strncat(val, "\0", 1);
return val;
}
char*
_easycsv_setcharptovalue(const _easycsv *_priv,
const char *rowstr,
const unsigned int col)
{
char *pch = rowstr;
for (unsigned int i = 1; i < col; i++) {
pch = strchr(rowstr, ',');
if (pch == NULL) {
_easycsv_printerror(_priv, EASYCSV_NULLPTR);
return NULL;
}
pch++;
}
return pch;
}
void
_easycsv_printerror(const _easycsv *_priv,
const EASYCSV_ERROR error)
{
switch (_priv->error) {
case EASYCSV_ERROROFF: return;
case EASYCSV_ERRORSTDOUT: _easycsv_geterror(_priv, error, stdout); break;
case EASYCSV_ERRORSTDERR:
default: _easycsv_geterror(_priv, error, stderr); return;
}
}
void
_easycsv_geterror(const _easycsv *_priv,
const EASYCSV_ERROR error,
FILE *fs)
{
#ifdef EASYCSV_DEBUG
fprintf(stderr, "[%i] ", clock() - _priv->start);
#endif
fputs("easycsv: ", fs);
switch (error) {
/* Generic errors */
case EASYCSV_NOERROR: fputs("no error", fs); break;
case EASYCSV_NULLCSV: fputs("easycsv pointer is NULL", fs); break;
case EASYCSV_NULLPTR: fputs("pointer is NULL", fs); break;
case EASYCSV_EMPTYSTRING: fputs("string is empty", fs); break;
case EASYCSV_EMPTYVALUE: fputs("value in CSV file is empty", fs); break;
case EASYCSV_OVERMAXROW: fprintf(fs, "int exceeds row limit %i", _priv->rows); break;
case EASYCSV_OVERMAXCOL: fprintf(fs, "int exceeds column limit %i", _priv->cols); break;
case EASYCSV_ZEROROW: fputs("parameterised row number is zero", fs); break;
case EASYCSV_ZEROCOL: fputs("parameterised column number is zero", fs); break;
/* File input/output errors */
case EASYCSV_UNKNOWNIOMODE: fputs("unknown file IO mode", fs); break;
case EASYCSV_OPENFAIL: fputs("failed to open file", fs); break;
case EASYCSV_REOPENFAIL: fputs("failed to reopen file", fs); break;
case EASYCSV_EMPTYCSV: fputs("CSV file is empty", fs); break;
case EASYCSV_UNWRITABLE: fputs("CSV file is not in a writable mode", fs); break;
case EASYCSV_UNREADABLE: fputs("CSV file is not in a readable mode", fs); break;
case EASYCSV_UPDATEFAIL: fputs("CSV file has failed to update", fs); break;
case EASYCSV_UPDATETEMPFAIL: fputs("failed to update temp CSV file", fs); break;
case EASYCSV_FILEPTRFAIL: fputs("failed to move FILE pointer", fs); break;
/* Non-existant elements */
case EASYCSV_ROWNOTEXIST: fputs("given row does not exist", fs); break;
case EASYCSV_COLNOTEXIST: fputs("given column does not exist", fs); break;
/* User-facing failure */
case EASYCSV_PUSHCOLFAIL: fputs("failed to push value under column", fs); break;
case EASYCSV_COLNUMFAIL: fputs("failed to determine the column number of a value in the first row", fs); break;
default: fputs("unknown error, easycsv* is possibly NULL", fs); break;
}
if (_priv->fp != NULL)
fprintf(fs, " in %s", _priv->fp);
fputc('\n', fs);
}
int
_easycsv_checkcsvandstring_one(const _easycsv *csv,
const char *one)
{
if (csv == NULL) {
_easycsv_printerror(csv, EASYCSV_NULLCSV);
return -1;
}
if (one == NULL) {
_easycsv_printerror(csv, EASYCSV_EMPTYSTRING);
return -1;
}
return 0;
}
int
_easycsv_checkcsvandstring_two(const _easycsv *csv,
const char *one,
const char *two)
{
if (_easycsv_checkcsvandstring_one(csv, one) < 0)
return -1;
if (two == NULL) {
_easycsv_printerror(csv, EASYCSV_EMPTYSTRING);
return -1;
}
return 0;
}

178
src/_easycsv.h

@ -0,0 +1,178 @@
#ifndef _EASYCSV
#define _EASYCSV
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/sendfile.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <time.h>
#include <stdint.h>
#include "easycsv_error.h"
/* Generic type definitions for internal use */
typedef uint32_t row_t; // max length of 2^32 - 1
typedef uint32_t column_t;
typedef char* rowstr; // non-const, to free it after usage
/** Flags for error messages */
typedef enum {
EASYCSV_ERRORSTDERR = 0,
EASYCSV_ERROROFF,
EASYCSV_ERRORSTDOUT
} EASYCSV_ERRORMSG;
/** Flags to facilitate changing modes during file copying phases */
typedef enum {
EASYCSV_UNKNOWNMODE = 0,
EASYCSV_R,
EASYCSV_W
} EASYCSV_MODE;
/** Flags to parameterise the easycsv_insertvalue */
typedef enum {
EASYCSV_REPLACE, ///< (default) replaces word
EASYCSV_CONCAT, ///< concantates word at the end
EASYCSV_RCONCAT, ///< concantates word from the start
} EASYCSV_VALMODE;
/** Flags to parameterise sorting */
typedef enum {
EASYCSV_ALPHA, ///< sort alphabetically
EASYCSV_RALPHA, ///< sort reverse alphabetically
EASYCSV_NUMER, ///< sort numerically, from lowest value to highest
EASYCSV_RNUMER ///< sort from highest value to lowest
} EASYCSV_SORT;
/* Flags denoting cell type */
typedef enum {
EASYCSV_NONE,
EASYCSV_STRING,
EASYCSV_INT,
EASYCSV_FLOAT,
EASYCSV_UNKNOWNTYPE
} _EASYCSV_TYPE;
/* Private easycsv members */
typedef struct _easycsv {
FILE *file; // original CSV file
FILE *temp; // temporary CSV file for writing
char *fp;
char *tmpfp;
unsigned int rows;
unsigned int cols;
EASYCSV_ERRORMSG error;
#ifdef EASYCSV_DEBUG
clock_t start;
#endif
} _easycsv;
/* (Constructor) Initialise _easycsv */
_easycsv*
_easycsv_priv_init(const char*,
const EASYCSV_MODE,
const EASYCSV_ERRORMSG);
/* (Destructor) Free _easycsv memory */
void
_easycsv_priv_free(_easycsv*);
/* Verifies mode of file */
// int _easycsv_checkmode(struct easycsv*, const char);
/* Copies data from temp FILE to file FILE */
int
_easycsv_update(_easycsv*);
/* Rewind easycsv, checks for readability */
int
_easycsv_rewind(_easycsv*,
const EASYCSV_MODE);
/* Returns string of a specific row,
includes the '\n' character as well! */
char*
_easycsv_getrow(const _easycsv*,
const unsigned int);
/* Return column number of a named column */
int
_easycsv_getcolumn(const _easycsv*,
const char*);
/* Verifies the type of the value (eg: string or int) */
_EASYCSV_TYPE
_easycsv_checktype(const _easycsv*,
const int,
const int);
/* Verifies if there is a value or not */
int
_easycsv_checkifvalue(const _easycsv*,
const int,
const int);
/* Grab const char* in row */
char*
_easycsv_getvalueinrow(const _easycsv*,
const char*,
const unsigned int);
/* Returns char pointer to start of value in rowstr */
char*
_easycsv_setcharptovalue(const _easycsv*,
const char*,
const unsigned int);
/* Insert value in row in specific column */
char*
_easycsv_insertvalueinrow(const _easycsv*,
const char*,
const char*,
const unsigned int);
/* Calculate rows */
int
_easycsv_rows(_easycsv*,
const EASYCSV_MODE);
/* Calculate columns*/
int
_easycsv_columns(_easycsv*,
const EASYCSV_MODE);
void
_easycsv_printerror(const _easycsv*,
const EASYCSV_ERROR);
/* Print error from _easycsv struct in stderr */
void
_easycsv_geterror(const _easycsv*,
const EASYCSV_ERROR,
FILE*);
/* Check if easycsv* and const char* are NULL */
int
_easycsv_checkcsvandstring_one(const _easycsv*,
const char*);
/* Check if easycsv* and two const char* are NULL*/
int
_easycsv_checkcsvandstring_two(const _easycsv*,
const char*,
const char*);
/* Verifies if the string is not NULL or empty, returns 0 on success and -1 on failure */
// int _easycsv_checkstring(const char*);
/* Verifies if easycsv is not NULL or unallocated */
// int _easycsv_checkeasycsv(const struct easycsv*);
/* Verifies if int is */
// int _easycsv_checkunsigned(const int);
#endif

721
src/easycsv.c

@ -1,185 +1,8 @@
#include "easycsv.h"
#include "_easycsv.h"
#include "../include/easycsv.h"
/* Generic type definitions for internal use */
typedef uint32_t row_t; // max length of 2^32 - 1
typedef uint32_t column_t;
typedef char* rowstr; // non-const, to free it after usage
/* I may possibly need to make types for rows,
iterators and columns */
/* Flags denoting cell type */
typedef enum {
EASYCSV_NONE,
EASYCSV_STRING,
EASYCSV_INT,
EASYCSV_FLOAT,
EASYCSV_UNKNOWNTYPE
} _EASYCSV_TYPE;
/* Error flags */
typedef enum {
/* Generic errors */
EASYCSV_NOERROR, // no error
EASYCSV_NULLCSV, // easycsv* is NULL
EASYCSV_NULLPTR, // generic pointer is NULL
EASYCSV_EMPTYSTRING, // empty string
EASYCSV_EMPTYVALUE, // value is empty
EASYCSV_OVERMAXROW, // int exceeds row limit
EASYCSV_OVERMAXCOL, // int exceeds col limit
EASYCSV_ZEROROW,
EASYCSV_ZEROCOL,
/* File input/output errors */
EASYCSV_UNKNOWNIOMODE, // unknown file IO mode
EASYCSV_OPENFAIL, // fail to open
EASYCSV_REOPENFAIL, // fail to reopen
EASYCSV_EMPTYCSV, // csv is empty or does not exist
EASYCSV_UNWRITABLE, // csv mode not at EASYCSV_W
EASYCSV_UNREADABLE, // csv mode not at EASYCSV_R
EASYCSV_UPDATEFAIL, // update file fail = temp -> file
EASYCSV_UPDATETEMPFAIL, // update = -> temp
EASYCSV_FILEPTRFAIL, // move file pointer fail
/* Non-existant elements */
EASYCSV_ROWNOTEXIST, // row does not exist
EASYCSV_COLNOTEXIST, // column does not exist
/* User-facing failure */
EASYCSV_PUSHCOLFAIL, // push column value fail
EASYCSV_COLNUMFAIL, // column number retrieval fail
EASYCSV_READVALUEFAIL, // read value fail
} EASYCSV_ERROR;
/* Private easycsv members */
typedef struct _easycsv {
FILE *file; // original CSV file
FILE *temp; // temporary CSV file for writing
char *fp;
char *tmpfp;
unsigned int rows;
unsigned int cols;
EASYCSV_ERRORMSG error;
#ifdef EASYCSV_DEBUG
clock_t start;
#endif
} _easycsv;
/* PRIVATE FUNCTIONS */
/* (Constructor) Initialise _easycsv */
static _easycsv*
_easycsv_priv_init(const char*,
const EASYCSV_MODE,
const EASYCSV_ERRORMSG);
/* (Destructor) Free _easycsv memory */
static void
_easycsv_priv_free(_easycsv*);
/* Verifies mode of file */
// static int _easycsv_checkmode(struct easycsv*, const char);
/* Copies data from temp FILE to file FILE */
static int
_easycsv_update(easycsv*);
/* Rewind easycsv, checks for readability */
static int
_easycsv_rewind(_easycsv*,
const EASYCSV_MODE);
/* Returns string of a specific row,
includes the '\n' character as well! */
static char*
_easycsv_getrow(const easycsv*,
const unsigned int);
/* Return column number of a named column */
static int
_easycsv_getcolumn(const easycsv*,
const char*);
/* Verifies the type of the value (eg: string or int) */
static _EASYCSV_TYPE
_easycsv_checktype(const easycsv*,
const int,
const int);
/* Verifies if there is a value or not */
static int
_easycsv_checkifvalue(const easycsv*,
const int,
const int);
/* Grab const char* in row */
static char*
_easycsv_getvalueinrow(const _easycsv*,
const char*,
const unsigned int);
/* Returns char pointer to start of value in rowstr */
static char*
_easycsv_setcharptovalue(const _easycsv*,
const char*,
const unsigned int);
/* Insert value in row in specific column */
static char*
_easycsv_insertvalueinrow(const _easycsv*,
const char*,
const char*,
const unsigned int);
/* Calculate rows */
static int
_easycsv_rows(_easycsv*,
const EASYCSV_MODE);
/* Calculate columns*/
static int
_easycsv_columns(_easycsv*,
const EASYCSV_MODE);
static void
_easycsv_printerror(const _easycsv*,
const EASYCSV_ERROR);
/* Print error from _easycsv struct in stderr */
static void
_easycsv_geterror(const _easycsv*,
const EASYCSV_ERROR,
FILE*);
/* Check if easycsv* and const char* are NULL */
static int
_easycsv_checkcsvandstring_one(const easycsv*,
const char*);
/* Check if easycsv* and two const char* are NULL*/
static int
_easycsv_checkcsvandstring_two(const easycsv*,
const char*,
const char*);
/* Verifies if the string is not NULL or empty, returns 0 on success and -1 on failure */
// static int _easycsv_checkstring(const char*);
/* Verifies if easycsv is not NULL or unallocated */
// static int _easycsv_checkeasycsv(const struct easycsv*);
/* Verifies if int is */
// static int _easycsv_checkunsigned(const int);
/*
* ====================
* FUNCTION DEFINITIONS
* ====================
*/
/* == PUBLIC FUNCTIONS == */
// typedef struct _easycsv _easycsv;
// _easycsv* _easycsv_priv_init(const char *fp, const EASYCSV_MODE mode, const EASYCSV_ERRORMSG error);
/* CONSTRUCTORS AND DESTRUCTORS */
@ -248,7 +71,7 @@ easycsv_readvalue(const easycsv *csv,
}
/* END ARGS CHECK */
char *str = _easycsv_getrow(csv, row);
char *str = _easycsv_getrow(csv->_priv, row);
if (str == NULL) {
_easycsv_printerror(csv->_priv, EASYCSV_ROWNOTEXIST);
_easycsv_printerror(csv->_priv, EASYCSV_READVALUEFAIL);
@ -270,7 +93,7 @@ easycsv_readcolumnvalue(const easycsv *csv,
const unsigned int row)
{
/* ARGS CHECK */
if (_easycsv_checkcsvandstring_one(csv, col) < 0)
if (_easycsv_checkcsvandstring_one(csv->_priv, col) < 0)
return NULL;
if (row > csv->_priv->rows) {
@ -279,7 +102,7 @@ easycsv_readcolumnvalue(const easycsv *csv,
}
/* END ARGS CHECK */
int i = _easycsv_getcolumn(csv, col);
int i = _easycsv_getcolumn(csv->_priv, col);
if (i < 1) {
_easycsv_printerror(csv->_priv, EASYCSV_COLNUMFAIL);
return NULL;
@ -319,7 +142,7 @@ easycsv_insertvaluemode(easycsv *csv,
const EASYCSV_VALMODE valmode)
{
/* ARGS CHECK */
if (_easycsv_checkcsvandstring_one(csv, val) < 0)
if (_easycsv_checkcsvandstring_one(csv->_priv, val) < 0)
return -1;
if (col == 0) {
@ -337,7 +160,7 @@ easycsv_insertvaluemode(easycsv *csv,
if (row > csv->_priv->rows) {
}
char *rowstr = _easycsv_getrow(csv, row);
char *rowstr = _easycsv_getrow(csv->_priv, row);
if (rowstr == NULL)
return -1;
@ -415,7 +238,7 @@ easycsv_insertvaluemode(easycsv *csv,
/* Copy rows before newstr in csv to temp */
for (unsigned int i = 1; i < row; i++) {
str = _easycsv_getrow(csv, i);
str = _easycsv_getrow(csv->_priv, i);
if (col > csv->_priv->cols) {
str = realloc(str, strlen(str) + commas + 1);
for (size_t j = 0; j < commas; j++) {
@ -464,7 +287,7 @@ easycsv_insertvaluemode(easycsv *csv,
}
/* Update csv */
if (_easycsv_update(csv) < 0)
if (_easycsv_update(csv->_priv) < 0)
return -1;
/* END UPDATE CSV */
@ -492,7 +315,7 @@ easycsv_insertcolumnvaluemode(easycsv *csv,
const EASYCSV_VALMODE valmode)
{
/* ARGS CHECK */
if (_easycsv_checkcsvandstring_two(csv, col, val) < 0)
if (_easycsv_checkcsvandstring_two(csv->_priv, col, val) < 0)
return -1;
if (row == 0) {
@ -501,7 +324,7 @@ easycsv_insertcolumnvaluemode(easycsv *csv,
}
/* END ARGS CHECK */
int colnum = _easycsv_getcolumn(csv, col);
int colnum = _easycsv_getcolumn(csv->_priv, col);
if (colnum < 0) {
_easycsv_printerror(csv->_priv, EASYCSV_COLNUMFAIL);
return -1;
@ -517,7 +340,7 @@ easycsv_pushcolumn(easycsv *csv,
const char *col)
{
/* ARGS CHECK */
if (_easycsv_checkcsvandstring_one(csv, col) < 0)
if (_easycsv_checkcsvandstring_one(csv->_priv, col) < 0)
return -1;
/* END ARGS CHECK */
@ -539,7 +362,7 @@ easycsv_pushcolumn(easycsv *csv,
}
/* Grab first row */
char *str = _easycsv_getrow(csv, 1);
char *str = _easycsv_getrow(csv->_priv, 1);
char *pch = NULL;
size_t i;
@ -586,11 +409,11 @@ easycsv_pushcolumnvalue(easycsv *csv,
const char *val)
{
/* ARGS CHECK */
if (_easycsv_checkcsvandstring_two(csv, col, val) < 0)
if (_easycsv_checkcsvandstring_two(csv->_priv, col, val) < 0)
return -1;
/* ARGS CHECK */
int colnum = _easycsv_getcolumn(csv, col);
int colnum = _easycsv_getcolumn(csv->_priv, col);
if (colnum < 0) {
_easycsv_printerror(csv->_priv, EASYCSV_COLNUMFAIL);
return -1;
@ -662,11 +485,11 @@ easycsv_deletecolumnstr(easycsv *csv,
const char *col)
{
/* ARGS CHECK */
if (_easycsv_checkcsvandstring_one(csv, col) < 0)
if (_easycsv_checkcsvandstring_one(csv->_priv, col) < 0)
return -1;
/* END ARGS CHECK */
int colnum = _easycsv_getcolumn(csv, col);
int colnum = _easycsv_getcolumn(csv->_priv, col);
if (colnum < 0)
return -1;
@ -679,509 +502,3 @@ easycsV_deleterowint(easycsv *csv,
{
return 0;
}
/* PRIVATE FUNCTIONS */
/* (Constructor) Initialise _easycsv */
_easycsv*
_easycsv_priv_init(const char *fp,
const EASYCSV_MODE mode,
const EASYCSV_ERRORMSG error)
{
_easycsv *_priv = malloc(sizeof(_easycsv));
_priv->file = NULL;
_priv->temp = NULL;
_priv->fp = NULL;
_priv->tmpfp = NULL;
_priv->rows = 0;
_priv->cols = 0;
#ifdef EASYCSV_DEBUG
_priv->start = 0;
#endif
_priv->error = error;
/* Open file according to mode */
switch (mode) {
case EASYCSV_R: {
_priv->file = fopen(fp, "r");
break;
}
case EASYCSV_W: {
_priv->file = fopen(fp, "w");
break;
}
default: {
_easycsv_printerror(_priv, EASYCSV_UNKNOWNIOMODE);
_easycsv_priv_free(_priv);
return NULL;
}
}
if (_priv->file == NULL)
{
_easycsv_printerror(_priv, EASYCSV_OPENFAIL);
_easycsv_priv_free(_priv);
return NULL;
}
size_t stfp = strlen(fp);
/* Allocate memory for char* */
_priv->fp = malloc(stfp + 1); // + 1 for null
strcpy(_priv->fp, fp);
/* Calculate rows and cols if file exists */
if (access(_priv->fp, F_OK) == 0) {
_priv->rows = _easycsv_rows(_priv, mode);
_priv->cols = _easycsv_columns(_priv, mode);
}
if (mode == EASYCSV_W) {
/* csv->tmpfp = malloc(16 + stfp + 1); */
/* strncpy(csv->tmpfp, prefix, 16); */
/* strncat(csv->tmpfp, fp, stfp); */
do {
/* Write to temporary file */
unsigned int i = 1;
char buffer[21] = "/tmp/easycsv-"; // 13 char, 3 for digits, 4 for .csv, 1 for NULL
if (i < 100)
strncat(buffer, "0", 1);
if (i < 10)
strncat(buffer, "0", 1);
sprintf(buffer + strlen(buffer), "%i", i);
strcat(buffer, ".csv");
if (access(buffer, F_OK) < 0) {
i++;
}
else {
_priv->tmpfp = malloc(21);
strncpy(_priv->tmpfp, buffer, 21);
break;
}
} while (1);
_priv->temp = fopen(_priv->tmpfp, "w");
if (_priv->temp == NULL) {
_easycsv_printerror(_priv, EASYCSV_OPENFAIL);
_easycsv_priv_free(_priv);
return NULL;
}
/*
#ifdef EASYCSV_DEBUG
printf("[%i] easycsv_debug: temp file %s opened\n", clock() - csv->start, csv->tmpfp);
#endif*/
/*
if (freopen(csv->fp, csv->mode, csv->file) == NULL) {
fprintf(stderr, "easycsv: failed to set temporary file %s to %s mode\n", csv->tmpfp, csv->mode);
return NULL;
}
if (freopen(csv->tmpfp, csv->mode, csv->temp) == NULL) {
fprintf(stderr, "easycsv: failed to set temporary file %s to %s mode\n", csv->tmpfp, csv->mode);
return NULL;
}
*/