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annotate th_ioctx.c @ 72:43df05a632cb

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Break I/O context API, add function pointers to init/open/new functions.
author Matti Hamalainen <ccr@tnsp.org>
date Thu, 15 Nov 2012 19:52:09 +0200
parents ce49160d2599
children 3882efea2640
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1 /*
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2 * Standard I/O context helpers
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3 * Programmed and designed by Matti 'ccr' Hamalainen
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4 * (C) Copyright 2012 Tecnic Software productions (TNSP)
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5 *
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6 * Please read file 'COPYING' for information on license and distribution.
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7 */
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8 #include "th_ioctx.h"
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9 #include "th_string.h"
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10
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11 /* Simple STD I/O contexts
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12 */
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13 BOOL th_ioctx_init(th_ioctx_t *ctx, const char *filename,
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14 void (*error)(struct _th_ioctx_t *, const int, const char *msg),
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15 void (*msg)(struct _th_ioctx_t *, const char *msg))
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16
67
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17 {
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18 if (ctx == NULL || filename == NULL)
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19 return FALSE;
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20
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21 th_memset(ctx, 0, sizeof(ctx));
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22 ctx->error = error;
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23 ctx->msg = msg;
71
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24
67
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25 if ((ctx->filename = th_strdup(filename)) == NULL)
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26 return FALSE;
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27
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28 return TRUE;
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29 }
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30
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31
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32 BOOL th_ioctx_open(th_ioctx_t *ctx, const char *filename, const char *mode,
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33 void (*error)(struct _th_ioctx_t *, const int, const char *msg),
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34 void (*msg)(struct _th_ioctx_t *, const char *msg))
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35 {
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36 if (!th_ioctx_init(ctx, filename, error, msg) || mode == NULL)
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37 return FALSE;
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38
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39 if ((ctx->fp = fopen(filename, mode)) == NULL)
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40 return FALSE;
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41
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42 return TRUE;
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43 }
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44
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45
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46 void th_ioctx_close(th_ioctx_t *ctx)
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47 {
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48 if (ctx != NULL)
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49 {
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50 th_free(ctx->filename);
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51 ctx->filename = NULL;
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52
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53 if (ctx->fp != NULL)
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54 fclose(ctx->fp);
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55 ctx->fp = NULL;
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56 }
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57 }
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58
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59
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60 void th_ioctx_error(th_ioctx_t *ctx, const int err, const char *fmt, ...)
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61 {
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62 char *msg;
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63 va_list ap;
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64
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65 va_start(ap, fmt);
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66 msg = th_strdup_vprintf(fmt, ap);
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67 va_end(ap);
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68
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69 if (ctx->error != NULL)
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70 ctx->error(ctx, err, msg);
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71 else
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72 THERR("'%s' #%d: %s\n", ctx->filename, (unsigned int) ctx->line, msg);
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73
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74 th_free(msg);
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75 }
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77
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78 th_ioctx_t *th_ioctx_new(const char *filename,
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79 void (*error)(struct _th_ioctx_t *, const int, const char *msg),
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80 void (*msg)(struct _th_ioctx_t *, const char *msg))
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81 {
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82 th_ioctx_t *ctx = th_malloc0(sizeof(th_ioctx_t));
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83 if (ctx == NULL)
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84 return NULL;
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85
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86 th_ioctx_init(ctx, filename, error, msg);
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87 ctx->allocated = TRUE;
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88 return ctx;
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89 }
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90
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91
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92 void th_ioctx_free(th_ioctx_t *ctx)
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93 {
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94 th_ioctx_close(ctx);
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95
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96 if (ctx->allocated)
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97 th_free(ctx);
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98 }